CN105700117B - A kind of optical imaging system - Google Patents
A kind of optical imaging system Download PDFInfo
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- CN105700117B CN105700117B CN201610265287.XA CN201610265287A CN105700117B CN 105700117 B CN105700117 B CN 105700117B CN 201610265287 A CN201610265287 A CN 201610265287A CN 105700117 B CN105700117 B CN 105700117B
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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
- G02B13/001—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
- G02B13/0045—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 five or more lenses
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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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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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
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Abstract
The invention discloses a kind of optical imaging system, including：First lens, the first lens are negative lens, and the two sides of the first lens is respectively that hyperbola is aspherical and ellipse is aspherical；Second lens, the second lens are positive lens, and the two sides of the second lens is spherical surface；3rd lens, the 3rd lens are negative lens, and the 3rd lens are biconcave lens；4th lens, the 4th lens are positive lens, and the 4th lens are biconvex lens；Diaphragm；5th lens, the 5th lens are negative lens, and the 5th lens are biconcave lens；6th lens, the 6th lens are positive lens, and the 6th lens are biconvex lens；7th lens, the 7th lens are positive lens, and the two sides of the 7th lens is respectively that oblate aspherical and hyperbola is aspherical；8th lens, the 8th lens are positive lens, and the two sides of the 8th lens is that hyperbola is aspherical.Visual field of the present invention is big, image quality is high, high resolution.
Description
【Technical field】
The present invention relates to a kind of optical imaging systems.
【Background technology】
With design level, manufacture the raising of processing technology, digital camera also constantly towards small, light-weight and
High performance direction is developed.For the micro- 4/3 system camera lens of digital camera currently on the market there are some drawbacks, most volume is big, regards
Field is small, surrounding visual field resolution ratio is low, it is few to obtain information content, and distortion is also corresponding larger to aberration, and shooting picture cannot be authentic and valid
Real scene is presented in ground.
Therefore, the present invention is exactly and is directed to more than the deficiencies in the prior art and researchs and proposes.
【The content of the invention】
The present invention seeks to overcome the deficiencies in the prior art, provide a kind of high picture high image quality optical imaging system, it should
8 lens of optical imaging system are combined using spherical lens with non-spherical lens, realize big visual field, high image quality, high-resolution
Rate, large aperture imaging, and so that entire optical imaging system is compact-sized, avoid the ball generated using whole spheric glasses
Surface aberration.The optical imaging system is suitable for shooting of micro- one camera to photographic works such as portrait, landscape and humane essays, may be used also
For fields such as unmanned planes, so as to effectively improve the broadness of the optical imaging system application range.
The present invention is achieved by the following technical solutions：
A kind of optical imaging system, it is characterised in that：It is equipped with successively from object side to image side：
First lens 1, first lens 1 are negative lens, and the one side of first lens 1 towards the object side is
Hyperbola is aspherical, one side towards image side is aspherical for ellipse；
Second lens 2, second lens 2 be positive lens, and second lens 2 towards object side one side and
What it is towards image side is spherical surface on one side；
3rd lens 3, the 3rd lens 3 are negative lens, and the 3rd lens 3 are biconcave lens；
4th lens 4, the 4th lens 4 are positive lens, and the 4th lens 4 are biconvex lens；
Diaphragm 11；
5th lens 5, the 5th lens 5 are negative lens, and the 5th lens 5 are biconcave lens；
6th lens 6, the 6th lens 6 are positive lens, and the 6th lens 6 are biconvex lens；
7th lens 7, the 7th lens 7 are positive lens, and the one side of the 7th lens 7 towards the object side is
Oblate aspherical, the one side towards image side is aspherical for hyperbola；
8th lens 8, the 8th lens 8 are positive lens, and the 8th lens 8 are towards object side and image side
Surface is that hyperbola is aspherical；
Optical filter 9；
Sensitive chip 10.
Optical imaging system as described above, it is characterised in that：First lens 1, the second lens 2, the 3rd lens
3rd, the focal length of the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7 and the 8th lens 8 is respectively f1、f2、f3、f4、f5、
f6、f7And f8, and meet following expression formula：-4<f1/f2<0, -4<f3/f4<- 1, -4<f5/f6<0,0<f7/f8<8；Described
First lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7 and the 8th are saturating
The abbe number of mirror 8 is respectively vd1、vd2、vd3、vd4、vd5、vd6、vd7And vd8, and meet following expression formula：vd1＞
45, vd4＞ 45, vd6＞ 45, vd8＞ 45, vd2＜ 40, vd3＜ 40, vd5＜ 40, vd740,40 ＜ (vd of ＜1-vd2) ＜ 55,45
＜ (vd8-vd7) ＜ 60.
Optical imaging system as described above, it is characterised in that：The refractive index nd of first lens 11Meet as follows
Expression formula：1.4<nd1<1.7；The abbe number vd of first lens 11Meet following expression：70<vd1<95。
Optical imaging system as described above, it is characterised in that：The refractive index nd of second lens 22Meet as follows
Expression formula：1.7<nd2<2.0, the abbe number vd of second lens 22Meet following expression：19<vd2<35。
Optical imaging system as described above, it is characterised in that：3rd lens 3 and the 4th lens 4 are bonded in one
It rises and forms balsaming lens, and the refractive index nd of the 3rd lens 33With abbe number vd3Meet following expression respectively：
1.5<nd3<1.8,25<vd3<40；The refractive index nd of 4th lens 44With abbe number vd4Meet respectively and be expressed as below
Formula：1.5<nd4<1.8,45<vd4<60。
Optical imaging system as described above, it is characterised in that：5th lens 5 and the 6th lens 6 are bonded in one
It rises and forms balsaming lens, and the refractive index nd of the 5th lens 55With abbe number vd5Meet following expression respectively：
1.5<nd5<1.8,20<vd5<35；The refractive index nd of 6th lens 66With abbe number vd6Meet respectively and be expressed as below
Formula：1.5<nd6<1.8,45<vd6<60。
Optical imaging system as described above, it is characterised in that：The refractive index nd of 7th lens 77Meet as follows
Expression formula：1.9<nd7<2.2；The abbe number vd of 7th lens 77Meet following expression：15<vd7<30。
Optical imaging system as described above, it is characterised in that：The refractive index nd of 8th lens 88Meet as follows
Expression formula：1.5<nd8<1.8；The abbe number vd of 8th lens 88Meet following expression：70<vd8<90。
Optical imaging system as described above, it is characterised in that：Second lens 2, the 3rd lens 3, the 4th lens 4,
5th lens 5, the 6th lens 6 are spherical lens, the aspherical table of first lens 1, the 7th lens 7 and the 8th lens 8
Face shape meets equation：In formula
In, 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 the secondary song of circular cone
Linear system number；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1, the face shape curve of lens
For parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0, the face of lens
Shape curve is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；α1To α8Asphericity coefficient is represented respectively.
Compared with prior art, the present invention has the following advantages：
1st, image planes imagewise uniform of the invention, brightness height, aperture are big (F-number reaches F2.4).
2nd, the present invention uses two groups of cemented doublets so that the color of optical imaging system is clearly demarcated, color reducibility and picture
Face is Well-recovered.
3rd, the first lens, the 7th lens and the 8th lens of the invention use aspheric surface, are conducive to the school of aberration
Just, reduce aberration and the distortion of system, improve the image quality of entire visual field so that the resolution ratio of the optical imaging system, thoroughly
Cross rate, color reducibility is significantly improved, high resolution reach 16M (16,000,000 pixel).
4th, the present invention each lens reasonable disposition combination, solve be difficult to realize under big visual field, high picture high-resolution and
The problem of low distortion, while there is the structure and shape of miniaturization and lightness, it can make in the case where overall length only has 45mm complete
Image height reaches 21.6mm.
5th, field of view angle of the invention reaches 84 degree, and for temperature drift scope in -20 DEG C~80 DEG C, performance is sufficiently stable
And substantially without focusing again.
6th, distortion of the present invention under full filed is 9%, aberration control in smaller scope, meet digital camera with
The requirement taken photo by plane to distortion.
【Description of the drawings】
Fig. 1 is schematic diagram of the present invention；
Fig. 2 is light path schematic diagram of the present invention.
【Specific embodiment】
The invention will be further described below in conjunction with the accompanying drawings：
A kind of optical imaging system is equipped with successively from object side to image side：
First lens 1, first lens 1 are negative lens, and the one side of first lens 1 towards the object side is
Hyperbola is aspherical, one side towards image side is aspherical for ellipse；
Second lens 2, second lens 2 be positive lens, and second lens 2 towards object side one side and
What it is towards image side is spherical surface on one side；
3rd lens 3, the 3rd lens 3 are negative lens, and the 3rd lens 3 are biconcave lens；
4th lens 4, the 4th lens 4 are positive lens, and the 4th lens 4 are biconvex lens；
Diaphragm 11；
5th lens 5, the 5th lens 5 are negative lens, and the 5th lens 5 are biconcave lens；
6th lens 6, the 6th lens 6 are positive lens, and the 6th lens 6 are biconvex lens；
7th lens 7, the 7th lens 7 are positive lens, and the one side of the 7th lens 7 towards the object side is
Oblate aspherical, the one side towards image side is aspherical for hyperbola；
8th lens 8, the 8th lens 8 are positive lens, and the 8th lens 8 are towards object side and image side
Surface is that hyperbola is aspherical；
Optical filter 9；
Sensitive chip 10.
First lens 1 are negative meniscus, can correct astigmatism bending and central aberration, and the 6th lens the 6, the 7th are thoroughly
This three pieces of positive lens of mirror 7, the 8th lens 8 so that the image space main face forward shift of optical system, so as to greatly shorten optical imaging system
Length, and the second lens 2 and the 4th lens 4 are positive lens, and the 3rd lens 3 and the 5th lens 5 are negative lens, these are positive and negative
Lens have been implemented in combination with big visual field, high picture, high image quality, large aperture imaging, can be used for micro- one camera and unmanned plane
The fields of grade.In practice, using optical imaging system of the present invention camera lens can the camera lens using be inverted dolly-out, dolly-back type design, that is, adopt
With anti-structure of looking in the distance, F-number reaches F2.4, for example, the micro- 4/3 system camera lens of the digital camera of 12mm F2.4.
Optical filter 9 is equipped in the one side of the 8th lens 8 towards image side, not only has one to imaging CMOS sensitive chips
Fixed protective effect, while a part of light can also be filtered during lens imaging to reduce veiling glare, so as to keep mirror
While head imaging clearly, the sharpness of image and the reproducibility of color are promoted.4th lens 4 and the 5th lens 5 it
Between be equipped with diaphragm 11, therefore can directly using aperture perforate size control light-inletting quantity so that imaging picture it is integrally uniform, bright
Degree is high.
First lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6,
The focal length of seven lens 7 and the 8th lens 8 is respectively f1、f2、f3、f4、f5、f6、f7And f8, and meet following expression formula：-4<
f1/f2<0, -4<f3/f4<- 1, -4<f5/f6<0,0<f7/f8<8；First lens 1, the second lens 2, the 3rd lens 3,
Four lens 4, the 5th lens 5, the 6th lens 6, the abbe number of the 7th lens 7 and the 8th lens 8 are respectively vd1、vd2、vd3、
vd4、vd5、vd6、vd7And vd8, and meet following expression formula：vd1＞ 45, vd4＞ 45, vd6＞ 45, vd8＞ 45, vd2＜
40, vd3＜ 40, vd5＜ 40, vd740,40 ＜ (vd of ＜1-vd2) 55,45 ＜ (vd of ＜8-vd7) ＜ 60.
The refractive index nd of first lens 11Meet following expression：1.4<nd1<1.7；First lens 1
Abbe number vd1Meet following expression：70<vd1<95.The material of first lens 1 uses optical glass, and its refractive index
nd1With abbe number vd1Meet above-mentioned expression formula, object side angle of incidence of light can be controlled well and reduce image deformation, so as to
It realizes big visual field, high picture, high image quality, improves the optical property of optical imaging system.
The refractive index nd of second lens 22Meet following expression：1.7<nd2<2.0, second lens 2
Abbe number vd2Meet following expression：19<vd2<35.The material of second lens 2 uses optical glass, and its refractive index
nd2With abbe number vd2Meet above-mentioned expression formula, change in refraction angle of the light between each lens can be controlled well, carried
The optical property of high optical imaging system.
3rd lens 3 and the 4th lens 4 are adhesively-bonded together to form balsaming lens, and the 3rd lens 3
Refractive index nd3With abbe number vd3Meet following expression respectively：1.5<nd3<1.8,25<vd3<40；Described the 4th is thoroughly
The refractive index nd of mirror 44With abbe number vd4Meet following expression respectively：1.5<nd4<1.8,45<vd4<60.3rd lens 3
Material with the 4th lens 4 is using glass material, the refractive index nd of the 3rd lens 33With abbe number vd3And the 4th lens 4 folding
Penetrate rate nd4With abbe number vd4Several expression formulas more than meeting respectively, so as to the axial chromatic aberration generated to optical imaging system
It is compensated well, the image quality of optical imaging system is made to be significantly improved.
5th lens 5 and the 6th lens 6 are adhesively-bonded together to form balsaming lens, and the 5th lens 5
Refractive index nd5With abbe number vd5Meet following expression respectively：1.5<nd5<1.8,20<vd5<35；Described the 6th is thoroughly
The refractive index nd of mirror 66With abbe number vd6Meet following expression respectively：1.5<nd6<1.8,45<vd6<60.5th lens 5
Material with the 6th lens 6 is using glass material, the refractive index nd of the 5th lens 55With abbe number vd5And the 6th lens 6 folding
Penetrate rate nd6With abbe number vd6Several expression formulas more than meeting respectively, so as to the axial chromatic aberration generated to optical imaging system
It is compensated well, the image quality of optical imaging system is made to be significantly improved
The refractive index nd of 7th lens 77Meet following expression：1.9<nd7<2.2；7th lens 7
Abbe number vd7Meet following expression：15<vd7<30.The material of 7th lens 7 uses optical glass, and described the
The refractive index nd of seven lens 77With abbe number vd7Meet above-mentioned expression formula, distortion can be reduced well and increasing light is in image planes
On height of incidence, improve the illumination of peripheral field, the optical transfer function of optical imaging system improved, so as to promote image quality.
The refractive index nd of 8th lens 88Meet following expression：1.5<nd8<1.8；8th lens 8
Abbe number vd8Meet following expression：70<vd8<90.The material of 8th lens 8 uses optical glass, and described the
The refractive index nd of eight lens 88With abbe number vd8Meet above-mentioned expression formula, image planes chief ray incidence angles can be reduced, reduced into
As aberration.
Second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6 are spherical lens, institute
The aspherical surface shape for stating the first lens 1, the 7th lens 7 and the 8th lens 8 meets equation： In formula, parameter c is half
Curvature corresponding to footpath, y are radial coordinate, and unit is identical with length of lens unit, and k is circular cone whose conic coefficient；When k systems
When number is less than -1, the face shape curve of lens is hyperbola, and when k-factor is equal to -1, the face shape curve of lens is parabola；Work as k
When coefficient is between -1 to 0, the face shape curve of lens is ellipse, and when k-factor is equal to 0, the face shape curve of lens is circle,
When k-factor is more than 0, the face shape curve of lens is oblateness；α1To α8Asphericity coefficient is represented respectively.
Optical imaging system of the present invention is made of three pieces Glass aspheric and five sheet glass spherical lenses, can be applied to count
Small, image quality is high, picture the is big optical imaging lens of micro- 4/3 system of code camera, unmanned plane etc..
Claims (2)
1. a kind of optical imaging system, it is characterised in that：It is equipped with successively from object side to image side：
First lens (1), first lens (1) are negative lens, and first lens (1) are towards the one side of object side
For hyperbola it is aspherical, towards image side be on one side ellipse it is aspherical；
Second lens (2), second lens (2) are positive lens, and second lens (2) are towards the one side of object side
With towards image side be spherical surface on one side；
3rd lens (3), the 3rd lens (3) are negative lens, and the 3rd lens (3) are biconcave lens；
4th lens (4), the 4th lens (4) are positive lens, and the 4th lens (4) are biconvex lens；
Diaphragm (11)；
5th lens (5), the 5th lens (5) are negative lens, and the 5th lens (5) are biconcave lens；
6th lens (6), the 6th lens (6) are positive lens, and the 6th lens (6) are biconvex lens；
7th lens (7), the 7th lens (7) are positive lens, and the 7th lens (7) are towards the one side of object side
To be oblate aspherical, the one side towards image side is aspherical for hyperbola；
8th lens (8), the 8th lens (8) are positive lens, and the 8th lens (8) are towards object side and image side
Surface be that hyperbola is aspherical；
Optical filter (9)；
Sensitive chip (10)；
Also, first lens (1), the second lens (2), the 3rd lens (3), the 4th lens (4), the 5th lens (5),
The focal length of six lens (6), the 7th lens (7) and the 8th lens (8) is respectively f1、f2、f3、f4、f5、f6、f7And f8, and meet
Following expression formula：-4<f1/f2<0, -4<f3/f4<- 1, -4<f5/f6<0,0<f7/f8<8；First lens (1), second
Lens (2), the 3rd lens (3), the 4th lens (4), the 5th lens (5), the 6th lens (6), the 7th lens (7) and the 8th lens
(8) abbe number is respectively vd1、vd2、vd3、vd4、vd5、vd6、vd7And vd8, and meet following expression formula：40 ＜
(vd1-vd2) 55,45 ＜ (vd of ＜8-vd7) ＜ 60；
The refractive index nd of first lens (1)1Meet following expression：1.4<nd1<1.7；First lens (1)
Abbe number vd1Meet following expression：70<vd1<95；
The refractive index nd of second lens (2)2Meet following expression：1.7<nd2<2.0, second lens (2)
Abbe number vd2Meet following expression：19<vd2<35；
3rd lens (3) and the 4th lens (4) are adhesively-bonded together to form balsaming lens, and the 3rd lens
(3) refractive index nd3With abbe number vd3Meet following expression respectively：1.5<nd3<1.8,25<vd3<40；Described the 4th
The refractive index nd of lens (4)4With abbe number vd4Meet following expression respectively：1.5<nd4<1.8,45<vd4<60；
5th lens (5) and the 6th lens (6) are adhesively-bonded together to form balsaming lens, and the 5th lens
(5) refractive index nd5With abbe number vd5Meet following expression respectively：1.5<nd5<1.8,20<vd5<35；Described the 6th
The refractive index nd of lens (6)6With abbe number vd6Meet following expression respectively：1.5<nd6<1.8,45<vd6<60；
The refractive index nd of 7th lens (7)7Meet following expression：1.9<nd7<2.2；7th lens (7)
Abbe number vd7Meet following expression：15<vd7<30；
The refractive index nd of 8th lens (8)8Meet following expression：1.5<nd8<1.8；8th lens (8)
Abbe number vd8Meet following expression：70<vd8<90。
2. optical imaging system according to claim 1, it is characterised in that：Second lens (2), the 3rd lens (3),
4th lens (4), the 5th lens (5), the 6th lens (6) are spherical lens, first lens (1), the 7th lens (7) and
The aspherical surface shape of 8th lens (8) meets equation： In formula, parameter c is the curvature corresponding to radius, and y is radial coordinate,
Its 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, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face of lens
Shape curve 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 of lens is bent
Line is oblateness；α1To α8Asphericity coefficient is represented respectively.
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| TWI638202B (en) * | 2017-05-15 | 2018-10-11 | 先進光電科技股份有限公司 | Optical image capturing system |
| CN108227146B (en) | 2017-12-29 | 2020-02-11 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN108333724B (en) * | 2018-05-08 | 2020-03-31 | 嘉兴中润光学科技有限公司 | Fixed focus lens |
| CN108919467B (en) * | 2018-09-21 | 2023-06-13 | 广东奥普特科技股份有限公司 | Lens device capable of performing multi-view shooting |
| CN109212750B (en) * | 2018-10-11 | 2023-08-08 | 佛山科学技术学院 | Long-focus athermalized star sensor optical system |
| CN111638587B (en) * | 2020-05-08 | 2022-06-21 | 成都优视光电技术有限公司 | Large-aperture high-pixel panoramic optical system |
| CN111736311B (en) * | 2020-07-27 | 2020-11-13 | 常州市瑞泰光电有限公司 | Image pickup optical lens |
| CN115248496B (en) * | 2022-09-23 | 2022-12-16 | 浙江大华技术股份有限公司 | High-definition optical lens and high-performance laser radar |
| CN115494624B (en) * | 2022-11-16 | 2023-04-07 | 江西联创电子有限公司 | Optical lens |
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| US6268964B1 (en) * | 1998-06-26 | 2001-07-31 | Asahi Kogaku Kogyo Kabushiki Kaisha | Step zoom lens |
| JP2001221955A (en) * | 2000-02-10 | 2001-08-17 | Nikon Corp | Objective lens for parallel stereomicroscope |
| CN104169774A (en) * | 2012-03-16 | 2014-11-26 | 株式会社尼康 | Optical system, optical device and method for manufacturing optical system |
| CN203275751U (en) * | 2013-05-10 | 2013-11-06 | 中山联合光电科技有限公司 | High definition resolution and 210 degree super large wide angle optical system capable of being used day and night |
| CN104330872A (en) * | 2014-10-27 | 2015-02-04 | 东莞市明镜光学有限公司 | Large-aperture ultra-wide-angle optical lens |
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