CN108490581A - A kind of small distortion imaging system of large aperture ultra-wide angle - Google Patents
A kind of small distortion imaging system of large aperture ultra-wide angle Download PDFInfo
- Publication number
- CN108490581A CN108490581A CN201810244489.5A CN201810244489A CN108490581A CN 108490581 A CN108490581 A CN 108490581A CN 201810244489 A CN201810244489 A CN 201810244489A CN 108490581 A CN108490581 A CN 108490581A
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- lens
- focal length
- wide angle
- imaging system
- small distortion
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- 238000003384 imaging method Methods 0.000 title claims abstract description 33
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 238000009738 saturating Methods 0.000 claims description 7
- 101100335307 Xenopus laevis foxe4 gene Proteins 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 230000005499 meniscus Effects 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/004—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having four lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
Abstract
The invention discloses a kind of small distortion imaging systems of large aperture ultra-wide angle, are equipped with cemented doublet, the 8th lens 8, the 9th lens 9, optical filter 10 and sensitive film 11 that the first lens, the second lens, the third lens are formed with cemented doublet, aperture of the diaphragm A, the 5th lens 5, the 6th lens 6 and the 7th lens 7 that the 4th lens form successively by object plane to image planes；The wherein 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 present invention 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 faces R2 have effectively neutralized the correction variable of other eyeglasses generation, ensures small distortion imaging.
Description
【Technical field】
The invention patent relates to a kind of small distortion imaging systems of large aperture ultra-wide angle.
【Background technology】
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 that solution, the present invention are exactly made in this context to it
's.
【Invention content】
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that it is super to provide a kind of large aperture
The small distortion imaging system of wide-angle.The small distortion imaging system of the large aperture ultra-wide angle realizes 100 ° of large aperture ultra-wide angle FOV or more
Amount of distortion<3% imaging meets big image planes imaging, imaging clearly.
To achieve the above object, present invention employs following technical proposals：
A kind of small distortion imaging system of large aperture ultra-wide angle, it is characterised in that：It is equipped with first successively by object plane to image planes thoroughly
Mirror, the second lens, the cemented doublet of the third lens and the 4th lens composition, 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；Described second
Lens 2 are positive focal length lens, and the one side towards object plane is 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 recessed
Face is aspherical；4th lens 4 are positive focal length lens, are biconvex lens；5th lens 5 are positive focal length lens, are double
Convex lens；6th lens 6 are positive focal length lens, are biconcave lens；7th lens 7 are positive focal length lens, are biconvex
Lens；8th lens 8 are negative focal length lens, are meniscus shaped lens；9th lens 9 are positive focal length lens, are that M shapes are saturating
Mirror；The wherein caliber size of the first lens 1 is D1, and the spacing of the first lens 1 and sensitive film 6 is TL, the total focal length of optical lens
For f, meet between D1, TL, 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 saturating
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 the third lens 3 and the 4th lens 4 are combined as 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
IMC, first lens 1 and the spacing of 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 saturating
Mirror 2, the third lens 8, the 4th lens 9 are aspherical lens, and aspherical surface shape meets equation：
In formula, parameter c is the curvature corresponding to radius, and y is radial coordinate, unit
Identical with length of lens unit, k is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbolic
Line, when k-factor is equal to -1, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape of lens is bent
Line is ellipse, and when k-factor is equal to 0, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is
It is oblate；α1To α8The coefficient corresponding to each radial coordinate is indicated respectively.
The beneficial effects of the invention are as follows：
1, the first lens 1 of the invention are negative focal length lens, and the one side towards object plane is convex aspheric surface, towards image planes
Another side be that concave surface is aspherical, effectively high angle scattered light is collapsed, realizes 100 ° of ultra wide-angle imagings, plastic rubber mirror mirror can be used
Piece reduces processing cost, and the faces R2 have effectively neutralized the correction variable of other eyeglasses generation, ensures small distortion imaging.
2, the novel entire optical texture of the present invention is effectively to control optics using aspherical and glued spheric glass structure
Aberration and optics overall length realize that small space loads, and the Geometrical MTF of system made to be greatly improved, realize high-resolution at
As requiring.
3, the present invention can meet high/low temperature requirement, and -30-60 ° of environment focusings of realization are clear.
4, FNO of the present invention<2.0, it can be achieved that high brightness, clear aperture<18mm, TTL<31mm effectively saves loading space.
【Description of the drawings】
Fig. 1 is the schematic diagram of the present invention.
Fig. 2 is the portions the A enlarged view among Fig. 1.
【Specific implementation mode】
Further detailed description is done to the present invention below in conjunction with the accompanying drawings.
As shown in Figure 1 and Figure 2, the small distortion imaging system of a kind of large aperture ultra-wide angle is equipped with first successively by object plane to image planes
Lens 1, the second lens 2, the cemented doublet of the third lens 3 and the 4th lens 4 composition, aperture of the diaphragm A, the 5th lens the 5, the 6th are thoroughly
Cemented doublet, the 8th lens 8, the 9th lens 9, optical filter 10 and the sensitive film 11 of mirror 6 and the 7th lens 7 composition；Described first thoroughly
Mirror 1 is negative focal length lens, and the one side towards object plane is convex aspheric surface, and the another side towards image planes is that concave surface is aspherical, mirror
Plate shape largely influences the size of amount of distortion；Second lens 2 are positive focal length lens, and the one side towards object plane is convex
Face is aspherical, and the another side towards image planes is that concave surface is aspherical；The third lens 3 are negative focal length lens, towards object plane
It is that concave surface is aspherical on one side, the another side towards image planes is also that concave surface is aspherical；4th lens 4 are positive focal length lens, are
Biconvex lens；5th lens 5 are positive focal length lens, are biconvex lens；6th lens 6 are positive focal length lens, are double
Concavees lens；7th lens 7 are positive focal length lens, are biconvex lens, and two groups of cemented doublet groups optimize the color of whole system
Poor situation；8th lens 8 are negative focal length lens, are meniscus shaped lens；9th lens 9 are positive focal length lens, are that M shapes are saturating
Mirror；The wherein caliber size of the first lens 1 is D1, and the spacing of the first lens 1 and sensitive film 6 is TL, the total focal length of optical lens
For f, meet between D1, TL, f：0.2<f/TL<0.3,0.6<D1/TL<0.4, wherein D1 sizes.
As shown in Figure 1 and Figure 2, the small distortion imaging system of large aperture ultra-wide angle according to claim 1, feature exist
In：First lens 1, the 8th lens 8, the 9th lens 9, are non-spherical lens at second lens 2, and the third lens the 3, the 4th are saturating
Mirror 4, the 5th lens 5, the 6th lens 6,7 lens of the 7th lens are spherical lens, and wherein the third lens 3 are combined with the 4th lens 4
For cemented doublet, 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 small distortion imaging system of large aperture ultra-wide angle according to claim 1, feature exist
In：The height of the sensitive film 11 is IMC, and first lens 1 and the spacing of the sensitive film 11 are TL, between IMC and TL
Meet：3.7<TL/IMC<4.3.
According to the small distortion imaging system of large aperture ultra-wide angle described in claim 1, the second lens 2, the 9th lens 9 are mirror
Piece aspherical lens can equally meet system requirements, if being adjusted to plastic cement aspherical lens, together if it is aspherical to be changed to plastic cement
Sample satisfiability can require, 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 the 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 more than 0, the face shape curve of lens is oblateness；α1To α8It indicates respectively 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 equipped with by object plane to image planes successively
(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), the 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 lens, 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 lens, are double
Convex lens；5th lens (5) are positive focal length lens, are biconvex lens；6th lens (6) are positive focal length lens, are
Biconcave lens；7th lens (7) are positive focal length lens, are biconvex lens；8th lens (8) are negative focal length lens, are
Meniscus shaped lens；9th lens (9) are positive focal length lens, are M shape lens；The caliber size of wherein the first lens (1) is
The spacing of D1, 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。
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 meets 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) is combined as 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, are 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 the aspherical lens, -10-50 ° of work of optimization high/low temperature
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 the curvature corresponding to radius, is (y) radial coordinate, and unit is identical with length of lens unit, is (k) 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 more than 0, the face shape curve of lens is oblateness；(α1) to (α8) respectively
Indicate the coefficient corresponding to each radial coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810244489.5A CN108490581A (en) | 2018-03-23 | 2018-03-23 | A kind of small distortion imaging system of large aperture ultra-wide angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810244489.5A CN108490581A (en) | 2018-03-23 | 2018-03-23 | A kind of small distortion imaging system of large aperture ultra-wide angle |
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| Publication Number | Publication Date |
|---|---|
| CN108490581A true CN108490581A (en) | 2018-09-04 |
Family
ID=63319702
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|---|---|---|---|
| CN201810244489.5A Pending CN108490581A (en) | 2018-03-23 | 2018-03-23 | A kind of small distortion imaging system of large aperture ultra-wide angle |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108845405A (en) * | 2018-09-25 | 2018-11-20 | 云南博硕信息技术有限公司 | Wide spectrum double-view field monitoring camera dual-purpose round the clock |
| CN109116519A (en) * | 2018-10-19 | 2019-01-01 | 中山联合光电科技股份有限公司 | A kind of large aperture wide-angle monitoring imaging system |
| 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 |
| CN110879458A (en) * | 2018-09-06 | 2020-03-13 | 信泰光学(深圳)有限公司 | Wide-angle lens |
| CN110941086A (en) * | 2019-12-19 | 2020-03-31 | 福建福光股份有限公司 | Ultra-short low-distortion shimmer imaging optical system |
| CN112230376A (en) * | 2020-10-30 | 2021-01-15 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112230377A (en) * | 2020-10-30 | 2021-01-15 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
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2018
- 2018-03-23 CN CN201810244489.5A patent/CN108490581A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879458A (en) * | 2018-09-06 | 2020-03-13 | 信泰光学(深圳)有限公司 | Wide-angle lens |
| CN108845405A (en) * | 2018-09-25 | 2018-11-20 | 云南博硕信息技术有限公司 | Wide spectrum double-view field monitoring camera dual-purpose round the clock |
| CN108845405B (en) * | 2018-09-25 | 2020-06-12 | 云南博硕信息技术有限公司 | Wide-spectrum day and night dual-purpose double-view-field monitoring lens |
| CN109116519A (en) * | 2018-10-19 | 2019-01-01 | 中山联合光电科技股份有限公司 | A kind of large aperture wide-angle monitoring imaging system |
| CN109116519B (en) * | 2018-10-19 | 2024-01-09 | 中山联合光电科技股份有限公司 | Large-aperture wide-angle monitoring imaging system |
| 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 |
| CN110941086A (en) * | 2019-12-19 | 2020-03-31 | 福建福光股份有限公司 | Ultra-short low-distortion shimmer imaging optical system |
| CN110941086B (en) * | 2019-12-19 | 2021-12-28 | 福建福光股份有限公司 | Ultra-short low-distortion shimmer imaging optical system |
| CN112230376A (en) * | 2020-10-30 | 2021-01-15 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112230377A (en) * | 2020-10-30 | 2021-01-15 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112230377B (en) * | 2020-10-30 | 2021-09-24 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112230376B (en) * | 2020-10-30 | 2021-10-01 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
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Application publication date: 20180904 |