CN107577030A - Wide-angle lens - Google Patents
Wide-angle lens Download PDFInfo
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- CN107577030A CN107577030A CN201610520529.5A CN201610520529A CN107577030A CN 107577030 A CN107577030 A CN 107577030A CN 201610520529 A CN201610520529 A CN 201610520529A CN 107577030 A CN107577030 A CN 107577030A
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Abstract
A kind of wide-angle lens sequentially includes the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens along optical axis from thing side to image side.First lens are that meniscus lens have a negative refractive power, the first lens convex surface facing thing side concave surface towards image side.Second lens are that meniscus lens have a negative refractive power, the second lens convex surface facing thing side concave surface towards image side.3rd lens, the 6th lens are that biconvex lens has positive refractive power.4th lens have positive refractive power.5th lens are that biconcave lens has negative refractive power.Wide-angle lens meets following condition：2≤θm/ TTL≤2.5, wherein, θmFor the maximum half angle of view of wide-angle lens, the unit of this maximum half angle of view is degree, TTL be the first lens thing side to imaging surface in the spacing on optical axis, the unit of this spacing is mm.
Description
Technical field
The present invention is related to a kind of wide-angle lens.
Background technology
The development trend of wide-angle lens now, in addition to constantly developing towards miniaturization with wide viewing angleization, with difference
Application demand, also need to be provided simultaneously with the ability of large aperture and environment resistant temperature change, it is known that wide-angle lens can not expire
Foot demand now, it is necessary to there is the wide-angle lens of another new architecture, could meet simultaneously miniaturization, wide viewing angle, large aperture and
The demand of environment resistant temperature change.
The content of the invention
The technical problem to be solved in the present invention is, large aperture can not be provided simultaneously with for wide-angle lens of the prior art
The defects of with the ability of environment resistant temperature change, there is provided a kind of wide-angle lens, its camera lens total length is short and small, visual angle is larger, aperture
It is worth smaller, environment resistant temperature change, but still there is good optical property.
The present invention is solves its technical problem the technical scheme adopted is that providing a kind of wide-angle lens along optical axis from thing
Side to image side sequentially includes the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens.First is saturating
Mirror is that meniscus lens have a negative refractive power, the first lens convex surface facing thing side concave surface towards image side.Second lens are crescent
Type lens have a negative refractive power, the second lens convex surface facing thing side concave surface towards image side.3rd lens have for biconvex lens
Positive refractive power.4th lens have positive refractive power.5th lens are that biconcave lens has negative refractive power.6th lens are lenticular
Mirror has positive refractive power.Wide-angle lens meets following condition：2≤θm/ TTL≤2.5, wherein, θmRegarded for maximum half of wide-angle lens
Angle, the unit of this maximum half angle of view are degree, TTL be the first lens thing side to imaging surface in the spacing on optical axis, this spacing
Unit be mm.
Wherein wide-angle lens meets following condition：Vd4-Vd2>30；Wherein, Vd4For the Abbe number of the 4th lens, Vd2For
The Abbe number of second lens.
Wherein wide-angle lens meets following condition：Vd6-Vd5>30；Wherein, Vd6For the Abbe number of the 6th lens, Vd5For
The Abbe number of 5th lens.
Wherein the first lens meet following condition：f1/f<0；Wherein, f1For the effective focal length of the first lens, f is wide-angle lens
The effective focal length of head.
Wherein the first lens and the 5th lens meet following condition：2<f1/f5<4.5；Wherein, f1For the effective of the first lens
Focal length, f5For the effective focal length of the 5th lens.
Wherein the 5th lens and the 6th lens meet following condition：0<|f5/f6|<1；Wherein, f5For the effective of the 5th lens
Focal length, f6For the effective focal length of the 6th lens.
Wherein the second lens and the 4th lens meet following condition：|f2/f4|>0.9；Wherein, f2For the effective of the second lens
Focal length, f4For the effective focal length of the 4th lens.
The wide-angle lens of the present invention can further include aperture, be arranged between the 3rd lens and the 4th lens.
Wherein wide-angle lens meets following condition：0.9≤FSL/BSL≤1.1；Wherein, FSL is aperture to the first lens
Thing side is in the spacing on optical axis, and BSL is for aperture to imaging surface in the spacing on optical axis.
Wherein the second lens, the 4th lens, the 5th lens and the 6th lens are made up of plastic material, and the second lens,
4th lens, the 5th lens and the 6th lens for non-spherical surface or two faces are all simultaneously at least non-spherical surface.
Wherein the 4th lens are biconvex lens or concave-convex lens, the 4th lens convex surface facing the image side.
Implement the wide-angle lens of the present invention, have the advantages that：Its camera lens total length is short and small, visual angle is larger, aperture
It is worth smaller, environment resistant temperature change, but still there is good optical property.
Brief description of the drawings
To enable above-mentioned purpose, feature and the advantage of the present invention to become apparent, preferred embodiment cited below particularly simultaneously coordinates
Accompanying drawing elaborates.
Fig. 1 is the lens configuration schematic diagram according to the first embodiment of the wide-angle lens of the present invention.
Fig. 2A is the longitudinal aberration diagram of Fig. 1 wide-angle lens.
Fig. 2 B are the curvature of field figures of Fig. 1 wide-angle lens.
Fig. 2 C are the distortion figures of Fig. 1 wide-angle lens.
Fig. 3 is the lens configuration schematic diagram according to the second embodiment of the wide-angle lens of the present invention.
Fig. 4 A are the longitudinal aberration diagrams of Fig. 3 wide-angle lens.
Fig. 4 B are the curvature of field figures of Fig. 3 wide-angle lens.
Fig. 4 C are the distortion figures of Fig. 3 wide-angle lens.
Fig. 5 is the lens configuration schematic diagram according to the 3rd embodiment of the wide-angle lens of the present invention.
Fig. 6 A are the longitudinal aberration diagrams of Fig. 5 wide-angle lens.
Fig. 6 B are the curvature of field figures of Fig. 5 wide-angle lens.
Fig. 6 C are the distortion figures of Fig. 5 wide-angle lens.
Fig. 7 is the lens configuration schematic diagram according to the fourth embodiment of the wide-angle lens of the present invention.
Fig. 8 A are the longitudinal aberration diagrams of Fig. 7 wide-angle lens.
Fig. 8 B are the curvature of field figures of Fig. 7 wide-angle lens.
Fig. 8 C are the distortion figures of Fig. 7 wide-angle lens.
Embodiment
Referring to Fig. 1, Fig. 1 is the lens configuration schematic diagram according to the first embodiment of the wide-angle lens of the present invention.Wide-angle
Camera lens 1 sequentially includes the first lens L11, the second lens L12, the 3rd lens L13, aperture along optical axis OA1 from thing side to image side
ST1, the 4th lens L14, the 5th lens L15, the 6th lens L16 and optical filter OF1.During imaging, the light from thing side is last
Image on imaging surface IMA1.
First lens L11 by meniscus lens there is negative refractive power to be made up of glass material, and its thing side S11 is convex surface,
Image side surface S12 is concave surface, and thing side S11 and image side surface S12 is all spherical face.
Second lens L12 by meniscus lens there is negative refractive power to be made up of plastic material, and its thing side S13 is convex surface,
Image side surface S14 is concave surface, and thing side S13 and image side surface S14 is all non-spherical surface.
3rd lens L13 by biconvex lens there is positive refractive power to be made up of glass material, and its thing side S15 is convex surface, as
Side S16 is convex surface, and thing side S15 and image side surface S16 is all spherical face.
4th lens L14 by biconvex lens there is positive refractive power to be made up of plastic material, and its thing side S18 is convex surface, as
Side S19 is convex surface, and thing side S18 and image side surface S19 is all non-spherical surface.
5th lens L15 by biconcave lens there is negative refractive power to be made up of plastic material, and its thing side S110 is concave surface, as
Side S111 is concave surface, and thing side S110 and image side surface S111 is all non-spherical surface.
6th lens L16 by biconvex lens there is positive refractive power to be made up of plastic material, and its thing side S112 is convex surface, as
Side S113 is convex surface, and thing side S112 and image side surface S113 is all non-spherical surface.
Its thing side S114 of optical filter OF1 and image side surface S115 is all plane.
In addition, the wide-angle lens 1 in first embodiment meet under it is at least one in eight conditions：
2≤θ1m/TTL1≤2.5 (1)
Vd14-Vd12>30 (2)
Vd16-Vd15>30 (3)
f11/f1<0 (4)
2<f11/f15<4.5 (5)
0<|f15/f16|<1 (6)
|f12/f14|>0.9 (7)
0.9≤FSL1/BSL1≤1.1 (8)
Wherein, θ 1mFor the maximum half angle of view of wide-angle lens 1, the unit of this maximum half angle of view is degree, and TTL1 is the first lens
For L11 thing side S11 to imaging surface IMA1 in the spacing on optical axis OA1, the unit of this spacing is mm, Vd12For the second lens
L12 Abbe number, Vd14For the 4th lens L14 Abbe number, Vd15For the 5th lens L15 Abbe number, Vd16For
Six lens L16 Abbe number, f1 be wide-angle lens 1 effective focal length, f11For the first lens L11 effective focal length, f12For
Two lens L12 effective focal length, f14For the 4th lens L14 effective focal length, f15For the 5th lens L15 effective focal length, f16
For the 6th lens L16 effective focal length, FSL1 is aperture ST1 to the first lens L11 thing side S11 between on optical axis OA1
Away from BSL1 is aperture ST1 to imaging surface IMA1 in the spacing on optical axis OA1.
Using said lens, aperture and meet design of the condition (1) to condition (8) so that wide-angle lens 1 can effectively contract
Short camera lens total length, stop down value, effectively correct aberration, reduce influence of the temperature change to image quality.
Table one is the relevant parameter table of each lens of wide-angle lens 1 in Fig. 1, and the data of table one show, first embodiment it is wide
The effective focal length of angle mirror first 1 is equal to 2.698mm, f-number is equal to 2.008, camera lens total length and is equal to 21.4618mm.
Table one
Obtained by the non-spherical surface depression degree z of each lens is by following equation in table one：
Z=ch2/{1+[1-(k+1)c2h2]1/2}+Ah4+Bh6+Ch8+Dh10
Wherein：
c：Curvature；
h：Lens surface any point to optical axis vertical range；
k：Circular cone coefficient；
A~D：Asphericity coefficient.
Table two is the relevant parameter table of the non-spherical surface of each lens in table one, and wherein k is circular cone coefficient (Conic
Constant), A~D is asphericity coefficient.
Table two
The wide-angle lens 1 of first embodiment, its maximum half view angle theta 1m=50.389 degree, the first lens L11 thing side
S11 to imaging surface IMA1 is in spacing TTL1=21.4618mm, the second lens L12 Abbe number Vd1 on optical axis OA12=
22.4, the 4th lens L14 Abbe number Vd14=55.8, the 5th lens L15 Abbe number Vd15=21.5, the 6th lens
L16 Abbe number Vd16=55.8, the effective focal length f1=2.698mm of wide-angle lens 1, the first lens L11 effective focal length
f11=-11.798mm, the second lens L12 effective focal length f12=-8.06mm, the 4th lens L14 effective focal length f14=
5.40mm, the 5th lens L15 effective focal length f15=-3.56mm, the 6th lens L16 effective focal length f16=4.09mm, aperture
ST1 to the first lens L11 thing side S11 is in the spacing FSL1=10.886mm on optical axis OA1, aperture ST1 to imaging surface
IMA1 can obtain θ 1 in the spacing BSL1=10.576mm on optical axis OA1 by above-mentioned datam/ TTL1=2.35, Vd14-Vd12=
33.4、Vd16-Vd15=34.3, f11/ f1=-4.37, f11/f15=3.31, | f15/f16|=0.87, | f12/f14|=
1.49th, FSL1/BSL1=1.03, requirement of the above-mentioned condition (1) to condition (8) can all be met.
In addition, the optical property of the wide-angle lens 1 of first embodiment also can reach requirement, this can see C from Fig. 2A to Fig. 2
Go out.It is longitudinal aberration (Longitudinal Aberration) figure of the wide-angle lens 1 of first embodiment shown in Fig. 2A.Figure
It is the curvature of field (Field Curvature) figure of the wide-angle lens 1 of first embodiment shown in 2B.It is first real shown in Fig. 2 C
Apply distortion (Distortion) figure of the wide-angle lens 1 of example.
Can be seen that by Fig. 2A, the wide-angle lens 1 of first embodiment is 0.435 μm to wavelength, 0.490 μm, 0.550 μm,
0.610 μm, longitudinal aberration value caused by 0.650 μm of light between -0.03mm between 0.025mm.
Can be seen that by Fig. 2 B, the wide-angle lens 1 of first embodiment is 0.435 μm to wavelength, 0.490 μm, 0.550 μm,
0.610 μm, 0.650 μm of light, in meridian (Tangential) direction and the sagitta of arc (Sagittal) direction the curvature of field between-
0.03 ㎜ is between 0.05 ㎜.
It can be seen that by Fig. 2 C (5 lines in figure almost overlap, so that seeming an only line), first embodiment
Wide-angle lens 1 is 0.435 μm to wavelength, 0.490 μm, 0.550 μm, 0.610 μm, distorting caused by 0.650 μm of light is situated between
Between -11% to 2%.
The longitudinal aberration of the wide-angle lens 1 of obvious first embodiment, the curvature of field, distortion can be corrected effectively, so as to obtain
Preferable optical property.
Referring to Fig. 3, Fig. 3 is the lens configuration schematic diagram according to the second embodiment of the wide-angle lens of the present invention.Wide-angle
Camera lens 2 sequentially includes the first lens L21, the second lens L22, the 3rd lens L23, aperture along optical axis OA2 from thing side to image side
ST2, the 4th lens L24, the 5th lens L25, the 6th lens L26 and optical filter OF2.During imaging, the light from thing side is last
Image on imaging surface IMA2.
First lens L21 by meniscus lens there is negative refractive power to be made up of glass material, and its thing side S21 is convex surface,
Image side surface S22 is concave surface, and thing side S21 and image side surface S22 is all spherical face.
Second lens L22 by meniscus lens there is negative refractive power to be made up of plastic material, and its thing side S23 is convex surface,
Image side surface S24 is concave surface, and thing side S23 and image side surface S24 is all non-spherical surface.
3rd lens L23 by biconvex lens there is positive refractive power to be made up of glass material, and its thing side S25 is convex surface, as
Side S26 is convex surface, and thing side S25 and image side surface S26 is all spherical face.
4th lens L24 by biconvex lens there is positive refractive power to be made up of plastic material, and its thing side S28 is convex surface, as
Side S29 is convex surface, and thing side S28 and image side surface S29 is all non-spherical surface.
5th lens L25 by biconcave lens there is negative refractive power to be made up of plastic material, and its thing side S210 is concave surface, as
Side S211 is concave surface, and thing side S210 and image side surface S211 is all non-spherical surface.
6th lens L26 by biconvex lens there is positive refractive power to be made up of plastic material, and its thing side S212 is convex surface, as
Side S213 is convex surface, and thing side S212 and image side surface S213 is all non-spherical surface.
Its thing side S214 of optical filter OF2 and image side surface S215 is all plane.
In addition, the wide-angle lens 2 in second embodiment meet under it is at least one in eight conditions：
2≤θ2m/TTL2≤2.5 (9)
Vd24-Vd22>30 (10)
Vd26-Vd25>30 (11)
f21/f2<0 (12)
2<f21/f25<4.5 (13)
0<|f25/f26|<1 (14)
|f22/f24|>0.9 (15)
0.9≤FSL2/BSL2≤1.1 (16)
Wherein, θ 2mFor the maximum half angle of view of wide-angle lens 2, the unit of this maximum half angle of view is degree, and TTL2 is the first lens
For L21 thing side S21 to imaging surface IMA2 in the spacing on optical axis OA2, the unit of this spacing is mm, Vd22For the second lens
L22 Abbe number, Vd24For the 4th lens L24 Abbe number, Vd25For the 5th lens L25 Abbe number, Vd26For
Six lens L26 Abbe number, f2 be wide-angle lens 2 effective focal length, f21For the first lens L21 effective focal length, f22For
Two lens L22 effective focal length, f24For the 4th lens L24 effective focal length, f25For the 5th lens L25 effective focal length, f26
For the 6th lens L26 effective focal length, FSL2 is aperture ST2 to the first lens L21 thing side S21 between on optical axis OA2
Away from BSL2 is aperture ST2 to imaging surface IMA2 in the spacing on optical axis OA2.
Using said lens, aperture and meet design of the condition (9) to condition (16) so that wide-angle lens 2 can be effective
Shorten camera lens total length, stop down value, effectively correct aberration, reduce influence of the temperature change to image quality.
Table three is the relevant parameter table of each lens of wide-angle lens 2 in Fig. 3, and the data of table three show, second embodiment it is wide
The effective focal length of angle mirror first 2 is equal to 2.800mm, f-number is equal to 2.010, camera lens total length and is equal to 21.569mm.
Table three
Obtained by the non-spherical surface depression degree z of each lens is by following equation in table three：
Z=ch2/{1+[1-(k+1)c2h2]1/2}+Ah4+Bh6+Ch8+Dh10
Wherein：
c：Curvature；
h：Lens surface any point to optical axis vertical range；
k：Circular cone coefficient；
A~D：Asphericity coefficient.
Table four is the relevant parameter table of the non-spherical surface of each lens in table three, and wherein k is circular cone coefficient (Conic
Constant), A~D is asphericity coefficient.
Table four
The wide-angle lens 2 of second embodiment, its maximum half view angle theta 2m=50.892 degree, the first lens L21 thing side
S21 to imaging surface IMA2 is in spacing TTL2=21.569mm, the second lens L22 Abbe number Vd2 on optical axis OA22=
22.4, the 4th lens L24 Abbe number Vd24=55.8, the 5th lens L25 Abbe number Vd25=21.5, the 6th lens
L26 Abbe number Vd26=55.8, the effective focal length f2=2.800mm of wide-angle lens 2, the first lens L21 effective focal length
f21=-10.219mm, the second lens L22 effective focal length f22=-7.87mm, the 4th lens L24 effective focal length f24=
5.44mm, the 5th lens L25 effective focal length f25=-2.97mm, the 6th lens L26 effective focal length f26=3.88mm, aperture
ST2 to the first lens L21 thing side S21 is in the spacing FSL2=10.647mm on optical axis OA2, aperture ST2 to imaging surface
IMA2 can obtain θ 2 in the spacing BSL2=10.921mm on optical axis OA2 by above-mentioned datam/ TTL2=2.36, Vd24-Vd22=
33.4、Vd26-Vd25=34.3, f21/ f2=-3.65, f21/f25=3.44, | f25/f26|=0.77, | f22/f24|=
1.45th, FSL2/BSL2=0.97, requirement of the above-mentioned condition (9) to condition (16) can all be met.
In addition, the optical property of the wide-angle lens 2 of second embodiment also can reach requirement, this can be from Fig. 4 A to Fig. 4 C
Go out.It is longitudinal aberration (Longitudinal Aberration) figure of the wide-angle lens 2 of second embodiment shown in Fig. 4 A.Figure
It is the curvature of field (Field Curvature) figure of the wide-angle lens 2 of second embodiment shown in 4B.It is second real shown in Fig. 4 C
Apply distortion (Distortion) figure of the wide-angle lens 2 of example.
Can be seen that by Fig. 4 A, the wide-angle lens 2 of second embodiment is 0.455 μm to wavelength, 0.502 μm, 0.558 μm,
0.614 μm, longitudinal aberration value caused by 0.661 μm of light between -0.025mm between 0.02mm.
Can be seen that by Fig. 4 B, the wide-angle lens 2 of second embodiment is 0.455 μm to wavelength, 0.502 μm, 0.558 μm,
0.614 μm, 0.661 μm of light, in meridian (Tangential) direction and the sagitta of arc (Sagittal) direction the curvature of field between-
0.04 ㎜ is between 0.04 ㎜.
It can be seen that by Fig. 4 C (5 lines in figure almost overlap, so that seeming an only line), second embodiment
Wide-angle lens 2 is 0.455 μm to wavelength, 0.502 μm, 0.558 μm, 0.614 μm, distorting caused by 0.661 μm of light is situated between
Between -15% to 1%.
The longitudinal aberration of the wide-angle lens 2 of obvious second embodiment, the curvature of field, distortion can be corrected effectively, so as to obtain
Preferable optical property.
Referring to Fig. 5, Fig. 5 is the lens configuration schematic diagram according to the 3rd embodiment of the wide-angle lens of the present invention.Wide-angle
Camera lens 3 sequentially includes the first lens L31, the second lens L32, the 3rd lens L33, aperture along optical axis OA3 from thing side to image side
ST3, the 4th lens L34, the 5th lens L35, the 6th lens L36 and optical filter OF3.During imaging, the light from thing side is last
Image on imaging surface IMA3.
First lens L31 by meniscus lens there is negative refractive power to be made up of glass material, and its thing side S31 is convex surface,
Image side surface S32 is concave surface, and thing side S31 and image side surface S32 is all spherical face.
Second lens L32 by meniscus lens there is negative refractive power to be made up of plastic material, and its thing side S33 is convex surface,
Image side surface S34 is concave surface, and thing side S33 and image side surface S34 is all non-spherical surface.
3rd lens L33 by biconvex lens there is positive refractive power to be made up of glass material, and its thing side S35 is convex surface, as
Side S36 is convex surface, and thing side S35 and image side surface S36 is all spherical face.
4th lens L34 by biconvex lens there is positive refractive power to be made up of plastic material, and its thing side S38 is convex surface, as
Side S39 is convex surface, and thing side S38 and image side surface S39 is all non-spherical surface.
5th lens L35 by biconcave lens there is negative refractive power to be made up of plastic material, and its thing side S310 is concave surface, as
Side S311 is concave surface, and thing side S310 and image side surface S311 is all non-spherical surface.
6th lens L36 by biconvex lens there is positive refractive power to be made up of plastic material, and its thing side S312 is convex surface, as
Side S313 is convex surface, and thing side S312 and image side surface S313 is all non-spherical surface.
Its thing side S314 of optical filter OF3 and image side surface S315 is all plane.
In addition, the wide-angle lens 3 in 3rd embodiment meet under it is at least one in eight conditions：
2≤θ3m/TTL3≤2.5 (17)
Vd34-Vd32>30 (18)
Vd36-Vd35>30 (19)
f31/f3<0 (20)
2<f31/f35<4.5 (21)
0<|f35/f36|<1 (22)
|f32/f34|>0.9 (23)
0.9≤FSL3/BSL3≤1.1 (24)
Wherein, θ 3mFor the maximum half angle of view of wide-angle lens 3, the unit of this maximum half angle of view is degree, and TTL3 is the first lens
For L31 thing side S31 to imaging surface IMA3 in the spacing on optical axis OA3, the unit of this spacing is mm, Vd32For the second lens
L32 Abbe number, Vd34For the 4th lens L34 Abbe number, Vd35For the 5th lens L35 Abbe number, Vd36For
Six lens L36 Abbe number, f3 be wide-angle lens 3 effective focal length, f31For the first lens L31 effective focal length, f32For
Two lens L32 effective focal length, f34For the 4th lens L34 effective focal length, f35For the 5th lens L35 effective focal length, f36
For the 6th lens L36 effective focal length, FSL3 is aperture ST3 to the first lens L31 thing side S31 between on optical axis OA3
Away from BSL3 is aperture ST3 to imaging surface IMA3 in the spacing on optical axis OA3.
Using said lens, aperture and meet design of the condition (17) to condition (24) so that wide-angle lens 3 can be effective
Shorten camera lens total length, stop down value, effectively correct aberration, reduce influence of the temperature change to image quality.
Table five is the relevant parameter table of each lens of wide-angle lens 3 in Fig. 5, and the data of table five show, 3rd embodiment it is wide
The effective focal length of angle mirror first 3 is equal to 2.728mm, f-number is equal to 2.007, camera lens total length and is equal to 21.472mm.
Table five
Obtained by the non-spherical surface depression degree z of each lens is by following equation in table five：
Z=ch2/{1+[1-(k+1)c2h2]1/2}+Ah4+Bh6+Ch8+Dh10
Wherein：
c：Curvature；
h：Lens surface any point to optical axis vertical range；
k：Circular cone coefficient；
A~D：Asphericity coefficient.
Table six is the relevant parameter table of the non-spherical surface of each lens in table five, and wherein k is circular cone coefficient (Conic
Constant), A~D is asphericity coefficient.
Table six
The wide-angle lens 3 of 3rd embodiment, its maximum half view angle theta 3m=50.360 degree, the first lens L31 thing side
S31 to imaging surface IMA3 is in spacing TTL3=21.472mm, the second lens L32 Abbe number Vd3 on optical axis OA32=
22.4, the 4th lens L34 Abbe number Vd34=55.8, the 5th lens L35 Abbe number Vd35=21.5, the 6th lens
L36 Abbe number Vd36=55.8, the effective focal length f3=2.728mm of wide-angle lens 3, the first lens L31 effective focal length
f31=-10.48mm, the second lens L32 effective focal length f32=-8.70mm, the 4th lens L34 effective focal length f34=
4.66mm, the 5th lens L35 effective focal length f35=-4.36mm, the 6th lens L36 effective focal length f36=4.96mm, aperture
ST3 to the first lens L31 thing side S31 is in the spacing FSL3=10.565mm on optical axis OA3, aperture ST3 to imaging surface
IMA3 can obtain θ 3 in the spacing BSL3=10.906mm on optical axis OA3 by above-mentioned datam/ TTL3=2.35, Vd34-Vd32=
33.4、Vd36-Vd35=34.3, f31/ f3=-3.84, f31/f35=2.40, | f35/f36|=0.88, | f32/f34|=
1.87th, FSL3/BSL3=0.97, requirement of the above-mentioned condition (17) to condition (24) can all be met.
In addition, the optical property of the wide-angle lens 3 of 3rd embodiment also can reach requirement, this can be from Fig. 6 A to Fig. 6 C
Go out.It is longitudinal aberration (Longitudinal Aberration) figure of the wide-angle lens 3 of 3rd embodiment shown in Fig. 6 A.Figure
It is the curvature of field (Field Curvature) figure of the wide-angle lens 3 of 3rd embodiment shown in 6B.It is the 3rd real shown in Fig. 6 C
Apply distortion (Distortion) figure of the wide-angle lens 3 of example.
Can be seen that by Fig. 6 A, the wide-angle lens 3 of 3rd embodiment is 0.435 μm to wavelength, 0.490 μm, 0.550 μm,
0.610 μm, longitudinal aberration value caused by 0.650 μm of light between -0.015mm between 0.04mm.
Can be seen that by Fig. 6 B, the wide-angle lens 3 of 3rd embodiment is 0.435 μm to wavelength, 0.490 μm, 0.550 μm,
0.610 μm, 0.650 μm of light, in meridian (Tangential) direction and the sagitta of arc (Sagittal) direction the curvature of field between-
0.05 ㎜ is between 0.05 ㎜.
It can be seen that by Fig. 6 C (5 lines in figure almost overlap, so that seeming an only line), 3rd embodiment
Wide-angle lens 3 is 0.435 μm to wavelength, 0.490 μm, 0.550 μm, 0.610 μm, distorting caused by 0.650 μm of light is situated between
Between -12% to 1%.
The longitudinal aberration of the wide-angle lens 3 of obvious 3rd embodiment, the curvature of field, distortion can be corrected effectively, so as to obtain
Preferable optical property.
Referring to Fig. 7, Fig. 7 is the lens configuration schematic diagram according to the fourth embodiment of the wide-angle lens of the present invention.Wide-angle
Camera lens 4 sequentially includes the first lens L41, the second lens L42, the 3rd lens L43, aperture along optical axis OA4 from thing side to image side
ST4, the 4th lens L44, the 5th lens L45, the 6th lens L46 and optical filter OF4.During imaging, the light from thing side is last
Image on imaging surface IMA4.
First lens L41 by meniscus lens there is negative refractive power to be made up of glass material, and its thing side S41 is convex surface,
Image side surface S42 is concave surface, and thing side S41 and image side surface S42 is all spherical face.
Second lens L42 by meniscus lens there is negative refractive power to be made up of plastic material, and its thing side S43 is convex surface,
Image side surface S44 is concave surface, and thing side S43 and image side surface S44 is all non-spherical surface.
3rd lens L43 by biconvex lens there is positive refractive power to be made up of glass material, and its thing side S45 is convex surface, as
Side S46 is convex surface, and thing side S45 and image side surface S46 is all spherical face.
4th lens L44 by concave-convex lens there is positive refractive power to be made up of plastic material, and its thing side S48 is concave surface, as
Side S49 is convex surface, and thing side S48 and image side surface S49 is all non-spherical surface.
5th lens L45 by biconcave lens there is negative refractive power to be made up of plastic material, and its thing side S410 is concave surface, as
Side S411 is concave surface, and thing side S410 and image side surface S411 is all non-spherical surface.
6th lens L46 by biconvex lens there is positive refractive power to be made up of plastic material, and its thing side S412 is convex surface, as
Side S413 is convex surface, and thing side S412 and image side surface S413 is all non-spherical surface.
Its thing side S414 of optical filter OF4 and image side surface S415 is all plane.
In addition, the wide-angle lens 4 in fourth embodiment meet under it is at least one in eight conditions：
2≤θ4m/TTL4≤2.5 (25)
Vd44-Vd42>30 (26)
Vd46-Vd45>30 (27)
f41/f4<0 (28)
2<f41/f45<4.5 (29)
0<|f45/f46|<1 (30)
|f42/f44|>0.9 (31)
0.9≤FSL4/BSL4≤1.1 (32)
Wherein, θ 4mFor the maximum half angle of view of wide-angle lens 4, the unit of this maximum half angle of view is degree, and TTL4 is the first lens
For L41 thing side S41 to imaging surface IMA4 in the spacing on optical axis OA4, the unit of this spacing is mm, Vd42For the second lens
L42 Abbe number, Vd44For the 4th lens L44 Abbe number, Vd45For the 5th lens L45 Abbe number, Vd46For
Six lens L46 Abbe number, f4 be wide-angle lens 4 effective focal length, f41For the first lens L41 effective focal length, f42For
Two lens L42 effective focal length, f44For the 4th lens L44 effective focal length, f45For the 5th lens L45 effective focal length, f46
For the 6th lens L46 effective focal length, FSL4 is aperture ST4 to the first lens L41 thing side S41 between on optical axis OA4
Away from BSL4 is aperture ST4 to imaging surface IMA4 in the spacing on optical axis OA4.
Using said lens, aperture and meet design of the condition (25) to condition (32) so that wide-angle lens 4 can be effective
Shorten camera lens total length, stop down value, effectively correct aberration, reduce influence of the temperature change to image quality.
Table seven is the relevant parameter table of each lens of wide-angle lens 4 in Fig. 7, and the data of table seven show, fourth embodiment it is wide
The effective focal length of angle mirror first 4 is equal to 2.780mm, f-number is equal to 2.014, camera lens total length and is equal to 21.464mm.
Table seven
Obtained by the non-spherical surface depression degree z of each lens is by following equation in table seven：
Z=ch2/{1+[1-(k+1)c2h2]1/2}+Ah4+Bh6+Ch8+Dh10
Wherein：
c：Curvature；
h：Lens surface any point to optical axis vertical range；
k：Circular cone coefficient；
A~D：Asphericity coefficient.
Table eight is the relevant parameter table of the non-spherical surface of each lens in table seven, and wherein k is circular cone coefficient (Conic
Constant), A~D is asphericity coefficient.
Table eight
The wide-angle lens 4 of fourth embodiment, its maximum half view angle theta 4m=50.658 degree, the first lens L41 thing side
S41 to imaging surface IMA4 is in spacing TTL4=21.464mm, the second lens L42 Abbe number Vd4 on optical axis OA42=
22.4, the 4th lens L44 Abbe number Vd44=55.8, the 5th lens L45 Abbe number Vd45=21.5, the 6th lens
L46 Abbe number Vd46=55.8, the effective focal length f4=2.780mm of wide-angle lens 4, the first lens L41 effective focal length
f41=-10.605mm, the second lens L42 effective focal length f42=-7.35mm, the 4th lens L44 effective focal length f44=
7.58mm, the 5th lens L45 effective focal length f45=-3.37mm, the 6th lens L46 effective focal length f46=3.68mm, aperture
ST4 to the first lens L41 thing side S41 is in the spacing FSL4=10.745mm on optical axis OA4, aperture ST4 to imaging surface
IMA4 can obtain θ 4 in the spacing BSL4=10.719mm on optical axis OA4 by above-mentioned datam/ TTL4=2.36, Vd44-Vd42=
33.4、Vd46-Vd45=34.3, f41/ f4=-3.81, f41/f45=3.15, f45/f46|=0.92, | f42/f44|=0.97,
FSL4/BSL4=1.00, it can all meet requirement of the above-mentioned condition (25) to condition (32).
In addition, the optical property of the wide-angle lens 4 of fourth embodiment also can reach requirement, this can be from Fig. 8 A to Fig. 8 C
Go out.It is longitudinal aberration (Longitudinal Aberration) figure of the wide-angle lens 4 of fourth embodiment shown in Fig. 8 A.Figure
It is the curvature of field (Field Curvature) figure of the wide-angle lens 4 of fourth embodiment shown in 8B.It is the 4th real shown in Fig. 8 C
Apply distortion (Distortion) figure of the wide-angle lens 4 of example.
Can be seen that by Fig. 8 A, the wide-angle lens 4 of fourth embodiment is 0.455 μm to wavelength, 0.502 μm, 0.558 μm,
0.614 μm, longitudinal aberration value caused by 0.661 μm of light between -0.03mm between 0.025mm.
Can be seen that by Fig. 8 B, the wide-angle lens 4 of fourth embodiment is 0.455 μm to wavelength, 0.502 μm, 0.558 μm,
0.614 μm, 0.661 μm of light, in meridian (Tangential) direction and the sagitta of arc (Sagittal) direction the curvature of field between-
0.04 ㎜ is between 0.06 ㎜.
It can be seen that by Fig. 8 C (5 lines in figure almost overlap, so that seeming an only line), fourth embodiment
Wide-angle lens 4 is 0.455 μm to wavelength, 0.502 μm, 0.558 μm, 0.614 μm, distorting caused by 0.661 μm of light is situated between
Between -15% to 1%.
The longitudinal aberration of the wide-angle lens 4 of obvious fourth embodiment, the curvature of field, distortion can be corrected effectively, so as to obtain
Preferable optical property.
Claims (11)
1. a kind of wide-angle lens, it is characterised in that sequentially include along optical axis from thing side to image side：
First lens, first lens be meniscus lens there is negative refractive power, first lens it is recessed convex surface facing the thing side
Facing to the image side；
Second lens, second lens be meniscus lens there is negative refractive power, second lens it is recessed convex surface facing the thing side
Facing to the image side；
3rd lens, the 3rd lens are that biconvex lens has positive refractive power；
4th lens, the 4th lens have positive refractive power；
5th lens, the 5th lens are that biconcave lens has negative refractive power；And
6th lens, the 6th lens are that biconvex lens has positive refractive power；
Wherein the wide-angle lens meets following condition：
2≤θm/TTL≤2.5
Wherein, θmFor the maximum half angle of view of the wide-angle lens, the unit of the maximum half angle of view is degree, and TTL is the thing of first lens
To imaging surface in the spacing on the optical axis, the unit of the spacing is mm for side.
2. wide-angle lens as claimed in claim 1, it is characterised in that the wide-angle lens meets following condition：
Vd4-Vd2>30
Wherein, Vd4For the Abbe number of the 4th lens, Vd2For the Abbe number of second lens.
3. wide-angle lens as claimed in claim 1 or 2, it is characterised in that the wide-angle lens meets following condition：
Vd6-Vd5>30
Wherein, Vd6For the Abbe number of the 6th lens, Vd5For the Abbe number of the 5th lens.
4. wide-angle lens as claimed in claim 1, it is characterised in that first lens meet following condition：
f1/f<0
Wherein, f1For the effective focal length of first lens, f is the effective focal length of the wide-angle lens.
5. the wide-angle lens as described in claim 1 or 4, it is characterised in that first lens and the 5th lens meet with
Lower condition：
2<f1/f5<4.5
Wherein, f1For the effective focal length of first lens, f5For the effective focal length of the 5th lens.
6. the wide-angle lens as described in claim 1 or 4, it is characterised in that the 5th lens and the 6th lens meet with
Lower condition：
0<|f5/f6|<1
Wherein, f5For the effective focal length of the 5th lens, f6For the effective focal length of the 6th lens.
7. the wide-angle lens as described in claim 1 or 4, it is characterised in that second lens and the 4th lens meet with
Lower condition：
|f2/f4|>0.9
Wherein, f2For the effective focal length of second lens, f4For the effective focal length of the 4th lens.
8. wide-angle lens as claimed in claim 1, it is characterised in that further include aperture, be arranged at the 3rd lens with this
Between four lens.
9. wide-angle lens as claimed in claim 8, it is characterised in that the wide-angle lens meets following condition：
0.9≤FSL/BSL≤1.1
Wherein, FSL be the aperture to the thing side of first lens in the spacing on the optical axis, BSL is the aperture to the imaging
Face is in the spacing on the optical axis.
10. wide-angle lens as claimed in claim 1, it is characterised in that second lens, the 4th lens, the 5th lens
And the 6th lens be made up of plastic material, and second lens, the 4th lens, the 5th lens and the 6th are saturating
Mirror for non-spherical surface or two faces is all simultaneously at least non-spherical surface.
11. the wide-angle lens as described in claim 1 or 10, it is characterised in that the 4th lens are that biconvex lens or bumps are saturating
Mirror, the 4th lens convex surface facing the image side.
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