CN204595311U

CN204595311U - A kind of tiny lens group

Info

Publication number: CN204595311U
Application number: CN201520245188.6U
Authority: CN
Inventors: 陈立武
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-21
Filing date: 2015-04-21
Publication date: 2015-08-26
Anticipated expiration: 2025-04-21

Abstract

The utility model relates to a kind of tiny lens group, is made up of successively 5 groups of lenses, and often organize lens pitch equal, the first lens are concavees lens, and rear end face adopts inner concave; Second lens are convex lens; 3rd lens are meniscus lens, and concave surface is front, and the front end face of described concave-convex lens adopts inner concave, and rear end face adopts outer convex surface; The biconvex lens that 4th lens are composed by two simple lenses, the less convex surface of radian is front; 5th lens adopt sheet glass, as optical filter, be placed in lens group foremost or rearmost end, restriction imaging beam wavelength band; Between described 3rd lens and the 4th lens, be also provided with diaphragm, limit the beam size of each visual field.Lens set structure of the present utility model only uses 5 particular optic, and structure is simple, and cost is low, applied widely.

Description

A kind of tiny lens group

[technical field]

The utility model relates to optical devices technologies field, specifically a kind of tiny lens group.

[background technology]

Micro-lens is a kind of special lens being used as macroshot, is mainly used in taking very trickle object, as flowers and insect etc.In order to adjust the distance, extremely near object also can correctly be focused, micro-lens is usually designed to and can stretches longer, to make optical centre as far as possible away from photo-sensitive cell, simultaneously in the design of lens set, also must pay attention to the control of distortion closely and aberration etc.Jiao of most of micro-lens is long is all greater than standard lens, and generally has 6 lens structures, and optical design may be not as general telephoto lens, therefore also non-fully is applicable to general photography.

[summary of the invention]

The purpose of this utility model is the defect overcoming prior art existence, provides a kind of tiny lens group of new structure.

For achieving the above object, design a kind of tiny lens group, it is characterized in that, be made up of 5 groups of lenses successively, often organize lens pitch equal,

First lens are concavees lens, and rear end face adopts inner concave, obtain Large visual angle areas imaging;

Second lens are convex lens, and convex surface is front, and the front end face of described convex lens adopts outer convex surface; For correcting because first lens on light line bends the part aberration caused, arrange beam size and light beam direct of travel;

3rd lens are meniscus lens, and concave surface is front, and the front end face of described concave-convex lens adopts inner concave, and rear end face adopts outer convex surface; For correcting the aberration produced by Large visual angle angle, and be used for correcting various aberration that front two panels lens do not correct and shaping is carried out to light beam;

The biconvex lens that 4th lens are composed by two simple lenses, the less convex surface of radian is front; Be used for correcting residual aberration and system aberration;

5th lens adopt sheet glass, as optical filter, be placed in lens group foremost or rearmost end, restriction imaging beam wavelength band; For limiting the wavelength band of imaging beam, the areas imaging of this lens group is visible light wave range, adopts optical filter Main Function to be to select the optimal imaging wave band for target, so can obtain best imaging resolution.

Between described 3rd lens and the 4th lens, be also provided with aperture diaphragm, limit the beam size of each visual field.

At focal length: 2.2mm, visual field: ± 45 °, wave band: 480nm-600nm, bore: under 4.5mm condition, each eyeglass preferred parameter is as follows:

Surface 1 radius of the first lens is 121.4256mm, and surperficial 2 radiuses are 1.476918mm, lens thickness 0.8mm;

Surface 1 radius of the second lens is 3.685175mm, and surperficial 2 radiuses are 41.32266mm, lens thickness 1mm;

Surface 1 radius of the 3rd lens is-4.54746mm, and surperficial 2 radiuses are-2.532551mm, lens thickness 0.8mm;

Surface 1 radius of the 4th lens is 6.14735mm, and surperficial 2 radiuses are-1.286541mm, and surperficial 3 radiuses are-7.536715mm, lens thickness 2.5mm;

The lens thickness 0.5mm of the 5th lens.

Described tiny lens group areas imaging is at 2cm-∞.

The optimum areas imaging of described tiny lens group is at 4cm-5cm.

Lens set structure of the present utility model only uses 5 particular optic, and structure is simple, and cost is low, applied widely, this camera lens is operated within the scope of visible light wave range, is applicable to macroshot, can be used for medical image shooting, closely object view, small items check amplification imaging etc. in detail.

[accompanying drawing explanation]

Fig. 1 is the utility model tiny lens arrangement of mirrors chip architecture schematic diagram and light channel structure figure

Fig. 2 is optical transfer function schematic diagram

Fig. 3 is aberration curve schematic diagram

Fig. 4 is disc of confusion schematic diagram

Fig. 5 is distortion curvature of field schematic diagram

1 first lens, 2 second lens, 3 the 3rd lens, 4 diaphragms, 5 the 4th lens, 6 the 5th lens.

[embodiment]

Now by reference to the accompanying drawings and embodiment the technical solution of the utility model is further elaborated, believe it is clearly for a person skilled in the art.

As shown in Figure 1, tiny lens group, is made up of 5 groups of lenses successively, often organizes lens pitch equal,

4th lens glue together the biconvex lens of seamless spliced one-tenth by two simple lenses, and the less convex surface of radian is front; Be used for correcting residual aberration and system aberration;

Between described 3rd lens and the 4th lens, be also provided with diaphragm, limit the beam size of each visual field.Described tiny lens group areas imaging is at 2cm-∞, and the optimum areas imaging of tiny lens group is at 4cm-5cm.

At focal length: 2.2mm, visual field: ± 45 °, wave band: 480nm-600nm, bore: under 4.5mm condition, the preferred optics lens parameter of each eyeglass of tiny lens group is as shown in the table,

The effectiveness data of this cover tiny lens group, as shown in Figures 2 to 5.

Claims

1. a tiny lens group, is characterized in that, is made up of successively 5 groups of lenses, often organizes lens pitch equal,

Second lens are convex lens;

3rd lens are meniscus lens, and concave surface is front, and the front end face of described concave-convex lens adopts inner concave, and rear end face adopts outer convex surface;

The biconvex lens that 4th lens are composed by two simple lenses;

5th lens adopt sheet glass, as optical filter, be placed in lens group foremost or rearmost end, restriction imaging beam wavelength band;

Also aperture diaphragm is provided with between described 3rd lens and the 4th lens.

2. a kind of tiny lens group as claimed in claim 1, is characterized in that, at focal length: 2.2mm, visual field: ± 45 °, wave band:

480nm-600nm, bore: under 4.5mm condition, each eyeglass preferred parameter is as follows:

The lens thickness 0.5mm of the 5th lens.

3. a kind of tiny lens group as claimed in claim 1, is characterized in that, described tiny lens group areas imaging is at 2cm-∞.

4. a kind of tiny lens group as claimed in claim 1, is characterized in that, the optimum areas imaging of described tiny lens group is at 4cm-5cm.