Camera optical lens

Abstract

The present disclosure discloses a camera optical lens. The camera optical lens including, in an order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens further satisfies specific conditions.

Description

FIELD OF THE PRESENT DISCLOSURE

The present disclosure relates to optical lens, in particular to a camera optical lens suitable for handheld devices such as smart phones and digital cameras and imaging devices.

DESCRIPTION OF RELATED ART

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but the photosensitive devices of general camera lens are no other 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 shrink, coupled with the current development trend of electronic products being that their functions should be better and their shape should be thin and small, miniature camera lens with good imaging quality therefor has 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. And, with the development of technology and the increase of the diverse demands of users, and under this circumstances that the pixel area of photosensitive devices is shrinking steadily and the requirement of the system for the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structure gradually appear in lens design. There is an urgent need for ultra-thin wide-angle camera lenses which have good optical characteristics and the chromatic aberration of which is fully corrected.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the exemplary embodiments can be better understood with reference to the following drawings. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure.

FIG. 1 is a schematic diagram of a camera optical lens in accordance with a first embodiment of the present invention;

FIG. 2 shows the longitudinal aberration of the camera optical lens shown in FIG. 1;

FIG. 3 shows the lateral color of the camera optical lens shown in FIG. 1;

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

FIG. 5 is a schematic diagram of a camera optical lens in accordance with a second embodiment of the present invention;

FIG. 6 presents the longitudinal aberration of the camera optical lens shown in FIG. 5;

FIG. 7 presents the lateral color of the camera optical lens shown in FIG. 5;

FIG. 8 presents the field curvature and distortion of the camera optical lens shown in FIG. 5

FIG. 9 is a schematic diagram of a camera optical lens in accordance with a third embodiment of the present invention;

FIG. 10 presents the longitudinal aberration of the camera optical lens shown in FIG. 9;

FIG. 11 presents the lateral color of the camera optical lens shown in FIG. 9;

FIG. 12 presents the field curvature and distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF THE EXEMPLARY 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

As referring to FIG. 1, the present invention provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 of embodiment 1 of the present invention, the camera optical lens 10 comprises 7 lenses. Specifically, from the object side to the image side, the camera optical lens 10 comprises in sequence: 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. Optical element like optical filter GF can be arranged between the seventh lens L7 and the image surface Si. The first lens L1 is made of plastic material, the second lens L2 is made of plastic material, the third lens L3 is made of plastic material, the fourth lens L4 is made of glass material, the fifth lens L5 is made of plastic material, the sixth lens L6 is made of plastic material, the seventh lens L7 is made of plastic material;

Here, the focal length of the whole camera optical lens is defined as f, the focal length of the first lens L1 is defined as f1, the focal length of the third lens L3 is defined as f3, the focal length of the fourth lens L4 is defined as f4, the refractive power of the fourth lens L4 is defined as n4, the thickness on-axis of the fourth lens L4 is defined as d7, the total optical length of the camera optical lens is defined as TTL, the curvature radius of the object side surface of the seventh lens L7 is defined as R13, the curvature radius of the image side surface of the seventh lens L7 is defined as R14. The f, f1, f3, f4, n4, d7, TTL, R13 and R14 satisfy the following conditions: 1.05≤f1/f≤1.5, 1.7≤n4≤2.2, −2≤f3/f4≤2; −10≤(R13+R14)/(R13−R14)≤10; 0.01≤d7/TTL≤0.1.

Condition 1.05≤f1/f≤1.5 fixes the positive refractive power of the first lens L1. If the lower limit of the set value is exceeded, although it benefits the ultra-thin development of lenses, but the positive refractive power of the first lens L1 will be too strong, problem like aberration is difficult to be corrected, and it is also unfavorable for wide-angle development of lens. On the contrary, if the higher limit of the set value is exceeded, the positive refractive power of the first lens L1 becomes too weak, it is then difficult to develop ultra-thin lenses. Preferably, the following condition shall be satisfied, 1.05≤f1/f≤1.2.

Condition 1.7≤n4≤2.2 fixes the refractive power of the fourth lens L4, refractive power within this range benefits the ultra-thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be satisfied, 1.7≤n4≤1.9.

Condition −2≤f3/f4≤2 fixes the ratio between the focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4, a ratio within this range can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the following condition shall be satisfied, −2≤f3/f4≤−0.5.

Condition −10≤(R13+R14)/(R13−R14)≤10 fixes the shape of the seventh lens L7, when the value is beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the following condition shall be satisfied, −2≤(R13+R14)/(R13−R14)≤0.

Condition 0.01≤d7/TTL≤0.1 fixes the ratio between the thickness on-axis of the fourth lens L4 and the total optical length TTL of the camera optical lens 10, a ratio within this range benefits ultra-thin development of lenses. Preferably, the following condition shall be satisfied, 0.04≤d7/TTL≤0.085.

When the focal length of the camera optical lens 10 of the present invention, the focal length of each lens, the refractive power of the related lens, and the total optical length, the thickness on-axis and the curvature radius of the camera optical lens satisfy the above conditions, the camera optical lens 10 has the advantage of high performance and satisfies the design requirement of low TTL.

In this embodiment, the object side surface of the first lens L1 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has positive refractive power; the focal length of the whole camera optical lens is f, the focal length of the first lens L1 is f1, the curvature radius of the object side surface of the first lens L1 is R1, the curvature radius of the image side surface of the first lens L1 is R2 and the thickness on-axis of the first lens L1 is d1, they satisfy the following condition: −3.47≤(R1+R2)/(R1−R2)≤−1.04, this condition reasonably controls the shape of the first lens, then the first lens can effectively correct the spherical aberration of the system; if the condition 0.29≤d1≤1.03 is satisfied it is beneficial for the realization of ultra-thin lens. Preferably, the following condition shall be satisfied, −2.17≤(R1+R2)/(R1−R2)≤−1.3; 0.47≤d1≤0.82.

In this embodiment, the object side surface of the second lens L2 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the second lens L2 is f2, the curvature radius of the object side surface of the second lens L2 is R3, the curvature radius of image side surface of the second lens L2 is R4 and the thickness on-axis of the second lens L2 is d3, they satisfy the following condition: when the condition −9.00≤f2/f≤−2.31 is satisfied, the negative refractive power of the second lens L2 is controlled within reasonable scope, the spherical aberration caused by the first lens L1 which has positive refractive power and the field curvature of the system then can be reasonably and effectively balanced; the condition 2.19≤(R3+R4)/(R3−R4)≤8.61 fixes the shape of the second lens L2, when value is beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like on-axis chromatic aberration is difficult to be corrected; if the condition 0.11≤d3≤0.53 is satisfied, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied, −5.63≤f2/f≤−2.89; 3.51≤(R3+R4)/(R3−R4)≤6.89; 0.18≤d3≤0.42.

In this embodiment, the object side surface of the third lens L3 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has a negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the third lens L3 is f3, the curvature radius of the object side surface of the third lens L3 is R5, the curvature radius of the image side surface of the third lens L3 is R6 and the thickness on-axis of the third lens L3 is d5, they satisfy the condition: −10.52≤f3/f≤−2.81, by satisfying this condition, it is helpful for the system to obtain good ability in balancing the field curvature, so that the image quality can be effectively improved; by satisfying the condition −8.90≤(R5+R6)/(R5−R6)≤−2.27 the shape of the third lens L3 can be effectively controlled, it is beneficial for the shaping of the third lens L3 and bad shaping and stress generation due to extra large curvature of surface of the third lens 13 can be avoided; when the condition 0.10≤d5≤0.33 is satisfied, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied, −6.58≤f3/f≤−3.51; −5.56≤(R5+R6)/(R5−R6)≤−2.84; 0.17≤d5≤0.27.

In this embodiment, the object side surface of the fourth lens L4 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has a positive refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the fourth lens L4 is f4, the curvature radius of the object side surface of the fourth lens L4 is R7, the curvature radius of the image side surface of the fourth lens L4 is R8 and the thickness on-axis of the fourth lens L4 is d7, they satisfy the condition: 1.46≤f4/f≤4.49, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition −3.87≤(R7+R8)/(R7−R8)≤−0.86 fixes the shape of the fourth lens L4, when beyond this range, with the development into the direction of ultra-thin and wide-angle lens, the problem like chromatic aberration is difficult to be corrected; when the condition 0.14≤d7≤0.67 is satisfied, it is beneficial for realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied, 2.34≤f4/f≤3.60; −2.42≤(R7+R8)/(R7−R8)≤−1.07; 0.22≤d7≤0.54.

In this embodiment, the object side surface of the fifth lens L5 is a concave surface relative to the proximal axis, its image side surface is a convex surface relative to the proximal axis, and it has positive refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the fifth lens L5 is f5, the curvature radius of the object side surface of the fifth lens L5 is R9, the curvature radius of the image side surface of the fifth lens L5 is R10 and the thickness on-axis of the fifth lens L5 is d9, they satisfy the condition: 0.32≤f5/f≤0.97, the limitation on the fifth lens L5 can effectively make the light angle of the camera lens flat and the tolerance sensitivity reduces; the condition 0.55≤(R9+R10)/(R9−R10)≤1.79 fixes the shape of the fifth lens L5, when beyond this range, with the development into the direction of ultra-thin and wide-angle lens, the problem like off-axis chromatic aberration is difficult to be corrected; when the condition 0.32≤d9≤1.17 is satisfied, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied, 0.51≤f5/f≤0.88≤(R9+R10)/(R9−R10)≤1.43; 0.52≤d9≤0.93.

In this embodiment, the object side surface of the sixth lens L6 is a concave surface relative to the proximal axis, its image side surface is a convex surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the sixth lens L6 is f6, the curvature radius of the object side surface of the sixth lens L6 is R11, the curvature radius of the image side surface of the sixth lens L6 is R12 and the thickness on-axis of the sixth lens L6 is d11, they satisfy the condition: −10.72≤f6/f≤−2.45, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition −6.98≤(R11+R12)/(R11−R12)≤−1.58 fixes the shape of the sixth lens L6, when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, the problem like off-axis chromatic aberration is difficult to be corrected; when the condition 0.20≤d11≤0.70, is satisfied, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied, −6.70 f6/f≤−3.07; −4.36≤(R11+R12)/(R11−R12)≤−1.97; 0.32≤d11≤0.56.

In this embodiment, the object side surface of the seventh lens L7 is a concave surface relative to the proximal axis, its image side surface is a convex surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the seventh lens L7 is f7 and the thickness on-axis of the seventh lens L7 is d13, they satisfy the conditions −1.19≤f7/f≤−0.39, appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; when the condition 0.15≤d13≤0.45 is satisfied, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied, −0.75 f7/f≤−0.48; 0.24≤d13≤0.36.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 6.04 mm, it is beneficial for the realization of ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.77.

In this embodiment, the aperture F number of the camera optical lens 10 is less than or equal to 1.83. A large aperture has better imaging performance. Preferably, the aperture F number of the camera optical lens 10 is less than or equal to 1.80.

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

In the following, an example will be used to describe the camera optical lens 10 of the present invention. The symbols recorded in each example are as follows. The unit of distance, radius and center thickness is mm.

TTL: Optical length (the distance on-axis from the object side surface to the image side surface of the first lens L1).

Preferably, inflexion points and/or arrest points can also be arranged on the object side surface and/or image side surface of the lens, so that the demand for high quality imaging can be satisfied, the description below can be referred for specific implementable scheme.

The design information of the camera optical lens 10 in the first embodiment of the present invention is shown in the following, the unit of the focal length, distance, radius and center thickness is mm.

The design information of the camera optical lens 10 in the first embodiment of the present invention is shown in the tables 1 and 2.

	TABLE 1
	R	d	nd	ν d
S1	∞	d0=	−0.359
R1	1.915	d1=	0.687	nd1	1.5441	ν 1	56.12
R2	8.292	d2=	0.033
R3	5.206	d3=	0.227	nd2	1.6510	ν 2	21.51
R4	3.342	d4=	0.508
R5	−4.958	d5=	0.210	nd3	1.6422	ν 3	22.41
R6	−9.070	d6=	0.033
R7	7.132	d7=	0.280	nd4	1.8468	ν 4	50.03
R8	22.349	d8=	0.602
R9	−15.144	d9=	0.778	nd5	1.5352	ν 5	56.12
R10	−1.322	d10=	0.033
R11	−5.559	d11=	0.400	nd6	1.5855	ν 6	29.91
R12	−10.027	d12=	0.382
R13	−2.963	d13=	0.299	nd7	1.5352	ν 7	56.12
R14	2.299	d14=	0.500
R15	∞	d15=	0.210	ndg	1.5168	ν g	64.17
R16	∞	d16=	0.190

In which, the meaning of the various symbols is as follows.

S1: Aperture;

R: The curvature radius of the optical surface, the central curvature radius in case of lens;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

R15: The curvature radius of the object side surface of the optical filter GF;

R16: The curvature radius of the image side surface of the optical filter GF;

d: The thickness on-axis of the lens and the distance on-axis between the lens;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

d15: The thickness on-axis of the optical filter GF;

d16: The distance on-axis from the image side surface to the image surface of the optical filter GF;

nd: The refractive power of the d line;

nd1: The refractive power of the d line of the first lens L1;

nd2: The refractive power of the d line of the second lens L2;

nd3: The refractive power of the d line of the third lens L3;

nd4: The refractive power of the d line of the fourth lens L4;

nd5: The refractive power of the d line of the fifth lens L5;

nd6: The refractive power of the d line of the sixth lens L6;

nd7: The refractive power of the d line of the seventh lens L7;

ndg: The refractive power of the d line of the optical filter GF;

vd: The abbe number;

v1: The abbe number of the first lens L1;

v2: The abbe number of the second lens L2;

v3: The abbe number of the third lens L3;

v4: The abbe number of the fourth lens L4;

v5: The abbe number of the fifth lens L5;

v6: The abbe number of the sixth lens L6;

v7: The abbe number of the seventh lens L7;

vg: The abbe number of the optical filter GF;

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

	TABLE 2
	Conic Index	Aspherical Surface Index
	k	A4	A6	A8	A10	A12	A14	A16
R1	−1.3135E−01	1.1174E−02	5.3674E−03	−1.9278E−03	1.2079E−03	1.5484E−03	4.3912E−04	−7.3001E−04
R2	−9.9997E+01	−4.0365E−03	−1.5322E−03	4.5987E−03	3.1128E−04	−3.1235E−03	−6.5792E−04	9.2802E−04
R3	−3.4270E+01	−2.6513E−02	−1.4725E−03	6.3218E−03	−1.8566E−03	1.9965E−03	4.2981E−05	3.3667E−04
R4	−4.7032E+00	−6.2052E−03	−3.4146E−03	7.3302E−03	1.1016E−03	−9.2851E−04	−1.1556E−03	6.1566E−03
R5	1.4745E+01	7.5077E−03	−4.2239E−02	−2.4683E−02	3.5036E−03	8.5488E−03	−2.3918E−03	1.2804E−03
R6	2.4721E+01	−7.4785E−03	−3.4412E−02	−4.9872E−03	4.4136E−03	3.0872E−03	5.1351E−04	−1.7365E−03
R7	−4.9986E+00	−6.7020E−02	1.1825E−02	4.2951E−03	−1.6698E−04	−3.5982E−04	−4.6589E−05	1.3035E−05
R8	9.8686E+01	−5.6117E−02	5.7465E−03	1.4179E−03	−1.7389E−04	1.3702E−04	2.0886E−04	1.4329E−05
R9	−1.0001E+02	−2.8086E−02	2.9819E−03	1.6598E−03	−1.1903E−03	−9.5386E−05	3.3575E−05	1.5479E−07
R10	−3.3817E+00	−5.2101E−02	1.7946E−02	−2.6702E−04	−1.9895E−04	−4.6710E−05	4.1952E−06	−2.6766E−06
R11	2.8016E+00	−1.2605E−02	2.3949E−04	5.4775E−05	−1.2211E−05	−1.2886E−06	9.4551E−07	3.7716E−07
R12	−3.7461E+01	−1.1857E−02	2.0528E−04	4.4212E−05	3.4180E−06	−1.0238E−06	−9.6006E−08	5.6795E−08
R13	−1.8882E−01	2.6597E−03	2.6156E−03	2.5111E−05	−1.5107E−05	−8.1786E−07	1.8088E−08	1.1967E−08
R14	−1.4107E+01	−2.2512E−02	3.5071E−03	−4.9303E−04	1.8850E−05	9.4375E−07	1.2375E−08	−5.3772E−09

Among them, K is a conic index, A4, A6, A8, A10, A12, A14, a16 are aspheric surface indexes.

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

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

Table 3 and table 4 show the inflexion points and the arrest point design data of the camera optical lens 10 lens in embodiment 1 of the present invention. In which, R1 and R2 represent respectively the object side surface and image side surface of the first lens L1, R3 and R4 represent respectively the object side surface and image side surface of the second lens L2, R5 and R6 represent respectively the object side surface and image side surface of the third lens L3, R7 and R8 represent respectively the object side surface and image side surface of the fourth lens L4, R9 and R10 represent respectively the object side surface and image side surface of the fifth lens L5, R11 and R12 represent respectively the object side surface and image side surface of the sixth lens L6, R13 and R14 represent respectively the object side surface and image side surface of the seventh lens L7. The data in the column named “inflexion point position” are the vertical distances from the 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” are the vertical distances from the arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

	TABLE 3
		Inflexion point	Inflexion point	Inflexion point
		number	position 1	position 2
	R1
	R2
	R3
	R4
	R5
	R6
	R7
	R8	2	0.265	1.175
	R9
	R10	2	1.275	1.585
	R11
	R12	1	2.155
	R13	1	1.545
	R14	1	0.745

TABLE 4
	Arrest point number	Arrest point position 1	Arrest point position 2
R1
R2
R3
R4
R5
R6
R7
R8	2	0.455	1.375
R9
R10
R11
R12
R13	1	2.625
R14	1	1.645

FIG. 2 and FIG. 3 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 435.8, 486.1 nm, 546.1 nm, 587.6 and 656.3 nm passes the camera optical lens 10 in the first embodiment. FIG. 4 shows the field curvature and distortion schematic diagrams after light with a wavelength of 546.1 nm passes the camera optical lens 10 in the first embodiment, the field curvature S in FIG. 4 is a field curvature in the sagittal direction, T is a field curvature in the meridian direction.

Table 13 shows the various values of the examples 1, 2, 3 and the values corresponding with the parameters which are already specified in the conditions.

As shown in Table 13, the first embodiment satisfies the various conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 2.291 mm, the full vision field image height is 3.475 mm, the vision field angle in the diagonal direction is 79.95°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as embodiment 1, the meaning of its symbols is the same as that of embodiment 1, in the following, only the differences are described.

Table 5 and table 6 show the design data of the camera optical lens 20 in embodiment 2 of the present invention.

	TABLE 5
	R	d	nd	ν d
S1	∞	d0=	−0.375
R1	1.998	d1=	0.596	nd1	1.5441	ν 1	56.12
R2	9.101	d2=	0.033
R3	5.116	d3=	0.325	nd2	1.6510	ν 2	21.51
R4	3.217	d4=	0.559
R5	−4.947	d5=	0.222	nd3	1.6422	ν 3	22.41
R6	−7.816	d6=	0.033
R7	7.527	d7=	0.447	nd4	1.7183	ν 4	67.51
R8	60.470	d8=	0.519
R9	−21.698	d9=	0.649	nd5	1.5352	ν 5	56.12
R10	−1.318	d10=	0.041
R11	−5.128	d11=	0.448	nd6	1.5855	ν 6	29.91
R12	−12.619	d12=	0.359
R13	−2.914	d13=	0.300	nd7	1.5352	ν 7	56.12
R14	2.420	d14=	0.500
R15	∞	d15=	0.210	ndg	1.5168	ν g	64.17
R16	∞	d16=	0.200

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

	TABLE 6
	Conic Index	Aspherical Surface Index
	k	A4	A6	A8	A10	A12	A14	A16
R1	−1.7516E−01	8.9925E−03	8.1218E−03	−2.7584E−03	3.7379E−04	1.5970E−03	8.1469E−04	−7.1335E−04
R2	−9.9891E+01	−2.5681E−03	−2.1510E−03	6.2694E−03	9.6733E−04	−4.0160E−03	−1.5158E−03	1.9369E−03
R3	−2.4107E+01	−2.2231E−02	−5.6579E−04	3.1453E−03	−4.4188E−03	1.5084E−03	6.6329E−04	4.2455E−04
R4	−3.9771E+00	−5.2815E−03	−6.8634E−03	4.2128E−03	−1.3875E−03	−3.1752E−03	−2.9619E−03	5.3380E−03
R5	1.6417E+01	−3.1324E−03	−4.5453E−02	−2.6225E−02	1.5531E−04	5.0225E−03	−3.2907E−03	4.7880E−03
R6	2.7935E+01	−9.8707E−03	−3.5530E−02	−5.5336E−03	5.3807E−03	4.6307E−03	1.5490E−03	−1.6419E−03
R7	2.7881E+00	−6.4856E−02	1.0700E−02	3.8566E−03	1.3140E−05	−7.7270E−05	8.9777E−05	7.5719E−06
R8	−1.0000E+02	−6.2228E−02	2.7031E−03	1.5497E−04	−8.7254E−04	−1.8351E−04	1.8588E−04	1.4608E−04
R9	−6.5880E+01	−3.4593E−02	1.5312E−03	1.4072E−03	−1.3479E−03	−1.5327E−04	4.0162E−05	1.7712E−05
R10	−3.3268E+00	−5.1546E−02	1.8999E−02	6.7281E−05	−1.5358E−04	−5.3366E−05	−1.7899E−06	−4.4816E−06
R11	3.1302E+00	−1.3245E−02	−3.4202E−04	3.1754E−05	7.2669E−06	3.8101E−06	1.0215E−06	3.0686E−08
R12	−4.3045E+01	−1.1535E−02	1.8528E−04	2.9227E−05	6.4149E−07	−1.2239E−06	−6.3020E−08	7.5898E−08
R13	−2.0472E−01	2.6836E−03	2.6988E−03	3.7093E−05	−1.3649E−05	−6.9784E−07	2.0048E−08	9.9916E−09
R14	−1.5250E+01	−2.3547E−02	3.5496E−03	−4.8169E−04	1.9655E−05	1.0064E−06	1.8030E−08	−4.3238E−09

Tables 7 and 8 show the inflexion point and arrest point design data of each lens of the camera optical lens 20 in embodiment 2 of the present invention.

	TABLE 7
		Inflexion point	Inflexion point	Inflexion point
		number	position 1	position 2
	R1
	R2
	R3
	R4
	R5
	R6
	R7
	R8	2	0.155	1.285
	R9
	R10	2	1.185	1.595
	R11
	R12	1	2.155
	R13	1	1.525
	R14	2	0.725	2.645

TABLE 8
	Arrest point number	Arrest point position 1
R1
R2
R3
R4
R5
R6
R7
R8	1	0.255
R9
R10
R11
R12
R13	1	2.425
R14	1	1.585

FIG. 6 and FIG. 7 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 435.8 nm, 486.1 nm and 546.1 nm, 587.6 and 656.8 passes the camera optical lens 20 in the second embodiment. FIG. 8 shows the field curvature and distortion schematic diagrams after light with a wavelength of 546.1 nm passes the camera optical lens 20 in the second embodiment.

As shown in Table 13, the second embodiment satisfies the various conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 2.286 mm, the full vision field image height is 3.475 mm, the vision field angle in the diagonal direction is 80.06°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as embodiment 1, the meaning of its symbols is the same as that of embodiment 1, in the following, only the differences are described.

The design information of the camera optical lens 10 in the third embodiment of the present invention is shown in the tables 9 and 10.

	TABLE 9
	R	d	nd	ν d
S1	∞	d0=	−0.372
R1	2.026	d1=	0.584	nd1	1.5441	ν 1	56.12
R2	7.544	d2=	0.034
R3	4.567	d3=	0.351	nd2	1.6510	ν 2	21.51
R4	3.212	d4=	0.575
R5	−4.940	d5=	0.209	nd3	1.6422	ν 3	22.41
R6	−8.656	d6=	0.033
R7	7.933	d7=	0.438	nd4	1.7492	ν 4	50.00
R8	60.437	d8=	0.519
R9	−27.084	d9=	0.666	nd5	1.5352	ν 5	56.12
R10	−1.332	d10=	0.043
R11	−5.278	d11=	0.465	nd6	1.5855	ν 6	29.91
R12	−11.526	d12=	0.378
R13	−2.919	d13=	0.300	nd7	1.5352	ν 7	56.12
R14	2.450	d14=	0.500
R15	∞	d15=	0.210	ndg	1.5168	ν g	64.17
R16	∞	d16=	0.191

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

	TABLE 10
	Conic Index	Aspherical Surface Index
	k	A4	A6	A8	A10	A12	A14	A16
R1	−1.3904E−01	1.0070E−02	7.7631E−03	−2.7381E−03	4.5816E−04	1.6054E−03	7.7830E−04	−7.2742E−04
R2	−1.0000E+02	−2.9597E−03	−2.1370E−03	5.8426E−03	7.2236E−04	−3.9305E−03	−1.3489E−03	1.8208E−03
R3	−2.4324E+01	−2.2789E−02	−9.2919E−04	3.3265E−03	−4.4108E−03	1.2212E−03	4.1561E−04	6.7692E−04
R4	−3.9606E+00	−5.1295E−03	−6.3569E−03	4.3048E−03	−1.0943E−03	−2.5978E−03	−2.4541E−03	5.2985E−03
R5	1.6348E+01	−3.8053E−03	−4.4444E−02	−2.4665E−02	1.3272E−03	5.4971E−03	−3.5351E−03	3.9368E−03
R6	2.6592E+01	−8.8541E−03	−3.5712E−02	−5.5070E−03	5.4781E−03	4.5956E−03	1.3659E−03	−1.9112E−03
R7	3.9591E+00	−6.4490E−02	1.0752E−02	3.7018E−03	−9.0235E−05	−1.1447E−04	8.2499E−05	8.9247E−06
R8	9.9898E+01	−6.2655E−02	2.7584E−03	2.7359E−04	−8.3184E−04	−1.9231E−04	1.6579E−04	1.3047E−04
R9	−9.9668E+01	−3.3211E−02	2.1703E−03	1.4917E−03	−1.3377E−03	−1.5493E−04	3.7382E−05	1.5896E−05
R10	−3.3110E+00	−5.2136E−02	1.8857E−02	4.7265E−05	−1.4295E−04	−4.6821E−05	1.3699E−07	−4.1665E−06
R11	2.9052E+00	−1.2946E−02	−1.3576E−04	6.3230E−05	6.7698E−06	3.0368E−06	9.0518E−07	6.0175E−08
R12	−3.0660E+01	−1.1448E−02	2.3213E−04	3.7496E−05	1.7436E−06	−1.1540E−06	−7.4493E−08	6.9796E−08
R13	−1.9579E−01	2.5060E−03	2.6783E−03	3.5203E−05	−1.3814E−05	−7.0859E−07	1.8773E−08	9.6939E−09
R14	−1.4731E+01	−2.3404E−02	3.5732E−03	−4.8208E−04	1.9449E−05	9.6282E−07	1.1731E−08	−5.0715E−09

Table 11 and table 12 show the inflexion points and the arrest point design data of the camera optical lens 30 lens in embodiment 3 of the present invention.

	TABLE 11
		Inflexion	Inflexion	Inflexion
		point number	point position 1	point position 2
	R1
	R2
	R3
	R4
	R5
	R6
	R7
	R8	2	0.155	1.305
	R9
	R10	2	1.195	1.625
	R11
	R12	1	2.135
	R13	1	1.545
	R14	1	0.735

TABLE 12
	Arrest point number	Arrest point position 1
R1
R2
R3
R4
R5
R6
R7
R8	1	0.255
R9
R10
R11
R12
R13	1	2.425
R14	1	1.605

FIG. 10 and FIG. 11 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 435.8 nm, 486.1 nm, 546.1, 587.6 nm, and 656.3 nm passes the camera optical lens 30 in the third embodiment. FIG. 12 shows the field curvature and distortion schematic diagrams after light with a wavelength of 546.1 nm passes the camera optical lens 30 in the third embodiment.

The following table 13, in accordance with the above conditions, lists the values in this embodiment corresponding with each condition expression. Apparently, the camera optical system of this embodiment satisfies the above conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 2.2893 mm, the full vision field image height is 3.475 mm, the vision field angle in the diagonal direction is 80.00°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

TABLE 13
	Embodiment 1	Embodiment 2	Embodiment 3
f	4.078	4.070	4.075
f1	4.389	4.549	4.887
f2	−14.906	−14.123	−18.342
f3	−17.195	−21.414	−18.135
f4	12.206	11.886	12.086
f5	2.644	2.582	2.582
f6	−21.864	−14.971	−16.966
f7	−2.362	−2.412	−2.431
f3/f4	−1.409	−1.802	−1.500
(R1 + R2)/(R1 − R2)	−1.600	−1.562	−1.734
(R3 + R4)/(R3 − R4)	4.586	4.387	5.743
(R5 + R6)/(R5 − R6)	−3.411	−4.448	−3.659
(R7 + R8)/(R7 − R8)	−1.937	−1.284	−1.302
(R9 + R10)/(R9 − R10)	1.191	1.129	1.103
(R11 + R12)/(R11 − R12)	−3.488	−2.369	−2.689
(R13 + R14)/(R13 − R14)	0.126	0.092	0.087
f1/f	1.076	1.118	1.199
f2/f	−3.655	−3.470	−4.501
f3/f	−4.216	−5.261	−4.450
f4/f	2.993	2.920	2.966
f5/f	0.648	0.635	0.634
f6/f	−5.361	−3.678	−4.164
f7/f	−0.579	−0.593	−0.597
d1	0.687	0.596	0.584
d3	0.227	0.325	0.351
d5	0.210	0.222	0.209
d7	0.280	0.447	0.438
d9	0.778	0.649	0.666
d11	0.400	0.448	0.465
d13	0.299	0.300	0.300
Fno	1.780	1.780	1.780
TTL	5.370	5.440	5.495
d7/TTL	0.052	0.082	0.080
n1	1.5441	1.5441	1.5441
n2	1.6510	1.6510	1.6510
n3	1.6422	1.6422	1.6422
n4	1.8468	1.7183	1.7492
n5	1.5352	1.5352	1.5352
n6	1.5855	1.5855	1.5855
n7	1.5352	1.5352	1.5352

It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.

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 camera optical lens satisfies the following conditions: 1.05≤f1/f≤1.5;1.7≤n4≤2.2;−2≤f3/f4≤2;−10≤(R13+R14)/(R13−R14)≤10;0.01≤d7/TTL≤0.1;−9.00≤f2/f≤−2.31;wheref: the focal length of the camera optical lens, and the unit is mm;f1: the focal length of the first lens, and the unit is mm;f2: the focal length of the second lens, and the unit is mm;f3: the focal length of the third lens, and the unit is mm;f4: the focal length of the fourth lens, and the unit is mm;n4: the refractive power of the fourth lens;d7: the thickness on-axis of the fourth lens, and the unit is mm;TTL: the total optical length of the camera optical lens;R13: the curvature radius of object side surface of the seventh lens, and the unit is mm;R14: the curvature radius of image side surface of the seventh lens, and the unit is mm.

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 glass material, the fifth lens is made of plastic material, the sixth lens is made of plastic material, the seventh lens is made of plastic material.

3. The camera optical lens as described in claim 1, wherein the first lens has a positive refractive power with a convex object side surface and concave image side surface; the camera optical lens further satisfies the following conditions: −3.47≤(R1+R2)/(R1−R2≤−1.04;0.29≤d1≤1.03;whereR1: the curvature radius of the object side surface of the first lens, and the unit is mm;R2: the curvature radius of the image side surface of the first lens, and the unit is mm;d1: the thickness on-axis of the first lens, and the unit is mm.

4. The camera optical lens as described in claim 1, wherein the second lens has a negative refractive power and includes a convex object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions: 2.19≤(R3+R4)/(R3−R4)≤8.61;0.11≤d3≤0.53;whereR3: the curvature radius of the object side surface of the second lens, and the unit is mm;R4: the curvature radius of the image side surface of the second lens, and the unit is mm;d3: the thickness on-axis of the second lens, and the unit is mm.

5. The camera optical lens as described in claim 1, wherein the third lens has a negative refractive power with a concave object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions: −10.52≤f3/f≤−2.81;−8.90≤(R5+R6)/(R5−R6)≤−2.27;0.10≤d5≤0.33;wheref: the focal length of the camera optical lens, and the unit is mm;f3: the focal length of the third lens, and the unit is mm;R5: the curvature radius of the object side surface of the third lens, and the unit is mm;R6: the curvature radius of the image side surface of the third lens, and the unit is mm;d5: the thickness on-axis of the third lens, and the unit is mm.

6. The camera optical lens as described in claim 1, wherein the fourth lens has a positive refractive power and includes a convex object side surface and a concave image side surface, and the camera optical lens further satisfies the following conditions: 1.46≤f4/f≤4.49;−3.87≤(R7+R8)/(R7−R8)≤−0.86;0.14≤d7≤0.67;wheref: the focal length of the camera optical lens, and the unit is mm;f4: the focal length of the fourth lens, and the unit is mm;R7: the curvature radius of the object side surface of the fourth lens, and the unit is mm;R8: the curvature radius of the image side surface of the fourth lens, and the unit is mm;d7: the thickness on-axis of the fourth lens, and the unit is mm.

7. The camera optical lens as described in claim 1, wherein the fifth lens has a positive refractive power with a concave object side surface and a convex image side surface; and the camera optical lens further satisfies the following conditions: 0.32≤f5/f≤0.97;0.55≤(R9+R10)/(R9−R10)≤1.79;0.32≤d9≤1.17;wheref: the focal length of the camera optical lens, and the unit is mm;f5: the focal length of the fifth lens, and the unit is mm;R9: the curvature radius of the object side surface of the fifth lens, and the unit is mm;R10: the curvature radius of the image side surface of the fifth lens, and the unit is mm;d9: the thickness on-axis of the fifth lens, and the unit is mm.

8. The camera optical lens as described in claim 1, wherein the sixth lens has a negative refractive power with a concave object side surface and a convex image side surface; and the camera optical lens further satisfies the following conditions: −10.72≤f6/f≤−2.45;−6.98≤(R11+R12)/(R11−R12)≤−1.58;0.20≤d11≤0.70;wheref: the focal length of the camera optical lens, and the unit is mm;f6: the focal length of the sixth lens, and the unit is mm;R11: the curvature radius of the object side surface of the sixth lens, and the unit is mm;R12: the curvature radius of the image side surface of the sixth lens, and the unit is mm;d11: the thickness on-axis of the sixth lens, and the unit is mm.

9. The camera optical lens as described in claim 1, wherein the seventh lens has a negative refractive power with a concave object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions: −1.19≤f4/f≤−0.39;0.15≤d13≤0.45;wheref: the focal length of the camera optical lens, and the unit is mm;f7: the focal length of the seventh lens, and the unit is mm;d13: the thickness on-axis of the seventh lens, and the unit is mm.

10. The camera optical lens as described in claim 1, wherein a total optical length TTL of the camera optical lens is less than or equal to 6.04 millimeters.

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