CN206479706U - A kind of large aperture wide-angle compact imaging device - Google Patents
A kind of large aperture wide-angle compact imaging device Download PDFInfo
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- CN206479706U CN206479706U CN201621403620.0U CN201621403620U CN206479706U CN 206479706 U CN206479706 U CN 206479706U CN 201621403620 U CN201621403620 U CN 201621403620U CN 206479706 U CN206479706 U CN 206479706U
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Abstract
The utility model discloses a kind of large aperture wide-angle compact imaging device, it is sequentially provided with from object plane to image planes：First lens, the first lens are the non-spherical lens of positive focal length, and two faces of the first lens are convex surface；Second lens, the second lens are the non-spherical lens of negative focal length, and two faces of the second lens are concave surface；3rd lens, the 3rd lens be positive focal length non-spherical lens, the 3rd lens towards object plane one side be concave surface, the 3rd lens towards image planes one side be convex surface；4th lens, the 4th lens are the non-spherical lens of negative focal length；4th lens are in " M " shape；Optical filter；Sensitive film；4th lens are h towards the surface effective diameter of image planes, and surface tangent and the surface normal at effective diameter h places are in 90 °, and the outgoing chief ray d and surface normal c at effective diameter h places angle are e, satisfaction：0<e<0.5°.The utility model can be used for the real scene shooting environment for needing greater angle light requirement tightened up, the loading space required for saving.
Description
【Technical field】
The utility model is related to Optical devices, especially a kind of large aperture wide-angle compact imaging device.
【Background technology】
There are some drawbacks in the small optical system used at present, under the larger light source irradiation of light energy intensity or too
Sunlight irradiation under, it may appear that stronger ghost, in the case where shooting angle is larger, it may appear that by eyeglass internal reflection, spacer ring and
Veiling glare caused by the reflection of pressure ring surface, causes overall picture poor as qualitative change, or occurs unnecessary light or exception in picture
The image of shape.
This utility model is based on the shortcoming proposition that above-mentioned prior art is present.
【Utility model content】
The technical problems to be solved in the utility model is to provide a kind of large aperture wide-angle compact imaging device, can be used for needing
Greater angle light is wanted to require tightened up real scene shooting environment, the loading space required for saving.
In order to solve the above technical problems, the utility model employs following technical proposals：A kind of large aperture wide-angle it is small-sized into
As device, it is characterised in that：It is disposed with from object plane to image planes：
First lens, first lens are the non-spherical lens of positive focal length, and two faces of first lens are
Convex surface；
Second lens, second lens are the non-spherical lens of negative focal length, and two faces of second lens are
Concave surface；
3rd lens, the 3rd lens are the non-spherical lens of positive focal length, and the 3rd lens are towards the one of object plane
Face is concave surface, the 3rd lens towards image planes one side be convex surface；
4th lens, the 4th lens are the non-spherical lens of negative focal length；4th lens are in " M " shape；
Optical filter；
Sensitive film；
The 4th described lens are h towards the surface effective diameter of image planes, and the surface tangent at effective diameter h is in surface normal
90 °, the angle of the outgoing chief ray d and surface normal c at effective diameter h is e, is met：0<e<0.5°.
A kind of large aperture wide-angle compact imaging device as described above, it is characterised in that：Imaging device overall length TTL is rear burnt
Overall length is FFL, meets following condition：3.6mm<TTL<3.75mm,1.0 mm<FFL<1.2mm.
A kind of large aperture wide-angle compact imaging device as described above, it is characterised in that：The first of the first described lens
Face, the second face optics effective diameter size are φ1、φ2, external diameter cun method is φⅠ, described second the first face of lens, the optics in two faces
Effective diameter is φ3、φ4, external diameter cun method is φⅡ, the first face of described the 3rd lens, the second face optics effective diameter are φ5、
φ6, external diameter cun method is φⅢ, the first face of described the 4th lens, the second face optics effective diameter are φ7、φ8, external diameter cun method is
φⅣ, meet following condition:0.74mm<φ1<0.76mm, 0.83< φ1/φ2<0.85,0.95mm<φ3<1.05mm, 1.0<
φ3/φ4<1.05,1.0mm< φ5<1.1mm, 0.83<φ5/φ6<0.86,1.75mm<φ7<1.78mm, 0.85<φ7/φ8<
0.9,1.0<φⅡ/φⅠ<1.05,1.05<φⅣ/φⅢ<1.1。
A kind of large aperture wide-angle compact imaging device as described above, it is characterised in that：The focal length of first lens is
f1, the focal length of second lens is f2, the focal length of the 3rd lens is f3, the focal length of the 4th lens is f4, meet：-
2.5<f2/f1<0, -1.5<f4/f3<0；The abbe number of first lens is lens1, the abbe number of second lens is
lens2, the abbe number of the 3rd lens is lens3, the abbe number lens of the 4th lens4, meet following condition：
52<lens1<60,52<lens3<60；52<lens4<60； 30<lens1-lens2<40。
A kind of large aperture wide-angle compact imaging device as described above, it is characterised in that：First lens and second saturating
The spacing of mirror is A1, the spacing of second lens and the 3rd lens is A2, the spacing of the 3rd lens and the 4th lens is
A3, the spacing of the 4th lens and sensitive film is A4, then following condition is met：0.55<A1/A2<0.6,1.25<A2/A3<
1.32,4.5<A4/A3<5.0,0.45<(A1+A2+A3+A4)/TTL<0.5。
A kind of large aperture wide-angle compact imaging device as described above, it is characterised in that：The center of first lens is thick
Spend for T1, the center thickness of second lens is T2, the center thickness of the 3rd lens is T3, in the 4th lens
Heart thickness is T4, meet： 1.7<T1/T2<1.75,0.54<T2/T3<0.56,1.8<T3/T4<1.85,0.5<(T1+T2+T3+T4)
/TTL<0.55；Wherein T1+T2+T3+T4With A1+A2+A3+A4Meet： 1<(T1+T2+T3+T4)/(A1+A2+A3+A4)<1.1。
A kind of large aperture wide-angle compact imaging device as described above, it is characterised in that：The diagonal of the sensitive film is straight
Footpath is IMC, is met：0.76<TTL/IMC<0.8.
A kind of large aperture wide-angle compact imaging device as described above, it is characterised in that：The focal length of the imaging device is
F, meets：0.75<f/TTL<0.8.
A kind of large aperture wide-angle compact imaging device as described above, it is characterised in that：It is first lens, second saturating
Mirror, the 3rd lens and the 4th lens are plastic lens.
A kind of large aperture wide-angle compact imaging device as described above, it is characterised in that：It is first lens, second saturating
Mirror, the 3rd lens, the aspherical surface shape of the 4th lens meet equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, and y is its unit of radial coordinate and length of lens unit phase
Together, k is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola；When k-factor is equal to -1
When, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k systems
When number is equal to 0, the face shape curve of lens is circle, when k-factor is more than 0, and the face shape curve of lens is oblateness；α1To α8Point
The coefficient corresponding to each radial coordinate is not represented.
Compared with prior art, a kind of large aperture wide-angle compact imaging device of the present utility model, has reached following effect：
1st, imaging device of the present utility model realizes aperture less than F2.0, and ghost is small, substantially the height without obvious veiling glare
As matter shaped device, the 4th lens 4 towards the surface effective diameter of image planes be h, the outgoing chief ray d and surface method at effective diameter h places
Line c angle is e, is met： 0<e<0.5 °, eyeglass internal reflection can be effectively eliminated, imaging becomes apparent from.
2nd, the first face of the first lens, the second face optics effective diameter size are φ1、φ2, external diameter cun method is φⅠ, second is saturating
First face of mirror, the optics effective diameter in two faces are φ3、φ4, external diameter cun method is φⅡ, the first face of the 3rd lens, the second face optics
Effective diameter is φ5、φ6, external diameter cun method is φⅢ, the first face of the 4th lens, the second face optics effective diameter are φ7、φ8, external diameter
Very little method is φⅣ, meet following condition:0.74mm<φ1<0.76mm, 0.83<φ1/φ2<0.85,0.95mm<φ3<1.05mm,
1.0<φ3/φ4<1.05,1.0mm<φ5<1.1mm, 0.83<φ5/φ6<0.86,1.75mm<φ7<1.78mm, 0.85<φ7/
φ8<0.9,1.0< φⅡ/φⅠ<1.05,1.05<φⅣ/φⅢ<1.1, the 4th actually active footpath of lens thang-kng is small, partial invalidity footpath
Substituted with effective diameter, the less pressure ring of size is made with existing process, light can be avoided to beat completely and reflected again on the wall of side, can be with
Realize pressure ring surface non-emissive.
3rd, the spacing of the 3rd lens and the 4th lens of the present utility model is A3, between the 4th lens 4 and sensitive film 6
It is A away from the thickness comprising optical filter 0.21mm4, meet： 4.5<A4/A3<5.0；0.45<A1+A2+A3+A4/TTL<0.5, the 3rd
Spacing between the lens 4 of lens 3 and the 4th is smaller, effectively controls Edge Distance,.
4th, in the utility model, aperture diaphragm is preposition, and -2.5<f2/f1<0, the wide-angle that can solve this utility model is regarded
Field compression problem, can effectively reduce height of the high angle scattered light in device interarea, make device length ultra-thin and reduce structural
Tolerance sensitivity.
5th, the first lens and the 3rd lens are located at the second lens both sides, and similar is symmetrical eyeglass, and the second lens can effectively disappear
Except aberration, the 4th lens are negative focal length lens, the surface configuration in two faces towards object plane direction be in M character form structures, can effective school
Equipment amount of distortion.
6th, in the utility model, the abbe number of each lens is met：52<lens1<60； 52<lens3<60；52<
lens4<60；30<lens1-lens2<40, can means for correcting aberration well, meet high as matter requirement.
【Brief description of the drawings】
Embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is the utility model schematic diagram；
Fig. 2 is the configuration diagram of the lens of the utility model the 4th；
Brief description of the drawings：1st, the first lens；2nd, the second lens；3rd, the 3rd lens；4th, the 4th lens；5th, optical filter；6th, it is photosensitive
Piece.
【Embodiment】
Embodiment of the present utility model is elaborated below in conjunction with the accompanying drawings.
As shown in Figure 1 to Figure 2, a kind of large aperture wide-angle compact imaging device, it is characterised in that：From object plane to image planes successively
It is provided with：
First lens 1, first lens 1 are the non-spherical lens of positive focal length, and two faces of first lens 1 are equal
For convex surface；
Second lens 2, second lens 2 are the non-spherical lens of negative focal length, and two faces of second lens 2 are equal
For concave surface；
3rd lens 3, the 3rd lens 3 are the non-spherical lens of positive focal length, and the 3rd lens are towards object plane
Simultaneously be concave surface, the 3rd lens 3 towards image planes one side be convex surface；
4th lens 4, the 4th lens 4 are the non-spherical lens of negative focal length；4th lens 4 are in M fonts；
Optical filter 5；
Sensitive film 6；In the present embodiment, optical filter is infrared fileter；
The 4th described lens 4 towards the surface effective diameter of image planes be h, surface tangent and surface normal at effective diameter h
In 90 °, the angle of the outgoing chief ray d and surface normal c at effective diameter h is e, is met：0<e<0.5 °, 1.8<h<2.0mm.
As shown in Figure 1 to Figure 2, in the present embodiment, imaging device overall length TTL, rear Jiao's overall length is FFL, meets following bar
Part：3.6mm<TTL<3.75mm,1.0mm<FFL<1.2mm.
As shown in Figure 1 to Figure 2, in the present embodiment, the first face of the first described lens 1, the second face optics effective diameter
Size is φ1、φ2, external diameter cun method is φⅠ, the described face of the second lens 2 first, the optics effective diameter in two faces are φ3、φ4, outside
Footpath cun method is φⅡ, the first face of described the 3rd lens 3, the second face optics effective diameter are φ5、φ6, external diameter cun method is φⅢ, institute
First face of the 4th lens 4 stated, the second face optics effective diameter are φ7、φ8, external diameter cun method is φⅣ, meet following condition:
0.74mm<φ1<0.76mm, 0.83<φ1/φ2<0.85,0.95mm<φ3<1.05mm, 1.0<φ3/φ4<1.05,1.0mm<
φ5<1.1 mm, 0.83<φ5/φ6<0.86,1.75mm<φ7<1.78mm, 0.85<φ7/φ8<0.9,1.0<φⅡ/φⅠ<
1.05,1.05<φⅣ/φⅢ<1.1.Such a optics effective diameter and invalid footpath ratio, the light that can be prevented effectively from into light hole are beaten
On the inner surface of structural member, reduce light-shielding sheet and press the reflection of ring-side wall.
As shown in Figure 1 to Figure 2, in the present embodiment, the focal length of first lens 1 is f1, second lens 2
Focal length is f2, the focal length of the 3rd lens 3 is f3, the focal length of the 4th lens 4 is f4, meet：-2.5<f2/f1<0, -1.5
<f4/f3<0；
The abbe number of first lens 1 is lens1, the abbe number of second lens 2 is lens2, the described 3rd
The abbe number of lens 3 is lens3, the abbe number lens of the 4th lens 44, meet following condition：52<lens1<60,
52<lens3<60；52<lens4<60；30<lens1-lens2<40。
As shown in Figure 1 to Figure 2, in the present embodiment, the spacing of the lens 2 of the first lens 1 and second is A1, it is described
The spacing of second lens 2 and the 3rd lens 3 is A2, the spacing of the 3rd lens 3 and the 4th lens 4 is A3, the 4th lens
4 be A with the spacing of sensitive film 64, then following condition is met：0.55<A1/A2<0.6,1.25<A2/A3<1.32,4.5<A4/A3<
5.0,0.45<(A1+A2+A3+A4)/TTL<0.5。
As shown in Figure 1 to Figure 2, in the present embodiment, the center thickness of first lens 1 is T1, second lens
2 center thickness is T2, the center thickness of the 3rd lens 3 is T3, the center thickness of the 4th lens 4 is T4, meet：
1.7<T1/T2<1.75,0.54<T2/T3<0.56,1.8<T3/T4<1.85,0.5<(T1+T2+T3+T4)/TTL<0.55；Wherein T1+
T2+T3+T4With A1+A2+A3+A4Meet： 1<(T1+T2+T3+T4)/(A1+A2+A3+A4)<1.1。
As shown in Figure 1 to Figure 2, in the present embodiment, a diameter of IMC of the diagonal of the sensitive film, meets：0.76<
TTL/IMC<0.8。
As shown in Figure 1 to Figure 2, in the present embodiment, the focal length of the imaging device is f, is met：0.75<f/TTL<
0.8。
As shown in Figure 1 to Figure 2, in the present embodiment, first lens 1, the second lens 2, the 3rd lens 3 and the 4th
Lens 4 are plastic lens.
As shown in Figure 1 to Figure 2, in the present embodiment, first lens 1, the second lens 2, the 3rd lens the 3, the 4th are saturating
The aspherical surface shape of mirror 4 meets equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, and y is its unit of radial coordinate and length of lens unit phase
Together, k is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola；When k-factor is equal to -1
When, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, works as k-factor
During equal to 0, the face shape curve of lens is circle, when k-factor is more than 0, and the face shape curve of lens is oblateness；α1To α8Respectively
Represent the coefficient corresponding to each radial coordinate.
Claims (10)
1. a kind of large aperture wide-angle compact imaging device, it is characterised in that：It is disposed with from object plane to image planes：
First lens (1), first lens (1) are the non-spherical lens of positive focal length, and two faces of first lens (1)
It is convex surface；
Second lens (2), second lens (2) are the non-spherical lens of negative focal length, and two faces of second lens (2)
It is concave surface；
3rd lens (3), the 3rd lens (3) are the non-spherical lens of positive focal length, and the 3rd lens are towards object plane
Simultaneously be concave surface, the 3rd lens (3) towards image planes one side be convex surface；
4th lens (4), the 4th lens (4) are the non-spherical lens of negative focal length；4th lens (4) are in " M " shape；
Optical filter (5)；
Sensitive film (6)；
The 4th described lens (4) are h towards the surface effective diameter of image planes, and the surface tangent at effective diameter h is in surface normal
90 °, the angle of the outgoing chief ray d and surface normal c at effective diameter h is e, is met：0<e<0.5°.
2. a kind of large aperture wide-angle compact imaging device according to claim 1, it is characterised in that：Imaging device overall length
TTL, rear Jiao's overall length is FFL, meets following condition：3.6mm<TTL<3.75mm,1.0mm<FFL<1.2mm.
3. a kind of large aperture wide-angle compact imaging device according to claim 2, it is characterised in that：The first described lens
(1) the first face, the second face optics effective diameter size are φ1、φ2, external diameter cun method is φⅠ, described the second lens (2) first
Face, the optics effective diameter in two faces are φ3、φ4, external diameter cun method is φⅡ, the first face of described the 3rd lens (3), the second face light
Effective diameter is φ5、φ6, external diameter cun method is φⅢ, the first face of described the 4th lens (4), the second face optics effective diameter are
φ7、φ8, external diameter cun method is φⅣ, meet following condition:0.74mm<φ1<0.76mm, 0.83<φ1/φ2<0.85,0.95mm<
φ3<1.05mm, 1.0<φ3/φ4<1.05,1.0mm<φ5<1.1mm, 0.83<φ5/φ6<0.86,1.75mm<φ7<
1.78mm, 0.85<φ7/φ8<0.9,1.0<φⅡ/φⅠ<1.05,1.05<φⅣ/φⅢ<1.1。
4. a kind of large aperture wide-angle compact imaging device according to claim 1, it is characterised in that：First lens
(1) focal length is f1, the focal length of second lens (2) is f2, the focal length of the 3rd lens (3) is f3, the 4th lens
(4) focal length is f4, meet：-2.5<f2/f1<0, -1.5<f4/f3<0；
The abbe number of first lens (1) is lens1, the abbe number of second lens (2) is lens2, the described 3rd
The abbe number of lens (3) is lens3, the abbe number lens of the 4th lens (4)4, meet following condition：52<lens1<
60,52<lens3<60；52<lens4<60；30<lens1-lens2<40。
5. a kind of large aperture wide-angle compact imaging device according to claim 2, it is characterised in that：First lens
(1) it is A with the spacing of the second lens (2)1, the spacing of second lens (2) and the 3rd lens (3) is A2, the 3rd lens
(3) it is A with the spacing of the 4th lens (4)3, the spacing of the 4th lens (4) and sensitive film (6) is A4, then following bar is met
Part：0.55<A1/A2<0.6,1.25<A2/A3<1.32,4.5<A4/A3<5.0,0.45<(A1+A2+A3+A4)/TTL<0.5。
6. a kind of large aperture wide-angle compact imaging device according to claim 5, it is characterised in that：First lens
(1) center thickness is T1, the center thickness of second lens (2) is T2, the center thickness of the 3rd lens (3) is T3,
The center thickness of 4th lens (4) is T4, meet：1.7<T1/T2<1.75,0.54<T2/T3<0.56,1.8<T3/T4<
1.85,0.5<(T1+T2+T3+T4)/TTL<0.55；Wherein T1+T2+T3+T4With A1+A2+A3+A4Meet：1<(T1+T2+T3+T4)/
(A1+A2+A3+A4)<1.1。
7. a kind of large aperture wide-angle compact imaging device according to claim 6, it is characterised in that：Pair of the sensitive film
The a diameter of IMC of linea angulata, meets：0.76<TTL/IMC<0.8.
8. a kind of large aperture wide-angle compact imaging device according to claim 7, it is characterised in that：The imaging device
Focal length is f, is met：0.75<f/TTL<0.8.
9. a kind of large aperture wide-angle compact imaging device according to claim 1, it is characterised in that：First lens
(1), the second lens (2), the 3rd lens (3) and the 4th lens (4) are plastic lens.
10. a kind of large aperture wide-angle compact imaging device according to claim 1 or 2, it is characterised in that：Described first is saturating
Mirror (1), the second lens (2), the 3rd lens (3), the aspherical surface shape of the 4th lens (4) meet equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, and its unit is identical with length of lens unit for radial coordinate by y, k
For circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola；When k-factor is equal to -1, thoroughly
The face shape curve of mirror is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0
When, the face shape curve of lens is circle, when k-factor is more than 0, and the face shape curve of lens is oblateness；α1To α8Represent respectively each
Coefficient corresponding to radial coordinate.
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| CN201621403620.0U CN206479706U (en) | 2016-12-20 | 2016-12-20 | A kind of large aperture wide-angle compact imaging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646836A (en) * | 2016-12-20 | 2017-05-10 | 中山联合光电科技股份有限公司 | Large aperture wide angle small imaging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646836A (en) * | 2016-12-20 | 2017-05-10 | 中山联合光电科技股份有限公司 | Large aperture wide angle small imaging system |
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