CN208110148U - A kind of large aperture ultra-wide angle imaging system - Google Patents
A kind of large aperture ultra-wide angle imaging system Download PDFInfo
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- CN208110148U CN208110148U CN201820405995.3U CN201820405995U CN208110148U CN 208110148 U CN208110148 U CN 208110148U CN 201820405995 U CN201820405995 U CN 201820405995U CN 208110148 U CN208110148 U CN 208110148U
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- wide angle
- imaging system
- large aperture
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Abstract
The utility model discloses a kind of large aperture ultra-wide angle imaging systems, are successively arranged cemented doublet, the 8th lens 8, the 9th lens 9, optical filter 10 and the sensitive film 11 that cemented doublet, aperture of the diaphragm A, the 5th lens 5, the 6th lens 6 and the 7th lens 7 that the first lens, the second lens, the third lens and the 4th lens form form by object plane to image planes；Wherein the caliber size of the first lens 1 is D1, and the spacing of the first lens 1 and sensitive film 6 is TL, and the total focal length of optical lens is f, is met between D1, TL, f：0.2<f/TL<0.3,0.6<D1/TL<0.4.The utility model effectively collapses high angle scattered light, realizes 100 ° of ultra wide-angle imagings, and plastic rubber mirror eyeglass can be used, and reduces processing cost, and the face R2 has effectively neutralized the correction variable of other eyeglasses generation, guarantees small distortion imaging.
Description
【Technical field】
The utility model patent is related to a kind of large aperture ultra-wide angle imaging system.
【Background technique】
Existing optical lens, TV of the universal field angle near 100 degree distort 10% or more, and picture deflection is big,
Application range is also extremely limited.
Since there are the above problems, it is necessary to propose solution to it, the utility model is exactly in this context
It makes.
【Summary of the invention】
The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide a kind of big light
Enclose ultra-wide angle imaging system.It is abnormal that the small distortion imaging system of the large aperture ultra-wide angle realizes 100 ° of large aperture ultra-wide angle FOV or more
Variable<3% imaging meets big image planes imaging, imaging clearly.
To achieve the above object, the utility model uses following technical proposals：
A kind of large aperture ultra-wide angle imaging system, it is characterised in that：First lens, second are successively arranged by object plane to image planes
Cemented doublet, aperture of the diaphragm A, the 5th lens 5, the 6th lens 6 and the 7th lens 7 of lens, the third lens and the 4th lens composition
The cemented doublet of composition, the 8th lens 8, the 9th lens 9, optical filter 10 and sensitive film 11；First lens 1 are that negative focal length is saturating
Mirror, the one side towards object plane are convex aspheric surface, and the another side towards image planes is that concave surface is aspherical；Second lens 2 are
Positive focal length lens, the one side towards object plane are convex aspheric surface, and the another side towards image planes is that concave surface is aspherical；The third
Lens 3 are negative focal length lens, and the one side towards object plane is that concave surface is aspherical, and the another side towards image planes is also concave surface aspheric
Face；4th lens 4 are positive focal length lenses, are biconvex lens；5th lens 5 are positive focal length lenses, are biconvex lens；
6th lens 6 are positive focal length lenses, are biconcave lens；7th lens 7 are positive focal length lenses, are biconvex lens；Institute
Stating the 8th lens 8 is negative focal length lens, is meniscus shaped lens；9th lens 9 are positive focal length lenses, are M shape lens；Wherein
The caliber size of one lens 1 is D1, and the spacing of the first lens 1 and sensitive film 6 is TL, and the total focal length of optical lens is f, D1, TL,
Meet between f：0.2<f/TL<0.3, 0.6<D1/TL<0.4.
The small distortion imaging system of large aperture ultra-wide angle as described above, it is characterised in that：The focal length of first lens 1 is
F1, second lens 2 focal length be f2, the focal length of the third lens 3 is f3, the focal length of the 4th lens 4 be f4,
The focal length of 5th lens 5 is f5, the focal length of the 6th lens 6 is f6, the focal length of the 7th lens 7 is f7, described
The focal length of 8th lens 8 is f8, the focal length of the 9th lens 9 is f9, is met between f1, f2, f8, f9： -3<f2/f1<-
1；；-5<f9/f8<-5.
The small distortion imaging system of large aperture ultra-wide angle as described above, it is characterised in that：The dispersion system of first lens 1
Number is lens1, the abbe number lens8 of the 8th lens 8；Wherein lens1, lens8 coefficient meet following condition：40<
lens1<60；45<lens8<50.
The small distortion imaging system of large aperture ultra-wide angle as described above, it is characterised in that：First lens, 1 object side surface
Distance to aperture of the diaphragm A is T1, and the distance of aperture of the diaphragm A to image planes is T2, is met between T1 and T2：0.5<T1/T2<
1.0。
The small distortion imaging system of large aperture ultra-wide angle as described above, it is characterised in that：First lens 1, second are thoroughly
Mirror 2, the 8th lens 8, the 9th lens 9, be non-spherical lens, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6,
7th lens, 7 lens are spherical lens, and wherein 4 groups of the third lens 3 and the 4th lens are combined into cemented doublet, the 5th lens 5, the
Six lens 6,7 lens combination of the 7th lens are three balsaming lens.
The small distortion imaging system of large aperture ultra-wide angle as described above, it is characterised in that：The height of the sensitive film 11 is
The spacing of IMC, first lens 1 and the sensitive film 11 are TL, are met between IMC and TL：3.7<TL/IMC<4.3.
The small distortion imaging system of large aperture ultra-wide angle as described above, it is characterised in that：Second lens 2, the 9th lens 9 are
Glass aspheric eyeglass can be adjusted to plastic cement aspherical lens, optimize -10-50 ° of working performances of high/low temperature.
The small distortion imaging system of large aperture ultra-wide angle as described above, it is characterised in that：First lens 1, second are thoroughly
Mirror 2, the third lens 8, the 4th lens 9 are aspherical lens, and aspherical surface shape meets equation：
In formula, parameter c is curvature corresponding to radius, and y is radial coordinate, and unit is identical with length of lens unit, and 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, lens
Face shape curve be 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, and when k-factor is greater than 0, the face shape curve of lens is oblateness；α1To α8It respectively indicates each
Coefficient corresponding to radial coordinate.
The utility model has the beneficial effects that：
1, first lens 1 of the utility model are negative focal length lens, and the one side towards object plane is convex aspheric surface, direction
The another side of image planes is that concave surface is aspherical, effectively collapses high angle scattered light, realizes 100 ° of ultra wide-angle imagings, and plastic cement can be used
Mirror eyeglass reduces processing cost, and the face R2 has effectively neutralized the correction variable of other eyeglasses generation, guarantees small distortion imaging.
2, the novel entire optical texture of the utility model is effectively controlled using aspherical and glued spheric glass structure
Optical Chromatic and optics overall length realize that small space loads, and the Geometrical MTF of system are made to be greatly improved, and realize high definition
Clear imaging requirements.
3, the utility model can meet high/low temperature requirement, and -30-60 ° of environment focusings of realization are clear.
4, the utility model FNO<2.0, it can be achieved that high brightness, clear aperture<18mm, TTL<31mm is effectively saved and is loaded
Space.
【Detailed description of the invention】
Fig. 1 is the schematic diagram of the utility model.
Fig. 2 is the portion the A enlarged view among Fig. 1.
【Specific embodiment】
Further detailed description is done to the utility model with reference to the accompanying drawing.
As shown in Figure 1 and Figure 2, a kind of large aperture ultra-wide angle imaging system, by object plane to image planes be successively arranged the first lens 1,
Second lens 2, the third lens 3 and the 4th lens 4 composition cemented doublet, aperture of the diaphragm A, the 5th lens 5, the 6th lens 6 and
Cemented doublet, the 8th lens 8, the 9th lens 9, optical filter 10 and the sensitive film 11 of 7th lens 7 composition；First lens 1 are
Negative focal length lens, the one side towards object plane are convex aspheric surface, and the another side towards image planes is that concave surface is aspherical, lens shape
Largely influence the size of amount of distortion；Second lens 2 are positive focal length lenses, and the one side towards object plane is convex surface aspheric
Face, the another side towards image planes are that concave surface is aspherical；The third lens 3 are negative focal length lens, and the one side towards object plane is
Concave surface is aspherical, and the another side towards image planes is also that concave surface is aspherical；4th lens 4 are positive focal length lenses, are lenticular
Mirror；5th lens 5 are positive focal length lenses, are biconvex lens；6th lens 6 are positive focal length lenses, are biconcave lens；
7th lens 7 are positive focal length lenses, are biconvex lens, and two groups of cemented doublet groups optimize the color difference situation of whole system；
8th lens 8 are negative focal length lens, are meniscus shaped lens；9th lens 9 are positive focal length lenses, are M shape lens；Wherein
The caliber size of first lens 1 is D1, and the spacing of the first lens 1 and sensitive film 6 is TL, and the total focal length of optical lens is f, D1,
Meet between TL, f：0.2<f/TL<0.3,0.6<D1/TL<0.4, wherein D1 size.
As shown in Figure 1 and Figure 2, the first lens 1, the second lens 2, the 8th lens 8, the 9th lens 9, be non-spherical lens, the
Three lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6,7 lens of the 7th lens be spherical lens, wherein the third lens 3 with
4th 4 groups of lens are combined into cemented doublet, and the 5th lens 5, the 6th lens 6,7 lens combination of the 7th lens are three balsaming lens.
As shown in Figure 1 and Figure 2, the height of the sensitive film 11 is IMC, between first lens 1 and the sensitive film 11
Away from for TL, meet between IMC and TL：3.7<TL/IMC<4.3.
Second lens 2, the 9th lens 9 are eyeglass aspherical lens, if it is aspherical to be changed to plastic cement, can equally meet and are
System requires, if being adjusted to plastic cement aspherical lens, same satisfiability can be required, and can optimize high/low temperature working condition.
As shown in Figure 1 and Figure 2, in the present embodiment, first lens 1, the second lens 2, the third lens 3, the 4th lens
5, the 5th lens 6 and the 6th lens 7 are aspherical, and aspherical surface shape meets equation：
In formula, parameter c is curvature corresponding to radius, and y is radial coordinate, and unit is identical with length of lens unit, and 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, lens
Face shape curve be 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, and when k-factor is greater than 0, the face shape curve of lens is oblateness；α1To α8It respectively indicates each
Coefficient corresponding to radial coordinate.
Claims (8)
1. a kind of small distortion imaging system of large aperture ultra-wide angle, it is characterised in that：First lens are successively arranged by object plane to image planes
(1), cemented doublet, the aperture of the diaphragm (A), the 5th lens that the second lens (2), the third lens (3) are formed with the 4th lens (4)
(5), cemented doublet, the 8th lens (8), the 9th lens (9), optical filter (10) of the 6th lens (6) and the 7th lens (7) composition
With sensitive film (11)；First lens (1) are negative focal length lens, and the one side towards object plane is convex aspheric surface, towards picture
The another side in face is that concave surface is aspherical；Second lens (2) are positive focal length lenses, and the one side towards object plane is convex surface aspheric
Face, the another side towards image planes are that concave surface is aspherical；The third lens (3) are negative focal length lens, towards the one side of object plane
Aspherical for concave surface, the another side towards image planes is also that concave surface is aspherical；4th lens (4) are positive focal length lenses, are double
Convex lens；5th lens (5) are positive focal length lenses, are biconvex lens；6th lens (6) are positive focal length lenses, are
Biconcave lens；7th lens (7) are positive focal length lenses, are biconvex lens；8th lens (8) are negative focal length lens, are
Meniscus shaped lens；9th lens (9) are positive focal length lenses, are M shape lens；Wherein the caliber size of the first lens (1) is
D1, the spacing of the first lens (1) and sensitive film (6) are TL, and the total focal length of optical lens is f, are met between D1, TL, f：0.2<
f/TL<0.3,0.6<D1/TL<0.4。
2. the small distortion imaging system of a kind of large aperture ultra-wide angle according to claim 1, it is characterised in that：Described first thoroughly
The focal length of mirror (1) is f1, the focal length of second lens (2) is f2, the focal length of the third lens (3) is f3, the described 4th
The focal length of lens (4) is f4, the focal length of the 5th lens (5) is f5, the focal length of the 6th lens (6) is f6, described
The focal length of seven lens (7) is f7, the focal length of the 8th lens (8) is f8, the focal length of the 9th lens (9) is f9, f1,
Meet between f2, f8, f9：-3<f2/f1<-1；；-5<f9/f8<-5.
3. the small distortion imaging system of a kind of large aperture ultra-wide angle according to claim 1, it is characterised in that：Described first thoroughly
The abbe number of mirror (1) is lens1, the abbe number lens8 of the 8th lens (8)；Wherein lens1, lens8 coefficient meet
Following condition：40<lens1<60；45<lens8<50.
4. the small distortion imaging system of a kind of large aperture ultra-wide angle according to claim 1, it is characterised in that：Described first thoroughly
The distance of mirror (1) object side surface to the aperture of the diaphragm (A) is T1, and the distance of the aperture of the diaphragm (A) to image planes is T2, full between T1 and T2
Foot：0.5<T1/T2<1.0.
5. the small distortion imaging system of a kind of large aperture ultra-wide angle according to claim 1, it is characterised in that：Described first thoroughly
Mirror (1), the 8th lens (8), the 9th lens (9), is non-spherical lens, the third lens (3), the 4th lens at the second lens (2)
(4), the 5th lens (5), the 6th lens (6), the 7th lens (7) lens are that spherical lens, wherein the third lens (3) and the 4th are saturating
Mirror (4) group is combined into cemented doublet, and the 5th lens (5), the 6th lens (6), the 7th lens (7) lens combination are three glued saturating
Mirror.
6. the small distortion imaging system of a kind of large aperture ultra-wide angle according to claim 1, it is characterised in that：The sensitive film
(11) height is IMC, and first lens (1) and the spacing of the sensitive film (11) are TL, is met between IMC and TL：3.7
<TL/IMC<4.3。
7. the small distortion imaging system of a kind of large aperture ultra-wide angle according to claim 1, it is characterised in that：Second lens
(2), the 9th lens (9) are Glass aspheric eyeglass, can be adjusted to plastic cement aspherical lens, optimize -10-50 ° of high/low temperature work
Performance.
8. the small distortion imaging system of a kind of large aperture ultra-wide angle according to claim 1, it is characterised in that：Described first thoroughly
Mirror (1), the second lens (2), the third lens (8), the 4th lens (9) are aspherical lens, aspherical surface shape satisfaction side
Journey： In formula,
Parameter (c) is curvature corresponding to radius, is (y) radial coordinate, and unit is identical with length of lens unit, (k) is circular cone two
Secondary curve coefficients；When (k) coefficient is less than -1, the face shape curve of lens is hyperbola, when (k) coefficient is equal to -1, lens
Face shape curve is parabola；When (k) coefficient is between -1 to 0, the face shape curve of lens is ellipse, when (k) coefficient is equal to 0
When, the face shape curve of lens is circle, and when (k) coefficient is greater than 0, the face shape curve of lens is oblateness；(α1) to (α8) respectively
Indicate coefficient corresponding to each radial coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820405995.3U CN208110148U (en) | 2018-03-23 | 2018-03-23 | A kind of large aperture ultra-wide angle imaging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820405995.3U CN208110148U (en) | 2018-03-23 | 2018-03-23 | A kind of large aperture ultra-wide angle imaging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109407281A (en) * | 2018-12-18 | 2019-03-01 | 中山联合光电科技股份有限公司 | A kind of interior optical lens of focusing of monolithic |
| CN112946860A (en) * | 2019-12-11 | 2021-06-11 | 信泰光学(深圳)有限公司 | Wide-angle lens |
-
2018
- 2018-03-23 CN CN201820405995.3U patent/CN208110148U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109407281A (en) * | 2018-12-18 | 2019-03-01 | 中山联合光电科技股份有限公司 | A kind of interior optical lens of focusing of monolithic |
| CN112946860A (en) * | 2019-12-11 | 2021-06-11 | 信泰光学(深圳)有限公司 | Wide-angle lens |
| US11774729B2 (en) | 2019-12-11 | 2023-10-03 | Sintai Optical (Shenzhen) Co., Ltd. | Wide-angle lens assembly |
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