CN208689246U

CN208689246U - Super large aperture wide-angle lens

Info

Publication number: CN208689246U
Application number: CN201821112730.0U
Authority: CN
Inventors: 张云涛; 盛亚茗; 尚洁阳
Original assignee: Jiaxing Zhongrun Optical Technology Co Ltd
Current assignee: Jiaxing Zhongrun Optical Technology Co Ltd
Priority date: 2018-07-13
Filing date: 2018-07-13
Publication date: 2019-04-02
Anticipated expiration: 2028-07-13

Abstract

A kind of super large aperture wide-angle lens successively includes: front lens group, diaphragm, the rear lens group with positive light coke, protection glass and imaging surface with negative power from the object side to image side；The front lens group includes: at least three pieces lens and one piece of lens with positive light coke with negative power；The rear lens group includes: at least two pieces lens with positive light coke, and wherein at least having one piece is balsaming lens.The utility model provides a kind of aperture less than 1.2,1/1.8 target surface of adaptation, the pick-up lens that infrared confocal, use environment temperature range is -40 DEG C~80 DEG C, has smaller volume and weight in generic camera lens.

Description

Super large aperture wide-angle lens

Technical field

The utility model relates to a kind of technology in optical device field, wide-angle of specifically a kind of aperture less than 1.2 Camera lens.

Background technique

With the development of pick-up lens industry, for camera lens it is extremely low according to environment under image quality require it is higher and higher, It is bright not only to need picture, and wants clarity with higher.Shooting of the camera lens that the prior art uses under very dark environment Picture is partially dark, noise is big, identification is low, is unable to satisfy the demand in market；To meet the blur-free imaging under very dark environment, need Camera lens have very big aperture and higher pixel, therefore cause lens wearer increase and eyeglass bore increase, camera lens volume and Cost is consequently increased.

Utility model content

The utility model In view of the above shortcomings of the prior art, proposes a kind of super large aperture wide-angle lens, has small Type, big target surface, high image quality, without thermalization and infrared confocal feature.

The utility model is achieved through the following technical solutions:

The utility model successively includes: front lens group with negative power, diaphragm, has positive light focus from the object side to image side Rear lens group, protection glass and the imaging surface of degree.

The front lens group includes: that at least three pieces lens with negative power and one piece are saturating with positive light coke Mirror.

The rear lens group includes: at least two pieces lens with positive light coke, and it is glued saturating for wherein at least having one piece Mirror.

First with negative power to the third lens refractive index be respectively (1.8,1.9), (1.7,1.8), (1.6,1.7), the ratio of the focal length of the focal length and camera lens entirety of three pieces of lens is (- 4.7, -5.8), (- 3.1, -4.3), (- 4,5.2), can guarantee to reduce volume and color difference while big visual angle.

The focal lengths of 4th lens and the ratio of camera lens whole focal length are (3.3,4.6), the after the diaphragm The focal length of one piece of eyeglass and the ratio of camera lens whole focal length are (4.8,6.8), to correct the spherical aberration coma under big field angle.

The focal length of the front lens group and the ratio of camera lens whole focal length are (- 2.3, -4.3)；The rear lens group Focal length and camera lens whole focal length ratio be (1.5,3.3), to guarantee big field angle.

The focal length of last piece of eyeglass of the camera lens and the ratio of camera lens whole focal length are (3.2,5.2), with correction The curvature of field astigmatism of each visual field.

The ratio of the effective focal length of the entire length and camera lens of the camera lens is the entirety of (10,12.5) to limit camera lens Length.

The image planes height of the camera lens and the ratio of camera lens effective focal length are (2.1,3) to limit angle lens range.

Technical effect

Compared with prior art, the utility model provide a kind of aperture less than 1.2,1/1.8 target surface of adaptation, it is infrared it is confocal, The pick-up lens that use environment temperature range is -40 DEG C~80 DEG C has smaller volume and weight in generic camera lens.

Detailed description of the invention

Fig. 1 is the semi-cutaway of embodiment 1；

Fig. 2 is each aberration diagram of embodiment 1；

Fig. 3 is the light chromaticity difference diagram of embodiment 1；

Fig. 4 is the semi-cutaway of embodiment 2；

Fig. 5 is each aberration diagram of embodiment 2；

Fig. 6 is the light chromaticity difference diagram of embodiment 2；

Fig. 7 is the semi-cutaway of embodiment 3；

Fig. 8 is each aberration diagram of embodiment 3；

Fig. 9 is the light chromaticity difference diagram of embodiment 3；

In figure: front lens group G1, diaphragm STP, rear lens group G2, protection glass CG, imaging surface IMG, first to the 8th are thoroughly Mirror L1~L8, the first front lens L61, the first rear lens L62, the second front lens L51, the second rear lens L52, third front lens L63, third rear lens L64, the 4th front lens L71, the 4th rear lens L72.

Specific embodiment

As shown in Figure 1, the present embodiment successively includes: front lens group G1, diaphragm with negative power from the object side to image side STP, the rear lens group G2 with positive light coke, protection glass CG and imaging surface IMG.

The front lens group G1 successively include: with negative power first to the third lens L1~L3 and have positive light 4th lens L4 of focal power.

The rear lens group G2 successively includes: the 5th lens L5 with positive light coke, the with positive light coke the 6th Lens L6 and the 7th lens L7 with positive light coke.

The 6th lens L6 is balsaming lens, comprising: one piece of first front lens L61 with negative power and one piece The first rear lens L62 with positive light coke.

The lens construction parameter of 1 the present embodiment of table

The ratio of the effective focal length of the entire length and camera lens of camera lens in the present embodiment is 11.3；The image planes height of camera lens Ratio with camera lens effective focal length is 2.65.

Wherein the second surface of the first front lens L61 of the 6th lens L6 is the first surface of the first rear lens L62.

As shown in Fig. 2, be the present embodiment axial chromatic aberration, the curvature of field and distortion, shown according on figure, the present embodiment it is red green The axial chromatic aberration of Lan Sanse has obtained good correction, can blur-free imaging；The axial chromatic aberration of infrared light has also obtained rectifying well Just, it realizes infrared confocal；Field curve shows that T line and S line have good convergence, and the curvature of field and astigmatism are very outstanding, protects It demonstrate,proves entire picture and uniform requirement is imaged；Distortion curve shows that camera lens has reached undistorted.

As shown in figure 3, being light chromaticity difference diagram, shown according on figure, the present embodiment to the ratio chromatism, of redgreenblue and Coma has carried out good amendment, meets high pixel request.

Embodiment 2

As shown in figure 4, the present embodiment is compared with Example 1, rear lens group G2 successively includes: the 5 with positive light coke Lens L5 and the 6th lens L6 with positive light coke.

The 5th lens L5 is balsaming lens, comprising: the second front lens L51 with negative power and with positive light Second rear lens L52 of focal power.

The 6th lens L6 is balsaming lens, comprising: third front lens L63 with positive light coke and with negative light The third rear lens L64 of focal power.

The lens construction parameter of 2 the present embodiment of table

The ratio of the effective focal length of the entire length and camera lens of camera lens in the present embodiment is 12.2；The image planes height of camera lens Ratio with camera lens effective focal length is 2.2.

Wherein the second surface of the second front lens L51 of the 5th lens L5 be the second rear lens L52 first surface, the 6th The second surface of the third front lens L63 of lens L6 is the first surface of third rear lens L64.

As shown in figure 5, be the present embodiment axial chromatic aberration, the curvature of field and distortion, shown according on figure, the present embodiment it is red green The axial chromatic aberration of Lan Sanse has obtained good correction, can blur-free imaging；The axial chromatic aberration of infrared light has also obtained rectifying well Just, it realizes infrared confocal；Field curve shows that T line and S line have good convergence, and the curvature of field and astigmatism are very outstanding, protects It demonstrate,proves entire picture and uniform requirement is imaged；Distortion curve shows that camera lens has reached undistorted.

As shown in fig. 6, being light chromaticity difference diagram, shown according on figure, the present embodiment to the ratio chromatism, of redgreenblue and Coma has carried out good amendment, meets high pixel request.

Embodiment 3

As shown in fig. 7, the present embodiment successively includes: front lens group G1, diaphragm with negative power from the object side to image side STP, the rear lens group G2 with positive light coke, protection glass CG and imaging surface IMG.

The front lens group G1 successively include: with negative power first to the third lens L1~L3, have positive light 4th lens L4 of focal power and the 5th lens L5 with negative power.

The rear lens group G2 successively includes: the 6th lens L6 with positive light coke, the with positive light coke the 7th Lens L7 and the 8th lens L8 with positive light coke.

The 7th lens L7 is balsaming lens, comprising: one piece of the 4th front lens L71 with negative power and one piece The 4th rear lens L72 with positive light coke.

The lens construction parameter of 3 the present embodiment of table

The ratio of the effective focal length of the entire length and camera lens of camera lens in the present embodiment is 10.8；The image planes height of camera lens Ratio with camera lens effective focal length is 2.7.

Wherein the second surface of the 4th front lens L71 of the 7th lens L7 is the first surface of the 4th rear lens L72.

As shown in figure 8, be the present embodiment axial chromatic aberration, the curvature of field and distortion, shown according on figure, the present embodiment it is red green The axial chromatic aberration of Lan Sanse has obtained good correction, can blur-free imaging；The axial chromatic aberration of infrared light has also obtained rectifying well Just, it realizes infrared confocal；Field curve shows that T line and S line have good convergence, and the curvature of field and astigmatism are very outstanding, protects It demonstrate,proves entire picture and uniform requirement is imaged；Distortion curve shows that camera lens has reached undistorted.

As shown in figure 9, being light chromaticity difference diagram, shown according on figure, the present embodiment to the ratio chromatism, of redgreenblue and Coma has carried out good amendment, meets high pixel request.

Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the utility model principle and objective with Different modes carries out local directed complete set to it, and the protection scope of the utility model is subject to claims and not by above-mentioned specific Implementation is limited, and each implementation within its scope is by the constraint of the utility model.

Claims

1. a kind of super large aperture wide-angle lens, which is characterized in that from the object side to image side successively include: the preceding mirror with negative power Piece group, diaphragm, the rear lens group with positive light coke, protection glass and imaging surface；The front lens group includes: at least three pieces Lens and one piece of lens with positive light coke with negative power；The rear lens group, which includes: at least two pieces, to be had just The lens of focal power, wherein at least having one piece is balsaming lens.

2. super large aperture wide-angle lens according to claim 1, characterized in that first with negative power to The refractive index of the third lens is respectively (1.8,1.9), (1.7,1.8), (1.6,1.7), and the focal length and camera lens of three pieces of lens are whole The ratio of the focal length of body is (- 4.7, -5.8), (- 3.1, -4.3), (- 4,5.2).

3. super large aperture wide-angle lens according to claim 1, characterized in that there is positive light in the front lens group The focal length of the lens of focal power and the ratio of camera lens whole focal length are (3.3,4.6), the coke of first piece of eyeglass after the diaphragm Away from being (4.8,6.8) with the ratio of camera lens whole focal length, to correct the spherical aberration coma under big field angle.

4. super large aperture wide-angle lens according to claim 1, characterized in that last piece of eyeglass of the camera lens Focal length and the ratio of camera lens whole focal length are (3.2,5.2), to correct the curvature of field astigmatism of each visual field.

5. super large aperture wide-angle lens according to claim 1, characterized in that the focal length and camera lens of the front lens group The ratio of whole focal length is (- 2.3, -4.3)；The ratio of the focal length of the focal length and camera lens of the rear lens group be (1.5, 3.3)。

6. super large aperture wide-angle lens according to claim 1, characterized in that the entire length and camera lens of the camera lens Effective focal length ratio be the entire length of (10,12.5) to limit camera lens.

7. super large aperture wide-angle lens according to claim 1, characterized in that the image planes height and camera lens of the camera lens The ratio of effective focal length is (2.1,3) to limit angle lens range.