CN101403816B - 240 degree field angle ultra-large pore diameter fish-eye lens base structure - Google Patents
240 degree field angle ultra-large pore diameter fish-eye lens base structure Download PDFInfo
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- CN101403816B CN101403816B CN2008100797494A CN200810079749A CN101403816B CN 101403816 B CN101403816 B CN 101403816B CN 2008100797494 A CN2008100797494 A CN 2008100797494A CN 200810079749 A CN200810079749 A CN 200810079749A CN 101403816 B CN101403816 B CN 101403816B
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Abstract
The invention discloses a basic structure of a fish-eye lens with a viewing angle of 240 degrees. The fish-eye lens comprises seven lens groups which are combined by ten lenses. By adopting the form of the structure, the viewing angle of the fish-eye lens which is composed of spherical surfaces is creatively raised to 240 degrees and the limiting aperture which can reach F/1.4 to the maximum extent is kept and the other performances do not be reduced. As an overlarge viewing angle, a relatively big aperture, a supersized retrofocus ratio and an excellent image fault matching are adopted, therefore, single lens reflex, super viewing angle, and approximately all airspace, maritime-space and municipal shooting and monitoring can be realized in a plurality of fields, equidistant projection and showing of images, the shape change of which can be controlled, in an IMAX dome which is appropriate to the whole globe, and clear and bright images can be ensured. Meanwhile, the structure is compact, and the disadvantage of negative thickness of the edge of the lens is successfully eliminated; the fish-eye lens is easy to be processed and extremely has practical significance.
Description
Technical field
Patent of the present invention relates to a kind of maximum can reach 240 ° of field angle ultra-large aperture fish eye lens foundation structures, is exactly specifically, uses this version can design maximum 240 ° of field angle flakes monitoring, projection, projection, photograph, photography, pick-up lens.This version has certain versatility, can satisfy with the coupling of film or the pale pinkish purple device of other photoelectricity (CCD, CMOS etc.) and use, or be used for the projection of numeral or simulating signal; Can be used to carry out photography of full visual field or shooting; Also can be used for the detection and the supervision of particular surroundings (tunnel or inner-walls of duct); Also can be used for security protection and military full spatial domain supervision.
Background technology
Fish eye lens is very special a kind of in all optical lens classifications, belongs to f θ camera lens, generally is used for 120 ° of shooting and projections to 180 ° of visual field environment, image-forming principle is " non-similar imaging ", promptly by introducing quantitatively " distortion ", produce greatly instead more than, increase camera lens visual field.Different applications, fish-eye structural parameters are different with the applied environment parameter.Last century the seventies, fish eye lens at first occurs in film industry, is used for taking and showing ball curtain (also the claiming the vault curtain) film of 35mm and 70mm film, thereby has caused the prelude that fish eye lens is widely used.
Fish eye lens in the market comprises photography (shooting), monitoring and projection lens, its field angle is all about 180 °, the relevant report of visible once in a while field angle camera lens more than 200 °, the relative aperture of its camera lens is all between D/f '=1/2.8～1/5.6 (D is that camera lens entrance pupil radius, f ' are focal length) also, and the large aperture big field angle fish eye lens reason of holding concurrently simultaneously not occurring three; The one, limited by concrete request for utilization, the 2nd, be subjected to the restriction of design difficulty and design software, the 3rd, even find ultra-large vision field cowfish glasses header structure once in a while, its optical aberration is also well optimized and is controlled, and mostly cost an arm and a leg or can't volume production, and do not have Practical significance owing to its processability of product structure difference causes.Along with the progress of the develop rapidly of science and technology, digital image processing techniques, to the raising of material deformation process ability and market to the continuous appearance of diversified camera lens demand, promoted fish eye lens is designed and developed and used.Simultaneously, along with the optical design theory constantly obtains important breakthrough, field angle is far longer than 180 ° of fish-eye optical texture aberrations controls and optimizes also becomes possibility gradually.The present invention is successfully developed by the Aided Design of design software and in conjunction with artificial mathematics interpolation analysis method, through practical application check, respond well, dependable performance on Modern Geometry optical aberration theoretical foundation.
Summary of the invention
Situation in view of prior art, the invention provides a kind of 240 ° of field angle ultra-large aperture fish eye lens foundation structures, it has under the wide-aperture prerequisite of guarantee, further relative simplified structure, promote fish-eye field angle, and, make geometrical scale reasonable by reasonably distributing focal power, be easy to processing, have good Practical significance; Simultaneously, this structure has big instead more than, characteristics that resolving power is high.
For achieving the above object, the present invention is according to the FISH EYE LENS OPTICS design theory, from the classical optics structure, reproduce by lot of data optimization and structure, successfully designed and can satisfy most applied environments, its field angle maximum can reach 240 °, the relative aperture a kind of fish eye lens version in D/f '=1/1.4～1/2.0.Fish eye lens basic structure of the present invention by seven mirror groups totally ten lens form; Described seven mirror groups are aligned in sequence with the first mirror group, the second mirror group, the 3rd mirror group, the 4th mirror group, the 5th mirror group, the 6th mirror group, the 7th mirror group; Wherein: the 4th mirror group comprises that biconvex lens and diverging meniscus lens, the 5th mirror group comprise that diverging meniscus lens and biconvex lens, the 7th mirror group comprise that biconvex lens and diverging meniscus lens are two gummed mirror groups; And the first mirror group, the second mirror group, the 6th mirror group are single mirror groups of negative curved month type; The 3rd mirror group is single mirror group of double concave type; Between biconvex lens in the first mirror group and the 6th mirror group light hurdle is set.
According to the solution of the present invention, the focal power absolute value ratio of the described first mirror group, the second mirror group, the 3rd mirror group, the 4th mirror group, the 5th mirror group, the 6th mirror group, the 7th mirror group was followed successively by 1: 3.6: 7.13: 2.26: 5.82: 2.86: 6.13.
According to the solution of the present invention, mirror group focal power is that the absolute value of the focal power ratio of positive back mirror group is 1.55: 1 for negative and focal power before the described smooth hurdle; Thereafter the face that mirror suite rate absolute value is big is a cemented surface.
According to the solution of the present invention, biconvex lens and diverging meniscus lens in diverging meniscus lens in biconvex lens in the described first mirror group, the second mirror group, the 3rd mirror group, the 4th mirror group and diverging meniscus lens, the 5th mirror group and biconvex lens, the 6th mirror group, the 7th mirror group adopt successively: crown system, barium crown system, heavy crown system, heavy crown system, dense flint system, lanthanum crown system, lanthanum crown system, barium crown system, dense flint system, barium crown system, dense flint are glass material.
According to the solution of the present invention, the photograph that this camera lens basic structure derives, shooting, monitoring, projection, its parameter area of projection fish eye lens are: 180 °～240 ° of field angle; Instead more than L '/f '=6～10; Relative aperture D/f '=1/1.4～1/16.
According to the solution of the present invention, this fish eye lens structure bi-directional scaling is applicable to the specific fish eye lens of full field angle image height diameter in 1mm～50mm scope.
In the present invention, the related first mirror group, the second mirror group are two negative meniscus lens, and its convex surface forward; The 3rd mirror group is a biconcave lens, the backward-facing that the curvature absolute value is big; The 6th mirror group is a negative meniscus lens, concave surface forward, convex surface works and reduces preposition eyeglass bore, increases system's clear aperature effect backwards.Three two the 4th mirror groups of gluing together in the mirror groups comprise that biconvex lens and diverging meniscus lens, the 5th mirror group comprise that diverging meniscus lens and biconvex lens, the 7th mirror group comprise that biconvex lens and diverging meniscus lens are then formed by biconvex lens and negative meniscus lens gummed respectively; In three two gummed groups gummed mirror group negative meniscus lens placed in the middle forward, two gummed groups are biconvex lens forward in addition.
According to characteristics of the present invention, guaranteeing that relative aperture does not reduce under the prerequisite of (being D/f '=1/1.4 to the maximum), have more than six times instead more than and have a full field angle of maximum 240 °.Can be by foundation structure of the present invention be carried out the optical focal length convergent-divergent, and a little suitably adjusts matching relationship of each main aberration, can satisfy the request for utilization of different application environment fully.This foundation structure is suitable for coloured light wavelength coverage 400nm～730nm.
In a word, the good effect that the present invention had is: the fish-eye field angle of using this version creatively will be made of (not containing aspheric surface) sphere rises to 240 °, and keeps maximum clear aperature and other performance that can reach F/1.4 not reduce.Since have the field angle of super large, bigger relative aperture, super large instead more than with good aberration coupling, can realize the shooting and the supervision of single-lens ultraphotic angle and intimate full spatial domain, marine site and region in a lot of applications, the ball curtain that also can be used for the pairing approximation whole world carries out deformation controlled image equidistant projection and projection, and guarantees the clear and beautiful of picture.Simultaneously, this compact conformation is successfully eliminated the drawback that lens edge is born thickness, is highly susceptible to processing, has Practical significance.
Description of drawings
Fig. 1 is a structural drawing of the present invention;
Fig. 2 is ray tracing of the present invention and reference diagram.
Embodiment
Below in conjunction with accompanying drawing embodiment, the invention will be further described.
According to the fish eye lens foundation structure of 240 ° of field angle shown in Figure 1, be the monitoring camera lens that present embodiment designs.Have seven mirror groups totally ten lens compositions; Described seven mirror groups are aligned in sequence with the first mirror group 1, the second mirror group 2, the 3rd mirror group 3, the 4th mirror group 4, the 5th mirror group 5, the 6th mirror group 6, the 7th mirror group 7; Wherein: the 4th mirror group 4, the 5th mirror group 5 and the 7th mirror group 7 are two gummed mirror groups; The first mirror group 1, the second mirror group 2, the 3rd mirror group 3, the 6th mirror group 6 are single mirror groups; In the present embodiment, the described first mirror group 1, the second mirror group 2 are negative meniscus lens, and convex surface works to strengthen field angle forward; The 3rd mirror group 3 is biconcave lenss, the backward-facing that the curvature absolute value is big; The 6th mirror group 6 is negative meniscus lens, concave surface forward, convex surface works and reduces preposition eyeglass bore, increases system's clear aperature effect backwards; Comprise biconvex lens 4-1 and diverging meniscus lens 4-2 in the 4th mirror group 4 of then two gummed mirror groups; Comprise diverging meniscus lens 5-1 and biconvex lens 5-2 in the 5th mirror group 5 of two gummed mirror groups; Comprise biconvex lens 7-1 and diverging meniscus lens 7-2 in the 7th mirror group 7 of two gummed mirror groups; Between lens 7-1 in the 7th mirror group 7 and the 6th mirror group 6 light hurdle A is set.In the present embodiment, the focal power absolute value ratio of the described first mirror group 1, the second mirror group 2, the 3rd mirror group 3, the 4th mirror group 4, the 5th mirror group 5, the 6th mirror group 6, the 7th mirror group 7 was followed successively by 1: 3.6: 7.13: 2.26: 5.82: 2.86: 6.13.According to application characteristic, the group focal power is that the absolute value of positive back group focal power ratio is 1.55: 1 for negative and focal power before the described smooth hurdle A; Wherein the big face of curvature absolute value of the diverging meniscus lens 7-2 in the 7th mirror group 7 is a cemented surface.The described first mirror group 1, the second mirror group 2, the 3rd mirror group 3, the 4th mirror group 4, the 5th mirror group 5, the 6th mirror group 6, the 7th mirror group 7 adopt successively: crown is, heavy crown is, heavy crown is, dense flint is and lanthanum crown system (gummed), lanthanum crown are and barium crown system (gummed), dense flint are, the barium crown is and dense flint system (gummed) glass material.In the application of present embodiment, this camera lens fundamental performance parameter is: 240 ° of field angle; Instead more than L '/f '=6.6; Relative aperture D/f '=1/1.4～1/16 adapts to the use of 1/3rd inch CCDs or cmos device, and the optics back work distance is from being 8.6mm, and focal length is 1.3mm, and half image height is 1.8mm.
In addition, but this fish eye lens structure bi-directional scaling and be suitable for the CCD or the cmos device of other size, for example 1/4th, 1/2nd, 2/3rds and even one inches, at this moment, focal length and image height are corresponding to synchronous convergent-divergent, the also corresponding bi-directional scaling of the physical dimension of camera lens itself.
Also have, if with camera lens coupling be LCD, the cmos device of cinefilm or digital projector, also to adjust the image height of camera lens, remove to satisfy the picture dimension of film or LCD, CMOS, at this moment, the scope of half field-of-view's image height size is 6mm～25mm, back work distance that note to adjust camera lens simultaneously from, make it to satisfy machinery needs be installed.The camera lens of this kind purposes instead more than being 7～8, than the camera lens of monitoring or photographic uses instead more than bigger.
240 ° of monitoring fish eye lenses that are used for 1/3 inch target surface colored CCD of a field angle that designs according to the present invention, this camera lens basic parameter is as follows: focal distance f '=1.3mm; Relative aperture: D/f '=1/1.4; Full field angle: 2 ω=240 °; Its optics rear cut-off distance: L '=8.6mm; Lens optical total length: L=60.84mm; The maximum eyeglass bore of camera lens Φ 56mm.The aberration good match of this structure, form are simple, and all optical mirror slips are the standard sphere, and the optical glass material that adopts all is the standard common material, and maximum eyeglass bore and eyeglass minimum edge edge thickness all have good manufacturability.Correction through simple performance parameter on this version basis just can be used for different application scenarios, comprises taking analog-and digital-image, projection and viewing ball curtain picture, the detection of no blind spot and monitoring the key area.
Fig. 2 has provided the ray tracing reference diagram of fish eye lens foundation structure, and present embodiment is the monitoring fish eye lens that is designed to, and is applicable to 1/3 inch target surface colored CCD, Aperture Range F/1.4-F/8; Light and optical axis included angle are 60 ° under the edge incident.
Claims (4)
1. the fish eye lens basic structure with 240 ° of field angle is characterized in that, fish eye lens basic structure by seven mirror groups totally ten lens form; Described seven mirror groups are aligned in sequence with the first mirror group (1), the second mirror group (2), the 3rd mirror group (3), the 4th mirror group (4), the 5th mirror group (5), the 6th mirror group (6), the 7th mirror group (7); Wherein: the 4th mirror group (4) comprises that biconvex lens (4-1) and diverging meniscus lens (4-2), the 5th mirror group (5) comprise that diverging meniscus lens (5-1) and biconvex lens (5-2), the 7th mirror group 7 comprise that biconvex lens (7-1) and diverging meniscus lens (7-2) are two gummed mirror groups; And the first mirror group (1), the second mirror group (2), the 6th mirror group (6) are single mirror groups of negative curved month type; The 3rd mirror group (3) is single mirror group of double concave type; Be arranged between the biconvex lens (7-1) of the first mirror group (7) and the 6th mirror group (6) light hurdle A is set; The focal power absolute value ratio of the described first mirror group (1), the second mirror group (2), the 3rd mirror group (3), the 4th mirror group (4), the 5th mirror group (5), the 6th mirror group (6), the 7th mirror group (7) was followed successively by 1: 3.6: 7.13: 2.26: 5.82: 2.86: 6.13; Described smooth hurdle (A) preceding mirror group focal power is that the absolute value of the focal power ratio of positive back mirror group is 1.55: 1 for negative and focal power.
2. press the fish eye lens basic structure of the described 240 ° of field angle of claim 1, it is characterized in that the described first mirror group (1), the second mirror group (2), the 3rd mirror group (3), biconvex lens (4-1) in the 4th mirror group (4) and diverging meniscus lens (4-2), diverging meniscus lens (5-1) in the 5th mirror group (5) and biconvex lens (5-2), the 6th mirror group (6), biconvex lens (7-1) and diverging meniscus lens (7-2) in the 7th mirror group (7) adopt successively: crown system or barium crown system, heavy crown is, heavy crown is, dense flint system, lanthanum crown system, lanthanum crown system, barium crown system, dense flint system, barium crown system, dense flint is a glass material.
3. by the fish eye lens basic structure of the described 240 ° of field angle of claim 1, it is characterized in that the photograph that this camera lens basic structure derives, shooting, monitoring, projection, its parameter area of projection fish eye lens are: 180 °～240 ° of field angle; Instead more than L '/f '=6～10; Relative aperture D/f '=1/1.4～1/16.
4. by the fish eye lens basic structure of the described 240 ° of field angle of claim 1, it is characterized in that this fish eye lens structure bi-directional scaling is applicable to the specific fish eye lens of full field angle image height diameter in 1mm～50mm scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008100797494A CN101403816B (en) | 2008-11-07 | 2008-11-07 | 240 degree field angle ultra-large pore diameter fish-eye lens base structure |
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| CN2008100797494A CN101403816B (en) | 2008-11-07 | 2008-11-07 | 240 degree field angle ultra-large pore diameter fish-eye lens base structure |
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| CN101403816A CN101403816A (en) | 2009-04-08 |
| CN101403816B true CN101403816B (en) | 2010-04-14 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778739B (en) * | 2012-07-09 | 2014-05-21 | 秦皇岛视听机械研究所 | Zoom projection fish-eye lens generally used for digital projector |
| CN103246047B (en) * | 2013-05-27 | 2015-06-03 | 秦皇岛视听机械研究所 | Large-field angle low-projection ratio digital projector lens |
| CN104656227B (en) * | 2015-02-27 | 2017-03-08 | 福建福光股份有限公司 | High-resolution, low distortion day and night tight shot |
| CN106488099A (en) * | 2016-10-19 | 2017-03-08 | 深圳市麦极客图像技术有限公司 | Device, equipment and the VR video recording/reproducing system record, watched VR video |
| CN107589617B (en) * | 2017-09-29 | 2020-10-20 | 维沃移动通信有限公司 | Camera and mobile terminal |
| CN112433342B (en) * | 2020-12-03 | 2022-05-03 | 四川长虹电器股份有限公司 | Ultra-high resolution miniature projection lens |
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| US3850509A (en) * | 1971-12-07 | 1974-11-26 | Olympus Optical Co | Fisheye lens system |
| US4256373A (en) * | 1977-08-17 | 1981-03-17 | Minolta Camera Kabushiki Kaisha | Fish eye lens system |
| US4412726A (en) * | 1980-01-17 | 1983-11-01 | Minolta Camera Kabushiki Kaisha | Fish eye lens system |
| CN2840087Y (en) * | 2005-12-03 | 2006-11-22 | 秦皇岛视听机械研究所 | A kind of fish eye lens of showing spherical screen stereoscopic film |
| CN101131462A (en) * | 2007-09-20 | 2008-02-27 | 秦皇岛视听机械研究所 | General pearl eye projection lens with variable parameters of digital projector |
| CN101196608A (en) * | 2007-11-23 | 2008-06-11 | 秦皇岛视听机械研究所 | Ultra-large field angle fisheye lens structure used for complete spherical dome-screen projection of digital projector |
| CN101266330A (en) * | 2008-04-23 | 2008-09-17 | 秦皇岛视听机械研究所 | 320 degree vision field angle fish eye lens structure |
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2008
- 2008-11-07 CN CN2008100797494A patent/CN101403816B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3850509A (en) * | 1971-12-07 | 1974-11-26 | Olympus Optical Co | Fisheye lens system |
| US4256373A (en) * | 1977-08-17 | 1981-03-17 | Minolta Camera Kabushiki Kaisha | Fish eye lens system |
| US4412726A (en) * | 1980-01-17 | 1983-11-01 | Minolta Camera Kabushiki Kaisha | Fish eye lens system |
| CN2840087Y (en) * | 2005-12-03 | 2006-11-22 | 秦皇岛视听机械研究所 | A kind of fish eye lens of showing spherical screen stereoscopic film |
| CN101131462A (en) * | 2007-09-20 | 2008-02-27 | 秦皇岛视听机械研究所 | General pearl eye projection lens with variable parameters of digital projector |
| CN101196608A (en) * | 2007-11-23 | 2008-06-11 | 秦皇岛视听机械研究所 | Ultra-large field angle fisheye lens structure used for complete spherical dome-screen projection of digital projector |
| CN101266330A (en) * | 2008-04-23 | 2008-09-17 | 秦皇岛视听机械研究所 | 320 degree vision field angle fish eye lens structure |
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