Camera optical lens comprising seven lenses of +--++--, ++-+++- or ++--++- refractive powers

Abstract

The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens made of a plastic material; a second lens made of a plastic material; a third lens made of a plastic material; a fourth lens made of a plastic material; a fifth lens made of a plastic material; a sixth lens made of a glass material; and a seventh lens made of a plastic material. The camera optical lens satisfies following conditions: 1.51≤f1/f≤2.50; 1.70≤n6≤2.20; −2.00≤f3/f4≤2.00; 0.00≤(R13+R14)/(R13−R14)≤10.00; and 0.015≤d11/TTL≤0.200. The camera optical lens can achieve a high imaging performance while obtaining a low TTL.

Description

TECHNICAL FIELD

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

BACKGROUND

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but in general the photosensitive devices of camera lens are nothing more than Charge Coupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor (CMOS sensor), and as the progress of the semiconductor manufacturing technology makes the pixel size of the photosensitive devices become smaller, plus the current development trend of electronic products towards better functions and thinner and smaller dimensions, miniature camera lenses with good imaging quality therefore have become a mainstream in the market. In order to obtain better imaging quality, the lens that is traditionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure. Also, with the development of technology and the increase of the diverse demands of users, and as the pixel area of photosensitive devices is becoming smaller and smaller and the requirement of the system on the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structures gradually appear in lens designs. There is an urgent need for ultra-thin, wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 1 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 in accordance with Embodiment 2 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 in accordance with Embodiment 3 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; and

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

DESCRIPTION OF EMBODIMENTS

The present disclosure will hereinafter be described in detail with reference to several exemplary embodiments. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiments. It should be understood the specific embodiments described hereby is only to explain the disclosure, not intended to limit the disclosure.

Embodiment 1

Referring to FIG. 1, the present disclosure provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment 1 of the present disclosure. The camera optical lens 10 includes 7 lenses. Specifically, the camera optical lens 10 includes, from an object side to an image side, 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 can be arranged between the seventh lens L7 and an image plane Si.

The first lens L1 is made of a plastic material, the second lens L2 is made of a plastic material, the third lens L3 is made of a plastic material, the fourth lens L4 is made of a plastic material, the fifth lens L5 is made of a plastic material, the sixth lens L6 is made of a glass material, and the seventh lens L7 is made of a plastic material.

Here, a focal length of the camera optical lens 10 is defined as f, and a focal length of the first lens L1 is defined as f1. The camera optical lens 10 should satisfy a condition of 1.51≤f1/f≤2.50, which specifies a ratio of the focal length f1 of the first lens L1 and the focal length f of the camera optical lens 10. If the lower limit of the specified value is exceeded, although it would facilitate development of ultra-thin lenses, the positive refractive power of the first lens L1 will be too strong, and thus it is difficult to correct the problem like an aberration and it is also unfavorable for development of wide-angle lenses. On the contrary, if the upper limit of the specified value is exceeded, the positive refractive power of the first lens L1 would become too weak, and it is then difficult to develop ultra-thin lenses. Preferably, 1.52≤f1/f≤2.31.

A refractive index of the sixth lens L6 is defined as n6, where 1.70≤n6≤2.20, which specifies the refractive index of the sixth lens L6. The refractive index within this range facilitates development of ultra-thin lenses, and also facilitates correction of the aberration. Preferably, 1.79≤n6≤2.20.

A focal length of the third lens L3 is defined as f3, and a focal length of the fourth lens L4 is defined as f4. The camera optical lens 10 should satisfy a condition of −2.00≤f3/f4≤2.00, which specifies a ratio of the focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably,−2.01≤f3/f4≤1.50.

A curvature radius of an object side surface of the seventh lens L7 is defined as R13, and a curvature radius of an image side surface of the seventh lens L7 is defined as R14. The camera optical lens 10 further satisfies a condition of 0.00≤(R13+R14)/(R13−R14)≤10.00, which specifies a shape of the seventh lens L7. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem like an off-axis aberration. Preferably, 0.26≤(R13+R14)/(R13−R14)≤5.51.

An on-axis thickness of the sixth lens L6 is defined as d11. A total optical length from an object side surface of the first lens L1 to an image plane of the camera optical lens 10 along an optic axis is defined as a total optical length TTL. The camera optical lens 10 further satisfies a condition of 0.015≤d11/TTL≤0.200, which specifies a ratio of the on-axis thickness of the sixth lens L6 and the TTL of the camera optical lens 10. This facilitates achieving ultra-thin lenses. Preferably, 0.03≤d11/TTL≤0.175.

When the focal length of the camera optical lens, the focal length of the first lens, the focal length of the third lens, the focal length of the fourth lens, the refractive index of the sixth lens, the on-axis thickness of the sixth lens, the TTL, the curvature radius of the object side surface of the seventh lens and the curvature radius of the image side surface of the seventh lens satisfy the above conditions, and the camera optical lens will have the advantage of high performance and satisfy the design requirement of a low TTL.

In this embodiment, the 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 the paraxial region, and the first lens L1 has a positive refractive power.

A curvature radius of the object side surface of the first lens L1 is defined as R1, and a curvature radius of the image side surface of the first lens L1 is defined as R2. The camera optical lens 10 further satisfies a condition of −5.79≤(R1+R2)/(R1−R2)≤−1.53. This can reasonably control a shape of the first lens L1 in such a manner that the first lens L1 can effectively correct a spherical aberration of the camera optical lens. Preferably,−3.62≤(R1+R2)/(R1−R2)≤−1.92.

An on-axis thickness of the first lens L1 is defined as d1. The camera optical lens 10 further satisfies a condition of 0.04≤d1/TTL≤0.15. This facilitates achieving ultra-thin lenses. Preferably, 0.06≤d1/TTL≤0.12.

In this embodiment, an object side surface of the second lens L2 is convex in the paraxial region, and an image side surface of the second lens L2 is concave in the paraxial region.

A focal length of the second lens L2 is f2. The camera optical lens 10 further satisfies a condition of −13.33≤f2/f≤980.98. By controlling the negative refractive power of the second lens L2 within the reasonable range, correction of the aberration of the optical system can be facilitated. Preferably,−8.33≤f2/f≤784.78.

A curvature radius of the object side surface of the second lens L2 is defined as R3, and a curvature radius of the image side surface of the second lens L2 is defined as R4. The camera optical lens 10 further satisfies a condition of −25.75≤(R3+R4)/(R3−R4)≤55.43, which specifies a shape of the second lens L2. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem of the aberration. Preferably,−16.09≤(R3+R4)/(R3−R4)≤44.35.

An on-axis thickness of the second lens L2 is defined as d3. The camera optical lens 10 further satisfies a condition of 0.03≤d3/TTL≤0.12. This facilitates achieving ultra-thin lenses. Preferably, 0.04≤d3/TTL≤0.10.

In this embodiment, an object side surface of the third lens L3 is concave in the paraxial region, an image side surface of the third lens L3 is convex in the paraxial region, and the third lens L3 has a negative refractive power.

A focal length of the third lens L3 is f3. The camera optical lens 10 further satisfies a condition of −13.46≤f3/f≤−3.12. When the condition is satisfied, the field curvature of the system can be effectively balanced for further improving the image quality. Preferably,−8.41≤f3/f≤−3.90.

A curvature radius of the object side surface of the third lens L3 is defined as R5, and a curvature radius of the image side surface of the third lens L3 is defined as R6. The camera optical lens 10 further satisfies a condition of −11.25≤(R5+R6)/(R5−R6)≤−2.63. This can effectively control a shape of the third lens L3, thereby facilitating shaping of the third lens L3 and avoiding bad shaping and generation of stress due to the overly large surface curvature of the third lens L3. Preferably,−7.03≤(R5+R6)/(R5−R6)≤−3.29.

An on-axis thickness of the third lens L3 is defined as d5. The camera optical lens 10 further satisfies a condition of 0.02≤d5/TTL≤0.06. This facilitates achieving ultra-thin lenses. Preferably, 0.03≤d5/TTL≤0.05.

In this embodiment, an object side surface of the fourth lens L4 is convex in the paraxial region.

A focal length of the fourth lens L4 is f4. The camera optical lens 10 further satisfies a condition of −13.46≤f4/f≤5.40. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably,−8.41≤f4/f≤4.32.

A curvature radius of the object side surface of the fourth lens L4 is defined as R7, and a curvature radius of an image side surface of the fourth lens L4 is defined as R8. The camera optical lens 10 further satisfies a condition of −2.33≤(R7+R8)/(R7−R8)≤3.59, which specifies a shape of the fourth lens L4. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem like an off-axis aberration. Preferably,−1.46≤(R7+R8)/(R7−R8)≤2.87.

An on-axis thickness of the fourth lens L4 is defined as d7. The camera optical lens 10 further satisfies a condition of 0.04≤d7/TTL≤0.13. This facilitates achieving ultra-thin lenses. Preferably, 0.07≤d7/TTL≤0.11.

In this embodiment, an image side surface of the fifth lens L5 is convex in the paraxial region, and the fifth lens L5 has a positive refractive power.

A focal length of the fifth lens L5 is f5. The camera optical lens 10 further satisfies a condition of 0.25≤f5/f≤0.77. This can effectively make a light angle of the camera lens gentle and reduce the tolerance sensitivity. Preferably, 0.40≤f5/f≤0.62.

A curvature radius of an object side surface of the fifth lens L5 is defined as R9, and a curvature radius of the image side surface of the fifth lens L5 is defined as R10. The camera optical lens 10 further satisfies a condition of 0.48≤(R9+R10)/(R9−R10)≤1.56, which specifies a shape of the fifth lens L5. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem like an off-axis aberration. Preferably, 0.77≤(R9+R10)/(R9−R10)≤1.24.

An on-axis thickness of the fifth lens L5 is defined as d9. The camera optical lens 10 further satisfies a condition of 0.07≤d9/TTL≤0.23. This facilitates achieving ultra-thin lenses. Preferably, 0.12≤d9/TTL≤0.18.

In this embodiment, an object side surface of the sixth lens L6 is concave in the paraxial region, and an image side surface of the sixth lens L6 is convex in the paraxial region.

A focal length of the sixth lens L6 is f6. The camera optical lens 10 further satisfies a condition of −23.57≤f6/f≤7010.57. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably,−14.73≤f6/f≤5608.45.

A curvature radius of the object side surface of the sixth lens L6 is defined as R11, and a curvature radius of the image side surface of the sixth lens L6 is defined as R12. The camera optical lens 10 further satisfies a condition of −112.14≤(R11+R12)/(R11−R12)≤54.62, which specifies a shape of the sixth lens L6. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem like an off-axis aberration. Preferably,−70.09≤(R11+R12)/(R11−R12)≤43.69.

A thickness on-axis of the sixth lens L6 is defined as d11. The camera optical lens 10 further satisfies a condition of 0.03≤d11/TTL≤0.22. This facilitates achieving ultra-thin lenses. Preferably, 0.05≤d11/TTL≤0.18.

In this embodiment, an image side surface of the seventh lens L7 is concave in the paraxial region, and the seventh lens L7 has a negative refractive power.

A focal length of the seventh lens L7 is P. The camera optical lens 10 further satisfies a condition of −1.12≤f7/f≤−0.30. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably,−0.70≤f7/f≤−0.38.

An on-axis thickness of the seventh lens L7 is defined as d13. The camera optical lens 10 further satisfies a condition of 0.02≤d13/TTL≤0.08. This facilitates achieving ultra-thin lenses. Preferably, 0.04≤d13/TTL≤0.06.

In this embodiment, the total optical length TTL of the camera optical lens 10 is smaller than or equal to 6.34 mm, which is beneficial for achieving ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is smaller than or equal to 6.05 mm.

In this embodiment, an F number of the camera optical lens 10 is smaller than or equal to 1.83. The camera optical lens 10 has a large F number and a better imaging performance. Preferably, the F number of the camera optical lens 10 is smaller than or equal to 1.80.

With such design, the total optical length TTL of the camera optical lens 10 can be made as short as possible, and thus the miniaturization characteristics can be maintained.

In the following, examples will be used to describe the camera optical lens 10 of the present disclosure. The symbols recorded in each example will be described as follows. The focal length, on-axis distance, curvature radius, on-axis thickness, inflexion point position, and arrest point position are all in units of mm.

TTL: Optical length (a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis) in mm.

Preferably, inflexion points and/or arrest points can be arranged on the object side surface and/or image side surface of the lens, so as to satisfy the demand for the high quality imaging. The description below can be referred to for specific implementations.

The design information of the camera optical lens 10 in Embodiment 1 of the present disclosure is shown in Tables 1 and 2.

TABLE 1
	R	d	nd	ν d
S1	∞	d0 =	−0.330
R1	2.163	d1 =	0.571	nd1	1.5438	ν 1	56.03
R2	5.494	d2 =	0.068
R3	3.878	d3 =	0.392	nd2	1.6610	ν 2	20.53
R4	3.060	d4 =	0.496
R5	−4.876	d5 =	0.209	nd3	1.6610	ν 3	20.53
R6	−6.985	d6 =	0.034
R7	7.046	d7 =	0.490	nd4	1.5438	v 4	56.03
R8	−264.433	d8 =	0.525
R9	−60.511	d9 =	0.876	nd5	1.5438	ν 5	56.03
R10	−1.113	d10 =	0.036
R11	−6.310	d11 =	0.358	nd6	1.8727	ν 6	23.25
R12	−7.628	d12 =	0.279
R13	−4.252	d13 =	0.311	nd7	1.5438	ν 7	56.03
R14	1.336	d14 =	0.500
R15	∞	d15 =	0.210	ndg	1.5168	ν g	64.17
R16	∞	d16 =	0.405

In the table, meanings of various symbols will be described as follows.

• • S1: aperture;
  • R: curvature radius of an optical surface, a central curvature radius for a lens;
  • R1: curvature radius of the object side surface of the first lens L1;
  • R2: curvature radius of the image side surface of the first lens L1;
  • R3: curvature radius of the object side surface of the second lens L2;
  • R4: curvature radius of the image side surface of the second lens L2;
  • R5: curvature radius of the object side surface of the third lens L3;
  • R6: curvature radius of the image side surface of the third lens L3;
  • R7: curvature radius of the object side surface of the fourth lens L4;
  • R8: curvature radius of the image side surface of the fourth lens L4;
  • R9: curvature radius of the object side surface of the fifth lens L5;
  • R10: curvature radius of the image side surface of the fifth lens L5;
  • R11: curvature radius of the object side surface of the sixth lens L6;
  • R12: curvature radius of the image side surface of the sixth lens L6;
  • R13: curvature radius of the object side surface of the seventh lens L7;
  • R14: curvature radius of the image side surface of the seventh lens L7;
  • R15: curvature radius of an object side surface of the optical filter GF;
  • R16: curvature radius of an image side surface of the optical filter GF;
  • d: on-axis thickness of a lens and an on-axis distance between lenses;
  • d0: on-axis distance from the aperture S1 to the object side surface of the first lens L1;
  • d1: on-axis thickness of the first lens L1;
  • d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;
  • d3: on-axis thickness of the second lens L2;
  • d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;
  • d5: on-axis thickness of the third lens L3;
  • d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;
  • d7: on-axis thickness of the fourth lens L4;
  • d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;
  • d9: on-axis thickness of the fifth lens L5;
  • d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;
  • d11: on-axis thickness of the sixth lens L6;
  • d12: on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;
  • d13: on-axis thickness of the seventh lens L7;
  • d14: on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF;
  • d15: on-axis thickness of the optical filter GF;
  • d16: on-axis distance from the image side surface of the optical filter GF to the image plane;
  • nd: refractive index of d line;
  • nd1: refractive index of d line of the first lens L1;
  • nd2: refractive index of d line of the second lens L2;
  • nd3: refractive index of d line of the third lens L3;
  • nd4: refractive index of d line of the fourth lens L4;
  • nd5: refractive index of d line of the fifth lens L5;
  • nd6: refractive index of d line of the sixth lens L6;
  • nd7: refractive index of d line of the seventh lens L7;
  • ndg: refractive index of d line of the optical filter GF;
  • 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;

vg: abbe number of the optical filter GF.

Table 2 shows aspherical surface data of the camera optical lens 10 in Embodiment 1 of the present disclosure.

TABLE 2
	Conic
	coefficient	Aspherical surface coefficients
	k	A4	A6	A8	A10	A12	A14	A16
R1	−8.3590E−02	1.1053E−02	6.0047E−03	−1.8777E−03	1.6003E−03	1.9599E−03	5.7286E−04	−9.7705E−04
R2	−8.4713E+01	−4.4455E−03	1.8224E−03	5.0208E−03	−9.4957E−04	−4.7216E−03	−1.3050E−03	1.5270E−03
R3	−2.3656E+01	−2.8018E−02	−7.1284E−03	2.6912E−03	−3.7667E−03	1.1296E−03	−2.1904E−04	8.4268E−04
R4	−4.0229E+00	−6.5252E−03	−1.2712E−02	−1.0869E−03	−1.4324E−03	4.7019E−04	3.9746E−04	4.1805E−03
R5	1.6383E+01	−6.7500E−03	−4.2190E−02	−2.4444E−02	3.1314E−04	3.8525E−03	−5.9893E−03	1.4913E−03
R6	2.3732E+01	−7.1542E−03	−3.6143E−02	−5.3612E−03	5.5801E−03	4.1053E−03	5.4795E−04	−2.4571E−03
R7	7.5495E+00	−6.2764E−02	1.1203E−02	3.4762E−03	−3.4135E−04	−1.8670E−04	6.9992E−05	−2.3452E−05
R8	8.9368E+01	−6.3459E−02	1.8490E−03	−2.7993E−04	−1.0561E−03	−2.3173E−04	1.7931E−04	1.4989E−04
R9	−7.7696E+01	−3.0765E−02	1.8468E−03	1.7306E−03	−1.2467E−03	−1.3578E−04	3.5246E−05	1.1000E−05
R10	−3.8261E+00	−5.7223E−02	1.8554E−02	−1.9660E−04	−1.8741E−04	−4.6606E−05	3.1382E−06	−2.9339E−06
R11	2.8756E+00	−1.2353E−02	1.0155E−04	1.0505E−04	9.4233E−06	2.6515E−06	6.4006E−07	−1.7202E−08
R12	−2.7044E+01	−1.1017E−02	2.2877E−04	3.9649E−05	3.3702E−06	−8.0932E−07	−2.1171E−08	7.5742E−08
R13	1.3353E−01	−5.7568E−04	2.4355E−03	1.6024E−05	−1.5242E−05	−7.9868E−07	2.5649E−10	4.8266E−09
R14	−8.2874E+00	−2.0294E−02	3.8081E−03	−4.6906E−04	1.9741E−05	9.0250E−07	−1.9494E−09	−6.8118E−09

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14 and A16 are aspheric surface coefficients.

IH: Image Heighty=(x²/R)/[1+{1−(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶  (1)

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

Table 3 and Table 4 show design data of inflexion points and arrest points of respective lens in the camera optical lens 10 according to Embodiment 1 of the present disclosure. P1R1 and P1R2 represent the object side surface and the image side surface of the first lens L1, respectively, P2R1 and P2R2 represent the object side surface and the image side surface of the second lens L2, respectively, P3R1 and P3R2 represent the object side surface and the image side surface of the third lens L3, respectively, P4R1 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, respectively, P5R1 and P5R2 represent the object side surface and the image side surface of the fifth lens L5, respectively, P6R1 and P6R2 represent the object side surface and the image side surface of the sixth lens L6, respectively, and P7R1 and P7R2 represent the object side surface and the image side surface of the seventh lens L7, respectively. The data in the column named “inflexion point position” refers to vertical distances from inflexion points arranged on each lens surface to the optic axis of the camera optical lens 10. The data in the column named “arrest point position” refers to vertical distances from arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

	TABLE 3
	Number of	Inflexion point	Inflexion point
	inflexion points	position 1	position 2
	P1R1
	P1R2	1	0.845
	P2R1	2	0.595	1.115
	P2R2
	P3R1
	P3R2
	P4R1	2	0.475	1.095
	P4R2	1	1.325
	P5R1
	P5R2	2	1.265	1.585
	P6R1	1	1.885
	P6R2	1	2.035
	P7R1	2	1.465	2.465
	P7R2	1	0.795

	TABLE 4
	Number of	Arrest point	Arrest point
	arrest points	position 1	position 2
	P1R1
	P1R2	1	1.135
	P2R1	1	1.045
	P2R2
	P3R1
	P3R2
	P4R1	2	0.945	1.205
	P4R2
	P5R1
	P5R2
	P6R1
	P6R2	1	2.395
	P7R1
	P7R2	1	2.285

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 10 according to Embodiment 1, respectively. FIG. 4 illustrates a field curvature and a distortion of light with a wavelength of 588 nm after passing the camera optical lens 10 according to Embodiment 1, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

Table 13 shows various values of Embodiments 1, 2 and 3 and values corresponding to parameters which are specified in the above conditions.

As shown in Table 13, Embodiment 1 satisfies the above conditions.

In this embodiment, the camera optical lens has a pupil entering diameter of 2.88 mm, a full vision field image height of 4.000 mm and a FOV (field of view) of 75.99° in a diagonal direction. Thus, the camera optical lens has a wide-angle and is ultra-thin and its on-axis and off-axis chromatic aberrations are fully corrected, thereby achieving excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 in Embodiment 2 of the present disclosure.

TABLE 5
	R	d	nd	ν d
S1	∞	d0 =	−0.295
R1	2.254	d1 =	0.445	nd1	1.5438	ν 1	56.03
R2	4.916	d2 =	0.041
R3	3.275	d3 =	0.446	nd2	1.6610	ν 2	20.53
R4	3.102	d4 =	0.524
R5	−4.759	d5 =	0.211	nd3	1.6610	ν 3	20.53
R6	−7.994	d6 =	0.030
R7	7.033	d7 =	0.496	nd4	1.5438	ν 4	56.03
R8	91.188	d8 =	0.404
R9	183.530	d9 =	0.847	nd5	1.5438	ν 5	56.03
R10	−1.064	d10 =	0.030
R11	−6.593	d11 =	0.479	nd6	2.0211	ν 6	25.15
R12	−6.832	d12 =	0.216
R13	−7.585	d13 =	0.259	nd7	1.5438	ν 7	56.03
R14	1.129	d14 =	0.700
R15	∞	d15 =	0.210	ndg	1.5168	ν g	64.17
R16	∞	d16 =	0.297

Table 6 shows aspherical surface data of each lens of the camera optical lens 20 in Embodiment 2 of the present disclosure.

TABLE 6
	Conic
	coefficient	Aspherical surface coefficients
	k	A4	A6	A8	A10	A12	A14	A16
R1	5.5270E−02	1.2780E−02	4.3507E−03	−4.1455E−03	1.6819E−03	2.6439E−03	1.3815E−03	−1.2988E−03
R2	−7.2298E+01	−1.5002E−02	−9.5841E−03	1.1065E−02	5.5151E−03	−4.3974E−03	−3.7990E−03	2.2122E−03
R3	−2.4166E+01	−2.4702E−02	−5.5585E−03	−5.1119E−03	−6.7172E−03	7.9981E−03	7.3928E−03	−6.0405E−03
R4	−5.4196E+00	−7.5578E−03	−4.3897E−03	−1.2906E−02	−9.0350E−03	7.1542E−03	5.2103E−03	−2.0702E−03
R5	1.6616E+01	−1.1582E−02	−4.2535E−02	−2.5967E−02	−3.5564E−03	−1.1853E−03	−7.1273E−03	1.4911E−02
R6	2.8542E+01	−9.4250E−03	−3.8284E−02	−6.1358E−03	6.1345E−03	5.1973E−03	1.5560E−03	−1.9998E−03
R7	9.8535E+00	−6.1536E−02	1.1823E−02	3.4815E−03	−4.6510E−04	−1.8675E−04	1.5802E−04	−5.5606E−06
R8	3.3114E+02	−6.4923E−02	1.5296E−03	−4.8403E−04	−1.1248E−03	−2.3106E−04	1.9456E−04	1.6173E−04
R9	−9.9604E+02	−2.8768E−02	−2.6248E−04	1.6661E−03	−1.1939E−03	−1.2053E−04	3.7707E−05	1.1097E−05
R10	−3.7046E+00	−5.7588E−02	1.9187E−02	−1.9218E−04	−1.9960E−04	−4.9583E−05	1.6299E−06	−3.2703E−06
R11	2.6105E+00	−1.1943E−02	1.0144E−04	1.1539E−04	1.1308E−05	3.0093E−06	6.9562E−07	−9.9147E−09
R12	−7.1251E+01	−9.5195E−03	3.2540E−04	4.5822E−05	3.3323E−06	−9.8763E−07	−7.9833E−08	6.2723E−08
R13	1.8012E+00	−4.4358E−03	2.2281E−03	2.0038E−05	−1.3903E−05	−4.6477E−07	9.6954E−09	4.9142E−09
R14	−6.6355E+00	−2.0989E−02	3.8874E−03	−4.6468E−04	1.9964E−05	8.8365E−07	−1.7578E−12	−6.4715E−09

Table 7 and table 8 show design data of inflexion points and arrest points of respective lens in the camera optical lens 20 according to Embodiment 2 of the present disclosure.

	TABLE 7
	Number of
	inflexion	Inflexion point	Inflexion point	Inflexion point
	points	position 1	position 2	position 3
P1R1
P1R2	1	0.605
P2R1	1	0.585
P2R2	2	0.755	1.055
P3R1
P3R2
P4R1	2	0.495	1.025
P4R2	2	0.125	1.315
P5R1	1	0.135
P5R2	2	1.245	1.565
P6R1	1	1.835
P6R2	1	2.015
P7R1	2	1.435	2.785
P7R2	3	0.805	2.615	2.875

	TABLE 8
	Number of arrest points	Arrest point position 1
	P1R1
	P1R2
	P2R1	1	1.075
	P2R2
	P3R1
	P3R2
	P4R1
	P4R2	1	0.205
	P5R1	1	0.215
	P5R2
	P6R1
	P6R2
	P7R1	1	2.155
	P7R2	1	3.015

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 20 according to Embodiment 2. FIG. 8 illustrates a field curvature and a distortion of light with a wavelength of 588 nm after passing the camera optical lens 20 according to Embodiment 2.

As shown in Table 13, Embodiment 2 satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 2.175 mm. The image height of 1.0 H is 3.715 mm. The FOV (field of view) is 82.89°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis chromatic aberrations are fully corrected, thereby achieving excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 9 and Table 10 show design data of a camera optical lens 30 in Embodiment 3 of the present disclosure.

TABLE 9
	R	d	nd	ν d
S1	∞	d0 =	−0.224
R1	2.347	d1 =	0.440	nd1	1.5438	ν 1	56.03
R2	4.822	d2 =	0.030
R3	2.746	d3 =	0.317	nd2	1.6610	ν 2	20.53
R4	3.208	d4 =	0.521
R5	−5.730	d5 =	0.189	nd3	1.6610	ν 3	20.53
R6	−8.841	d6 =	0.050
R7	19.289	d7 =	0.506	nd4	1.5438	ν 4	56.03
R8	7.922	d8 =	0.206
R9	53.207	d9 =	0.837	nd5	1.5438	ν 5	56.03
R10	−1.061	d10 =	0.030
R11	−7.642	d11 =	0.855	nd6	2.1901	ν 6	20.00
R12	−7.233	d12 =	0.174
R13	77.091	d13 =	0.290	nd7	1.5438	ν 7	56.03
R14	1.115	d14 =	0.700
R15	∞	d15 =	0.210	ndg	1.5168	ν g	64.17
R16	∞	d16 =	0.344

Table 10 shows aspherical surface data of each lens of the camera optical lens 30 in Embodiment 3 of the present disclosure.

TABLE 10
	Conic
	coefficient	Aspherical surface coefficients
	k	A4	A6	A8	A10	A12	A14	A16
R1	−2.8993E−01	8.2888E−03	4.3160E−03	−8.7712E−03	−3.8655E−03	2.9293E−05	6.8048E−04	−1.6421E−03
R2	−1.2766E+02	−3.1376E−02	−1.2805E−02	8.3206E−03	1.0296E−03	−6.0229E−03	−2.2867E−03	2.5124E−03
R3	−2.1332E+01	−2.5395E−02	−8.4599E−03	6.7298E−04	4.1552E−03	1.0213E−02	9.0330E−04	−3.4703E−03
R4	−5.0741E+00	−1.1975E−02	−2.3989E−02	−1.0495E−03	1.3867E−02	4.2567E−03	−1.6889E−02	6.5067E−03
R5	2.5846E+01	−5.5153E−02	−4.0602E−02	−2.2601E−02	−9.1547E−03	−7.1068E−03	−3.8785E−03	2.2106E−02
R6	4.0680E+01	−1.1527E−02	−4.2593E−02	−6.6977E−03	6.9643E−03	5.8011E−03	1.6690E−03	−1.2641E−03
R7	1.0495E+02	−5.8505E−02	1.2637E−02	3.5823E−03	−3.2370E−04	2.0070E−05	2.6141E−04	−8.5772E−05
R8	−2.0136E+02	−7.9361E−02	−2.5586E−04	−6.5105E−04	−1.1251E−03	−2.2241E−04	2.0213E−04	1.6857E−04
R9	−6.9293E+02	−4.0611E−02	−3.5582E−03	1.4630E−03	−1.1694E−03	−1.1893E−04	3.9186E−05	1.4129E−05
R10	−3.2924E+00	−6.6617E−02	2.0237E−02	−1.8529E−04	−2.0368E−04	−4.7675E−05	3.2602E−06	−2.1892E−06
R11	1.3529E+00	−1.1090E−02	1.9076E−04	1.3233E−04	1.1893E−05	2.8868E−06	6.5778E−07	−1.3117E−08
R12	−8.9204E+01	−6.4345E−03	2.3158E−04	3.3777E−05	2.2214E−06	−1.1705E−06	−1.1635E−07	5.7775E−08
R13	6.3280E+02	−1.4856E−02	1.8516E−03	3.4359E−05	−1.0394E−05	−1.0025E−07	1.8115E−08	−1.5817E−09
R14	−5.3178E+00	−2.2575E−02	4.0815E−03	−4.8068E−04	1.9509E−05	7.8840E−07	−4.8000E−09	−6.3180E−09

Table 11 and table 12 show design data of inflexion points and arrest points of respective lens in the camera optical lens 30 according to Embodiment 3 of the present disclosure.

	TABLE 11
	Number of
	inflexion	Inflexion point	Inflexion point	Inflexion point
	points	position 1	position 2	position 3
P1R1	1	0.955
P1R2	1	0.425
P2R1	2	0.615	0.825
P2R2	1	0.755
P3R1
P3R2	1	1.115
P4R1	2	0.285	1.025
P4R2	2	0.305	1.335
P5R1	1	0.195
P5R2	2	1.315	1.605
P6R1	1	1.765
P6R2	1	2.055
P7R1	3	0.275	1.825	2.575
P7R2	1	0.845

	TABLE 12
	Number of	Arrest point	Arrest point
	arrest points	position 1	position 2
	P1R1
	P1R2	1	0.795
	P2R1
	P2R2
	P3R1
	P3R2
	P4R1	2	0.505	1.245
	P4R2	1	0.535
	P5R1	1	0.335
	P5R2
	P6R1
	P6R2
	P7R1	1	0.485
	P7R2	1	2.425

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 30 according to Embodiment 3. FIG. 12 illustrates field curvature and distortion of light with a wavelength of 588 nm after passing the camera optical lens 30 according to Embodiment 3.

Table 13 in the following lists values corresponding to the respective conditions in this embodiment in order to satisfy the above conditions. The camera optical lens according to this embodiment satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 2.090 mm. The image height of 1.0 H is 3.715 mm. The FOV (field of view) is 85.18°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis chromatic aberrations are fully corrected, thereby achieving excellent optical characteristics.

TABLE 13
Parameters and
conditions	Embodiment 1	Embodiment 2	Embodiment 3
f	4.065	3.872	3.720
f1	6.188	7.207	7.885
f2	−27.104	2531.931	22.418
f3	−25.428	−18.111	−25.031
f4	12.628	13.939	−25.035
f5	2.073	1.943	1.917
f6	−47.915	18094.454	53.194
f7	−1.833	−1.782	−2.076
Fno	1.78	1.78	1.78
f3/f4	−2.01	−1.30	1.00
f1/f	1.52	1.86	2.12
(R13 + R14)/	0.52	0.74	1.03
(R13 − R14)
d11/TTL	0.06	0.09	0.15

It can be appreciated by one having ordinary skill in the art that the description above is only embodiments of the present disclosure. In practice, one having ordinary skill in the art can make various modifications to these embodiments in forms and details without departing from the spirit and scope of the present disclosure.

Claims

1. A camera optical lens, comprising, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the third lens has a negative refractive power, and comprises an object side surface being concave in a paraxial region and an image side surface being convex in the paraxial region,wherein the camera optical lens satisfies following conditions:1.51≤f1/f≤2.50;1.70≤n6≤2.20;−2.00≤f3/f4≤2.00;0.00≤(R13+R14)/(R13−R14)≤10.00;0.015≤d11/TTL≤0.200;−13.46≤f3/f≤−3.12;−11.25≤(R5+R6)/(R5−R6)≤−2.63; and0.02≤d5/TTL≤0.06,whereR5 denotes a curvature radius of the object side surface of the third lens;R6 denotes a curvature radius of the image side surface of the third lens;d5 denotes an on-axis thickness of the third lens;f denotes a focal length of the camera optical lens;f1 denotes a focal length of the first lens;f3 denotes a focal length of the third lens;f4 denotes a focal length of the fourth lens;n6 denotes a refractive index of the sixth lens;d11 denotes an on-axis thickness of the sixth lens;TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis;R13 denotes a curvature radius of an object side surface of the seventh lens; andR14 denotes a curvature radius of an image side surface of the seventh lens.

2. The camera optical lens as described in claim 1, wherein the first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of plastic material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, the sixth lens is made of glass material and the seventh lens made of a plastic material.

3. The camera optical lens as described in claim 1, further satisfying following conditions: 1.52≤f1/f≤2.31;1.79≤n6≤2.20;−2.01≤f3/f4≤1.50;0.26≤(R13+R14)/(R13−R14)≤5.51; and0.039≤d11/TTL≤0.175.

4. The camera optical lens as described in claim 1, wherein the first lens has a positive refractive power, the object side surface of the first lens is convex in a paraxial region and an image side surface of the first lens is concave in the paraxial region, and the camera optical lens further satisfies following conditions:−5.79≤(R1+R2)/(R1−R2)≤−1.53; and0.04≤d1/TTL≤0.15,whereR1 denotes a curvature radius of the object side surface of the first lens;R2 denotes a curvature radius of the image side surface of the first lens; andd1 denotes an on-axis thickness of the first lens.

5. The camera optical lens as described in claim 4, further satisfying following conditions: −3.62≤(R1+R2)/(R1−R2)≤−1.92; and0.06≤d1/TTL≤0.12.

6. The camera optical lens as described in claim 1, wherein the second lens comprises an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region, and the camera optical lens further satisfies following conditions:−13.33≤f2/f≤980.98;−25.75≤(R3+R4)/(R3−R4)≤55.43; and0.03≤d3/TTL≤0.12,wheref2 denotes a focal length of the second lens;R3 denotes a curvature radius of the object side surface of the second lens;R4 denotes a curvature radius of the image side surface of the second lens; andd3 denotes an on-axis thickness of the second lens.

7. The camera optical lens as described in claim 6, further satisfying following conditions: −8.33≤f2/f≤784.78;−16.09≤(R3+R4)/(R3−R4)≤44.35; and0.04≤d3/TTL≤0.10.

8. The camera optical lens as described in claim 1, further satisfying following conditions: −8.41≤f3/f≤−3.90;−7.03≤(R5+R6)/(R5−R6)≤−3.29; and0.03≤d5/TTL≤0.05.

9. The camera optical lens as described in claim 1, wherein the fourth lens comprises an object side surface being convex in a paraxial region, and the camera optical lens further satisfies following conditions:−13.46≤f4/f≤5.40;−2.33≤(R7+R8)/(R7−R8)≤3.59; and0.04≤d7/TTL≤0.13,whereR7 denotes a curvature radius of the object side surface of the fourth lens;R8 denotes a curvature radius of an image side surface of the fourth lens; andd7 denotes an on-axis thickness of the fourth lens.

10. The camera optical lens as described in claim 9, further satisfying following conditions: −8.41≤f4/f≤4.32;−1.46≤(R7+R8)/(R7−R8)≤2.87; and0.07≤d7/TTL≤0.11.

11. The camera optical lens as described in claim 1, wherein the fifth lens has a positive refractive power, and comprises an image side surface being convex in a paraxial region, and the camera optical lens further satisfies following conditions:0.25≤f5/f≤0.77;0.48≤(R9+R10)/(R9−R10)≤1.56; and0.07≤d9/TTL≤0.23,wheref5 denotes a focal length of the fifth lens;R9 denotes a curvature radius of an object side surface of the fifth lens;R10 denotes a curvature radius of the image side surface of the fifth lens; andd9 denotes an on-axis thickness of the fifth lens.

12. The camera optical lens as described in claim 11, further satisfying following conditions: 0.40≤f5/f≤0.62;0.77≤(R9+R10)/(R9−R10)≤1.24; and0.12≤d9/TTL≤0.18.

13. The camera optical lens as described in claim 1, wherein the sixth lens comprises an object side surface being concave in a paraxial region and an image side surface being convex in the paraxial region, and the camera optical lens further satisfies following conditions:−23.57≤f6/f≤7010.57;−112.14≤(R11+R12)/(R11−R12)≤54.62; and0.03≤d11/TTL≤0.22,wheref6 denotes a focal length of the sixth lens;R11 denotes a curvature radius of the object side surface of the sixth lens; andR12 denotes a curvature radius of the image side surface of the sixth lens.

14. The camera optical lens as described in claim 13, further satisfying following conditions: −14.73≤f6/f≤5608.45;−70.09≤(R11+R12)/(R11−R12)≤43.69; and0.05≤d11/TTL≤0.18.

15. The camera optical lens as described in claim 1, wherein the seventh lens has a negative refractive power, the image side surface of the seventh lens is concave in a paraxial region, and the camera optical lens further satisfies following conditions:−1.12≤f7/f≤−0.30; and0.02≤d13/TTL≤0.08,wheref7 denotes a focal length of the seventh lens; andd13 denotes an on-axis thickness of the seventh lens.

16. The camera optical lens as described in claim 15, further satisfying following conditions: −0.70≤f7/f≤−0.38; and0.04≤d13/TTL≤0.06.

17. The camera optical lens as described in claim 1, wherein the total optical length TTL of the camera optical lens is smaller than or equal to 6.34 mm.

18. The camera optical lens as described in claim 17, wherein the total optical length TTL of the camera optical lens is smaller than or equal to 6.05 mm.

19. The camera optical lens as described in claim 1, wherein an F number of the camera optical lens is smaller than or equal to 1.83.