CN206147163U

CN206147163U - Optical image -taking structure

Info

Publication number: CN206147163U
Application number: CN201620639816.3U
Authority: CN
Inventors: 陈建宏
Original assignee: Bao Sheng Phenix Optical Co Ltd
Current assignee: St. Tian Hongshuo (Suzhou) Optoelectronic Technology Co., Ltd.
Priority date: 2016-06-24
Filing date: 2016-06-24
Publication date: 2017-05-03
Anticipated expiration: 2026-06-24

Abstract

The utility model relates to an optical image -taking structure, it is including being arranged to for instance first lens, second lens, third lens, fourth lens and the 5th lens of side by the thing side along the optical axis and in order, wherein, first lens have positive optics multiplying power, second lens and have negative optics multiplying power, third lens and have positive optics multiplying power, the fourth lens have positive optics multiplying power and the 5th lens have an optics multiplying power, the utility model discloses an increase of optical path overall length is avoided to the optics multiplying power of allocating a plurality of lens, can improve current optical image -taking structure's design, makes optical image -taking structure can be develop towards the direction of frivolousization with continuouslying, provides one kind and passes through feathery design, can satisfy the consumer to the expectation of image quality, and can load in the optical image -taking structure of portable equipment.

Description

Optical image-taking structure

Technical field

This utility model is related to a kind of optical lens structure, and more particularly to one kind is through lightening design, and is used for portable The optical image-taking structure of equipment.

Background technology

Because progressing greatly for battery technology is increasingly mature with package technique, various accurate electronic components can be assembled closely In the inside of portable equipment, portable equipment is allowed to be able to towards lightening direction develop；And the record for being started recently with share Daily life experience agitation, allows consumer to wish to obtain or share more distinct image, therefore is loaded on portable equipment Optical image-taking structure imaging performance, it has also become consumer selects one of important evidence of product；

However, be imaged on the theoretical gap with reality to need to be made up by arranging multiple different types of lens；But It is that, with consumer for the expectation of the image quality of optical image-taking structure is day by day improved, optical image-taking structure is lightening to be sent out The reduction of the thickness of portable equipment is unable to catch up with exhibition, therefore the recent shell for often having optical image-taking structure protrusion portable equipment Design, the optical image-taking structure of protrusion is seen with the exception that outside the favor for less easily obtaining consumer, in order to avoid optics Image-taking structure is worn and torn or is produced collision with other articles, and causes image quality as expected or not cause precision Probability that the optical image-taking structure of design breaks down is raised, make the optical image-taking structure that manufacturer is protrusion increased it is many anti- The design with anticollision is scraped, the raising of the design and fabrication cost of portable equipment is caused；

From the foregoing, the design of optical image-taking structure how is improved, in image quality, physical dimension and production cost three Balance is obtained between person, has been one of important topic that optical correlation industry needs solution.

Utility model content

In order to improve the design of existing optical image-taking structure, optical image-taking structure is set constantly to send out towards lightening direction Exhibition.This utility model provides a kind of optical image-taking structure, and the arrangement of the optical power of its multiple lens can be shortened between lens The generation of spacing and suppression aberration, can meet consumer for image quality on the premise of avoiding excessively increasing eyeglass number Expectation, this utility model avoids the increase of optical path overall length through the optical power of the multiple lens of allotment, reaches optics The lightening purpose of image-taking structure.

This utility model solves the optical image-taking structure that technical problem is proposed, it includes：

Arranged by thing side in order along an optical axis to one first lens of image side, one second lens, one the 3rd lens, One the 4th lens and one the 5th lens；

First lens have positive optical power, one first thing side surface of convex and concave one first image side surface, The first image side surface is provided with a point of inflexion in the edge near first lens；

Second lens have negative optical power, one second thing side surface of convex and concave one second image side surface；

3rd lens have positive optical power, one the 3rd thing side surface of convex and one the 3rd image side surface of convex, 3rd thing side surface is provided with a point of inflexion in the edge near the 3rd lens；

4th lens have one the 4th image side surface of positive optical power, concave 1 the 4th thing side surface and convex；

And, the 5th lens have an optical power, one the 5th thing side surface and one the 5th image side surface, the 5th thing Side surface includes a thing side pocket, and the thing side pocket is located at the confluce of the 5th thing side surface and the optical axis, the 5th picture Side surface includes an image side recess and an image side point of inflexion, and the image side recess is located at the friendship on the 5th image side surface and the optical axis Can locate, the image side point of inflexion is between the image side recess and the edge of the 5th lens.

The optical image-taking structure, it has effective focal length F, and the first described lens have one first focal length of lens F1, the optical image-taking structure meets following condition：0.85<F/f1<1.2.

The optical image-taking structure, wherein the first described lens have a composite focal distance f12, institute with second lens State the 3rd lens, the 4th lens and the 5th lens and there is a composite focal distance f345, the optical image-taking structure meet with Lower condition：0.5<|F/f12|<0.7；0.2<|F/f345|<0.5.

The optical image-taking structure, wherein the first described lens have an image side radius of curvature R 12, second lens With thing side radius of curvature R21, the optical image-taking structure meets condition：0.85<|R12/R21|<1.2.

The optical image-taking structure, wherein the first described lens have first refractive index N1 and an abbe number V1, Second lens have one second refractive index N2 and an abbe number V2, and the optical image-taking structure meets condition：0.03<|N1- N2|<0.2；26<V1-V2<40.

The optical image-taking structure, wherein the second described lens are separated by one with the 3rd described lens at the optical axis Apart from T23, the 3rd lens spaced a distance T34 at the optical axis with the 4th described lens, the 4th lens with it is described 5th lens spaced a distance T45 at the optical axis, the first described thing side surface is separated by one with the 5th described image side surface Apart from T15, the optical image-taking structure meets condition：0.21<(T23+T34+T45)/T15<0.52.

Effect obtained by technological means of the present utility model is promoted：This utility model optical image-taking structure it is multiple The optical power allotment of lens, improves the design of existing optical image-taking structure, enables optical image-taking structure avoiding excessively increasing Plus eyeglass number with meet consumer it is desired for image quality under the premise of, constantly develop towards lightening direction.

Description of the drawings

The schematic diagram of the side-looking of Fig. 1 systems this utility model preferred embodiment.

The light path schematic diagram of Fig. 2 systems this utility model preferred embodiment.

The spherical aberration curve chart of Fig. 3 systems this utility model preferred embodiment.

The curve chart of the astigmatism of Fig. 4 systems this utility model preferred embodiment.

The curve chart of the optical distortion of Fig. 5 systems this utility model preferred embodiment.

Specific embodiment

Hereinafter coordinate accompanying drawing and preferred embodiment of the present utility model, it is predetermined real to reach that this utility model is expanded on further The technological means taken with new purpose.

Optical image-taking structure as shown in Figures 1 and 2 includes：One aperture A, one first lens 10, one second lens 20, 3rd lens 30, one the 4th lens 40, one the 5th lens 50, an a protective glass P and imaging surface I；Wherein, first lens 10 are leaned on Nearly aperture A, first lens 10, second lens 20, the 3rd lens 30, the 4th lens 40 and the edge of the 5th lens 50 An optical axis X and arranged to image side towards protective glass P by thing side in order.

As shown in Figures 1 and 2, located at the edge of first lens 10, first lens 10 have positive optics times to aperture A It is somebody's turn to do in close on rate, one first thing side surface 101 of convex and concave one first image side surface 102, the first image side surface 102 The edge of the first lens 10 is provided with a point of inflexion 103.

As shown in Figures 1 and 2, second lens 20 have negative optical power, one second thing side surface 201 of convex and recessed One second image side surface 202 of shape.

As shown in Figures 1 and 2, the 3rd lens 30 have positive optical power, one the 3rd thing side surface 301 of convex and convex One the 3rd image side surface 302 of shape, the 3rd thing side surface 301 is provided with a contrary flexure in the edge near the 3rd lens 30 Point 303.

As shown in Figures 1 and 2, the 4th lens 40 have positive optical power, concave 1 the 4th thing side surface 401 and convex One the 4th image side surface 402 of shape.

As shown in Figures 1 and 2, the 5th lens 50 have an optical power, one the 5th thing side surface 501 and one the 5th picture Side surface 502, the 5th thing side surface 501 includes a thing side pocket 5011, and the thing side pocket 5011 is located at the 5th thing side Surface 501 and the confluce of optical axis X, the 5th image side surface 502 includes an image side recess 5021 and an image side point of inflexion 5022, the image side recess 5021 is located at the confluce on the 5th image side surface 502 and optical axis X, and the image side point of inflexion 5022 is situated between Between the edge of the lens 50 of image side recess 5021 and the 5th.

As shown in Figures 1 and 2, protective glass P is located between the 5th lens 50 and imaging surface I and is using glass material Made by matter.

Additionally, optical image-taking structure of the present utility model has overall effective focal length F, first lens 10 have one First focal length of lens f1；In preferred embodiment of the present utility model, F/f1=0.9952, satisfaction 0.85<F/f1<1.2 bar Part, can allow this utility model to converge the degree of light, when light passes through first lens 10, can be obviously improved.

In preferred embodiment of the present utility model, first lens 10 have a composite focal distance with second lens 20 F12, the 3rd lens 30, the 4th lens 40 have a composite focal distance f345 with the 5th lens 50；Wherein, | F/f12 |= 0.6125, and | F/f345 |=0.2886, meet 0.5<|F/f12|<0.7 and 0.2<|F/f345|<0.5 condition, can make this Utility model averagely first lens 10 and second lens 20, the 3rd lens 30, the 4th lens 40 and the 5th lens The distribution of the optical power of 50 liang of lens groups, the generation for reducing aberration.

In preferred embodiment of the present utility model, first lens 10 have an image side radius of curvature R 12, and this is second saturating Mirror 20 has thing side radius of curvature R21；In preferred embodiment of the present utility model, | R12/R21 |=0.9509, satisfaction 0.85<|R12/R21|<1.2 condition, can averagely the distribution of first lens 10 and the optical power of second lens 20, subtract Few aberration.

In preferred embodiment of the present utility model, first lens 10 have first refractive index N1 and one first dispersion Coefficient V1, second lens 20 have one second refractive index N2 and one second abbe number V2；Wherein, | N1-N2 |=0.1014, And V1-V2=33.48 meets 0.03<|N1-N2|<0.2 and 26<V1-V2<40 condition, can correct optics of the present utility model The aberration of image-taking structure.

In preferred embodiment of the present utility model, second lens 20 are separated by with the 3rd lens 30 at optical axis X One apart from T23, the 3rd lens 30 and the 4th lens 40 spaced a distance T34 in the optical axis X at, the 4th lens 40 and this 5th lens 50 spaced a distance T45 at optical axis X, the above distance is all the opposed facing image side of adjacent two lens Surface is separated by a distance in optical axis X places with thing side surface, the first thing side surface 101 and the phase of the 5th image side surface 502 Every one apart from T15, (T23+T34+T45)/T15=0.3218 meets 0.21<(T23+T34+T45)/T15<0.52 condition, Can fifty-fifty distribute separated by a distance between optical power and each lens of optimization, reach reduction aberration and the lightening mesh of structure 's.

Fig. 3 systems are that the light with optical axis X at different distances enters spherical aberration curve chart of the present utility model, are such as schemed Shown in 3, focusing range of the present utility model fall with focus in the range of the ± 0.03mm, it can thus be appreciated that this utility model tool There is good spherical aberration to suppress performance；The picture of meridional ray and sagittal ray when Fig. 4 systems are 41 degree for angle of incidence of light degree Non-dramatic song line chart, as shown in figure 4, this utility model suppresses astigmatism in the range of ± 0.1mm, therefore can be preferably imaged Quality；When Fig. 5 is 41 degree for angle of incidence of light degree, light enters optical distortion curve chart of the present utility model, as shown in figure 5, This utility model controls optical distortion within ± 3%, can effectively suppress the situation of imaging distortion.

The above is only preferred embodiment of the present utility model, not does any pro forma to this utility model Limit, although this utility model is disclosed as above with preferred embodiment, but is not limited to this utility model, any ability The technical staff in domain, in the range of without departing from technical solutions of the utility model, should utilize in the technology of the disclosure above Appearance is made a little change or is modified to the Equivalent embodiments of equivalent variations, as long as without departing from technical solutions of the utility model Hold, above example is made any simple modification, equivalent variations and modification according to technical spirit of the present utility model, still Belong in the range of technical solutions of the utility model.

Claims

1. a kind of optical image-taking structure, it is characterised in that include：

Arranged by thing side in order along an optical axis to one first lens of image side, one second lens, one the 3rd lens, one Four lens and one the 5th lens；

First lens have positive optical power, one first thing side surface of convex and concave one first image side surface, and this One image side surface is provided with a point of inflexion in the edge near first lens；

3rd lens have positive optical power, one the 3rd thing side surface of convex and one the 3rd image side surface of convex, and this Three thing side surfaces are provided with a point of inflexion in the edge near the 3rd lens；

4th lens have one the 4th image side surface of positive optical power, concave 1 the 4th thing side surface and convex；And

5th lens have an optical power, one the 5th thing side surface and one the 5th image side surface, the 5th thing side surface bag A thing side pocket is included, the thing side pocket is located at the confluce of the 5th thing side surface and the optical axis, the 5th image side surface bag An image side recess and an image side point of inflexion are included, the image side recess is located at the confluce on the 5th image side surface and the optical axis, should The image side point of inflexion is between the image side recess and the edge of the 5th lens.

2. optical image-taking structure according to claim 1, it is characterised in that with effective focal length F, described first is saturating Mirror has one first focal length of lens f1, and the optical image-taking structure meets following condition：0.85<F/f1<1.2.

3. optical image-taking structure according to claim 2, it is characterised in that the first described lens and second lens With a composite focal distance f12, the 3rd lens, the 4th lens have a composite focal distance f345 with the 5th lens, The optical image-taking structure meets following condition：0.5<|F/f12|<0.7；0.2<|F/f345|<0.5.

4. optical image-taking structure according to claim 3, it is characterised in that the first described lens have an image side curvature Radius R12, second lens have thing side radius of curvature R21, and the optical image-taking structure meets condition：0.85<|R12/ R21|<1.2。

5. optical image-taking structure according to claim 4, it is characterised in that the first described lens have a first refractive Rate N1 and an abbe number V1, second lens have one second refractive index N2 and an abbe number V2, the optical image-taking knot Structure meets condition：0.03<|N1-N2|<0.2；26<V1-V2<40.

6. optical image-taking structure according to claim 5, it is characterised in that the second described lens are saturating with the described the 3rd Mirror spaced a distance T23 at the optical axis, the 3rd lens are spaced a distance at the optical axis with the 4th described lens T34, the 4th lens spaced a distance T45 at the optical axis with the 5th described lens, described the first thing side surface and institute The spaced a distance T15 in the 5th image side surface for stating, the optical image-taking structure meets condition：0.21<(T23+T34+T45)/T15< 0.52。