CAMERA OPTICAL LENS

Abstract

The present disclosure relates to a technical field of optical lenses, and discloses a camera optical lens. The camera optical lens includes seven lenses. An order of the seven lenses is sequentially from an object side to an image side, which is shown as follows: a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, a sixth lens having a negative refractive power, and a seventh lens having a refractive power. While the camera optical lens has good optical performance, the camera optical lens further meets design requirements of large aperture, wide-angle, and ultra-thinness. In addition, on-axis and off-axis chromatic aberrations are fully corrected and the camera optical lens has excellent optical characteristics.

Description

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, and in particular to a camera optical lens suitable for handheld devices, such as smart phones, digital cameras, and imaging devices, such as monitors, PC lenses or car lens.

BACKGROUND

With emergence of smart phones in recent years, demand for miniature camera lens is increasing day by day, and because a pixel size of per photosensitive device shrinks, in addition a development trend of electronic products with good functions, and thin and portable appears, therefore, a miniaturized camera optical lens having good imaging quality becomes a mainstream in current market. In order to obtain better imaging quality, multi-piece lens structure is mainly adopted. Moreover, with development of technology and increases of diversified needs of users, a pixel area of per photosensitive device is constantly shrinking, and requirements of optical systems for imaging quality are constantly increasing. A seven-piece lens structure gradually appears in lens design. There is an urgent need for a wide-angled camera optical lens having excellent optical characteristics, a small size, and fully corrected aberrations.

SUMMARY

Aiming at above problems, the present disclosure seeks to provide a camera optical lens, which has good optical performance and meets design requirements of large aperture, ultra-thinness, and ultra-wide-angle.

In order to solve the above problems, embodiments of the present disclosure provide a camera optical lens. The camera optical lens being sequentially from an object side to an image side, comprising: a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, a sixth lens having a negative refractive power, and a seventh lens having a refractive power. A focal length of the camera optical lens is denoted as f, a total optical length of the camera optical lens is denoted as TTL, a focal length of the first lens is denoted as f1, a focal length of the second lens is denoted as f2, a combined focal length of the fifth lens and the sixth lens is denoted as f56, an on-axis thickness of the second lens is denoted as d3, an on-axis thickness of the third lens is denoted as d5, and the camera optical lens satisfies following relationships:

6.0TTL/f9.00;

1.50f2/f15.00;

−12.00f56/f−4.00;

1.50d3/d55.00.

As an improvement, a center curvature radius of an object side surface of the third lens is denoted as R5, a center curvature radius of an image side surface of the third lens is denoted as R6, and the camera optical lens satisfies a following relationship:

1.00<(R5+R6)/(R5−R6)0.

As an improvement, a center curvature radius of the object side surface of the seventh lens is denoted as R13, a center curvature radius of the image side surface of the seventh lens is denoted as R14, and the camera optical lens satisfies a following relationship:

R14/R13−2.00.

As an improvement, an object side surface of the first lens is convex in a paraxial region, an image side surface of the first lens is concave in a paraxial region. a focal length of the first lens is denoted as f1, a center curvature radius of the object side surface of the first lens is denoted as R1, a center curvature radius of the image side surface of the first lens is denoted as R2, the on-axis thickness of the first lens is denoted as d1, and the camera optical lens satisfies following relationships:

−4.54f1/f−1.13;

0.72(R1+R2)/(R1−R2)2.83;

0.02d1/TTL0.08.

As an improvement, an object side surface of the second lens is concave in a paraxial region, an image side surface of the second lens is convex in a paraxial region. A focal length of the second lens is denoted as f2, a center curvature radius of the object side surface of the second lens is denoted as R3, a center curvature radius of the image side surface of the second lens is denoted as R4, an on-axis thickness of the second lens is denoted as d3, and the camera optical lens satisfies following relationships:

−20.5f2/f−2.28;

−8.21(R3+R4)/(R3−R4)−0.86;

0.08d3/TTL0.37.

As an improvement, an object side surface of the third lens is convex in a paraxial region, an image side surface of the third lens is convex in a paraxial region. A focal length of the third lens is denoted as f3, an on-axis thickness of the third lens is denoted as d5, and the camera optical lens satisfies following relationships:

1.13 f3/f4.19;

0.03d5/TTL0.16.

As an improvement, an object side surface of the fourth lens is convex in a paraxial region, an image side surface of the fourth lens is convex in a paraxial region. A focal length of the fourth lens is denoted as f4, the center curvature radius of the object side surface of the fourth lens is denoted as R7, the center curvature radius of the image side surface of the fourth lens is denoted as R8, an on-axis thickness of the fourth lens is denoted as d7, and the camera optical lens satisfies following relationships:

1.48f4/f6.27;

−1.03(R7+R8)/(R7−R8)−0.15;

0.02d7/TTL0.17.

As an improvement, an object side surface of the fifth lens is convex in a paraxial region, an image side surface of the fifth lens is convex in a paraxial region. A focal length of the fifth lens is denoted as f5, a center curvature radius of the object side surface of the fifth lens is denoted as R9, a center curvature radius of the image side surface of the fifth lens is denoted as R10, an on-axis thickness of the fifth lens is denoted as d9, and the camera optical lens satisfies following relationships:

0.64f5/f3.89;

−0.29 R9+R10)/(R9−R10)0.70;

0.03d9/TTL0.13.

As an improvement, an object side surface of the sixth lens is concave in a paraxial region, an image side surface of the sixth lens is concave in a paraxial region. A focal length of the sixth lens is denoted as f6, a center curvature radius of the object side surface of the sixth lens is denoted as R11, a center curvature radius of the image side surface of the sixth lens is denoted as R12, an on-axis thickness of the sixth lens is denoted as d11, and the camera optical lens satisfies following relationships:

−4.15f6/f−0.61;

−1.93(R11+R12)/(R11−R12)0.01;

0.01 d11/TTL−0.03.

As an improvement, a focal length of the seventh lens is denoted as f7, an on-axis thickness of the seventh lens is denoted as d13, and the camera optical lens satisfies following relationships:

f7/f7.39;

0.05d13/TTL0.32.

As an improvement, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all made of a glass material.

The beneficial effects of the present disclosure are as follows. The camera optical lens provided by the present disclosure has excellent optical characteristics, and further has characteristics of large aperture, wide-angle, and ultra-thin, especially suitable for mobile phone camera lens assemblies and WEB camera lenses, which are composed of camera components having high pixels, such as CCD and CMOS.

BRIEF DESCRIPTION OF DRAWINGS

To more clearly illustrate the technical solutions in the embodiments of the present disclosure clearer, accompanying drawings that need to be used in the description of the embodiments will briefly introduce in following. Obviously, the drawings described below are only some embodiments of the present disclosure. For A person of ordinary skill in the art, other drawings can be obtained according to these without creative labor, wherein:

FIG. 1 is a schematic diagram of a structure of a camera optical lens according to a first embodiment of the present disclosure.

FIG. 2 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 1.

FIG. 3 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 1.

FIG. 4 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 1.

FIG. 5 is a schematic diagram of a structure of a camera optical lens according to a second embodiment of the present disclosure.

FIG. 6 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 5.

FIG. 7 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 5.

FIG. 8 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 5.

FIG. 9 is a schematic diagram of a structure of a camera optical lens according to a third embodiment of the present disclosure.

FIG. 10 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 9.

FIG. 11 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 9.

FIG. 12 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 9.

FIG. 13 is a schematic diagram of a structure of a camera optical lens according to a comparative embodiment of the present disclosure.

FIG. 14 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 13.

FIG. 15 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 13.

FIG. 16 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 13.

DETAILED DESCRIPTION OF EMBODIMENTS

In order to make objects, technical solutions, and advantages of the present disclosure clearer, embodiments of the present disclosure are described in detail with reference to accompanying drawings in following. A person of ordinary skill in the art can understand that, in the embodiments of the present disclosure, many technical details are provided to make readers better understand the present disclosure. However, even without these technical details and any changes and modifications based on the following embodiments, technical solutions required to be protected by the present disclosure can be implemented.

Embodiment 1

Referring to the drawings, the present disclosure provides a camera optical lens 10. FIG. 1 shows a structure of the camera optical lens 10 of a first embodiment of the present disclosure. The camera optical lens 10 includes seven lenses. Specifically, an order of the camera optical lens 10 is sequentially from an object side to an image side, which is shown as follows: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An optical element such as an optical filter GF may be disposed between the seventh lens L7 and an image surface Si. In this embodiment, two filters are included: GF1, GF2.

In the embodiment, the first lens L1 is made of a glass material, the second lens L2 is made of a glass material, the third lens L3 is made of a glass material, the fourth lens L4 is made of a glass material, the fifth lens L5 is made of a glass material, the sixth lens L6 is made of a glass material, and the seventh lens L7 is made of a glass material. In other alternative embodiments, the lenses may be made of other materials.

In this embodiment, object side surfaces and image side surfaces of the second lens L2 and the seventh lens L7 are both aspheric surfaces, and object side surfaces and image side surfaces of the other lenses are spherical surfaces.

In the embodiment, a focal length of the camera optical lens 10 is denoted as f, a total optical length of the camera optical lens 10 is denoted as TTL, which satisfies a following relationship: 6.0TTL/f9.00, and further specifies a ratio of total optical length of the camera optical lens 10 to the focal length of the camera optical lens 10. In a range of the conditional formula, it is beneficial to achieve an ultra-thin effect.

In the embodiment, a focal length of the first lens L1 is denoted as f1, a focal length of the second lens L2 is denoted as f2, which satisfies a following relationship: 1.50f2/f15.00, and further specifies a ratio of the focal length of the first lens L1 to the focal length of the second lens L2. In a range of the conditional formula, through the reasonable distribution of focal length, the camera optical lens has better imaging quality and lower sensitivity.

A combined focal length of the fifth lens L5 and the sixth lens L6 is denoted as f56, which satisfies a following relationship: −12.00f56/f−4.00, and further specifies a ratio of the combined focal length of the fifth lens L5 and the sixth lens L6 to the focal length of the camera optical lens 10. In a range of the conditional formula, through the reasonable distribution of focal length, the camera optical lens has better imaging quality and lower sensitivity.

An on-axis thickness of the second lens L2 is denoted as d3, an on-axis thickness of the third lens L3 is denoted as d5, which satisfies a following relationship: 1.50d3/d55.00, and further specifies a ratio of the on-axis thickness of the second lens L2 to the on-axis thickness of the third lens L3. In a range of the conditional formula, it is helpful to compress the total length of the camera optical lens 10 and achieve the ultra-thin effect.

A center curvature radius of an object side surface of the third lens L3 is denoted as R5, a center curvature radius of an image side surface of the third lens L3 is denoted as R6, which satisfies a following relationship: 1.00<(R5+R6)/(R5−R6)0, and further specifies a shape of the third lens L3. In a range of the conditional formula, it is beneficial to balance the field curvature of the system, so that the field curvature offset of the central field of view is less than 5 μm.

A center curvature radius of an object side surface of the seventh lens L7 is denoted as R13, a center curvature radius of an image side surface of the seventh lens L7 is denoted as R14, which satisfies a following relationship: R14/R13−2.00, and further specifies a shape of the seventh lens L7. In a range of the conditional formula, it is beneficial to correct astigmatism and distortion of the camera optical lens 10, so that |Distortion|65.0% and possibility of dark corners is further reduced.

In the embodiment, an object side surface of the first lens L1 is convex in a paraxial region, an image side surface of the first lens L1 is concave in a paraxial region. The first lens L1 has a negative refractive power. In other alternative embodiments, both the object side surface and the image side surface of the first lens L1 may be replaced with other concave and convex distributions.

The focal length of the camera optical lens 10 is denoted as f, the focal length of the first lens L1 is denoted as f1, which satisfies a following relationship: −4.54f1/f−1.13, and further specifies a ratio of the focal length of the first lens L1 to the focal length of the camera optical lens 10. In a range of the conditional formula, the first lens L1 has a suitable negative refractive power, which is beneficial to reduce aberrations of the optical system and also beneficial for ultra-thinness and wide-angle development. As an improvement, a following relationship is satisfied: −2.84f1/f−1.41.

A center curvature radius of the object side surface of the first lens L1 is denoted as R1, a center curvature radius of the image side surface of the first lens L1 is denoted as R2, which satisfies a following relationship: 0.72(R1+R2)/(R1−R2)2.83. Thus, a shape of the first lens L1 is reasonably controlled to effectively correct spherical aberrations of the camera optical lens 10. As an improvement, a following relationship is satisfied: 1.15(R1+R2)/(R1−R2)2.26.

The on-axis thickness of the first lens L1 is denoted as d1, the total optical length of the camera optical lens 10 is denoted as TTL, which satisfies a following relationship: 0.02d1/TTL0.08. In a range of the conditional formula, it is beneficial to achieve ultra-thinness. As an improvement, a following relationship is satisfied: 0.03d1/TTL0.06.

In the embodiment, an object side surface of the second lens L2 is concave in a paraxial region, an image side surface of the second lens L2 is convex in a paraxial region. The second lens L2 has a negative refractive power. In other alternative embodiments, both the object side surface and the image side surface of the second lens L2 may be replaced with other concave and convex distributions.

The focal length of the camera optical lens 10 is denoted as f, the focal length of the second lens L2 is denoted as f2, which satisfies a following relationship: −20.50 f2/f−2.28. A negative focal power of the second lens L2 is controlled in a reasonable range, which is beneficial to correct the aberrations of the optical system. As an improvement, a following relationship is satisfied: −12.82f2/f−2.85.

A center curvature radius of the object side surface of the second lens L2 is denoted as R3, a center curvature radius of the image side surface of the second lens L2 is denoted as R4, which satisfies a following relationship: −8.21(R3+R4)/(R3−R4)−0.86, and further specifies a shape of the second lens L2. In a range of the conditional formula, with the development of the camera optical lens 10 toward to ultra-thinness and wide-angle, it is beneficial to correct a problem of axial chromatic aberrations. As an improvement, a following relationship is satisfied: −5.13 ((R3+R4)/(R3−R4)−1.07.

An on-axis thickness of the second lens L2 is denoted as d3, the total optical length of the camera optical lens 10 is denoted as TTL, which satisfies a following relationship: 0.08d3/TTL0.37. In a range of the conditional formula, it is beneficial to achieve ultra-thinness. As an improvement, a following relationship is satisfied: 0.13d3/TTL0.29.

In the embodiment, an object side surface of the third lens L3 is convex in a paraxial region, the image side surface of the third lens L3 is convex in a paraxial region. The third lens L3 has a positive refractive power. In other alternative embodiments, both the object side surface and the image side surface of the third lens L3 may be replaced with other concave and convex distributions.

The focal length of the camera optical lens 10 is denoted as f, a focal length of the third lens L3 is denoted as f3, which satisfies a following relationship: 1.13f3/f4.19. Through a reasonable distribution of optical power, the optical system has better imaging quality and lower sensitivity. As an improvement, a following relationship is satisfied: 1.81f3/f3.36.

An on-axis thickness of the third lens L3 is denoted as d5, the total optical length of the camera optical lens 10 is denoted as TTL, which satisfies a following relationship: 0.03d5/TTL0.16. In a range of the conditional formula, it is beneficial to achieve ultra-thinness. As an improvement, a following relationship is satisfied: 0.04d5/TTL0.13.

In the embodiment, the object side surface of the fourth lens L4 is convex in a paraxial region, the image side surface of the fourth lens L4 is convex in a paraxial region. The fourth lens L4 has a positive refractive power. In other alternative embodiments, both the object side surface and the image side surface of the fourth lens L4 may be replaced with other concave and convex distributions.

The focal length of the camera optical lens 10 is denoted as f, a focal length of the fourth lens L4 is denoted as f4, which satisfies a following relationship: 1.48f4/f6.27. Through a reasonable distribution of focal power, the optical system has better imaging quality and lower sensitivity. As an improvement, a following relationship is satisfied: 2.37f4/f5.01.

A center curvature radius of the object side surface of the fourth lens L4 is denoted as R7, a center curvature radius of the image side surface of the fourth lens L4 is denoted as R8, which satisfies a following relationship: −1.03(R7+R8)/(R7−R8)−0.15, and further specifies a shape of the fourth L4. In a range of the conditional formula, with the development of the camera optical lens 10 toward to ultra-thinness and wide-angle, it is beneficial to correct a problem of axial chromatic aberrations. As an improvement, a following relationship is satisfied: −0.64(R7+R8)/(R7−R8)−0.18.

An on-axis thickness of the fourth lens L4 is denoted as d7, the total optical length of the camera optical lens 10 is denoted as TTL, which satisfies a following relationship: 0.02d7/TTL0.17. In a range of the conditional formula, it is beneficial to achieve ultra-thinness. As an improvement, a following relationship is satisfied: 0.03d7/TTL0.14.

In the embodiment, the object side surface of the fifth lens L5 is convex in a paraxial region, an image side surface of the fifth lens L5 is convex in a paraxial region. The fifth lens L5 has a positive refractive power. In other alternative embodiments, both the object side surface and the image side surface of the fifth lens L5 may be replaced with other concave and convex distributions.

The focal length of the camera optical lens 10 is denoted as f, a focal length of the fifth lens L5 is denoted as f5, which satisfies a following relationship: 0.64f5/f3.89. A limitation of the fifth lens L5 may effectively make a light angle of the camera optical lens 10 smooth and reduce tolerance sensitivity. As an improvement, a following relationship is satisfied: 1.02f5/f3.11.

A center curvature radius of the object side surface of the fifth lens L5 is denoted as R9, a center curvature radius of the image side surface of the fifth lens L5 is denoted R10, which satisfies a following relationship: −0.29(R9+R10)/(R9−R10) 0.70, and further specifies a shape of the fifth lens L5. In a range of the conditional formula, it is beneficial to correct the astigmatism and distortion of the camera optical lens 10. As an improvement, a following relationship is satisfied: −0.18(R9+R10)/(R9−R10)0.56.

An on-axis thickness of the fifth lens L5 is denoted as d9, the total optical length of the camera optical lens 10 is denoted as TTL, which satisfies a following relationship: 0.03d9/TTL0.13. In a range of the conditional formula, it is beneficial to achieve ultra-thinness. As an improvement, a following relationship is satisfied: 0.04d9/TTL0.10.

In the embodiment, an object side surface of the sixth lens L6 is concave in a paraxial region, and an image side surface of the sixth lens L6 is concave in a paraxial region. The sixth lens L6 has a negative refractive power. In other alternative embodiments, both the object side surface and the image side surface of the sixth lens L6 may be replaced with other concave and convex distributions.

The focal length of the camera optical lens 10 is denoted as f, a focal length of the sixth lens L6 is denoted as f6, which satisfies a following relationship: −4.1f6/f−0.61. Through a reasonable distribution of the focal power, the camera optical lens 10 has better imaging quality and lower sensitivity. As an improvement, a following relationship is satisfied: −2.59f6/f−0.77.

A center curvature radius of the object side surface of the sixth lens L6 is denoted as R11, a center curvature radius of the image side surface of the sixth lens L6 is denoted as R12, which satisfies a following relationship: −1.93 (R11+R12)/(R11−R12)0.01, and further specifies a shape of the sixth lens L6. In a range of the conditional formula, with the ultra-thin and wide-angle development, it is beneficial to correct the aberrations of off-axis angle of view and other problems. As an improvement, a following relationship is satisfied: −1.21(R11+R12)/(R11−R12) 0.01.

An on-axis thickness of the sixth lens L6 is denoted as d11, the total optical length of the camera optical lens 10 is denoted as TTL, which satisfies a following relationship: 0.01d11/TTL0.03. In a range of the conditional formula, it is beneficial to achieve ultra-thinness.

In the embodiment, the object side surface of the seventh lens L7 is convex in a paraxial region, the image side surface of the seventh lens L7 is convex in a paraxial region. The seventh lens L7 has a positive refractive power. In other alternative embodiments, both the object side surface and the image side surface of the seventh lens L7 may be replaced with other concave and convex distributions, and the seventh lens L7 may also have a negative refractive power.

The focal length of the camera optical lens 10 is denoted as f, a focal length of the seventh lens L7 is denoted as f7, which satisfies a following relationship: f7/f7.39. Through a reasonable distribution of the focal power, the optical system has better imaging quality and lower sensitivity. As an improvement, a following relationship is satisfied: f7/f5.91.

An on-axis thickness of the seventh lens L7 is denoted as d13, the total optical length of the camera optical lens 10 is denoted as TTL, which satisfies a following relationship: 0.05d13/TTL0.32. In a range of the conditional formula, it is beneficial to achieve ultra-thinness. As an improvement, a following relationship is satisfied: 0.08d13/TTL0.25.

In the embodiment, an image height of the camera optical lens 10 is denoted as IH, the total optical length of the camera optical lens 10 is denoted as TTL, which satisfies a following relationship: TTL/IH8.36, thereby being beneficial to achieve ultra-thinness. As an improvement, a following relationship is satisfied: TTL/IH8.13.

In the embodiment, a field of view of the camera optical lens 10 is denoted as FOV, the FOV is greater than or equal to 136°, thereby achieving the wide-angle. As an improvement, the FOV is greater than or equal to 138°.

In the embodiment, an F number of the camera optical lens 10 is denoted as FNO, the FNO is less than or equal to 1.65, thereby achieving a large aperture, and the camera optical lens 10 has a good imaging performance. As an improvement, the FNO is less than or equal to 1.62.

While the camera optical lens 10 has excellent optical characteristics, the camera optical lens 10 further meets design requirements of large aperture, wide-angle, and ultra-thinness. According to the characteristics of the camera optical lens 10, the camera optical lens 10 is especially suitable for mobile phone camera lens assemblies and WEB camera lenses, which are composed of camera components having high pixels, such as CCD and CMOS.

Following examples are used to illustrate the camera optical lens 10 of the present disclosure. Symbols described in each of the examples are as follows. Units of focal length, on-axis distance, central curvature radius, on-axis thickness, inflection point position, and stationary point position are millimeter (mm).

TTL denotes a total optical length (an on-axis distance from the object side surface of the first lens L1 to the image surface Si), a unit of which is mm.

FNO denotes an F number of the camera optical lens and refers to a ratio of an effective focal length of the camera optical lens 10 to an entrance pupil diameter of the camera optical lens 10.

As an improvement, inflection points and/or stationary points may be arranged on the object side surface and/or the image side surface of the lenses, thus meeting high-quality imaging requirements. For specific implementable schemes, refer to the following.

Table 1 and table 2 show design data of the camera optical lens 10 according to a first embodiment of the present disclosure.

	TABLE 1
	R	d	nd	vd
S1	∞	d0=	−16.474
R1	23.041	d1=	1.559	nd1	1.8830	v1	40.81
R2	4.620	d2=	4.712
R3	−8.990	d3=	5.000	nd2	1.7504	v2	45.51
R4	−36.283	d4=	0.100
R5	17.952	d5=	2.828	nd3	1.8830	v3	40.81
R6	−18.670	d6=	1.636
R7	8.908	d7=	3.522	nd4	1.4378	v4	94.52
R8	−15.240	d8=	0.110
R9	7.214	d9=	2.580	nd5	1.4970	v5	81.61
R10	−9.646	d10=	0.000
R11	−9.646	d11=	0.700	nd6	1.8081	v6	22.76
R12	9.587	d12=	1.256
R13	10.996	d13=	3.213	nd7	1.5267	v7	76.46
R14	−179.802	d14=	0.500
R15	∞	d15=	0.500	ndg1	1.5233	vg1	54.52
R16	∞	d16=	0.900
R17	∞	d17=	0.500	ndg2	1.5168	vg2	64.17
R18	∞	d18=	0.987

Where, meanings of various symbols are as follows.

S1: aperture;

R: a central curvature radius of an optical surface;

R1: a central curvature radius of the object side surface of the first lens L1;

R2: a central curvature radius of the image side surface of the first lens L1;

R3: a central curvature radius of the object side surface of the second lens L2;

R4: a central curvature radius of the image side surface of the second lens L2;

R5: a central curvature radius of the object side surface of the third lens L3;

R6: a central curvature radius of the image side surface of the third lens L3;

R7: a central curvature radius of the object side surface of the fourth lens L4;

R8: a central curvature radius of the image side surface of the fourth lens L4;

R9: a central curvature radius of the object side surface of the fifth lens L5;

R10: a central curvature radius of the image side surface of the fifth lens L5;

R11: a central curvature radius of the object side surface of the sixth lens L6;

R12: a central curvature radius of the image side surface of the sixth lens L6;

R13: a central curvature radius of the object side surface of the seventh lens L7;

R14: a central curvature radius of the image side surface of the seventh lens L7;

R15: a central curvature radius of the object side surface of the optical filter GF1;

R16: a central curvature radius of the image side surface of the optical filter GF1;

R17: a central curvature radius of the object side surface of the optical filter GF2;

R18: a central curvature radius of the image side surface of the optical filter GF2;

d: an on-axis thickness of a lens, an on-axis distance between lenses;

d0: an on-axis distance from the aperture S1 to the object side surface of the first lens L1;

d1: an on-axis thickness of the first lens L1;

d2: an on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

d3: an on-axis thickness of the second lens L2;

d4: an on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

d5: an on-axis thickness of the third lens L3;

d6: an on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

d7: an on-axis thickness of the fourth lens L4;

d8: an on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

d9: an on-axis thickness of the fifth lens L5;

d10: an on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

d11: an on-axis thickness of the sixth lens L6;

d12: an on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

d13: an on-axis thickness of the seventh lens L7;

d14: an on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF1;

d15: an on-axis thickness of the optical filter GF1;

d16: on-axis distance from the image side surface of the optical filter GF1 to the object side surface of the optical filter GF2;

d17: an on-axis thickness of the optical filter GF2;

d18: on-axis distance from the image side surface of the optical filter GF2 to the image surface Si;

nd: refractive index of a d line (the d line is green light having a wavelength of 550 nm);

nd1: refractive index of a d line of the first lens L1;

nd2: refractive index of a d line of the second lens L2;

nd3: refractive index of a d line of the third lens L3;

nd4: refractive index of a d line of the fourth lens L4;

nd5: refractive index of a d line of the fifth lens L5;

nd6: refractive index of a d line of the sixth lens L6;

nd7: refractive index of a d line of the seventh lens L7;

ndg1: refractive index of a d line of the optical filter GF1;

ndg2: refractive index of a d line of the optical filter GF2;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

v7: abbe number of the seventh lens L7;

vg1: abbe number of the optical filter GF1;

vg2: abbe number of the optical filter GF2.

Table 2 shows aspheric surface data of each of the lenses in the camera optical lens 10 according to the first embodiment of the present disclosure.

TABLE 2
	Conic
	coefficient	Aspheric surface coefficients
	k	A4	A6	A8	A10	A12
R3	2.7499E−02	−2.2409E−04	−1.9396E−05	9.3300E−06	−1.7869E−06	2.0852E−07
R4	5.2196E+01	2.0747E−04	2.3501E−05	−3.9861E−06	6.6511E−07	−6.7162E−08
R13	−7.7727E+01	4.1713E−03	−1.5417E−03	2.9134E−04	−4.1352E−05	3.9143E−06
R14	−4.9655E+02	−9.7873E−04	−2.6313E−04	7.1612E−05	−1.3213E−05	1.5285E−06
	Conic
	coefficient	Aspheric surface coefficients
	k	A14	A16	A18	A20
R3	2.7499E−02	−1.4979E−08	6.4838E−10	−1.5335E−11	1.5050E−13
R4	5.2196E+01	4.2699E−09	−1.6452E−10	3.5091E−12	−3.1103E−14
R13	−7.7727E+01	−2.4279E−07	9.5359E−09	−2.1379E−10	2.0686E−12
R14	−4.9655E+02	−1.1084E−07	4.9057E−09	−1.2045E−10	1.2538E−12

For convenience, an aspheric surface of each lens surface uses an aspheric surface shown in a formula (1) below. However, the present disclosure is not limited to the aspherical polynomials form shown in the formula (1).

z=(cr²)/{1+[1−(k+1)(c²r²)]^1/2}+A4r⁴+A6r⁶+A8r⁸+A10r¹⁰+A12r¹²+A14r¹⁴+A16r¹⁶+A18r¹⁸+A20r²⁰  (1)

Herein, k denotes a conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 denote aspheric surface coefficients, c denotes a curvature of a center region of the optical surface, r denotes a vertical distance from points on an aspheric surface curve to an optical axis, z denotes a depth of the aspheric surface (a point on the aspheric surface and a distance of which from the optical axis is r, a vertical distance between the point and a tangent to a vertex on the optical axis of the aspherical surface).

Table 3 and Table 4 show design data of inflection points and stationary points of each of the lenses of the camera optical lens 10 according to the first embodiment of the present disclosure. P1R1 and P1R2 respectively denote the object side surface and the image side surface of the first lens L1, P2R1 and P2R2 respectively denote the object side surface and the image side surface of the second lens L2, P3R1 and P3R2 respectively denote the object side surface and the image side surface of the third lens L3, P4R1 and P4R2 respectively denote the object side surface and the image side surface of the fourth lens L4, P5R1 and P5R2 respectively denote the object side surface and the image side surface of the fifth lens L5, P6R1 and P6R2 respectively denote the object side surface and the image side surface of the sixth lens L6, and P7R1 and P7R2 respectively denote the object side surface and the image side surface of the seventh lens L7. The data in the column named “inflection point position” refer to vertical distances from inflection points arranged on each lens surface to an optic axis of the camera optical lens 10. The data in the column named “stationary point position” refer to vertical distances from stationary points arranged on each lens surface to the optical axis of the camera optical lens 10.

	TABLE 3
	Number(s)of	Inflection point
	inflection points	position 1
	P1R1	0	/
	P1R2	0	/
	P2R1	0	/
	P2R2	1	3.095
	P3R1	0	/
	P3R2	0	/
	P4R1	0	/
	P4R2	0	/
	P5R1	0	/
	P5R2	0	/
	P6R1	0	/
	P6R2	0	/
	P7R1	1	1.655
	P7R2	1	4.185

	TABLE 4
	Number(s) of	Stationary point
	stationary points	position 1
	P7R1	1	2.685

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color of lights having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 436 nm after passing the camera optical lens 10 according to the first embodiment of the present disclosure, respectively. FIG. 4 illustrates a field curvature and a distortion of the light having the wavelength of 555 nm after passing the camera optical lens 10 according to the first embodiment of the present disclosure. A field curvature S in FIG. 4 is a field curvature in a sagittal direction, and T is a field curvature in a meridian direction.

The following table 17 further shows values corresponding to various parameters specified in conditional formulas in each of embodiments 1, 2, and 3.

As shown in table 17, various conditional formulas are satisfied in the first embodiment.

In the embodiment, an entrance pupil diameter is denoted as ENPD and the ENPD of the camera optical lens 10 is 2.656 mm. An image height is denoted as IH and the IH is 4.626 mm. A field of view is denoted as FOV and the FOV in a diagonal is 140.00 degree. The camera optical lens 10 meets the design requirements of large aperture, wide-angle, and ultra-thinness, on-axis and off-axis chromatic aberrations of which are fully corrected, and the camera optical lens 10 has excellent optical characteristics.

Embodiment 2

The second embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that according to the first embodiment. Only differences are listed below.

FIG. 5 shows a structure of the camera optical lens 20 according to the second embodiment of the present disclosure.

Table 5 and table 6 show design data of the camera optical lens 20 according to the second embodiment of the present disclosure.

	TABLE 5
	R	d	nd	vd
S1	∞	d0=	−14.443
R1	24.318	d1=	0.800	nd1	1.6511	v1	55.89
R2	4.396	d2=	5.334
R3	−7.296	d3=	4.457	nd2	1.7504	v2	44.94
R4	−11.995	d4=	0.050
R5	7.404	d5=	2.752	nd3	1.7440	v3	44.90
R6	−84.809	d6=	1.105
R7	9.784	d7=	0.859	nd4	1.4378	v4	94.52
R8	−30.568	d8=	0.050
R9	8.913	d9=	1.772	nd5	1.6204	v5	60.37
R10	−4.703	d10=	0.000
R11	−4.703	d11=	0.500	nd6	1.7552	v6	27.53
R12	7.532	d12=	1.044
R13	11.264	d13=	5.467	nd7	1.5267	v7	76.60
R14	−83.294	d14=	0.500
R15	∞	d15=	0.400	ndg1	1.5233	vg1	54.52
R16	∞	d16=	0.400
R17	∞	d17=	0.300	ndg2	1.5168	vg2	64.17
R18	∞	d18=	0.166

Table 6 shows aspheric surface data of each of the lenses in the camera optical lens 20 according to the second embodiment of the present disclosure.

TABLE 6
	Conic
	coefficient	Aspheric surface coefficients
	k	A4	A6	A8	A10	A12
R3	−9.1305E−01	−1.8232E−04	−2.8001E−05	6.1391E−06	4.9933E−07	−3.1914E−07
R4	6.6681E+00	6.2602E−04	4.4327E−05	−6.2094E−06	7.8802E−07	1.9008E−08
R13	−2.4107E+01	−1.3326E−04	−7.0490E−04	2.6658E−04	−7.6403E−05	1.3410E−05
R14	0.0000E+00	1.6206E−03	−1.0695E−03	2.3700E−04	−3.5316E−05	3.3865E−06
	Conic
	coefficient	Aspheric surface coefficients
	k	A14	A16	A18	A20
R3	−9.1305E−01	4.8583E−08	−3.6304E−09	1.3739E−10	−2.1064E−12
R4	6.6681E+00	−1.3652E−08	1.4315E−09	−6.5412E−11	1.1702E−12
R13	−2.4107E+01	−1.4522E−06	9.2400E−08	−3.1391E−09	4.3907E−11
R14	0.0000E+00	−2.0850E−07	7.9751E−09	−1.7220E−10	1.6016E−12

Table 7 and Table 8 show design data of inflection points and stationary points of each of the lenses of the camera optical lens 20 according to the second embodiment of the present disclosure.

	TABLE 7
	Number(s) of	Inflection point	Inflection point
	inflection points	position 1	position 2
	P1R1	0	/	/
	P1R2	0	/	/
	P2R1	0	/	/
	P2R2	2	3.875	3.915
	P3R1	0	/	/
	P3R2	0	/	/
	P4R1	0	/	/
	P4R2	0	/	/
	P5R1	0	/	/
	P5R2	0	/	/
	P6R1	0	/	/
	P6R2	0	/	/
	P7R1	1	1.585	/
	P7R2	0	/	/

	TABLE 8
	Number(s) of	Stationary point
	stationary points	position 1
	P7R1	1	2.515

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of the lights having the wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 436 nm after passing the camera optical lens 20 according to the second embodiment of the present disclosure, respectively. FIG. 8 illustrates a field curvature and a distortion of the light having the wavelength of 555 nm after passing the camera optical lens 20 according to the second embodiment of the present disclosure. A field curvature S in FIG. 8 is a field curvature in a sagittal direction, and T is a field curvature in a meridian direction.

As shown in table 17, the second embodiment satisfies various conditional formulas.

In the embodiment, an entrance pupil diameter is denoted as ENPD and the ENPD of the camera optical lens 20 is 2.544 mm. An image height is denoted as IH and the IH is 4.626 mm. A field of view is denoted as FOV and the FOV in a diagonal is 141.80 degree. The camera optical lens 20 meets the design requirements of large aperture, wide-angle, and ultra-thinness, the on-axis and off-axis chromatic aberrations of which are fully corrected, and the camera optical lens 20 has excellent optical characteristics.

Embodiment 3

The third embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that according to the first embodiment. Only differences are listed below.

In the embodiment, the object side surface of the seventh lens L7 is concave in a paraxial region, the image side surface of the seventh lens L7 is concave in a paraxial region, the seventh lens L7 has a negative refractive power, include an optical filter GF.

FIG. 9 shows a structure of the camera optical lens 30 according to the third embodiment of the present disclosure.

Table 9 and table 10 show design data of the camera optical lens 30 according to the third embodiment of the present disclosure.

	TABLE 9
	R	d	nd	vd
S1	∞	d0=	−21.892
R1	17.596	d1=	1.462	nd1	1.8830	v1	40.81
R2	5.395	d2=	6.012
R3	−8.616	d3=	9.007	nd2	1.7504	v2	44.94
R4	−68.469	d4=	0.050
R5	19.112	d5=	1.817	nd3	1.8830	v3	40.81
R6	−20.731	d6=	3.312
R7	8.229	d7=	3.951	nd4	1.4378	v4	94.52
R8	−12.828	d8=	0.050
R9	19.333	d9=	1.823	nd5	1.4970	v5	81.61
R10	−7.047	d10=	0.000
R11	−7.047	d11=	0.612	nd6	1.8081	v6	22.76
R12	409.423	d12=	1.837
R13	−2739332.523	d13=	3.849	nd7	1.5267	v7	76.60
R14	5735918.248	d14=	0.500
R15	∞	d15=	0.400	ndg	1.5233	vg	54.52
R16	∞	d16=	2.172

Table 10 shows aspheric surface data of each of the lenses in the camera optical lens 30 according to the third embodiment of the present disclosure.

TABLE 10
	Conic
	coefficient	Aspheric surface coefficients
	k	A4	A6	A8	A10	A12
R3	−1.8769E−01	−6.3089E−05	−1.8101E−05	3.9670E−06	−4.1549E−07	2.5257E−08
R4	2.5840E+01	1.5472E−04	1.0812E−05	−1.8402E−06	2.2945E−07	−1.7750E−08
R13	0.0000E+00	−1.3427E−03	−2.4857E−05	−6.9004E−08	7.6778E−07	−1.3077E−07
R14	0.0000E+00	−1.0814E−03	−2.1229E−05	5.5042E−06	−3.5547E−07	1.5014E−08
	Conic
	coefficient	Aspheric surface coefficients
	k	A14	A16	A18	A20
R3	−1.8769E−01	−9.1236E−10	1.9234E−11	−2.1685E−13	1.0002E−15
R4	2.5840E+01	8.9122E−10	−2.8425E−11	5.2312E−13	−4.2051E−15
R13	0.0000E+00	1.1284E−08	−5.5070E−10	1.4501E−11	−1.5770E−13
R14	0.0000E+00	−3.7610E−10	5.4377E−12	−4.3276E−14	1.5214E−16

Table 11 and Table 12 show design data of inflection points and stationary points of each of the lenses of the camera optical lens 30 according to the third embodiment of the present disclosure.

	TABLE 11
	Number(s) of	Inflection point
	inflection points	position 1
	P2R2	1	2.485
	P7R2	1	3.885

	TABLE 12
	Number(s) of	Stationary point
	stationary points	position 1
	P2R2	1	4.015

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of the lights having the wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 436 nm after passing the camera optical lens 30 according to the third embodiment of the present disclosure, respectively. FIG. 12 illustrates a field curvature and a distortion of the light having the wavelength of 555 nm after passing the camera optical lens 30 according to the third embodiment of the present disclosure. A field curvature S in FIG. 12 is a field curvature in a sagittal direction, and T is a field curvature in a meridian direction.

The following table 17 lists numerical values corresponding to each conditional formula in the embodiment according to the above-mentioned conditional formulas.

In the embodiment, an entrance pupil diameter is denoted as ENPD and the ENPD of the camera optical lens 30 is 2.553 mm. An image height is denoted as IH and the IH is 4.626 mm. A field of view is denoted as FOV and the FOV in the diagonal is 139.40 degree. The camera optical lens 30 meets the design requirements of the large aperture, wide-angle, and ultra-thinness, the on-axis and off-axis chromatic aberrations of which are fully corrected, and the camera optical lens 30 has excellent optical characteristics.

Comparative Embodiment

The comparative embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that according to the first embodiment. Only differences are listed below.

In the embodiment, there is only one optical filter GF.

FIG. 13 shows a structure of the camera optical lens 40 according to the fifth embodiment of the present disclosure.

Table 13 and table 14 show design data of the camera optical lens 40 according to the comparative embodiment of the present disclosure.

	TABLE 13
	R	d	nd	vd
S1	∞	d0=	−23.621
R1	21.339	d1=	3.000	nd1	1.8830	v1	40.81
R2	5.223	d2=	7.068
R3	−8.776	d3=	8.922	nd2	1.7504	v2	44.94
R4	−134.785	d4=	0.050
R5	17.665	d5=	1.998	nd3	1.8830	v3	40.81
R6	−18.171	d6=	2.140
R7	8.220	d7=	4.242	nd4	1.4378	v4	94.52
R8	−15.446	d8=	0.050
R9	16.520	d9=	1.924	nd5	1.4970	v5	81.61
R10	−7.103	d10=	0.000
R11	−7.103	d11=	1.093	nd6	1.8081	v6	22.76
R12	13.637	d12=	0.992
R13	8.75	d13=	3.001	nd7	1.5267	v7	76.60
R14	−71.51	d14=	0.500
R15	∞	d15=	0.400	ndg	1.5233	vg	54.52
R16	∞	d16=	2.888

Table 14 shows aspheric surface data of each of the lenses in the camera optical lens 40 according to the comparative embodiment of the present disclosure.

TABLE 14
	Conic
	coefficient	Aspheric surface coefficients
	k	A4	A6	A8	A10	A12
R3	−5.2765E−01	9.9562E−06	1.1968E−05	6.3915E−07	−3.5457E−07	4.1231E−08
R4	4.3433E+01	1.3808E−04	2.0904E−05	−2.8667E−06	1.6709E−07	1.7881E−09
R13	0.0000E+00	−1.3568E−03	3.8930E−05	−2.2836E−05	3.7233E−06	−4.0676E−07
R14	0.0000E+00	−4.5039E−04	−2.4424E−05	−8.3489E−06	2.0932E−06	−2.3986E−07
	Conic
	coefficient	Aspheric surface coefficients
	k	A14	A16	A18	A20
R3	−5.2765E−01	−2.3372E−09	7.0495E−11	−1.0816E−12	6.6360E−15
R4	4.3433E+01	−7.0150E−10	3.3872E−11	−6.7248E−13	4.7910E−15
R13	0.0000E+00	3.0586E−08	−1.4062E−09	3.5035E−11	−3.5981E−13
R14	0.0000E+00	1.5919E−08	−5.8623E−10	1.1037E−11	−8.2898E−14

Table 15 and Table 16 show design data of inflection points and stationary points of each of the lenses of the camera optical lens 40 according to the comparative embodiment of the present disclosure.

	TABLE 15
	Number(s) of	Inflection point	Inflection point
	inflection points	position 1	position 2
	P2R2	2	1.735	5.285
	P7R1	2	2.425	3.835
	P7R2	1	3.715	/

	TABLE 20
	Number(s) of	Stationary	Stationary
	stationary points	point position 1	point position 2
	P2R2	2	2.995	5.635

FIG. 14 and FIG. 19 illustrate a longitudinal aberration and a lateral color of the lights having the wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 436 nm after passing the camera optical lens 40 according to the fourth embodiment of the present disclosure, respectively. FIG. 16 illustrates a field curvature and a distortion of the light having the wavelength of 555 nm after passing the camera optical lens 40 according to the comparative embodiment of the present disclosure. A field curvature S in FIG. 16 is a field curvature in a sagittal direction, and T is a field curvature in a meridian direction.

The following table 17 lists numerical values corresponding to each conditional formula in the embodiment according to the above-mentioned conditional formulas. Obviously, the camera optical lens 40 of the embodiment does not satisfy the above conditional formula: 6.00TTL/f0.00, ultra-thinning is insufficient.

In the embodiment, an entrance pupil diameter is denoted as ENPD and the ENPD of the camera optical lens 40 is 2.205 mm. An image height is denoted as IH and the IH is 4.626 mm. A field of view is denoted as FOV and the FOV in the diagonal is 154.20 degree. The camera optical lens 40 doesn't meet the design requirements of the large aperture, wide-angle, and ultra-thinness.

TABLE 17
Parameters
and	Embodiment	Embodiment	Embodiment	comparative
conditions	1	2	3	embodiment
TTL/f	7.641	6.379	9.000	10.847
f2/f1	2.538	5.000	1.505	1.504
f56/f	−7.445	−4.972	−11.984	−4.008
d3/d5	1.768	1.620	4.957	4.465
(R5 + R6)/	−0.020	−0.839	−0.041	−0.014
(R5 − R6)
R14/R13	−16.352	−7.395	−2.094	−8.173
f	4.005	4.069	4.095	3.528
f1	−6.780	−8.343	−9.290	−8.539
f2	−17.206	−41.715	−13.978	−12.842
f3	10.699	9.227	11.449	10.363
f4	13.408	17.002	12.119	12.934
f5	8.727	5.205	10.608	10.246
f6	−5.801	−3.739	−8.489	−5.594
f7	19.734	19.169	−3510237.905	14.954
f56	−29.817	−20.232	−49.073	−14.141
FNO	1.508	1.599	1.604	1.600
TTL	30.603	25.956	36.854	38.268
IH	4.626	4.626	4.626	4.626
FOV	140.000	141.800	139.400	154.20

It can be understood by one having ordinary skill in the art that the above-mentioned embodiments are specific embodiments of the present disclosure. In practical applications, various modifications can be made to these embodiments in forms and details without departing from the spirit and scope of the present disclosure.

Claims

1. A camera optical lens, being sequentially from an object side to an image side, comprising: a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, a sixth lens having a negative refractive power, and a seventh lens having a refractive power;wherein, a focal length of the camera optical lens is denoted as f, a total optical length of the camera optical lens is denoted as TTL, a focal length of the first lens is denoted as f1, a focal length of the second lens is denoted as f2, a combined focal length of the fifth lens and the sixth lens is denoted as f56, an on-axis thickness of the second lens is denoted as d3, an on-axis thickness of the third lens is denoted as d5, and the camera optical lens satisfies following relationships: 6.0TTL/f9.00;1.50f2/f15.00;−12.00f56/f−4.00;1.50d3/d55.00.

2. The camera optical lens according to claim 1, wherein a center curvature radius of an object side surface of the third lens is denoted as R5, a center curvature radius of an image side surface of the third lens is denoted as R6, and the camera optical lens satisfies a following relationship: 1.00<(R5+R6)/(R5−R6)0.

3. The camera optical lens according to claim 1, wherein a center curvature radius of the object side surface of the seventh lens is denoted as R13, a center curvature radius of the image side surface of the seventh lens is denoted as R14, and the camera optical lens satisfies a following relationship: R14/R13−2.00.

4. The camera optical lens according to claim 1, wherein an object side surface of the first lens is convex in a paraxial region, an image side surface of the first lens is concave in a paraxial region; a focal length of the first lens is denoted as f1, a center curvature radius of the object side surface of the first lens is denoted as R1, a center curvature radius of the image side surface of the first lens is denoted as R2, the on-axis thickness of the first lens is denoted as d1, and the camera optical lens satisfies following relationships: −4.54f1/f−1.13;0.72(R1+R2)/(R1−R2)2.83;0.02d1/TTL0.08.

5. The camera optical lens according to claim 1, wherein an object side surface of the second lens is concave in a paraxial region, an image side surface of the second lens is convex in a paraxial region; a focal length of the second lens is denoted as f2, a center curvature radius of the object side surface of the second lens is denoted as R3, a center curvature radius of the image side surface of the second lens is denoted as R4, an on-axis thickness of the second lens is denoted as d3, and the camera optical lens satisfies following relationships: −20.50f2/f−2.28;−8.21(R3+R4)/(R3−R4)−0.86;0.08d3/TTL0.37.

6. The camera optical lens according to claim 1, wherein an object side surface of the third lens is convex in a paraxial region, an image side surface of the third lens is convex in a paraxial region; a focal length of the third lens is denoted as f3, an on-axis thickness of the third lens is denoted as d5, and the camera optical lens satisfies following relationships: 1.13f3/f4.19;0.03d5/TTL0.16.

7. The camera optical lens according to claim 1, wherein an object side surface of the fourth lens is convex in a paraxial region, an image side surface of the fourth lens is convex in a paraxial region; a focal length of the fourth lens is denoted as f4, the center curvature radius of the object side surface of the fourth lens is denoted as R7, the center curvature radius of the image side surface of the fourth lens is denoted as R8, an on-axis thickness of the fourth lens is denoted as d7, and the camera optical lens satisfies following relationships: 1.48f4/f6.27;−1.03(R7+R8)/(R7−R8)−0.15;0.02d7/TTL0.17.

8. The camera optical lens according to claim 1, wherein an object side surface of the fifth lens is convex in a paraxial region, an image side surface of the fifth lens is convex in a paraxial region; a focal length of the fifth lens is denoted as f5, a center curvature radius of the object side surface of the fifth lens is denoted as R9, a center curvature radius of the image side surface of the fifth lens is denoted as R10, an on-axis thickness of the fifth lens is denoted as d9, and the camera optical lens satisfies following relationships: 0.64f5/f3.89;−0.29(R9+R10)/(R9−R10)0.70;0.03d9/TTL0.13.

9. The camera optical lens according to claim 1, wherein an object side surface of the sixth lens is concave in a paraxial region, an image side surface of the sixth lens is concave in a paraxial region; a focal length of the sixth lens is denoted as f6, a center curvature radius of the object side surface of the sixth lens is denoted as R11, a center curvature radius of the image side surface of the sixth lens is denoted as R12, an on-axis thickness of the sixth lens is denoted as d11, and the camera optical lens satisfies following relationships: −4.15f6/f−0.61;−1.93(R11+R12)/(R11−R12)0.01;0.01d11/TTL0.03.

10. The camera optical lens according to claim 1, a focal length of the seventh lens is denoted as f7, an on-axis thickness of the seventh lens is denoted as d13, and the camera optical lens satisfies following relationships: f7/f1.39;0.05d13/TTL0.32.

11. The camera optical lens according to claim 1, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all made of a glass material.