CN209327666U - 3mm high-resolution tight shot - Google Patents

Abstract

The utility model relates to a kind of 3mm high-resolution tight shots, the rear group of B that preceding group of A being negative including the focal power set gradually from the object side to the image side, diaphragm C, focal power are positive, preceding group of A includes bent moon the negative lens A1, double-concave negative lens A2 set gradually, biconvex positive lens A3, group B includes the gluing unit of the bent moon negative lens B1 set gradually and biconvex positive lens B2 composition afterwards, and biconvex positive lens B3, this lens construction is simple, design is reasonable, field angle is big, easy to process, high resolution.

Description

3mm high-resolution tight shot

Technical field

The utility model relates to a kind of 3mm high-resolution tight shots.

Background technique

Camera lens is the important component of vehicle-mounted vidicon, and on-vehicle lens market is in high speed development stage, city at present On-vehicle lens emerge one after another on field, but most of camera lenses due to field angle it is big, there are light passing amount is small, edge image quality is bad etc. is asked Topic, and since on-vehicle lens are more demanding to operating temperature range, many camera lenses can not be by the high and low temperature test, under image quality is serious Drop.

Summary of the invention

In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a kind of 3mm high-resolution Tight shot.

In order to solve the above-mentioned technical problem, the technical solution of the utility model is: a kind of 3mm high-resolution tight shot, The rear group of B that preceding group of A being negative including the focal power set gradually from the object side to the image side, diaphragm C, focal power are positive, preceding group of A packet Bent moon negative lens A1, double-concave negative lens A2, the biconvex positive lens A3 set gradually is included, the rear B that organizes includes that the bent moon set gradually is born The gluing unit of lens B1 and biconvex positive lens B2 composition, biconvex positive lens B3.

Further, the airspace between the preceding group A and rear group B is 1.2mm, and bent moon negative lens A1 is negative with concave-concave Airspace between lens A2 is 3.7mm, and the airspace between double-concave negative lens A2 and biconvex positive lens A3 is 0.5mm, Airspace between gluing unit and biconvex positive lens B3 is 0.1mm.

Further, plate optical filter is set between biconvex positive lens B3 and IMA image planes.

Compared with prior art, the utility model has the following beneficial effects: structure is simple, rationally, field angle is big for design, It is easy to process, high resolution.

The utility model is described in more detail with reference to the accompanying drawings and detailed description.

Detailed description of the invention

Fig. 1 is lens optical system schematic diagram；

Fig. 2 is the functional value of MTF under this camera lens visible light；

Fig. 3 is MTF functional value of this camera lens under the degree environment of low temperature -40；

Fig. 4 is MTF functional value of this camera lens under 105 degree of environment of high temperature；

Fig. 5 is the defocusing curve of this camera lens.

In figure:

A is organized before A-；A1- bent moon negative lens A1；A2- double-concave negative lens A2；A3- biconvex positive lens A3；B is organized after B-；B1- Bent moon negative lens B1；B2- biconvex positive lens B2；B3-, biconvex positive lens B3；C- diaphragm C；D- plate optical filter；E-IMA image planes.

Specific embodiment

In order to make the above-mentioned features and advantages of the utility model more obvious and understandable, special embodiment below, and cooperate attached drawing, It is described in detail below.

As shown in Figs. 1-5, a kind of 3mm high-resolution tight shot, including the focal power set gradually from the object side to the image side The rear group of B that preceding group of A being negative, diaphragm C, focal power are positive, preceding group of A include the bent moon negative lens A1 set gradually, and concave-concave is negative saturating Mirror A2, biconvex positive lens A3, it is rear to organize the gluing unit that B includes the bent moon negative lens B1 set gradually and biconvex positive lens B2 composition, Biconvex positive lens B3.

In the present embodiment, the airspace before described between group A and rear group B is 1.2mm, bent moon negative lens A1 and double Airspace between recessed negative lens A2 is 3.7mm, and the airspace between double-concave negative lens A2 and biconvex positive lens A3 is 0.5mm, the airspace between gluing unit and biconvex positive lens B3 are 0.1mm.

In the present embodiment, plate optical filter is set between biconvex positive lens B3 and IMA image planes.

In the present embodiment, this camera lens uses anti-long distance structure, and preceding group of focal power is negative, and rear focal power of organizing is positive, and reduces High angle scattered light increases illumination in the angle of incidence of light of eyeglass, improves big target surface imaging feasibility；By glass material selection and Each face curvature, air reduce tolerance sensitivities away from adjustment；By temperature-compensating between eyeglass, realize that optics without thermalization, makes camera lens It can be worked normally within the temperature range of -40 degree are to 105 degree, the stability requirement of on-vehicle lens can be met.

The specific performance parameter of this camera lens are as follows: focal length: EFFL=3mm；Number=2.0 F；Field angle: 2w >=142 °；Imaging circle is straight Diameter is greater than Ф 6.6；Service band: visible light；Distortion: < -20%；Optics overall length TTL≤22mm, optics rear cut-off distance >=6.5mm；It should Camera lens is suitable for 3,000,000 pixel high-resolution CCD or cmos camera.

In the present embodiment, each lens parameters are as follows:

This camera lens is designed using full glass, and image quality is stablized, high resolution, and integrated imaging ability is high；This lens edge illumination is high, It is high that picture brightness is imaged；The selection economical rationality of this camera lens, easy processing improve producing feasibility；This lens optical susceptibility is low, raw It is high to produce yield, it is suitable for mass production；Under wider operating temperature range, image quality is basically unchanged this camera lens, basic to realize zero temperature Drift.

The above is only the preferred embodiment of the present invention, it is all done according to present utility model application the scope of the patents it is equal Deng variation and modification, it should all belong to the covering scope of the utility model.

Claims (3)

1. a kind of 3mm high-resolution tight shot, it is characterised in that: the focal power including setting gradually from the object side to the image side is The rear group of B that negative preceding group of A, diaphragm C, focal power are positive, preceding group of A includes the bent moon negative lens A1 set gradually, double-concave negative lens A2, biconvex positive lens A3, the rear B that organizes includes the gluing unit that the bent moon negative lens B1 set gradually and biconvex positive lens B2 is formed, double Convex positive lens B3.

2. 3mm high-resolution tight shot according to claim 1, it is characterised in that: before described between group A and rear group B Airspace be 1.2mm, airspace between bent moon negative lens A1 and double-concave negative lens A2 is 3.7mm, double-concave negative lens Airspace between A2 and biconvex positive lens A3 is 0.5mm, and the airspace between gluing unit and biconvex positive lens B3 is 0.1mm。

3. 3mm high-resolution tight shot according to claim 1, it is characterised in that: biconvex positive lens B3 and IMA image planes Between be arranged plate optical filter.