Camera Lens

Information

  • Patent Application
  • 20200026040
  • Publication Number
    20200026040
  • Date Filed
    December 30, 2018
    5 years ago
  • Date Published
    January 23, 2020
    4 years ago
Abstract
The present disclosure provides a camera lens, constituted by eight lenses, and featuring excellent optical characteristics, an ultra-thin appearance, a wide angle and a bright Fno. The camera lens is configured with, sequentially from an object side: a 1st lens having a positive refractive power, a 2nd lens having a negative refractive power, a 3rd lens having a negative refractive power, a 4th lens having a positive refractive power, a 5th lens having a negative refractive power, a 6th lens having a positive refractive power, a 7th lens having a positive refractive power and an 8th lens having a negative refractive power, and satisfies specified conditional features.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Japanese Patent Applications Ser. No. 2018-137212 filed on Jul. 20, 2018, the entire content of which is incorporated herein by reference.


TECHNICAL FIELD

The present disclosure relates to camera lenses, and more particularly, to a camera lens, which is constituted by eight lenses, is applicable to a mobile phone camera assembly, a WEB camera lens or the like using camera elements such as a high-pixel CCD and a CMOS, and meanwhile has an excellent optical characteristic, an ultra-thin appearance with total track length (TTL)/image height ≤1.65, a wide angle with a field of view (hereinafter referred to as 2ω) of 70° or more, and an F-number (hereinafter briefly referred to as Fno) of 1.45 or less.


BACKGROUND

In recent years, various types of camera devices using camera elements such as a CCD and a CMOS have been widely applied. With miniaturization and high performance-oriented development of these camera elements, the society has a stronger demand for a camera lens with excellent optical characteristics, an ultra-thin appearance, a wide-angle and a bright Fno.


A camera lens which is constituted by eight lenses and has a bright Fno is provided in the related art.


In the disclosed camera lens in the related art, refractive powers of respective lenses from a 1st lens to an 8th lens are (positive, negative, positive, negative, positive, negative, negative, negative), (positive, negative, positive, negative, positive, positive, negative, negative), (positive, positive, negative, positive, negative, positive, negative, negative), or (positive, positive, negative, positive, positive, positive, negative, negative), so Fno=1.20˜1.60 which is bright, but TTL/IH>1.90 which is not ultra-thin enough.





BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 is a configuration diagram of a camera lens LA related to an embodiment of the present disclosure.



FIG. 2 is a configuration diagram of a specific Embodiment 1 of the camera lens LA.



FIG. 3 is an axial aberration diagram of the camera lens LA according to Embodiment 1.



FIG. 4 is a magnification chromatism diagram of the camera lens LA according to the Embodiment 1.



FIG. 5 is a field curvature and distortion diagram of the camera lens LA according to Embodiment 1.



FIG. 6 is a configuration diagram of a specific Embodiment 2 of the camera lens LA.



FIG. 7 is an axial aberration diagram of the camera lens LA according to Embodiment 2.



FIG. 8 is a magnification chromatism diagram of the camera lens LA according to Embodiment 2.



FIG. 9 is a field curvature and distortion diagram of the camera lens LA according to Embodiment 2.



FIG. 10 is a configuration diagram of a specific Embodiment 3 of the above-described camera lens LA.



FIG. 11 is an axial aberration diagram of the camera lens LA according to Embodiment 3.



FIG. 12 is a magnification chromatism diagram of the camera lens LA according to Embodiment 3.



FIG. 13 is a field curvature and distortion diagram of the camera lens LA according to Embodiment 3.



FIG. 14 is a configuration diagram of a specific Embodiment 4 of the camera lens LA.



FIG. 15 is an axial aberration diagram of the camera lens LA according to Embodiment 4.



FIG. 16 is a magnification chromatism diagram of the camera lens LA according to Embodiment 4.



FIG. 17 is a field curvature and distortion diagram of the camera lens LA according to Embodiment 4.



FIG. 18 is a configuration diagram of a specific embodiment 5 of the above-described camera lens LA.



FIG. 19 is an axial aberration diagram of the camera lens LA according to Embodiment 5.



FIG. 20 is a magnification chromatism diagram of the camera lens LA according to Embodiment 5.



FIG. 21 is a field curvature and distortion diagram of the camera lens LA according to Embodiment 5.



FIG. 22 is a configuration diagram of a specific embodiment 6 of the above-described camera lens LA.



FIG. 23 is an axial aberration diagram of the camera lens LA according to Embodiment 6.



FIG. 24 is a magnification chromatism diagram of the camera lens LA according to Embodiment 6.



FIG. 25 is a field curvature and distortion diagram of the camera lens LA according to Embodiment 6.





DETAILED DESCRIPTION

An embodiment of a camera lens related to the present disclosure will be described with reference to the accompanying drawings. FIG. 1 is a diagram showing a configuration of a camera lens according to an embodiment of the present disclosure. The camera lens LA is constituted by eight lens, and a 1st lens L1, a 2nd lens L2, a 3rd lens L3, a 4th lens L4, a 5th lens L5, a 6th lens L6, a 7th lens L7 and an 8th lens L8 are configured successively from an object side to an image side. A glass flatplate GF is provided between the 8th lens L8 and an image surface. The glass flatplate GF may be a glass cover sheet or an optical filter having an IR cut-off function. Or, the glass flatplate GF may not be provided between the 8th lens L8 and the image surface.


The 1st lens L1 has a positive refractive power, the 2nd lens L2 has a negative refractive power, the 3rd lens L3 has a negative refractive power, the 4th lens L4 has a positive refractive power, the 5th lens L5 has a negative refractive power, the 6th lens L6 has a positive refractive power, the 7th lens L7 has a positive refractive power, and the 8th lens L8 has a negative refractive power. In order to better correct an aberration problem, it is most preferable to design surfaces of the eight lenses as aspherical.


The camera lens LA satisfies conditional formulas (1)-(2) below:





35.00≤v1−v2≤50.00   (1);





35.00≤v1−v3≤50.00   (2);


Where,


v1: Abbe number of the 1st lens L1;


v1: Abbe number of the 2nd lens L2;


v1: Abbe number of the 3rd lens L3;


The conditional formula (1) specifies a difference between the Abbe number v1 of the 1st lens L1 and the Abbe number v2 of the 2nd lens L2. Outside a range of the conditional formula (1), it is difficult to correct on-axis and off-axis color, and aberration, with Fno≤1.45.


Here, it is most preferable to set a numerical range of the conditional formula (1) within a numerical range of a conditional formula (1-A) below:





35.00≤v1−v2≤41.00   (1-A).


The conditional formula (2) specifies a difference between the Abbe number v1 of the 1st lens L1 and the Abbe number v3 of the 3rd lens L3. Outside a range of the conditional formula (2), it is difficult to correct on-axis and off-axis color, and aberration, with Fno≤1.45.


Here, it is most preferable to set a numerical range of the conditional formula (2) within a numerical range of a conditional formula (2-A) below:





35.00≤v1−v3≤41.00   (2-A).


The 1st lens L1 has a positive refractive power and satisfies a conditional formula (3) below:





1.00'f1/f≤1.50   (3).


Where,


f: the focal length of the overall camera lens;


f1: a focal length of the 1st lens.


The conditional formula (3) specifies a positive refractive power of the 1st lens L1. Outside a range of the conditional formula (3), it is difficult to develop toward ultra-thinness and wide-angle with Fno≤1.45.


Here, it is most preferable to set a numerical range of the conditional formula (3) within a numerical range of a conditional formula (3-A) below:





1.05≤f1/f≤1.20   (3-A).


The 2nd lens L2 has a negative refractive power and satisfies a conditional formula (4) below:





−8.00≤f2/f≤−5.00   (4).


Where,


f: the focal length of the overall camera lens;


f2: a focal length of the 2nd lens.


The conditional formula (4) specifies a negative refractive power of the 2nd lens L1. Outside a range of the conditional formula (4), it is difficult to correct on-axis and off-axis color, and aberration, with Fno≤1.45.


Here, it is most preferable to set a numerical range of the conditional formula (4) within a numerical range of a conditional formula (4-A) below:





−7.00≤f2/f≤−6.00   (4-A).


The 3rd lens L3 has a negative refractive power and satisfies a conditional formula (5) below:





−8.00≤f3/f≤−5.00   (5).


Where,


f: the focal length of the overall camera lens;


f3: a focal length of the 3rd lens.


The conditional formula (5) specifies a negative refractive power of the 3rd lens L1. Outside a range of the conditional formula (5), it is difficult to correct on-axis and off-axis color, and aberration, with Fno≤1.45.


Here, it is most preferable to set a numerical range of the conditional formula (5) within a numerical range of a conditional formula (5-A) below:





−7.00≤f3/f≤−6.00   (5-A).


The 7th lens L7 has a positive refractive power and satisfies a conditional formula (6) below:





0.30≤f7/f≤1.50   (6).


Where,


f: the focal length of the overall camera lens;


f7: a focal length of the 7th lens.


The conditional formula (6) specifies a positive refractive power of the 7th lens L7. Outside a range of the conditional formula (6), it is difficult to develop toward ultra-thinness and wide-angle with Fno≤1.45.


Here, it is most preferable to set a numerical range of the conditional formula (6) within a numerical range of a conditional formula (6-A) below:





0.60≤f7/f≤0.80   (6-A).


The 8th lens L8 has a negative refractive power and satisfies a conditional formula (7) below:





−1.00≤f8/f≤−0.30   (7).


Where,


f: the focal length of the overall camera lens;


f8: a focal length of the 8th lens.


The conditional formula (7) specifies a negative refractive power of the 8th lens L8. Outside a range of the conditional formula (7), it is difficult to develop toward ultra-thinness and wide-angle with Fno≤1.45.


Here, it is most preferable to set a numerical range of the conditional formula (7) within a numerical range of a conditional formula (7-A) below:





−0.70≤f8/f≤−0.50   (7-A).


The eight lenses constituting the camera lens LA respectively satisfy the configurations and the conditional formulas as described above, which makes it possible to fabricate the camera lens having an excellent optical characteristic, an ultra-thin appearance with total track length (TTL)/image height (IH)≤1.65, a wide angle with 2ω≥70°, and an Fno with Fno≤1.45.


Hereinafter, the camera lens LA according to the present disclosure will be described with embodiments. Symbols recited in the respective embodiments are shown below. Distance, radius and center thickness are in units of mm.


f: an overall focal length of the camera lens LA;


f1: a focal length of a 1st lens L1;


f2: a focal length of a 2nd lens L2;


f3: a focal length of a 3rd lens L3;


f4: a focal length of a 4th lens L4;


f5: a focal length of a 5th lens L5;


f6: a focal length of a 6th lens L6;


f7: a focal length of a 7th lens L7;


f8: a focal length of an 8th lens L8;


Fno: F number;


2ω: field of view;


STOP: STOP;


S1: stop 1;


S2: stop 2;


S3: stop 3;


R: a curvature radius of an optical surface, and a central curvature radius in a case of a lens;


R1: a curvature radius of an object side surface of the 1st lens L1;


R2: a curvature radius of an image side surface of the 1st lens L1;


R3: a curvature radius of an object side surface of the 2nd lens L2;


R4: a curvature radius of an image side surface of the 2nd lens L2;


R5: a curvature radius of an object side surface of the 3rd lens L3;


R6: a curvature radius of an image side surface of the 3rd lens L3;


R7: a curvature radius of an object side surface of the 4th lens L4;


R8: a curvature radius of an image side surface of the 4th lens L4;


R9: a curvature radius of an object side surface of the 5th lens L5;


R10: a curvature radius of an image side surface of the 5th lens L5;


R11: a curvature radius of an object side surface of the 6th lens L6;


R12: a curvature radius of an image side surface of the 6th lens L6;


R13: a curvature radius of an object side surface of the 7th lens L7;


R14: a curvature radius of an image side surface of the 7th lens L7;


R15: a curvature radius of an object side surface of the 8th lens L8;


R16: a curvature radius of an image side surface of the 8th lens L8;


R17: a curvature radius of an object side surface of a glass flatplate GF;


R18: a curvature radius of an image side surface of the glass flatplate GF;


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


d1: a center thickness of the 1st lens L1;


d2: a distance from the image side surface of the 1st lens L1 to the object side surface of the 2nd lens L2;


d3: a center thickness of the 2nd lens L2;


d4: an on-axis distance from the image side surface of the 2nd lens L2 to the object side surface of the 3rd lens L3;


d5: a center thickness of the 3rd lens L3;


d6: an on-axis distance from the image side surface of the 3rd lens L3 to the object side surface of the 4th lens L4;


d7: a center thickness of the 4th lens L4;


d8: an on-axis distance from the image side surface of the 4th lens L4 to the object side surface of the 5th lens L5;


d9: a center thickness of the 5th lens L5;


d10: an on-axis distance from the image side surface of the 5th lens L5 to the object side surface of the 6th lens L6;


d11: a center thickness of the 6th lens L6;


d12: an on-axis distance from the image side surface of the 6th lens L6 to the object side surface of the 7th lens L7;


d13: a center thickness of the 7th lens L7;


d14: an on-axis distance from the image side surface of the 7th lens L7 to the object side surface of the 8th lens L8;


d15: a center thickness of the 8th lens L8;


d16: an on-axis distance from the image side surface of the 8th lens L8 to the object side surface of the glass flatplate GF;


d17: a center thickness of the glass flatplate GF;


d18: an on-axis distance from the image side surface of the glass flatplate GF to an image surface;


nd: a refractive index of d line;


nd1: a refractive index of d line of the 1st lens L1;


nd2: a refractive index of d line of the 2nd lens L2;


nd3: a refractive index of d line of the 3rd lens L3;


nd4: a refractive index of d line of the 4th lens L4;


nd5: a refractive index of d line of the 5th lens L5;


nd6: a refractive index of d line of the 6th lens L6;


nd7: a refractive index of d line of the 7th lens L7;


nd8: a refractive index of d line of the 8th lens L8;


nd9: a refractive index of d line of the glass flatplate GF;


vd: Abbe number;


v1: Abbe number of the 1st lens L1;


v2: Abbe number of the 2nd lens L2;


v3: Abbe number of the 3rd lens L3;


v4: Abbe number of the 4th lens L4;


v5: Abbe number of the 5th lens L5;


v6: Abbe number of the 6th lens L6;


v7: Abbe number of the 7th lens L7;


v8: Abbe number of the 8th lens L8;


v9: Abbe number of the glass flatplate GF;


TTL: a total track length (an on-axis distance from the object side surface of the 1st lens L1 to the image surface);


LB: an on-axis distance from the image side surface of the 8th lens L8 to the image surface (including a thickness of the glass flatplate GF).






y=(x2/R)/[1+{1−(k+1)(x2/R2)}1/2+A6x6+A8x8+A10x10+A12x12+A14x14+A16x16   (8)


R is an on-axis curvature radius, k is a conic coefficient, A4, A6, A8, A10, A12, A14 and A16 are aspherical coefficients.


For the sake of convenience, the aspherical surface shown in formula (8) is taken as aspheric surfaces of respective lens surfaces. However, the present disclosure is not limited to an aspherical polynomial form expressed by formula (8).


Embodiment 1


FIG. 2 is a diagram showing a configuration of a camera lens LA according to Embodiment 1. Data in Table 1 includes: curvature radius R of object side surfaces and image side surfaces of a 1st lens L1 to an 8th lens L8 constituting the camera lens LA according to Embodiment 1, a center thickness of a lens and a distance d between lenses, refractive index nd, Abbe number vd and effective radius. Data in Table 2 includes: conic coefficient k and aspherical coefficient. Data in Table 3 includes: 2ω, f, f1, f2, f3, f4, f5, f6, f7, f8, TTL, IH and TTL/IH.















TABLE 1







R (mm)
d (mm)
nd
νd
Effective radius (mm)
























S1


−0.600




1.800


R1
2.3242
d1
1.105
nd1
1.5831
ν1
59.39
1.780


R2
7.1205
d2
0.045




1.667


STOP


0.049




1.653


R3
7.4847
d3
0.186
nd2
1.6613
ν2
20.37
1.583


R4
5.5774
d4
0.205




1.475


S2


−0.160




1.460


R5
5.5740
d5
0.180
nd3
1.6509
ν3
21.52
1.462


R6
4.3500
d6
0.441




1.432


R7
6.9834
d7
0.517
nd4
1.5439
ν4
55.95
1.490


R8
10.1662
d8
0.367




1.635


R9
4.7548
d9
0.292
nd5
1.6397
ν5
23.53
1.706


R10
3.6307
d10
0.129




1.951


R11
−13.3965
d11
0.298
nd6
1.5439
ν6
55.95
2.026


R12
−8.8321
d12
−0.450




2.222


S3


0.568




2.240


R13
5.3062
d13
0.844
nd7
1.5439
ν7
55.95
2.380


R14
−2.9560
d14
0.399




2.727


R15
−4.7717
d15
0.309
nd8
1.5352
ν8
56.12
3.107


R16
2.3786
d16
0.550




3.353


R17

d17
0.210
nd9
1.5168
ν9
64.17
3.766


R18

d18
0.295




3.820



















TABLE 2









Conic coefficient
Aspheric coefficient
















k
A4
A6
A8
A10
A12
A14
A16



















R1
−3.2014E−01
−1.4544E−04
4.4451E−03
−4.6724E−03
2.8111E−03
−9.7712E−04
1.8345E−04
−1.9466E−05


R2
5.5575E+00
−6.2816E−02
3.0919E−02
−3.1238E−03
−4.4264E−03
1.8821E−03
−2.7609E−04
9.4175E−06


R3
8.6375E+00
−8.6818E−02
5.5014E−02
−8.0669E−03
−7.6374E−03
4.2109E−03
−7.3769E−04
3.8810E−05


R4
−3.2543E+00
−1.2413E−03
−1.2393E−03
−6.8674E−04
−1.1030E−06
1.0007E−04
4.2387E−05
−2.0060E−06


R5
4.8405E−03
3.5462E−05
−3.3023E−05
2.2901E−04
5.9860E−05
−3.1933E−05
−2.4337E−05
7.1251E−06


R6
6.5289E+00
−4.3685E−02
3.3245E−02
−1.8013E−03
−7.5919E−03
3.8888E−03
−4.5261E−04
−6.5739E−05


R7
−4.7158E+01
−2.3374E−02
−5.2733E−03
1.2948E−02
−2.3619E−02
1.9421E−02
−7.7925E−03
1.2296E−03


R8
−6.0793E+00
−5.1653E−02
1.6297E−02
−1.2290E−02
2.3545E−03
1.5183E−04
−1.5804E−04
1.3738E−05


R9
−2.8029E+01
−1.0704E−01
4.1998E−02
−1.8052E−02
5.8877E−03
−2.3582E−03
7.0293E−04
−9.6023E−05


R10
−2.7076E+01
−8.5543E−02
1.5527E−02
2.7086E−03
−3.7215E−03
1.3740E−03
−2.4953E−04
1.9721E−05


R11
−4.0424E+01
1.1716E−03
−6.6739E−04
−4.4876E−04
−1.3996E−04
−8.7495E−06
2.1526E−07
1.0644E−06


R12
1.0895E+01
−3.1866E−03
−3.4863E−04
−8.1124E−05
−1.8738E−05
2.4336E−06
5.9661E−08
2.3225E−07


R13
−1.9509E+01
−2.0832E−03
−1.3915E−02
5.5677E−03
−2.0363E−03
4.5795E−04
−5.4068E−05
2.7476E−06


R14
−1.7258E+01
1.0684E−02
2.2332E−03
−2.9683E−03
7.0165E−04
−8.0554E−05
4.4206E−06
−8.4147E−08


R15
−7.9357E−01
−5.6471E−02
1.9904E−02
−3.5459E−03
4.0698E−04
−2.8632E−05
1.1181E−06
−1.8720E−08


R16
−1.4273E+01
−3.5512E−02
9.3180E−03
−1.7842E−03
1.9824E−04
−1.2579E−05
4.2838E−07
−5.4688E−09



















TABLE 3









2ω (°)
73.6



Fno
1.27



f (mm)
5.162



f1 (mm)
5.455



f2 (mm)
−34.467



f3 (mm)
−32.337



f4 (mm)
38.791



f5 (mm)
−26.735



f6 (mm)
46.588



f7 (mm)
3.621



f8 (mm)
−2.925



TTL (mm)
6.380



LB (mm)
1.055



IH (mm)
3.928



TTL/IH
1.624










Table 19 presented later on shows values corresponding to parameters specified in the conditional formulas (1) to (7) according to Embodiment 1 to Embodiment 6.


As shown in Table 19, Embodiment 1 satisfies the conditional formulas (1) to (7).


Axial aberration of the camera lens LA according to Embodiment 1 is shown in FIG. 3, magnification chromatism is shown in FIG. 4, and field curvature and distortion is shown in FIG. 5. Further, field curvature S of FIG. 5 is a field curvature opposite to a sagittal image surface, and T is a field curvature opposite to a meridional image surface. So are they in Embodiments 2 to 6. As shown in Table 3, the camera lens LA according to Embodiment 1 has a wide angle, an ultra-thin appearance, and a bright Fno, as shown in FIG. 3 to FIG. 5, which makes it not difficult to understand that it has an excellent optical characteristic.


Embodiment 2


FIG. 6 is a diagram showing a configuration of a camera lens LA according to Embodiment 2. Data in Table 4 includes: curvature radius R of object sides and image sides of a 1st lens L1 to an 8th lens L8 constituting the camera lens LA according to Embodiment 2, center thickness of a lens, and on-axis distance d between lenses, refractive index nd, Abbe number vd and effective radius. Data in Table 5 includes: conic coefficient k and aspherical coefficient. Data in Table 6 includes: 2ω, f, f1, f2, f3, f4, f5, f6, f7, f8, TTL, IH and TTL/IH.















TABLE 4







R (mm)
d (mm)
nd
νd
Effective radius (mm)
























S1


−0.600




1.800


R1
2.3562
d1
1.121
nd1
1.5831
ν1
59.39
1.790


R2
7.4516
d2
0.053




1.708


STOP


0.044




1.679


R3
7.6478
d3
0.184
nd2
1.6613
ν2
20.37
1.609


R4
5.6617
d4
0.219




1.490


S2


−0.170




1.470


R5
5.6075
d5
0.180
nd3
1.6509
ν3
21.52
1.471


R6
4.3616
d6
0.447




1.452


R7
7.0869
d7
0.504
nd4
1.5439
ν4
55.95
1.502


R8
9.9430
d8
0.341




1.631


R9
4.3691
d9
0.288
nd5
1.6397
ν5
23.53
1.707


R10
3.1310
d10
0.122




1.935


R11
−12.5054
d11
0.325
nd6
1.5439
ν6
55.95
2.043


R12
−8.2593
d12
−0.400




2.207


S3


0.497




2.300


R13
3.8772
d13
0.836
nd7
1.5439
ν7
55.95
2.337


R14
−3.0399
d14
0.360




2.659


R15
−4.4823
d15
0.314
nd8
1.5352
ν8
56.12
3.027


R16
2.4170
d16
0.550




3.335


R17

d17
0.210
nd9
1.5168
ν9
64.17
3.738


R18

d18
0.317




3.795



















TABLE 5









Conic coefficient
Aspheric coefficient
















k
A4
A6
A8
A10
A12
A14
A16



















R1
−3.2216E−01
−9.7789E−05
4.4153E−03
−4.7015E−03
2.8077E−03
−9.7356E−04
1.8444E−04
−1.9562E−05


R2
5.7097E+00
−6.2722E−02
3.0842E−02
−3.1540E−03
−4.4346E−03
1.8842E−03
−2.7511E−04
9.5330E−06


R3
8.6335E+00
−8.7229E−02
5.5087E−02
−8.0412E−03
−7.6378E−03
4.1999E−03
−7.3939E−04
4.0958E−05


R4
−3.9933E+00
−1.2684E−03
−1.1423E−03
−7.0368E−04
−8.8672E−06
1.0845E−04
4.6015E−05
5.4879E−07


R5
−1.5771E+00
−9.6436E−04
−5.6161E−04
3.6493E−05
7.0541E−05
−9.3873E−06
−2.0916E−05
4.6118E−06


R6
6.2493E+00
−4.5508E−02
3.2984E−02
−1.6945E−03
−7.6043E−03
3.8378E−03
−4.6940E−04
−5.6367E−05


R7
−5.4823E+01
−2.2949E−02
−5.3848E−03
1.2632E−02
−2.3675E−02
1.9507E−02
−7.7619E−03
1.2048E−03


R8
−1.9084E+00
−5.1188E−02
1.5785E−02
−1.2356E−02
2.3553E−03
1.3284E−04
−1.6479E−04
1.7633E−05


R9
−3.7963E+01
−1.0563E−01
4.3064E−02
−1.8104E−02
5.7359E−03
−2.3666E−03
7.1084E−04
−9.1357E−05


R10
−3.6227E+01
−8.6624E−02
1.5836E−02
2.7993E−03
−3.7310E−03
1.3651E−03
−2.5008E−04
2.0537E−05


R11
−7.0816E+01
2.6344E−03
−1.9215E−04
−4.5418E−04
−1.5565E−04
−1.0852E−05
2.7177E−07
1.3950E−06


R12
9.8526E+00
−2.7804E−03
−1.5696E−04
−6.1795E−05
−2.3670E−05
6.9610E−07
5.9274E−08
2.7480E−07


R13
−2.5120E+01
−1.0275E−03
−1.4235E−02
5.5368E−03
−2.0339E−03
4.5811E−04
−5.4036E−05
2.7395E−06


R14
−1.2606E+01
1.1061E−02
2.3137E−03
−3.0177E−03
7.0024E−04
−8.0346E−05
4.4460E−06
−8.5562E−08


R15
−8.8444E−01
−5.6416E−02
1.9948E−02
−3.5432E−03
4.0708E−04
−2.8637E−05
1.1159E−06
−1.8720E−08


R16
−1.2022E+01
−3.4824E−02
9.2426E−03
−1.7839E−03
1.9850E−04
−1.2565E−05
4.2757E−07
−5.5695E−09



















TABLE 6









2ω (°)
75.1



Fno
1.23



f (mm)
5.086



f1 (mm)
5.466



f2 (mm)
−34.263



f3 (mm)
−32.009



f4 (mm)
42.709



f5 (mm)
−19.014



f6 (mm)
43.550



f7 (mm)
3.272



f8 (mm)
−2.891



TTL (mm)
6.341



LB (mm)
1.077



IH (mm)
3.928



TTL/IH
1.614










As shown in Table 19, Embodiment 2 satisfies the conditional formulas (1) to (7).


Axial aberration of the camera lens LA according to Embodiment 2 is shown in FIG. 7, magnification chromatism is shown in FIG. 8, and field curvature and distortion is shown in FIG. 9. As shown in Table 6, the camera lens LA according to Embodiment 2 has a wide angle, an ultra-thin appearance and a bright Fno, as shown in FIG. 7 to FIG. 9, which makes it not difficult to understand that it has an excellent optical characteristic.


Embodiment 3


FIG. 10 is a diagram showing a configuration of a camera lens LA according to Embodiment 3. Data in Table 7 includes: curvature radius R of object sides and image sides of a 1st lens L1 to an 8th lens L8 constituting the camera lens LA according to Embodiment 3, center thickness of a lens and on-axis distance d between lenses, refractive index nd, Abbe number vd and effective radius. Data in Table 8 includes: conic coefficient k and aspherical coefficient. Data in Table 9 includes: 2ω, f, f1, f2, f3, f4, f5, f6, f7, f8, TTL, IH and TTL/IH.















TABLE 7







R (mm)
d (mm)
nd
νd
Effective radius (mm)
























S1


−0.600




1.800


R1
2.3264
d1
1.098
nd1
1.5831
ν1
59.39
1.770


R2
7.1031
d2
0.055




1.642


STOP


0.039




1.624


R3
7.5207
d3
0.187
nd2
1.6613
ν2
20.37
1.565


R4
5.5761
d4
0.209




1.458


S2


−0.160




1.440


R5
5.5775
d5
0.180
nd3
1.6509
ν3
21.52
1.443


R6
4.3452
d6
0.420




1.418


R7
7.0004
d7
0.520
nd4
1.5439
ν4
55.95
1.474


R8
10.1124
d8
0.359




1.627


R9
4.7362
d9
0.293
nd5
1.6397
ν5
23.53
1.701


R10
3.6338
d10
0.139




1.946


R11
−13.6377
d11
0.296
nd6
1.5439
ν6
55.95
2.018


R12
−8.7437
d12
−0.450




2.213


S3


0.569




2.240


R13
5.2988
d13
0.865
nd7
1.5439
ν7
55.95
2.379


R14
−2.9228
d14
0.409




2.762


R15
−4.7340
d15
0.285
nd8
1.5352
ν8
56.12
3.180


R16
2.3556
d16
0.550




3.366


R17

d17
0.210
nd9
1.5168
ν9
64.17
3.772


R18

d18
0.308




3.825



















TABLE 8









Conic coefficient
Aspheric coefficient
















k
A4
A6
A8
A10
A12
A14
A16



















R1
−3.1784E−01
−1.3784E−04
4.4795E−03
−4.6697E−03
2.8100E−03
−9.7735E−04
1.8357E−04
−1.9327E−05


R2
5.6279E+00
−6.2798E−02
3.0944E−02
−3.1145E−03
−4.4255E−03
1.8818E−03
−2.7608E−04
9.5882E−06


R3
8.4979E+00
−8.6860E−02
5.4970E−02
−8.0870E−03
−7.6404E−03
4.2116E−03
−7.3727E−04
3.8690E−05


R4
−3.4170E+00
−1.3327E−03
−1.2655E−03
−6.8259E−04
−1.0649E−06
9.8043E−05
4.1237E−05
−2.1251E−06


R5
2.4192E−01
2.2351E−04
2.9103E−05
2.2678E−04
5.5580E−05
−3.2582E−05
−2.3998E−05
7.1983E−06


R6
6.5477E+00
−4.3781E−02
3.3163E−02
−1.7966E−03
−7.5814E−03
3.8919E−03
−4.5311E−04
−6.6769E−05


R7
−4.9447E+01
−2.3312E−02
−5.2008E−03
1.2950E−02
−2.3634E−02
1.9412E−02
−7.7921E−03
1.2341E−03


R8
−5.5782E+00
−5.1590E−02
1.6319E−02
−1.2293E−02
2.3520E−03
1.5220E−04
−1.5810E−04
1.3003E−05


R9
−2.7515E+01
−1.0709E−01
4.1922E−02
−1.8031E−02
5.9134E−03
−2.3494E−03
7.0324E−04
−9.7362E−05


R10
−2.6179E+01
−8.5438E−02
1.5529E−02
2.7107E−03
−3.7187E−03
1.3751E−03
−2.4949E−04
1.9553E−05


R11
−4.6409E+01
1.1335E−03
−7.6145E−04
−4.6049E−04
−1.3787E−04
−7.4113E−06
1.6844E−07
8.6313E−07


R12
1.1214E+01
−3.3491E−03
−3.5839E−04
−7.6728E−05
−1.7137E−05
2.6747E−06
5.5881E−08
2.2055E−07


R13
−1.7531E+01
−2.0831E−03
−1.3907E−02
5.5665E−03
−2.0370E−03
4.5785E−04
−5.4076E−05
2.7476E−06


R14
−1.7768E+01
1.1139E−02
2.2786E−03
−2.9650E−03
7.0140E−04
−8.0598E−05
4.4229E−06
−8.2427E−08


R15
−8.3041E−01
−5.6416E−02
1.9901E−02
−3.5460E−03
4.0700E−04
−2.8628E−05
1.1184E−06
−1.8708E−08


R16
−1.4663E+01
−3.5937E−02
9.3339E−03
−1.7833E−03
1.9825E−04
−1.2578E−05
4.2864E−07
−5.4289E−09



















TABLE 9









2ω (°)
73.5



Fno
1.29



f (mm)
5.156



f1 (mm)
5.470



f2 (mm)
−33.943



f3 (mm)
−32.091



f4 (mm)
39.497



f5 (mm)
−27.254



f6 (mm)
43.863



f7 (mm)
3.597



f8 (mm)
−2.901



TTL (mm)
6.380



LB (mm)
1.068



IH (mm)
3.928



TTL/IH
1.624










As shown in Table 19, Embodiment 3 satisfies the conditional formulas (1) to (7).


Axial aberration of the camera lens LA according to Embodiment 3 is shown in FIG. 11, magnification chromatism is shown in FIG. 12, and field curvature and distortion is shown in FIG. 13. As shown in Table 9, the camera lens LA according to Embodiment 3 has a wide angle, an ultra-thin appearance and a bright Fno, as shown in FIG. 11 to FIG. 13, which makes it not difficult to understand that it has an excellent optical characteristic.


Embodiment 4


FIG. 14 is a diagram showing a configuration of a camera lens LA according to Embodiment 4. Data in Table 10 includes: curvature radius R of object sides and image sides of a 1st lens L1 to an 8th lens L8 constituting the camera lens LA according to Embodiment 4, center thickness of a lens and on-axis distance d between lenses, refractive index nd, Abbe number vd and effective radius. Data in Table 11 includes: conic coefficient k and aspherical coefficient. Data in Table 12 includes: 2ω, f, f1, f2, f3, f4, f5, f6, f7, f8, TTL, IH and TTL/IH.















TABLE 10







R (mm)
d (mm)
nd
νd
Effective radius (mm)
























S1


−0.600




1.800


R1
2.3294
d1
1.112
nd1
1.5831
ν1
59.39
1.780


R2
7.1824
d2
0.045




1.676


STOP


0.048




1.658


R3
7.4766
d3
0.186
nd2
1.6613
ν2
20.37
1.593


R4
5.5786
d4
0.211




1.485


S2


−0.170




1.470


R5
5.5883
d5
0.180
nd3
1.6509
ν3
21.52
1.471


R6
4.3661
d6
0.452




1.441


R7
7.0778
d7
0.516
nd4
1.5439
ν4
55.95
1.498


R8
10.3471
d8
0.367




1.640


R9
4.8832
d9
0.296
nd5
1.6397
ν5
23.53
1.709


R10
3.6660
d10
0.119




1.955


R11
−13.2851
d11
0.308
nd6
1.5439
ν6
55.95
2.043


R12
−8.8147
d12
−0.450




2.237


S3


0.566




2.240


R13
4.9976
d13
0.832
nd7
1.5439
ν7
55.95
2.383


R14
−2.9782
d14
0.388




2.718


R15
−4.7616
d15
0.311
nd8
1.5352
ν8
56.12
3.125


R16
2.3847
d16
0.550




3.366


R17

d17
0.210
nd9
1.5168
ν9
64.17
3.769


R18

d18
0.296




3.824



















TABLE 11









Conic coefficient
Aspheric coefficient
















k
A4
A6
A8
A10
A12
A14
A16



















R1
−3.2002E−01
−6.3006E−05
4.4062E−03
−4.6779E−03
2.8119E−03
−9.7664E−04
1.8349E−04
−1.9530E−05


R2
5.4177E+00
−6.2847E−02
3.0888E−02
−3.1318E−03
−4.4276E−03
1.8824E−03
−2.7595E−04
9.3832E−06


R3
8.7248E+00
−8.6838E−02
5.5050E−02
−8.0497E−03
−7.6355E−03
4.2099E−03
−7.3812E−04
3.8940E−05


R4
−3.0008E+00
−1.0831E−03
−1.1888E−03
−6.8025E−04
5.0959E−06
1.0389E−04
4.3959E−05
−1.8338E−06


R5
−2.7767E−01
−2.0554E−04
−1.1316E−04
2.2489E−04
6.1961E−05
−3.1435E−05
−2.3957E−05
7.6194E−06


R6
6.4804E+00
−4.3661E−02
3.3309E−02
−1.8099E−03
−7.6024E−03
3.8871E−03
−4.5117E−04
−6.4209E−05


R7
−4.7211E+01
−2.3417E−02
−5.3066E−03
1.2943E−02
−2.3603E−02
1.9433E−02
−7.7933E−03
1.2240E−03


R8
−5.8494E+00
−5.1658E−02
1.6238E−02
−1.2297E−02
2.3488E−03
1.4669E−04
−1.5920E−04
1.4715E−05


R9
−2.8476E+01
−1.0685E−01
4.2145E−02
−1.8070E−02
5.8579E−03
−2.3672E−03
7.0338E−04
−9.4240E−05


R10
−2.9030E+01
−8.5683E−02
1.5573E−02
2.7165E−03
−3.7247E−03
1.3727E−03
−2.4959E−04
1.9916E−05


R11
−4.0167E+01
1.4037E−03
−4.9285E−04
−4.2997E−04
−1.4370E−04
−1.0235E−05
3.2008E−07
1.3252E−06


R12
1.0329E+01
−2.9714E−03
−2.9786E−04
−7.9101E−05
−2.0299E−05
2.2319E−06
6.6951E−08
2.4587E−07


R13
−2.0959E+01
−1.8843E−03
−1.3969E−02
5.5633E−03
−2.0359E−03
4.5808E−04
−5.4058E−05
2.7472E−06


R14
−1.6707E+01
1.0566E−02
2.2278E−03
−2.9760E−03
7.0156E−04
−8.0457E−05
4.4308E−06
−8.5182E−08


R15
−7.8573E−01
−5.6473E−02
1.9916E−02
−3.5453E−03
4.0698E−04
−2.8635E−05
1.1179E−06
−1.8710E−08


R16
−1.3690E+01
−3.5142E−02
9.2960E−03
−1.7846E−03
1.9832E−04
−1.2577E−05
4.2831E−07
−5.5036E−09



















TABLE 12









2ω (°)
73.8



Fno
1.26



f (mm)
5.142



f1 (mm)
5.452



f2 (mm)
−34.611



f3 (mm)
−32.591



f4 (mm)
39.015



f5 (mm)
−25.422



f6 (mm)
47.020



f7 (mm)
3.562



f8 (mm)
−2.927



TTL (mm)
6.374



LB (mm)
1.056



IH (mm)
3.928



TTL/IH
1.623










As shown in Table 19, Embodiment 4 satisfies the conditional formulas (1) to (7).


Axial aberration of the camera lens LA according to Embodiment 4 is shown in FIG. 15, magnification chromatism is shown in FIG. 16, and field curvature and distortion is shown in FIG. 17. As shown in Table 12, the camera lens LA according to Embodiment 4 has a wide angle, an ultra-thin appearance and a bright Fno, as shown in FIG. 15 to FIG. 17, which makes it not difficult to understand that it has an excellent optical characteristic.


Embodiment 5


FIG. 18 is a diagram showing a configuration of a camera lens LA according to Embodiment 5. Data in Table 13 includes: curvature radius R of object sides and image sides of a 1st lens L1 to an 8th lens L8 constituting the camera lens LA according to Embodiment 5, center thickness of a lens and on-axis distance d between lenses, refractive index nd, Abbe number vd and effective radius. Data in Table 14 includes: conic coefficient k and aspherical coefficient. Data in Table 15 includes: 2ω, f, f1, f2, f3, f4, f5, f6, f7, f8, TTL, IH and TTL/IH.















TABLE 13







R (mm)
d (mm)
nd
νd
Effective radius (mm)
























STOP


−0.480




1.742


R1
2.2596
d1
0.991
nd1
1.5831
ν1
59.39
1.742


R2
6.6994
d2
0.066




1.710


S1


0.030




1.680


R3
7.5614
d3
0.191
nd2
1.6613
ν2
20.37
1.598


R4
5.4284
d4
0.209




1.487


S2


−0.150




1.480


R5
5.8031
d5
0.190
nd3
1.6509
ν3
21.52
1.478


R6
4.4714
d6
0.394




1.435


R7
7.6590
d7
0.542
nd4
1.5439
ν4
55.95
1.447


R8
12.6607
d8
0.324




1.604


R9
5.8684
d9
0.307
nd5
1.6397
ν5
23.53
1.675


R10
5.3574
d10
0.111




1.903


R11
−10.9022
d11
0.248
nd6
1.5439
ν6
55.95
2.066


R12
−10.2802
d12
−0.200




2.218


S3


0.412




2.250


R13
5.9187
d13
0.806
nd7
1.5439
ν7
55.95
2.314


R14
−2.8415
d14
0.419




2.656


R15
−5.4221
d15
0.321
nd8
1.5352
ν8
56.12
2.951


R16
2.1997
d16
0.550




3.303


R17

d17
0.210
nd9
1.5168
ν9
64.17
3.712


R18

d18
0.326




3.771



















TABLE 14









Conic coefficient
Aspheric coefficient
















k
A4
A6
A8
A10
A12
A14
A16



















R1
−3.2808E−01
−3.3457E−04
4.5148E−03
−4.6633E−03
2.7759E−03
−9.9589E−04
1.7597E−04
−2.1199E−05


R2
4.2124E+00
−6.4414E−02
3.0884E−02
−3.2310E−03
−4.4336E−03
1.8753E−03
−2.7836E−04
9.0225E−06


R3
1.0211E+01
−8.5320E−02
5.5686E−02
−8.0994E−03
−7.5478E−03
4.2448E−03
−7.3445E−04
3.2933E−05


R4
−1.1357E+00
−5.4578E−04
−6.1643E−04
−2.5112E−04
−3.5099E−05
4.1237E−05
2.7716E−05
−4.2270E−07


R5
3.8518E−01
2.0023E−04
2.7428E−04
6.2523E−05
−8.4141E−06
−4.4683E−05
−1.9285E−05
−7.5831E−08


R6
6.7941E+00
−3.9701E−02
3.3100E−02
−1.6937E−03
−7.2391E−03
4.1265E−03
−4.5933E−04
−1.1072E−04


R7
−8.2926E+01
−2.4389E−02
−3.7177E−03
1.3166E−02
−2.3630E−02
1.9384E−02
−7.8099E−03
1.2430E−03


R8
−5.8433E+01
−5.2219E−02
1.7419E−02
−1.2080E−02
2.3226E−03
1.1435E−04
−1.7127E−04
1.0150E−05


R9
−2.7118E+01
−1.0495E−01
4.2980E−02
−1.8623E−02
5.8470E−03
−2.2735E−03
7.0128E−04
−1.0443E−04


R10
−4.5593E+01
−8.6773E−02
1.4984E−02
2.8575E−03
−3.5980E−03
1.3924E−03
−2.4825E−04
1.7221E−05


R11
1.8450E+00
−2.0229E−04
−3.0887E−04
−7.2986E−05
−1.3625E−05
−6.8453E−07
1.7365E−07
8.9029E−08


R12
1.9619E+00
−5.5564E−04
−7.3103E−06
8.4622E−06
1.7391E−06
−1.2970E−07
−6.2116E−08
−1.4933E−08


R13
−1.2682E+01
−2.5051E−04
−1.2610E−02
5.4834E−03
−2.0503E−03
4.5322E−04
−5.4405E−05
2.8737E−06


R14
−1.6217E+01
1.5119E−02
1.9726E−03
−3.0493E−03
7.0553E−04
−7.9409E−05
4.4579E−06
−9.2806E−08


R15
−1.4022E+00
−5.5740E−02
1.9710E−02
−3.5458E−03
4.0766E−04
−2.8667E−05
1.1189E−06
−1.8965E−08


R16
−1.2186E+01
−3.5751E−02
9.5477E−03
−1.7880E−03
1.9680E−04
−1.2596E−05
4.2883E−07
−5.2409E−09



















TABLE 15









2ω (°)
75.0



Fno
1.43



f (mm)
5.007



f1 (mm)
5.403



f2 (mm)
−30.200



f3 (mm)
−31.750



f4 (mm)
34.336



f5 (mm)
−125.717



f6 (mm)
290.436



f7 (mm)
3.648



f8 (mm)
−2.884



TTL (mm)
6.296



LB (mm)
1.086



IH (mm)
3.928



TTL/IH
1.603










As shown in Table 19, Embodiment 5 satisfies the conditional formulas (1) to (7).


Axial aberration of the camera lens LA according to Embodiment 5 is shown in FIG. 19, magnification chromatism is shown in FIG. 20, and field curvature and distortion is shown in FIG. 21. As shown in Table 15, the camera lens LA according to Embodiment 5 has a wide angle, an ultra-thin appearance and a bright Fno, as shown in FIG. 19 to FIG. 21, which makes it not difficult to understand that it has an excellent optical characteristic.


Embodiment 6


FIG. 22 is a diagram showing a configuration of a camera lens LA according to Embodiment 6. Data in Table 16 includes: curvature radius R of object sides and image sides of a 1st lens L1 to an 8th lens L8 constituting the camera lens LA according to Embodiment 6, center thickness of a lens and on-axis distance d between lenses, refractive index nd, Abbe number vd and effective radius. Data in Table 17 includes: conic coefficient k and aspherical coefficient. Data in Table 18 includes: 2ω, f, f1, f2, f3, f4, f5, f6, f7, f8, TTL, IH and TTL/IH.















TABLE 16







R (mm)
d (mm)
nd
νd
Effective radius (mm)
























STOP


−0.366




1.815


R1
2.3359
d1
1.106
nd1
1.5831
ν1
59.39
1.815


R2
7.0937
d2
0.067




1.745


S1


0.020




1.720


R3
7.5568
d3
0.188
nd2
1.6613
ν2
20.37
1.657


R4
5.6002
d4
0.197




1.535


S2


−0.150




1.529


R5
5.5750
d5
0.175
nd3
1.6509
ν3
21.52
1.500


R6
4.3620
d6
0.382




1.467


R7
7.2454
d7
0.513
nd4
1.5439
ν4
55.95
1.470


R8
10.4657
d8
0.314




1.620


R9
4.5749
d9
0.313
nd5
1.6397
ν5
23.53
1.695


R10
3.7409
d10
0.131




1.955


R11
−13.2013
d11
0.334
nd6
1.5439
ν6
55.95
2.028


R12
−8.7257
d12
−0.400




2.242


S3


0.512




2.350


R13
5.0605
d13
0.876
nd7
1.5439
ν7
55.95
2.481


R14
−2.9146
d14
0.417




2.777


R15
−4.9041
d15
0.296
nd8
1.5352
ν8
56.12
3.213


R16
2.3266
d16
0.550




3.393


R17

d17
0.210
nd9
1.5168
ν9
64.17
3.751


R18

d18
0.292




3.802



















TABLE 17









Conic coefficient
Aspheric coefficient
















k
A4
A6
A8
A10
A12
A14
A16



















R1
−3.1759E−01
−1.7714E−04
4.5712E−03
−4.6702E−03
2.8094E−03
−9.7634E−04
1.8419E−04
−1.8887E−05


R2
5.4572E+00
−6.2759E−02
3.0983E−02
−3.0984E−03
−4.4224E−03
1.8809E−03
−2.7642E−04
1.0068E−05


R3
7.9826E+00
−8.6946E−02
5.4826E−02
−8.1725E−03
−7.6455E−03
4.2211E−03
−7.3445E−04
3.5579E−05


R4
−3.3184E+00
−1.3430E−03
−1.3356E−03
−6.1968E−04
−3.2452E−07
8.4740E−05
3.4684E−05
−1.6651E−06


R5
4.9098E−01
4.0353E−04
1.3610E−04
2.4023E−04
4.6979E−05
−3.4144E−05
−2.5656E−05
7.4978E−06


R6
6.5709E+00
−4.3233E−02
3.2619E−02
−1.9041E−03
−7.5367E−03
3.9222E−03
−4.5301E−04
−7.8123E−05


R7
−5.3802E+01
−2.2954E−02
−4.8978E−03
1.3077E−02
−2.3608E−02
1.9396E−02
−7.8037E−03
1.2456E−03


R8
−8.4561E+00
−5.2462E−02
1.6801E−02
−1.2272E−02
2.3237E−03
1.5849E−04
−1.5314E−04
1.5181E−05


R9
−2.7612E+01
−1.0700E−01
4.1737E−02
−1.8185E−02
5.9622E−03
−2.3151E−03
7.1050E−04
−1.0051E−04


R10
−2.4769E+01
−8.5294E−02
1.5507E−02
2.7278E−03
−3.7018E−03
1.3802E−03
−2.4871E−04
1.9242E−05


R11
−6.4111E+01
1.4451E−03
−9.3484E−04
−4.9973E−04
−1.1827E−04
−3.8044E−06
7.1407E−07
7.9078E−07


R12
1.1430E+01
−3.7776E−03
−5.3166E−04
−6.4149E−05
−1.2583E−05
3.6645E−06
1.7854E−07
1.9476E−07


R13
−1.5726E+01
−1.1901E−03
−1.3815E−02
5.5513E−03
−2.0389E−03
4.5796E−04
−5.4078E−05
2.7391E−06


R14
−1.7824E+01
1.1296E−02
2.3607E−03
−2.9758E−03
7.0022E−04
−8.0417E−05
4.4485E−06
−8.6091E−08


R15
−5.4955E−01
−5.6431E−02
1.9897E−02
−3.5420E−03
4.0706E−04
−2.8645E−05
1.1176E−06
−1.8677E−08


R16
−1.3108E+01
−3.5820E−02
9.4230E−03
−1.7840E−03
1.9782E−04
−1.2569E−05
4.2846E−07
−5.4982E−09



















TABLE 18









2ω (°)
75.4



Fno
1.35



f (mm)
4.921



f1 (mm)
5.502



f2 (mm)
−34.036



f3 (mm)
−32.681



f4 (mm)
40.991



f5 (mm)
−37.608



f6 (mm)
46.110



f7 (mm)
3.537



f8 (mm)
−2.910



TTL (mm)
6.343



LB (mm)
1.052



IH (mm)
3.928



TTL/IH
1.615










As shown in Table 19, Embodiment 6 satisfies the conditional formulas (1) to (7).


Axial aberration of the camera lens LA according to Embodiment 6 is shown in FIG. 23, magnification chromatism is shown in FIG. 24, and field curvature and distortion is shown in FIG. 25. As shown in Table 18, the camera lens LA according to Embodiment 6 has a wide angle, an ultra-thin appearance and a bright Fno, as shown in FIG. 23 to FIG. 25, which makes it not difficult to understand that it has an excellent optical characteristic.


Table 19 presented later on shows values corresponding to parameters specified in conditional formulas (1) to (7) according to Embodiment 1 to Embodiment 6.

















TABLE 19







Embodiment 1
Embodiment 2
Embodiment 3
Embodiment 4
Embodiment 5
Embodiment 6























ν1 − ν2
39.01
39.01
39.01
39.01
39.01
39.01
Conditional formula (1)


ν1 − ν3
37.86
37.86
37.86
37.86
37.86
37.86
Conditional formula (2)


f1/f
1.057
1.075
1.061
1.060
1.079
1.118
Conditional formula (3)


f2/f
−6.677
−6.737
−6.583
−6.731
−6.032
−6.916
Conditional formula (4)


f3/f
−6.264
−6.294
−6.224
−6.338
−6.342
−6.641
Conditional formula (5)


f7/f
0.701
0.643
0.698
0.693
0.729
0.719
Conditional formula (6)


f8/f
−0.567
−0.568
−0.563
−0.569
−0.576
−0.591
Conditional formula (7)









The scope of the present disclosure is not limited to the above-described embodiments, and any ordinarily skilled in the art, within the content disclosed by the present disclosure, may make equivalent modifications or variations, which should be covered within the protection scope of the claims.

Claims
  • 1. A camera lens, configured with, sequentially from an object side: a 1st lens having a positive refractive power, a 2nd lens having a negative refractive power, a 3rd lens having a negative refractive power, a 4th lens having a positive refractive power, a 5th lens having a negative refractive power, a 6th lens having a positive refractive power, a 7th lens having a positive refractive power and an 8th lens having a negative refractive power, and satisfying conditional formulas (1) to (2) below: 35.00≤v1−v2≤50.00   (1);35.00≤v1−v3≤50.00   (2);where,v1: Abbe number of the 1st lens L1;v2: Abbe number of the 2nd lens L2;v3: Abbe number of the 3rd lens L3.
  • 2. The camera lens according to claim 1, satisfying a conditional formula (3) below: 1.00≤f1/f≤1.50   (3);where,f: a focal length of an overall camera lens;f1: a focal length of the 1st lens.
  • 3. The camera lens according to claim 1, satisfying a conditional formula (4) below: −8.00≤f2/f≤−5.00   (4);where,f: the focal length of the overall camera lens;f2: a focal length of the 2nd lens.
  • 4. The camera lens according to claim 1, satisfying a conditional formula (5) below: −8.00≤f3/f≤−5.00   (5);where,f: the focal length of the overall camera lens;f3: a focal length of the 3rd lens.
  • 5. The camera lens according to claim 1, satisfying a conditional formula (6) below: 0.30≤f7/f≤1.50   (6);where,f: the focal length of the overall camera lens;f7: a focal length of the 7th lens.
  • 6. The camera lens according to claim 1, satisfying a conditional formula (7) below: −1.00≤f8/f≤−0.30   (7);where,f: the focal length of the overall camera lens;f8: a focal length of the 8th lens.
Priority Claims (1)
Number Date Country Kind
2018-137212 Jul 2018 JP national