Camera optical lens including six lenses of +++−+− 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; a second lens having a positive refractive power; a third lens having a positive refractive power; a fourth lens; a fifth lens; and a sixth lens. The camera optical lens satisfies following conditions: 3.50≤f1/f3≤7.00; and −10.00≤R5/R6≤−5.00. 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 6 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, and a sixth lens L6. An optical element such as an optical filter GF can be arranged between the sixth lens L6 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, and the sixth lens L6 is made of a plastic material.

The second lens L2 has a positive refractive power, and the third lens L3 has a positive refractive power.

A focal length of the first lens L1 is defined as f1, and a focal length of the third lens L3 is defined as f3. The camera optical lens 10 should satisfy a condition of 3.50≤f1/f3≤7.00. When the condition is satisfied, the field curvature of the system can be effectively balanced for further improving the image quality. Preferably, 3.55≤f1/f3≤6.90.

A curvature radius of an object side surface of the third lens L3 is defined as R5 and a curvature radius of an image side surface of the third lens L3 is defined as R6. The camera optical lens 10 further satisfies a condition of −10.00≤R5/R6≤−5.00. This can effectively control a shape of the third lens L3, thereby facilitating shaping of the third lens L3. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem of an aberration. Preferably, −9.75≤R5/R6≤−5.10.

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 TTL. When the focal length of the first lens, the focal length of the third lens, the curvature radius of the object side surface of the third lens and the curvature radius of the image side surface of the third lens satisfy the above conditions, the camera optical lens will have the advantage of high performance and satisfy the design requirement of a low TTL.

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

Herein, a focal length of the camera optical lens 10 is defined as f. The camera optical lens 10 should satisfy a condition of 2.11≤f1/f≤13.67, 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 the 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, 3.37≤f1/f≤10.94.

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 −126.78≤(R1+R2)/(R1−R2)≤52.10. 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, −79.24≤(R1+R2)/(R1−R2)≤41.68.

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≤0.18. This facilitates achieving ultra-thin lenses. Preferably, 0.07≤d1/TTL≤0.15.

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.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the second lens L2 is f2. The camera optical lens 10 further satisfies a condition of 0.44≤f2/f≤1.80. By controlling the positive refractive power of the second lens L2 within the reasonable range, correction of the aberration of the optical system can be facilitated. Preferably, 0.71≤f2/f≤1.44.

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 −5.73≤(R3+R4)/(R3−R4)≤−1.33. This can reasonably control 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, −3.58≤(R3+R4)/(R3−R4)≤−1.67.

An on-axis thickness of the second lens L2 is defined as d3. The camera optical lens 10 further satisfies a condition of 0.04≤d3/TTL≤0.16. This facilitates achieving ultra-thin lenses. Preferably, 0.07≤d3/TTL≤0.13.

In this embodiment, an object side surface of the third lens L3 is convex in the paraxial region, and an image side surface of the third lens L3 is convex in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the third lens L3 is f3. The camera optical lens 10 further satisfies a condition of 0.59≤f3/f≤2.01. When the condition is satisfied, the field curvature of the system can be balanced for further improving the image quality. Preferably, 0.94≤f3/f≤1.61.

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 0.34≤(R5+R6)/(R5−R6)≤1.21. 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, 0.54≤(R5+R6)/(R5−R6)≤0.97.

An on-axis thickness of the third lens L3 is defined as d5. The camera optical lens 10 further satisfies a condition of 0.04≤d5/TTL≤0.13. This facilitates achieving ultra-thin lenses. Preferably, 0.07≤d5/TTL≤0.11.

In this embodiment, an object side surface of the fourth lens L4 is concave in the paraxial region, an image side surface of the fourth lens L4 is convex in the paraxial region, and the fourth lens L4 has a negative refractive power.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the fourth lens L4 is f4. The camera optical lens 10 further satisfies a condition of −2.88≤f4/f≤−0.88. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, −1.80≤f4/f≤−1.10.

A curvature radius of the object side surface of the fourth lens L4 is defined as R7, and a curvature radius of the image side surface of the fourth lens L4 is defined as R8. The camera optical lens 10 further satisfies a condition of −5.96≤(R7+R8)/(R7−R8)≤−1.78, 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, −3.72≤(R7+R8)/(R7−R8)≤−2.23.

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 object side surface of the fifth lens L5 is concave in the paraxial region, 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.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the fifth lens L5 is f5. The camera optical lens 10 further satisfies a condition of 0.87≤f5/f≤3.51. This can effectively make a light angle of the camera lens gentle and reduce the tolerance sensitivity. Preferably, 1.38≤f5/f≤2.81.

A curvature radius of the 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 1.03≤(R9+R10)/(R9−R10)≤3.94, 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, 1.65≤(R9+R10)/(R9−R10)≤3.15.

A thickness on-axis of the fifth lens L5 is defined as d9. The camera optical lens 10 further satisfies a condition of 0.09≤d9/TTL≤0.31. This facilitates achieving ultra-thin lenses. Preferably, 0.15≤d9/TTL≤0.25.

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

The focal length of the camera optical lens 10 is defined as f, and a focal length of the sixth lens L6 is f6. The camera optical lens 10 further satisfies a condition of −1.57≤f6/f≤−0.45. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, −0.98≤f6/f≤−0.56.

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 0.60≤(R11+R12)/(R11−R12)≤2.28, 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, 0.96≤(R11+R12)/(R11−R12)≤1.82.

A thickness on-axis of the sixth lens L6 is defined as d11. The camera optical lens 10 further satisfies a condition of 0.06≤d11/TTL≤0.19. This facilitates achieving ultra-thin lenses. Preferably, 0.09≤d11/TTL≤0.16.

In this embodiment, the focal length of the camera optical lens 10 is defined as f, and a combined focal length of the first lens L1 and the second lens L2 is f12. The camera optical lens 10 further satisfies a condition of 0.46≤f12/f≤1.50. This can eliminate the aberration and distortion of the camera optical lens while suppressing a back focal length of the camera optical lens, thereby maintaining miniaturization of the camera lens system. Preferably, 0.73≤f12/f≤1.20.

In this embodiment, the total optical length TTL of the camera optical lens 10 is smaller than or equal to 6.18 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 5.89 mm.

In this embodiment, the camera optical lens 10 has a large F number, which is smaller than or equal to 2.47. The camera optical lens 10 has a better imaging performance. Preferably, the F number of the camera optical lens 10 is smaller than or equal to 2.42.

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 (the total optical length from the object side surface of the first lens to the image plane of the camera optical lens along the 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	νd
S1	∞	d0 =	−0.180
R1	1.823	d1 =	0.682	nd1	1.5439	ν1	55.95
R2	1.721	d2 =	0.050
R3	1.559	d3 =	0.497	nd2	1.5439	ν2	55.95
R4	4.678	d4 =	0.289
R5	34.918	d5 =	0.470	nd3	1.5439	ν3	55.95
R6	−3.676	d6 =	0.171
R7	−2.187	d7 =	0.490	nd4	1.6713	ν4	19.24
R8	−4.764	d8 =	0.148
R9	−9.362	d9 =	1.163	nd5	1.6713	ν5	19.24
R10	−3.563	d10 =	0.202
R11	19.136	d11 =	0.659	nd6	1.6397	ν6	23.53
R12	1.771	d12 =	0.300
R13	∞	d13 =	0.110	ndg	1.5168	νg	64.17
R14	∞	d14 =	0.383

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 an object side surface of the optical filter GF;

R14: 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 optical filter GF;

d13: on-axis thickness of the optical filter GF;

d14: 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;

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;

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	A18	A20
R1	1.6620E+00	−4.4904E−02	−2.5378E−02	3.4408E−03	−2.9677E−02	−1.8814E−02	5.2478E−02	−3.6486E−02	0.0000E+00	0.0000E+00
R2	0.0000E+00	−1.7676E−01	5.0335E−02	−1.0284E−01	4.3084E−02	−5.0896E−03	−3.0291E−05	−5.7815E−05	0.0000E+00	0.0000E+00
R3	0.0000E+00	−1.6878E−01	4.3960E−02	−1.2603E−01	9.7652E−02	−4.9601E−02	1.3760E−07	5.2249E−08	0.0000E+00	0.0000E+00
R4	0.0000E+00	−3.9555E−02	2.7822E−02	−1.4577E−01	2.7233E−01	−1.6972E−01	−2.4982E−06	−4.0094E−10	0.0000E+00	0.0000E+00
R5	0.0000E+00	−1.0289E−01	3.9295E−02	−8.0669E−02	1.5521E−01	4.3602E−02	−1.1538E−01	−7.6325E−11	0.0000E+00	0.0000E+00
R6	4.0648E+00	−1.0014E−01	−2.2346E−01	7.9806E−01	−1.2606E+00	1.0770E+00	−3.9649E−01	−3.4894E−07	0.0000E+00	0.0000E+00
R7	2.1042E+00	2.1423E−02	−5.0780E−01	1.3520E+00	−1.8429E+00	1.2279E+00	−3.5154E−01	3.0283E−08	0.0000E+00	0.0000E+00
R8	0.0000E+00	1.8993E−01	−6.7989E−01	9.8064E−01	−7.4649E−01	2.2717E−01	1.3794E−02	−1.5108E−02	0.0000E+00	0.0000E+00
R9	0.0000E+00	1.6905E−01	−5.3197E−01	5.9655E−01	−3.6297E−01	6.4489E−04	2.5613E−01	−2.8923E−01	1.4682E−01	−2.8620E−02
R10	1.0667E+00	6.3009E−02	−1.4721E−01	1.1259E−01	−6.1950E−02	2.8526E−02	−9.3524E−03	1.9261E−03	−2.3029E−04	1.2906E−05
R11	4.1239E+01	−1.2861E−01	−8.2085E−02	1.4563E−01	−1.2701E−01	7.4840E−02	−2.7451E−02	5.8877E−03	−6.7512E−04	3.1994E−05
R12	−1.3243E+00	−2.0028E−01	1.0421E−01	−4.0279E−02	1.1222E−02	−2.2328E−03	3.1306E−04	−2.9638E−05	1.6951E−06	−4.3661E−08

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18 and A20 are aspheric surface coefficients.

IH: Image Heighty=(x²/R)/[1+{1−(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶+A18x¹⁸+A20x²⁰  (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, P2R1 and P2R2 represent the object side surface and the image side surface of the second lens L2, P3R1 and P3R2 represent the object side surface and the image side surface of the third lens L3, P4R1 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, P5R1 and P5R2 represent the object side surface and the image side surface of the fifth lens L5, and P6R1 and P6R2 represent the object side surface and the image side surface of the sixth lens L6. 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	Inflexion	Inflexion
		inflexion	point	point	point
		points	position 1	position 2	position 3
	P1R1	0
	P1R2	1	0.575
	P2R1	1	0.615
	P2R2	1	0.715
	P3R1	3	0.155	0.775	0.855
	P3R2	0
	P4R1	0
	P4R2	0
	P5R1	0
	P5R2	1	1.785
	P6R1	2	0.185	1.395
	P6R2	2	0.595	2.625

TABLE 4
	Number of arrest points	Arrest point position 1
P1R1	0
P1R2	0
P2R1	0
P2R2	0
P3R1	1	0.265
P3R2	0
P4R1	0
P4R2	0
P5R1	0
P5R2	0
P6R1	1	0.305
P6R2	1	1.415

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 486.1 nm, 587.6 nm and 656.3 nm after passing the camera optical lens 10 according to Embodiment 1. FIG. 4 illustrates a field curvature and a distortion of light with a wavelength of 587.6 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 meridian 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 entrance pupil diameter of the camera optical lens is 1.909 mm. The image height of 1.0H is 3.2376 mm. The FOV (field of view) is 69.79°. 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 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	νd
S1	∞	d0 =	−0.180
R1	1.838	d1 =	0.482	nd1	1.5439	ν1	55.95
R2	1.897	d2 =	0.074
R3	1.645	d3 =	0.599	nd2	1.5439	ν2	55.95
R4	3.858	d4 =	0.270
R5	25.489	d5 =	0.494	nd3	1.5439	ν3	55.95
R6	−3.290	d6 =	0.185
R7	−1.988	d7 =	0.483	nd4	1.6713	ν4	19.24
R8	−4.363	d8 =	0.138
R9	−12.086	d9 =	1.024	nd5	1.6713	ν5	19.24
R10	−4.180	d10 =	0.256
R11	8.508	d11 =	0.720	nd6	1.6397	ν6	23.53
R12	1.701	d12 =	0.300
R13	∞	d13 =	0.110	ndg	1.5168	νg	64.17
R14	∞	d14 =	0.415

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 coeffcients
	k	A4	A6	A8	A10	A12	A14	A16	A18	A20
R1	1.8030E+00	−5.3824E−02	−2.2263E−02	−6.2159E−03	−3.2931E−02	−1.2096E−02	5.2379E−02	−4.4130E−02	0.0000E+00	0.0000E+00
R2	0.0000E+00	−1.8373E−01	6.7659E−02	−9.0475E−02	4.5231E−02	−1.9093E−02	9.6024E−04	−5.7788E−05	0.0000E+00	0.0000E+00
R3	0.0000E+00	−1.7204E−01	4.3839E−02	−8.2081E−02	6.6762E−02	−4.0669E−02	−1.2610E−11	2.9054E−11	0.0000E+00	0.0000E+00
R4	0.0000E+00	−3.9625E−02	1.8794E−02	−1.2526E−01	2.6839E−01	−1.6972E−01	2.3642E−11	−4.6372E−12	0.0000E+00	0.0000E+00
R5	0.0000E+00	−9.1003E−02	3.2024E−02	−5.8746E−02	1.3755E−01	5.0976E−02	−1.1538E−01	−3.3728E−12	0.0000E+00	0.0000E+00
R6	3.5281E+00	−9.5974E−02	−2.0388E−01	7.8684E−01	−1.2664E+00	1.0798E+00	−3.8858E−01	−2.1303E−11	0.0000E+00	0.0000E+00
R7	1.7127E+00	2.7993E−02	−4.6917E−01	1.3468E+00	−1.8562E+00	1.2267E+00	−3.3027E−01	2.3015E−11	0.0000E+00	0.0000E+00
R8	0.0000E+00	1.9179E−01	−6.8001E−01	9.8345E−01	−7.4702E−01	2.2640E−01	1.3650E−02	−1.4634E−02	0.0000E+00	0.0000E+00
R9	0.0000E+00	1.6329E−01	−4.9199E−01	4.0063E−01	1.3162E−01	−8.0431E−01	1.0856E+00	−8.0951E−01	3.2791E−01	−5.5466E−02
R10	7.8191E−01	−9.2692E−03	2.4695E−02	−1.4974E−01	1.9981E−01	−1.4776E−01	6.8882E−02	−1.9644E−02	3.0830E−03	−2.0254E−04
R11	6.5801E+00	−2.1413E−01	7.4104E−02	−5.6677E−03	−4.8128E−02	5.3913E−02	−2.5701E−02	6.2987E−03	−7.8251E−04	3.9167E−05
R12	−1.4289E+00	−2.2006E−01	1.3730E−01	−6.6420E−02	2.3020E−02	−5.5137E−03	8.8743E−04	−9.1380E−05	5.4176E−06	−1.4001E−07

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	Inflexion
		inflexion	point	point	point
		points	position 1	position 2	position 3
	P1R1	0
	P1R2	1	0.555
	P2R1	1	0.625
	P2R2	1	0.805
	P3R1	3	0.195	0.725	0.885
	P3R2	0
	P4R1	0
	P4R2	0
	P5R1	0
	P5R2	3	1.455	1.535	1.725
	P6R1	2	0.225	1.365
	P6R2	2	0.595	2.625

TABLE 8
	Number of arrest points	Arrest point position 1
P1R1	0
P1R2	1	0.905
P2R1	0
P2R2	0
P3R1	1	0.335
P3R2	0
P4R1	0
P4R2	0
P5R1	0
P5R2	0
P6R1	1	0.385
P6R2	1	1.405

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 486.1 nm, 587.6 nm and 656.3 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 587.6 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 1.871 mm. The image height of 1.0H is 3.2376 mm. The FOV (field of view) is 70.90°. 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	νd
S1	∞	d0 =	−0.180
R1	1.835	d1 =	0.500	nd1	1.5439	ν1	55.95
R2	2.019	d2 =	0.075
R3	1.688	d3 =	0.578	nd2	1.5439	ν2	55.95
R4	3.499	d4 =	0.260
R5	17.545	d5 =	0.487	nd3	1.5439	ν3	55.95
R6	−3.375	d6 =	0.193
R7	−1.966	d7 =	0.484	nd4	1.6713	ν4	19.24
R8	−3.953	d8 =	0.140
R9	−9.363	d9 =	1.035	nd5	1.6713	ν5	19.24
R10	−4.198	d10 =	0.233
R11	8.290	d11 =	0.717	nd6	1.6397	ν6	23.53
R12	1.706	d12 =	0.300
R13	∞	d13 =	0.110	ndg	1.5168	νg	64.17
R14	∞	d14 =	0.409

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	A18	A20
R1	1.7948E+00	−5.3083E−02	−2.3877E−02	−5.8935E−03	−3.2925E−02	−1.2953E−02	5.2858E−02	−4.4130E−02	0.0000E+00	0.0000E+00
R2	0.0000E+00	−1.8211E−01	6.7909E−02	−8.8360E−02	4.8742E−02	−1.8595E−02	−4.3924E−05	−5.7788E−05	0.0000E+00	0.0000E+00
R3	0.0000E+00	−1.7227E−01	4.4210E−02	−7.9800E−02	7.0973E−02	−4.1141E−02	−1.1983E−11	2.8020E−11	0.0000E+00	0.0000E+00
R4	0.0000E+00	−3.7974E−02	1.6131E−02	−1.2103E−01	2.6508E−01	−1.6972E−01	2.1763E−11	−4.5932E−12	0.0000E+00	0.0000E+00
R5	0.0000E+00	−8.7785E−02	2.9963E−02	−5.6599E−02	1.3194E−01	5.4258E−02	−1.1538E−01	−2.9370E−12	0.0000E+00	0.0000E+00
R6	3.7296E+00	−9.6845E−02	−2.0615E−01	7.8681E−01	−1.2634E+00	1.0801E+00	−3.9111E−01	−2.1838E−11	0.0000E+00	0.0000E+00
R7	1.8221E+00	3.0832E−02	−4.6731E−01	1.3512E+00	−1.8536E+00	1.2280E+00	−3.3400E−01	2.3881E−11	0.0000E+00	0.0000E+00
R8	0.0000E+00	1.9983E−01	−6.7921E−01	9.8324E−01	−7.4719E−01	2.2634E−01	1.3639E−02	−1.4622E−02	0.0000E+00	0.0000E+00
R9	0.0000E+00	1.7130E−01	−4.9926E−01	4.0192E−01	1.6755E−01	−9.0854E−01	1.2256E+00	−9.1251E−01	3.6763E−01	−6.1731E−02
R10	1.0363E+00	−1.1136E−02	3.0268E−02	−1.5563E−01	2.0277E−01	−1.4854E−01	6.8896E−02	−1.9573E−02	3.0618E−03	−2.0054E−04
R11	6.2937E+00	−2.1766E−01	8.1951E−02	−9.9886E−03	−4.9040E−02	5.5827E−02	−2.6528E−02	6.4621E−03	−7.9726E−04	3.9608E−05
R12	−1.4521E+00	−2.2080E−01	1.4000E−01	−6.8539E−02	2.3960E−02	−5.7764E−03	9.3427E−04	−9.6530E−05	5.7340E−06	−1.4828E−07

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	Inflexion
		inflexion	point	point	point
		points	position 1	position 2	position 3
	P1R1	0
	P1R2	1	0.545
	P2R1	1	0.615
	P2R2	1	0.815
	P3R1	3	0.245	0.715	0.885
	P3R2	0
	P4R1	0
	P4R2	0
	P5R1	0
	P5R2	2	1.745	1.815
	P6R1	2	0.225	1.365
	P6R2	2	0.585	2.615

TABLE 12
	Number of arrest points	Arrest point position 1
P1R1	0
P1R2	1	0.895
P2R1	0
P2R2	0
P3R1	1	0.415
P3R2	0
P4R1	0
P4R2	0
P5R1	0
P5R2	0
P6R1	1	0.395
P6R2	1	1.405

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 486.1 nm, 587.6 nm and 656.3 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 587.6 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 1.868 mm. The image height of 1.0H is 3.2376 mm. The FOV (field of view) is 70.93°. 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	Embodiment	Embodiment	Embodiment
	conditions	1	2	3
	f	4.582	4.490	4.483
	f1	41.755	28.027	18.890
	f2	4.069	4.813	5.387
	f3	6.140	5.390	5.247
	f4	−6.523	−5.924	−6.458
	f5	7.930	9.047	10.492
	f6	−3.096	−3.467	−3.508
	f12	4.203	4.431	4.483
	FNO	2.40	2.40	2.40
	f1/f3	6.80	5.20	3.60
	R5/R6	−9.50	−7.75	−5.20

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, substantially consisting of, from an object side to an image side: a first lens;a second lens having a positive refractive power;a third lens having a positive refractive power;a fourth lens;a fifth lens; anda sixth lens,wherein the camera optical lens satisfies following conditions: 3.50≤f1/f3≤7.00; and−10.00≤R5/R6≤−5.00,wheref1 denotes a focal length of the first lens;f3 denotes a focal length of the third lens;R5 denotes a curvature radius of an object side surface of the third lens; andR6 denotes a curvature radius of an image side surface of the third lens.

2. The camera optical lens as described in claim 1, further satisfying following conditions: 3.55≤f1/f3≤6.90; and−9.75≤R5/R6≤−5.10.

3. The camera optical lens as described in claim 1, wherein the first lens has a positive refractive power, and 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: 2.11≤f1/f≤13.67;−126.78≤(R1+R2)/(R1−R2)≤52.10; and0.04≤d1/TTL≤0.18,wheref denotes a focal length of the camera optical lens;R1 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;TTL denotes 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; andd1 denotes an on-axis thickness of the first lens.

4. The camera optical lens as described in claim 3, further satisfying following conditions: 3.37≤f1/f≤10.94;−79.24≤(R1+R2)/(R1−R2)≤41.68; and0.07≤d1/TTL≤0.15.

5. 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: 0.44≤f2/f≤1.80;−5.73≤(R3+R4)/(R3−R4)≤−1.33; and0.04≤d3/TTL≤0.16,wheref denotes a focal length of the camera optical lens;f2 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;d3 denotes an on-axis thickness of the second lens; andTTL 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.

6. The camera optical lens as described in claim 5, further satisfying following conditions: 0.71≤f2/f≤1.44;−3.58≤(R3+R4)/(R3−R4)≤−1.67; and0.07≤d3/TTL≤0.13.

7. The camera optical lens as described in claim 1, wherein the object side surface of the third lens is convex in a paraxial region, and the image side surface of the third lens is convex in the paraxial region, and the camera optical lens further satisfies following conditions: 0.59≤f3/f≤2.01;0.34≤(R5+R6)/(R5−R6)≤1.21; and0.04≤d5/TTL≤0.13,wheref denotes a focal length of the camera optical lens;d5 denotes an on-axis thickness of the third lens; andTTL 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.

8. The camera optical lens as described in claim 7, further satisfying following conditions: 0.94≤f3/f≤1.61;0.54≤(R5+R6)/(R5−R6)≤0.97; and0.07≤d5/TTL≤0.11.

9. The camera optical lens as described in claim 1, wherein the fourth 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, and the camera optical lens further satisfies following conditions: −2.88≤f4/f≤−0.88;−5.96≤(R7+R8)/(R7−R8)≤−1.78; and0.04≤d7/TTL≤0.13,wheref denotes a focal length of the camera optical lens;f4 denotes a focal length of the fourth lens;R7 denotes a curvature radius of the object side surface of the fourth lens;R8 denotes a curvature radius of the image side surface of the fourth lens;d7 denotes an on-axis thickness of the fourth lens; andTTL 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.

10. The camera optical lens as described in claim 9, further satisfying following conditions: −1.80≤f4/f≤−1.10;−3.72≤(R7+R8)/(R7−R8)≤−2.23; 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 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: 0.87≤f5/f≤3.51;1.03≤(R9+R10)/(R9−R10)≤3.94; and0.09≤d9/TTL≤0.31,wheref denotes a focal length of the camera optical lens;f5 denotes a focal length of the fifth lens;R9 denotes a curvature radius of the object side surface of the fifth lens;R10 denotes a curvature radius of the image side surface of the fifth lens;d9 denotes an on-axis thickness of the fifth lens; andTTL 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.

12. The camera optical lens as described in claim 11, further satisfying following conditions: 1.38≤f5/f≤2.81;1.65≤(R9+R10)/(R9−R10)≤3.15; and0.15≤d9/TTL≤0.25.

13. The camera optical lens as described in claim 1, wherein the sixth lens has a negative refractive power, and 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: −1.57≤f6/f≤−0.45;0.60≤(R11+R12)/(R11−R12)≤2.28; and0.06≤d11/TTL≤0.19,wheref denotes a focal length of the camera optical lens;f6 denotes a focal length of the sixth lens;R11 denotes a curvature radius of the object side surface of the sixth lens;R12 denotes a curvature radius of the image side surface of the sixth lens;d11 denotes an on-axis thickness of the sixth lens; andTTL 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.

14. The camera optical lens as described in claim 13, further satisfying following conditions: −0.98≤f6/f≤−0.56;0.96≤(R11+R12)/(R11−R12)≤1.82; and0.09≤d11/TTL≤0.16.

15. The camera optical lens as described in claim 1, further satisfying a following condition: 0.46≤f12/f≤1.50,wheref denotes a focal length of the camera optical lens; andf12 denotes a combined focal length of the first lens and the second lens.

16. The camera optical lens as described in claim 15, further satisfying a following condition: 0.73≤f12/f≤1.20.

17. The camera optical lens as described in claim 1, wherein a total optical length TTL from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is smaller than or equal to 6.18 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 5.89 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 2.47.

20. The camera optical lens as described in claim 19, wherein the F number of the camera optical lens is smaller than or equal to 2.42.