CN208459672U

CN208459672U - A kind of ultra-wide angle looks around on-vehicle lens

Info

Publication number: CN208459672U
Application number: CN201821334496.6U
Authority: CN
Inventors: 高林; 刘强
Original assignee: Nanyang Hailin Optical Instrument Processing Co Ltd
Current assignee: Nanyang Hailin Optical Instrument Processing Co Ltd
Priority date: 2018-08-19
Filing date: 2018-08-19
Publication date: 2019-02-01
Anticipated expiration: 2028-08-19

Abstract

The utility model discloses a kind of ultra-wide angle to look around on-vehicle lens, including the first lens, the second lens, the third lens, diaphragm, the 4th lens, the 5th lens and the 6th lens being arranged successively on same optical axis from object space to image space, first lens are the lens of recessed hat-shaped after lordosis, second lens and the 4th lens are plano-concave shaped lenses, the third lens, the 5th lens and the 6th lens are biconvex lens, the camera lens effectively eliminates the various aberrations of light, ensure that light accurately focuses on a bit, the image quality of camera lens is high.

Description

A kind of ultra-wide angle looks around on-vehicle lens

Technical field

The utility model belongs to imaging optical system technical field, and in particular to a kind of ultra-wide angle looks around on-vehicle lens.

Background technique

Currently, with the application of the technologies such as the automatic parking of automobile industry, unmanned, camera in installed video system It is widely used application, this 2 years demands to full-view camera is looked around are also more and more therewith, especially visual field angle Range is spent from common angle to wide-angle, is answered consumer demand to look around full-view camera and is sent out to the target of higher specification Exhibition, and the vehicle-mounted camera of looking around of wide-angle, high definition also will be as the standard configuration of future automobile.But it is existing applied to installed video system Lens assembly in the camera module of system is but poor there is imaging effect and F-number is big, and evening brightness is dark and visual field is smaller, It is at high cost, be not suitable for the defects of producing in enormous quantities.Therefore, a kind of optical lens is expected to overcome above-mentioned defect.

Utility model content

The utility model aims to solve the shortcomings of the prior art, a kind of ultra-wide angle is provided and looks around vehicle-mounted mirror Head, the camera lens effectively eliminate the various aberrations of light, it is ensured that light accurately focuses on a bit, and the image quality of camera lens is high.

A kind of ultra-wide angle looks around on-vehicle lens, including be arranged successively on same optical axis from the first lens from object space to image space, Two lens, the third lens, diaphragm, the 4th lens, the 5th lens and the 6th lens, first lens are recessed hat-shaped after lordosis The lens of shape, second lens and the 4th lens are plano-concave shaped lenses, and the third lens, the 5th lens and the 6th are thoroughly Mirror is biconvex lens.

Further, first focal length of lens is f1, and second focal length of lens is that f2, f1 and f2 meet the following conditions: 1.6 ≤f1/f2≤1.7。

Further, the third lens focal length is f3, and the 4th focal length of lens is that f4, f3 and f4 meet the following conditions: -1.50≤ f3/f4≤-1.4。

Further, the 5th focal length of lens is f5, and the 6th focal length of lens is that f6, f5 and f6 meet the following conditions: 0.4≤ f3/f4≤0.55.It solves the problems, such as that the visual field of bugeye lens is compressed, high angle scattered light is effectively reduced in camera lens interarea Highly, camera lens entire length is reduced, structure tolerance sensibility is reduced.

Further, Nd1, Nd2, Nd3, Nd4, Nd5 and Nd6 respectively indicate the first lens, the second lens, the third lens, The d optical index of 4th lens, the 5th lens and the 6th lens, the Nd1, Nd2, Nd3, Nd4, Nd5 and Nd6 meet as follows Condition: 1.75≤Nd1≤1.85,1.5≤Nd2≤1.6,1.85≤Nd3≤1.95,1.80≤Nd4≤1.90,1.65≤Nd5 ≤ 1.75,1.75≤Nd6≤1.85.

Further, Vd1, Vd2, Vd3, Vd4, Vd5 and Vd6 respectively indicate the first lens, the second lens, the third lens, The d Abbe number of 4th lens, the 5th lens and the 6th lens, described Vd1, Vd2, Vd3, Vd4, Vd5 and Vd6 meet following item Part: 48≤Vd1≤52,63≤Vd2≤65,17≤Vd3≤20,15≤Vd4≤18,53≤Vd5≤55,42≤Vd6≤45.It is logical The abbe number for optimizing each lens is crossed, solves the problems, such as that camera lens axial chromatic aberration is excessive, effectively increases center resolution.

Further, the f-number that ultra-wide angle looks around on-vehicle lens is F/NO, and the F/NO meets following condition: 1.8≤ F/NO≤2.2。

Further, ultra-wide angle looks around on-vehicle lens field angle FOV >=220 degree.

Further, ultra-wide angle looks around length TTL, 0 < TTL≤13mm of on-vehicle lens.

Further, with the first lens, the second lens, the third lens, light being arranged successively on optical axis from object space to image space Door screen, the 4th lens, the 5th lens, the 6th lens, optical filter and sensitive film.

The collocation of each eyeglass of optical lens assembly can effectively control the length of camera lens, while by using 6 Unlike material eyeglass, which is arranged in pairs or groups, can effectively eliminate the various aberrations of light, it is ensured that light accurately focuses on a bit, it is ensured that mirror The imaging high-quality of head；The length of effective control camera lens is in 13mm, and field angle is at 230 degree, F-number F/NO 2.0, it is ensured that Large aperture, evening high brightness；And the difficulty of processing of glass lens can be reduced, reduce manufacturing cost, improve production efficiency.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the optical transfer function resolving curved line figure of the utility model；

Fig. 3 is the distortion figure of the utility model；

Fig. 4 is the place figure of the utility model.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and examples.

Embodiment one: as shown in Figure 1, a kind of ultra-wide angle looks around on-vehicle lens, including on optical axis from object space to image space according to The first lens 1, the second lens 2, the third lens 3, diaphragm, the 4th lens 4, the 5th lens 5 and the 6th lens 6 of secondary arrangement, institute The lens that the first lens are recessed hat-shaped after lordosis are stated, second lens and the 4th lens are plano-concave shaped lenses, institute Stating the third lens, the 5th lens and the 6th lens is biconvex lens.

Further, the third lens focal length is f3, and the 4th focal length of lens is that f4, f3 and f4 meet the following conditions: -1.50 ≤f3/f4≤-1.4。

Further, ultra-wide angle looks around the length TTL, TTL=13mm of on-vehicle lens.

Further, with the first lens, the second lens, the third lens, light being arranged successively on optical axis from object space to image space Door screen, the 4th lens, the 5th lens, the 6th lens, optical filter 7 and sensitive film 8.

Fig. 2 is lens optical transmission function schematic diagram of the invention, and wherein abscissa is demand pairs, and ordinate is modulation Value.Within 1.0 visual fields, demand pairs illustrate that the pixel of the camera lens reaches mega pixel in 180lp/mm, 40% or more modulation value.Figure 3 be lens distortion performance schematic diagram of the invention, it is seen that, wherein abscissa is visual field value, and ordinate is distortion value. Under 0.9FOV visual field, distortion is -95%.Fig. 3 is shot field curvature schematic diagram of the invention, and wherein abscissa is focal variation value, Ordinate is half field-of-view's value.In full filed, the curvature of field illustrates that imaging is preferable within ± 0.035.To sum up optical analysis figure institute Show, the field angle of the optical system reaches 230 degree, it can be seen that range it is wide, imaging reach mega pixel, resolution ratio is higher, It distorts moderate.

The collocation of each eyeglass of optical lens assembly can effectively control the length of camera lens, while by using 6 Different eyeglass collocation can effectively eliminate the various aberrations of light, it is ensured that light accurately focuses on a bit, it is ensured that camera lens High-quality is imaged；Lens of the invention all use glass system at all-glass, with glass compared with plastics such as combine at the schemes not The performance of pipe high temperature and low-temperature lens is unaffected.The length of effective control camera lens is in 13mm, and field angle is 230 degree, light Enclose number F/NO 2.0, it is ensured that large aperture, evening high brightness；And the difficulty of processing of glass lens can be reduced, reduce manufacture at This, improves production efficiency.

Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, this field Other modifications or equivalent replacement that those of ordinary skill makes the technical solution of the utility model, it is practical without departing from this The spirit and scope of new technique scheme should all cover in the scope of the claims of the utility model.

Claims

1. a kind of ultra-wide angle looks around on-vehicle lens, it is characterised in that: including be arranged successively on same optical axis from object space to image space One lens, the second lens, the third lens, diaphragm, the 4th lens, the 5th lens and the 6th lens, first lens are lordosis The lens of recessed hat-shaped afterwards, second lens and the 4th lens are plano-concave shaped lenses, and the third lens, the 5th are thoroughly Mirror and the 6th lens are biconvex lens.

2. ultra-wide angle as described in claim 1 looks around on-vehicle lens, it is characterised in that: first focal length of lens is f1, the Two focal lengths of lens are that f2, f1 and f2 meet the following conditions: 1.6≤f1/f2≤1.7.

3. ultra-wide angle as claimed in claim 2 looks around on-vehicle lens, it is characterised in that: the third lens focal length is f3, and the 4th thoroughly Mirror focal length is that f4, f3 and f4 meet the following conditions: -1.50≤f3/f4≤- 1.4.

4. ultra-wide angle as claimed in claim 3 looks around on-vehicle lens, it is characterised in that: the 5th focal length of lens is f5, and the 6th thoroughly Mirror focal length is that f6, f5 and f6 meet the following conditions: 0.4≤f3/f4≤0.55.

5. ultra-wide angle as claimed in claim 4 looks around on-vehicle lens, it is characterised in that: Nd1, Nd2, Nd3, Nd4, Nd5 and Nd6 Respectively indicate the d optical index of the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens, institute It states Nd1, Nd2, Nd3, Nd4, Nd5 and Nd6 1 and meets following condition: 1.75≤Nd1≤1.85,1.5≤Nd2≤1.6,1.85≤ Nd3≤1.95,1.80≤Nd4≤1.90,1.65≤Nd5≤1.75,1.75≤Nd6≤1.85.

6. ultra-wide angle as claimed in claim 5 looks around on-vehicle lens, it is characterised in that: Vd1, Vd2, Vd3, Vd4, Vd5 and Vd6 The d Abbe number of the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens is respectively indicated, it is described Vd1, Vd2, Vd3, Vd4, Vd5 and Vd6 meet following condition: 48≤Vd1≤52,63≤Vd2≤65,17≤Vd3≤20,15≤ Vd4≤18,53≤Vd5≤55,42≤Vd6≤45.

7. ultra-wide angle as claimed in claim 6 looks around on-vehicle lens, it is characterised in that: ultra-wide angle looks around the aperture of on-vehicle lens Value is F/NO, and the F/NO meets following condition: 1.8≤F/NO≤2.2.

8. ultra-wide angle as claimed in claim 7 looks around on-vehicle lens, it is characterised in that: ultra-wide angle looks around on-vehicle lens field angle FOV >=220 degree.

9. ultra-wide angle as claimed in claim 8 looks around on-vehicle lens, it is characterised in that: ultra-wide angle looks around the length of on-vehicle lens With TTL, TTL≤13.3mm.

10. ultra-wide angle as claimed in claim 9 looks around on-vehicle lens, it is characterised in that: on optical axis from object space to image space according to The first lens, the second lens, the third lens, diaphragm, the 4th lens, the 5th lens, the 6th lens, optical filter and the sense of secondary arrangement Mating plate.