CN106842520A - A kind of high definition panorama looks around optical imaging system - Google Patents
A kind of high definition panorama looks around optical imaging system Download PDFInfo
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- CN106842520A CN106842520A CN201710201340.4A CN201710201340A CN106842520A CN 106842520 A CN106842520 A CN 106842520A CN 201710201340 A CN201710201340 A CN 201710201340A CN 106842520 A CN106842520 A CN 106842520A
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
Optical imaging system is looked around the invention discloses a kind of high definition panorama, is sequentially provided with from object plane to image planes：Front lens group, the focal power of front lens group is that negative, described front lens group includes the first lens, the second lens and the 3rd lens；First lens and the second power of lens are negative, and the 3rd power of lens is for just；Diaphragm；Rear lens group, the focal power of rear lens group is for just, rear lens group includes the 4th lens, the 5th lens, the 6th lens；4th lens and the 6th power of lens are for just, the 5th power of lens is negative；Optical filter；Protective glass.The present invention realizes the high definition camera lens of the ultra wide-angle, big relative aperture and mega pixel at 230 ° of maximum field of view angle, can be used for three-dimensional reconstruction, panorama and browse the aspects such as video monitoring, ball-screen projection, imaging system still has definition higher within the temperature range of 40 DEG C~+85 DEG C, is particularly well-suited to bad environments vehicle environment.
Description
【Technical field】
Optical imaging system is looked around the present invention relates to optical system, especially a kind of high definition panorama.
【Background technology】
Current three-dimensional reconstruction, panorama browse that video monitoring development is like a raging fire, and its a whole set of imaging system often uses many
Lens imaging, then carrying out image synthesis and splicing could realize that this negative effect for bringing is the increase of camera lens cost；Just
The adverse circumstances such as temperature also influence the performance and stability of imaging system.
Therefore, the present invention is based on the not enough of the above and produces.
【The content of the invention】
The technical problem to be solved in the present invention is to provide a kind of high definition panorama and looks around optical imaging system, the system cost
Low, definition is high, the angle of visual field is big, thang-kng ability is strong, can meet browse in three-dimensional reconstruction, panorama, video monitoring, on-vehicle lens
The imaging requirements in field.
In order to solve the above technical problems, present invention employs following technical proposals：A kind of high definition panorama looks around optical imagery
System, it is characterised in that be sequentially provided with from object plane to image planes：
Front lens group, the focal power of the front lens group is that negative, described front lens group includes the first lens, the second lens
With the 3rd lens；First lens and second power of lens are negative, and the 3rd power of lens is for just；
Diaphragm；
Rear lens group, for just, described rear lens group includes the 4th lens, the 5th saturating for the focal power of the rear lens group
Mirror, the 6th lens；4th lens and the 6th power of lens are for just, the 5th power of lens is negative；
Optical filter；
Protective glass.
A kind of high definition panorama as described above looks around optical imaging system, it is characterised in that：First lens are direction
The surface of object plane is convex surface, is the meniscus lens of concave surface towards the surface of image planes；It towards the surface of object plane is convex that second lens are
Face, towards the surface of image planes be concave surface meniscus lens；Two faces of the 3rd lens are convex surface.
A kind of high definition panorama as described above looks around optical imaging system, it is characterised in that：Two of 4th lens
Face is convex surface, and the 5th lens are to be concave surface, be the meniscus lens on convex surface, the 6th towards the surface of object plane towards the surface of image planes
Two faces of lens are convex surface.
A kind of high definition panorama as described above looks around optical imaging system, it is characterised in that：Described front lens group, it is rear thoroughly
Microscope group meets：
-11.2≤Fbefore≤-5.5；-13.6≤Fbefore/F≤-6.1；
2.41≤Fafter≤2.72；2.68≤Fafter/F≤3.49；
1.85≤|Fbefore/Fafter|≤4.7；
Wherein, FbeforeIt is the focal length of front lens group, FafterIt is the focal length of rear lens group, F is the total focal length of optical system.
A kind of high definition panorama as described above looks around optical imaging system, it is characterised in that：Described the first lens, the 3rd
The refractive index and Abbe number of lens and the 5th lens meet：
1.7≤Nd1≤1.9；45≤Vd1≤65；
Nd3≥1.8；Vd3≤23；
Nd5≥1.55；Vd5≤25；
Wherein, Nd1、Nd3、Nd5Respectively the first lens, the 3rd lens, the refractive index of the 5th lens；Vd1、Vd3、Vd5Point
Wei not the first lens, the 3rd lens, the Abbe number of the 5th lens.
A kind of high definition panorama as described above looks around optical imaging system, it is characterised in that meet：
1.8≤ET2/T2≤4；
2.68≤Φ1/MIC≤3.3；
2.3≤A6/F≤3.0；
Wherein, ET2、T2The edge thickness and center thickness of respectively the second lens, Φ1It is the caliber size of the first lens,
MIC represents maximum imaging surface, A6It is the minimum range of the 6th lens to image planes.
A kind of high definition panorama as described above looks around optical imaging system, it is characterised in that：Described optical lens is always regarded
Rink corner and camera lens overall length meet respectively：
170°≤2W≤230°；14≤TTL/F≤17.2；
In formula, 2W is the angle of visual field of camera lens, and TTL is the summit of the first lens to the distance of image planes.
A kind of high definition panorama as described above looks around optical imaging system, it is characterised in that：It is second lens, the 4th saturating
Mirror, the 5th lens, the 6th lens are plastic aspheric lenes, and the 4th described lens and the 5th lens use plastic lens glue
Close, the cemented surface of the 4th lens and the 5th lens is sphere or aspherical.
A kind of high definition panorama as described above looks around optical imaging system, it is characterised in that：Described the first lens, the 3rd
Lens are spherical glass lens；Second lens, the 4th lens, the 5th lens, the 6th lens are plastic aspheric lenes, and are met
Non-spherical lens formula：
In formula, parameter c is the curvature corresponding to radius, and its unit is identical with length of lens unit for radial coordinate for y,
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, 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, and when k-factor is more than 0, the face shape curve of lens is oblateness；α1To α8Represent respectively each
Coefficient corresponding to radial coordinate.
Compared with prior art, a kind of high definition panorama of the invention looks around optical imaging system, has reached following effect：
1st, the present invention realizes the high definition mirror of the ultra wide-angle, big relative aperture and mega pixel at 230 ° of maximum field of view angle
Head, can be used for three-dimensional reconstruction, panorama and browses the aspects such as video monitoring, ball-screen projection, temperature of the imaging system at -40 DEG C~+85 DEG C
Still there is definition higher in the range of degree, bad environments vehicle environment is particularly well-suited to.
2nd, reasonable distribution refractive index of the present invention and Abbe number, effective correction system axial chromatic aberration is excessive, and can guarantee that first
Lens have less bore, camera lens are minimized more helpful.
3rd, the present invention is provided with the protective glass of optical filter and imageing sensor, can filter a part of light to reduce veiling glare
With hot spot etc., with good color reducibility while making image color beautiful and be sharp keen.
4th, present invention introduces plastic aspheric lenes, camera lens volume can be effectively reduced, moreover it is possible to realize resolution ratio higher.
【Brief description of the drawings】
Specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is schematic diagram of the present invention；
Fig. 2 is the MTF VS field curve maps under 125lp/mm of the invention；
Fig. 3 is chromatic curve figure of the invention；
Fig. 4 is+20 DEG C of defocus MTF curve figures of high temperature of the invention；
Fig. 5 is+85 DEG C of defocus MTF curve figures of high temperature of the invention；
Fig. 6 is -40 DEG C of defocus MTF curve figures of low temperature of the invention；
Brief description of the drawings：1st, the first lens；2nd, the second lens；3rd, the 3rd lens；4th, the 4th lens；5th, the 5th lens；6th,
Six lens；7th, optical filter；8th, protective glass；9th, diaphragm；10th, image planes.
【Specific embodiment】
Embodiments of the present invention are elaborated below in conjunction with the accompanying drawings.
As shown in Figures 1 to 6, a kind of high definition panorama looks around optical imaging system, is sequentially provided with from object plane to image planes 10：
Front lens group 100, the focal power of the front lens group 100 is that negative, described front lens group 100 includes the first lens
1st, the second lens 2 and the 3rd lens 3；The focal power of first lens 1 and second lens 2 is negative, the 3rd lens 3
Focal power for just；
Diaphragm 9；
Rear lens group 200, the focal power of the rear lens group 200 is for just, described rear lens group 200 includes the 4th lens
4th, the 5th lens 5, the 6th lens 6；The focal power of the 4th lens 4 and the 6th lens 6 is the just light of the 5th lens 5
Focal power is negative；
Optical filter 7；
Protective glass 8；Setting optical filter and protective glass can filter a part of light to reduce veiling glare and hot spot etc., make figure
As color it is beautiful and sharp keen while with good color reducibility.
The present invention realizes the high definition mirror of the ultra wide-angle, big relative aperture and mega pixel at 220 ° of maximum field of view angle
Head, can be used for three-dimensional reconstruction, panorama and browses the aspects such as video monitoring, ball-screen projection, temperature of the imaging system at -40 DEG C~+85 DEG C
Still there is definition higher in the range of degree, bad environments vehicle environment is particularly well-suited to.
As shown in Figures 1 to 6, in the present embodiment, it towards the surface of object plane is convex surface, direction that first lens 1 are
The surface of image planes 10 is the meniscus lens of concave surface；It towards the surface of object plane is convex surface, the surface towards image planes 10 that second lens 2 are
It is the meniscus lens of concave surface；Two faces of the 3rd lens 3 are convex surface.
As shown in Figures 1 to 6, in the present embodiment, two faces of the 4th lens 4 are convex surface, and the 5th lens 5 are
Surface towards object plane is concave surface, towards the surface of image planes 10 is the meniscus lens on convex surface, and two faces of the 6th lens 6 are convex
Face；6th lens can produce the characteristics of contrary flexure, contrary flexure to be mainly improvement periphery and regard towards a face edge imaging region of image planes 10
The MTF performances and relative illumination of field.
As shown in Figures 1 to 6, in the present embodiment, described front lens group 100, rear lens group 200 meet：
-11.2≤Fbefore≤-5.5；-13.6≤Fbefore/F≤-6.1；
2.41≤Fafter≤2.72；2.68≤Fafter/F≤3.49；
1.85≤|Fbefore/Fafter|≤4.7；
Wherein, FbeforeIt is the focal length of front lens group 100, FafterIt is the focal length of rear lens group 200, F is total for optical system
Focal length；Effectively the angle of visual field wide can be converged into optical system, and reduce the tolerance sensitivity of optical system.
As shown in Figures 1 to 6, in the present embodiment, the folding of described the first lens 1, the 3rd lens 3 and the 5th lens 5
Penetrate rate and Abbe number meets：
1.7≤Nd1≤1.9；45≤Vd1≤65；
Nd3≥1.8；Vd3≤23；
Nd5≥1.55；Vd5≤25；
Wherein, Nd1、Nd3、Nd5Respectively the first lens 1, the 3rd lens 3, the refractive index of the 5th lens 5；Vd1、Vd3、Vd5
Respectively the first lens 1, the 3rd lens 3, the Abbe number of the 5th lens 5；The distribution of this refractive index and Abbe number, effectively correction
System axial aberration is excessive, and can guarantee that the first lens have less bore, and this minimizes more helpful to camera lens.
As shown in Figures 1 to 6, in the present embodiment, meet：
1.8≤ET2/T2≤4；
2.68≤Φ1/MIC≤3.3；
2.3≤A6/F≤3.0；
Wherein, ET2、T2The respectively edge thickness and center thickness of the second lens 2, Φ1For the bore of the first lens 1 is big
Small, MIC represents maximum imaging surface, A6The minimum range of image planes 10 is most arrived for the 6th lens 6；Effectively shorten camera lens overall length so that
Optical system has bigger aperture.
As shown in Figures 1 to 6, in the present embodiment, the total angle of visual field of described optical lens and camera lens overall length meet respectively：
170°≤2W≤230°；14≤TTL/F≤17.2；
In formula, 2W is the angle of visual field of camera lens, and TTL is the summit of the first lens 1 to the distance of image planes 10.
As shown in Figures 1 to 6, in the present embodiment, second lens 2, the 4th lens 4, the 5th lens the 5, the 6th are saturating
Mirror 6 is plastic aspheric lenes, and the 4th lens 4 and the 5th lens 5 are using plastic lens gluing, the 4th lens 4 and the 5th lens 5
Cemented surface can be sphere or aspherical.
As shown in Figures 1 to 6, in the present embodiment, the first described lens 1, the 3rd lens 3 are spherical glass lens；
Second lens 2, the 4th lens 4, the 5th lens 5, the 6th lens 6 are plastic aspheric lenes, and meet non-spherical lens formula：
In formula, parameter c is the curvature corresponding to radius, and its unit is identical with length of lens unit for radial coordinate for y,
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, 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, and when k-factor is more than 0, the face shape curve of lens is oblateness；α1To α8Represent respectively each
Coefficient corresponding to radial coordinate.The introducing of plastic aspheric lenes, can effectively reduce camera lens volume, moreover it is possible to realize higher dividing
Resolution.
In this optical system, main optical parametric is as follows：
F=0.88mm, A6=2.3mm, TTL=12.6mm, 2W=220 °, FNO=2.0
Wherein, FNO represents the inverse of relative aperture.
High definition panorama of the invention looks around the lens optical parameter such as following table of optical imaging system：
| Surface | Type | R | Thickness | Nd | Vd |
| 1 | STANDARD | 11.00 | 0.85 | 1.804 | 46.5 |
| 2 | STANDARD | 3.17 | 2.10 | ||
| 3 | EVENASPH | 8.02 | 0.70 | 1.535 | 56.115 |
| 4 | EVENASPH | 0.98 | 1.52 | ||
| 5 | STANDARD | 7.39 | 1.84 | 1.946 | 17.9 |
| 6 | STANDARD | -7.39 | 0.68 | ||
| 7 | STANDARD | INFINITY | -0.01 | ||
| 8 | EVENASPH | 2.99 | 1.28 | 1.535 | 56.115 |
| 9 | EVENASPH | -1.09 | 0.41 | 1.6425 | 22.465 |
| 10 | EVENASPH | -12.94 | 0.21 | ||
| 11 | EVENASPH | 5.19 | 0.84 | 1.535 | 56.115 |
| 12 | EVENASPH | -2.33 | 0.20 | ||
| 13 | STANDARD | INFINITY | 0.70 | ||
| 14 | STANDARD | INFINITY | 1.37 | ||
| 15 | STANDARD | INFINITY | 0.00 |
In upper table, R represent radius of curvature, Thickness represent center thickness, Nd represent refractive index, Vd represent Abbe number,
STANDARD represents spherical lens, EVENASPH and represents even aspheric surface, meets non-spherical lens formula.
Asphericity coefficient such as following table：
| 3 | -9.23E-09 | |
| 4 | 1.16E-05 | |
| 8 | -2.12E-03 | -2.34E-02 |
| 9 | -1.81E-02 | -4.42E-02 |
| 10 | 6.97E-04 | -5.57E-05 |
| 11 | 9.86E-05 | 4.78E-05 |
| 12 | -6.65E-04 | 5.61E-05 |
Above optical imaging system parameter is all contained in the condition formula of the content of the invention, present invention ultimately provides one kind
High definition panorama looks around imaging system has the advantages that definition is high, the angle of visual field is big, relative aperture is big, aberration is small.
Claims (9)
1. a kind of high definition panorama looks around optical imaging system, it is characterised in that be sequentially provided with from object plane to image planes (10)：
Front lens group (100), the focal power of the front lens group (100) is that negative, described front lens group (100) is saturating including first
Mirror (1), the second lens (2) and the 3rd lens (3)；The focal power of first lens (1) and second lens (2) be it is negative,
The focal power of the 3rd lens (3) is for just；
Diaphragm (9)；
Rear lens group (200), the focal power of the rear lens group (200) is for just, described rear lens group (200) is saturating including the 4th
Mirror (4), the 5th lens (5), the 6th lens (6)；The focal power of the 4th lens (4) and the 6th lens (6) for just, described the
The focal power of five lens (5) is negative；
Optical filter (7)；
Protective glass (8).
2. a kind of high definition panorama according to claim 1 looks around optical imaging system, it is characterised in that：First lens
(1) it is to be convex surface, be the meniscus lens of concave surface towards the surface of image planes (10) towards the surface of object plane；Second lens (2) are court
It is convex surface to the surface of object plane, is the meniscus lens of concave surface towards the surface of image planes (10)；Two faces of the 3rd lens (3) are
Convex surface.
3. a kind of high definition panorama according to claim 1 looks around optical imaging system, it is characterised in that：4th lens
(4) two faces are convex surface, the 5th lens (5) be towards the surface of object plane be concave surface, towards the surface of image planes (10) be convex
The meniscus lens in face, two faces of the 6th lens (6) are convex surface.
4. a kind of high definition panorama according to claim 1 looks around optical imaging system, it is characterised in that：Described front lens
Group (100), rear lens group (200) meet：
-11.2≤Fbefore≤-5.5；-13.6≤Fbefore/F≤-6.1；
2.41≤Fafter≤2.72；2.68≤Fafter/F≤3.49；
1.85≤|Fbefore/Fafter|≤4.7；
Wherein, FbeforeIt is the focal length of front lens group (100), FafterIt is the focal length of rear lens group (200), F is total for optical system
Focal length.
5. a kind of high definition panorama according to claim 4 looks around optical imaging system, it is characterised in that：Described first is saturating
Mirror (1), the refractive index of the 3rd lens (3) and the 5th lens (5) and Abbe number meet：
1.7≤Nd1≤1.9；45≤Vd1≤65；
Nd3≥1.8；Vd3≤23；
Nd5≥1.55；Vd5≤25；
Wherein, Nd1、Nd3、Nd5Respectively the first lens (1), the 3rd lens (3), the refractive index of the 5th lens (5)；Vd1、Vd3、
Vd5Respectively the first lens (1), the 3rd lens (3), the Abbe number of the 5th lens (5).
6. a kind of high definition panorama according to claim 5 looks around optical imaging system, it is characterised in that meet：
1.8≤ET2/T2≤4；
2.68≤Φ1/MIC≤3.3；
2.3≤A6/F≤3.0；
Wherein, ET2、T2The edge thickness and center thickness of respectively the second lens (2), Φ1For the bore of the first lens (1) is big
Small, MIC represents maximum imaging surface, A6It is the minimum range of the 6th lens (6) to image planes (10).
7. a kind of high definition panorama according to claim 6 looks around optical imaging system, it is characterised in that：Described optical frames
The total angle of visual field of head and camera lens overall length meet respectively：
170°≤2W≤230°；14≤TTL/F≤17.2；
In formula, 2W is the angle of visual field of camera lens, and TTL is the summit of the first lens (1) to the distance of image planes (10).
8. a kind of high definition panorama according to claim 7 looks around optical imaging system, it is characterised in that：Second lens
(2), the 4th lens (4), the 5th lens (5), the 6th lens (6) are plastic aspheric lenes, the 4th described lens (4) and
Five lens (5) are glued using plastic lens, and the cemented surface of the 4th lens (4) and the 5th lens (5) is sphere or aspheric
Face.
9. a kind of high definition panorama according to claim 8 looks around optical imaging system, it is characterised in that：Described first is saturating
Mirror (1), the 3rd lens (3) are spherical glass lens；Second lens (2), the 4th lens (4), the 5th lens (5), the 6th lens
(6) it is plastic aspheric lenes, and meets non-spherical lens formula：
In formula, parameter c is the curvature corresponding to radius, and its unit is identical with length of lens unit for radial coordinate for y, 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 α8Represent respectively each
Coefficient corresponding to radial coordinate.
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| CN109581636A (en) * | 2017-11-07 | 2019-04-05 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN109581636B (en) * | 2017-11-07 | 2024-04-26 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN107621689A (en) * | 2017-11-08 | 2018-01-23 | 广东弘景光电科技股份有限公司 | Minimize fish eye optical systems |
| CN107621689B (en) * | 2017-11-08 | 2023-04-28 | 广东弘景光电科技股份有限公司 | Miniaturized fish-eye optical system |
| CN108490583A (en) * | 2018-03-30 | 2018-09-04 | 中山联合光电科技股份有限公司 | High-pixel wide-angle camera lens |
| CN111340695A (en) * | 2020-02-10 | 2020-06-26 | 上海智幻软件科技有限公司 | Super-resolution reconstruction method of dome screen video |
| CN111352222A (en) * | 2020-05-25 | 2020-06-30 | 宁波永新光学股份有限公司 | Small high-definition vehicle-mounted wide-angle imaging system |
| CN111352222B (en) * | 2020-05-25 | 2020-08-11 | 宁波永新光学股份有限公司 | Small high-definition vehicle-mounted wide-angle imaging system |
| WO2022120813A1 (en) * | 2020-12-11 | 2022-06-16 | 欧菲光集团股份有限公司 | Optical system, image capturing module and electronic apparatus |
| CN114047613A (en) * | 2021-10-29 | 2022-02-15 | 歌尔光学科技有限公司 | Optical system and projection device |
| WO2023070811A1 (en) * | 2021-10-29 | 2023-05-04 | 歌尔光学科技有限公司 | Optical system and projection device |
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