CN104597584B - Rearmounted aperture diaphragm high definition flake video camera lens - Google Patents
Rearmounted aperture diaphragm high definition flake video camera lens Download PDFInfo
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- CN104597584B CN104597584B CN201410852586.4A CN201410852586A CN104597584B CN 104597584 B CN104597584 B CN 104597584B CN 201410852586 A CN201410852586 A CN 201410852586A CN 104597584 B CN104597584 B CN 104597584B
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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
- G02B13/001—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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Abstract
The present invention relates to a kind of rearmounted aperture diaphragm high definition flake video camera lens, including front lens group A, relaying field lens B, rear microscope group C and the aperture diaphragm set gradually along light incident direction；Front lens group A is short focus negative power microscope group；Microscope group C is positive light coke microscope group afterwards；Optical system meets following condition：0≤lp’‑lf’<0.15；17<fIn’<18,3<MIn<8.1；0.13<|hp1/fA’|<0.17；1.70<n1<1.75,52<v1<57；1.70<n8<1.74,28<v8<35；1.52<n9<1.57,58<v9<65.The angle of view is better than 1 up to 180 degree, relative aperture D/f ':1.8th, full filed mtf value can meet various particular surroundings requirements more than 0.3 in the case of 200lp/mm.
Description
Technical field
The present invention relates to optical camera lens device, it is a kind of rearmounted aperture diaphragm high definition flake video camera lens, is applicable
In security protection video monitoring fields such as square, bulk storage plant, market, large-scale public transport, elevators, after being particularly well-suited to automobile
Put back-up video display observation occasion.
Background technology
As high speed car industry is developed rapidly, the accident day that traffic occurs is more serious.Therefore, the relatively advanced state of traffic
Family, in addition to developing the additional rearview mirror of off-axis, is additionally arranged the backsight video of anticollision front-view mirror and reversing with intelligent function
Monitoring system, with avoid it is artificial knock into the back, the security incident such as topple.The pick-up lens of the configuration of these video monitoring systems,
The angle of visual field up to 180 ° is sought, relative aperture is more than 1:2, definition is improved from conventional SD to high definition, and the optical length of camera lens is not
Can exceed that the small form factor requirements such as 30mm.The characteristics of this pick-up lens is to allow relative distortion especially big, even up to 100%.
Requirement of the automobile industry to environment is particularly severe, it is desirable to adapt to high temperature extremely hot (more than 80 DEG C), low temperature it is cruel it is cold (- 40 DEG C with
Under), the environment of hot humid can be born and there is waterproof function, it is resistant to shock and vibration of high intensity etc..This kind of video camera mirror
Head applies other field in security protection, therefore it is required that processing technology it is good, cost performance economic requirement high.
The content of the invention
It is an object of the invention to pass through new optical camera lens device, there is provided the angle of visual field reaches 180 degree, relative aperture D/f '
Better than 1:1.8th, full filed mtf value and possesses and meets the small-sized of various particular surroundings requirement more than 0.3 in the case of 200lp/mm
Change cost performance rearmounted aperture diaphragm high definition flake video camera lens high.
The technical scheme is that so constitute：
A kind of rearmounted aperture diaphragm high definition flake video camera lens, it is characterised in that：It is included along light incident direction
Front lens group A, relaying field lens B, rear microscope group C and the aperture diaphragm for setting gradually；
The front lens group A constitutes short focus negative power by the first lens, the second lens, the 3rd lens and the 4th lens
Microscope group, this four lens are respectively convex-concave negative lens, double-concave negative lens, biconvex positive lens and concavo-convex positive lens, its combined focal length
Represented with fA ', wherein the 3rd lens and the 4th lens group are into double agglutination lens group；
The relaying field lens B is made up of the 5th lens, and the 5th lens are monolithic biconvex positive lens, with fIn' represent its
Focal length value；
The rear microscope group C is made up of the microscope group of positive light coke the 6th lens, the 7th lens, the 8th lens and the 9th lens,
This four lens are respectively biconvex positive lens, biconvex positive lens, double-concave negative lens, biconvex positive lens；Wherein the 7th lens, the 8th
Lens and the 9th lens constitute three balsaming lens groups；
The aperture diaphragm is placed in behind the 9th lens, with lp' represent it and the distance between camera lens image planes；With lf' represent light
The rear focal length of system；With 2hp1Represent the entrance pupil size of optical system；
Above-mentioned optical system must meet following condition：
0≤|lp′-lf′|<0.15……
17<fIn′<18,3<MIn<8.1……
0.13<|hp1/fA′|<0.17……
1.70<n1<1.75,v1=50.351963 ...
Wherein, MInRepresent " relaying " thing for undertaking of relaying field lens B and the enlargement ratio of picture, n1And v1First is represented respectively
The refractive index and Abbe number of lens, n8And v8The refractive index and Abbe number of the 8th lens, n are represented respectively9And v9Represent respectively
The refractive index and Abbe number of the 9th lens.
Additionally, above-mentioned technical proposal of the present invention still further improve it is as follows：The rearmounted aperture diaphragm high definition flake video
Pick-up lens also includes the field stop being arranged between relaying field lens B and rear microscope group C, and the position of the field stop is selected in light
The height of light beam is less than other to be cut Intermediate View off field under aperture light beam and the rim ray cut through by front lens group A on axle
The position of light beam.
The rearmounted aperture diaphragm high definition flake video camera lens also include being arranged at aperture diaphragm and camera lens image planes it
Between protective glass, the protective glass be parallel flat eyeglass.
All lens use full spherical lens, and the absolute value of front and rear two radius surface of multi-disc lens is identical.Wherein 6
The absolute value of front and rear two radius surface of lens is identical.
Operation principle of the present invention is described as follows：
First：Rearmounted aperture diaphragm high definition flake video camera lens of the present invention include front lens group A, relaying field lens
Several parts such as B and rear microscope group C.Front lens group A is a short focus negative power microscope group, and its effect is outside the axle ultra-wide angle
The angle of visual field is progressively reduced to the rear group of wide-angular field angle that can be undertaken.The very big angle of visual field is undertaken due to preceding group, therefore is selected in structure
Light beam has been taken on axle by the drift angle in each face a little bit smaller scheme (Δ ui'=ui′-ui<0.15) -- (wherein, uiIt is each lens
The angle of emergence on surface, ui' be each lens surface the angle of emergence, Δ ui' be each lens respective surfaces incidence angle and the angle of emergence
Deviation), to reduce the senior amount of aberration on axle.So, aberration can just be put down on the remaining axle by front lens group A with primary aberration
Weighing apparatus.At the same time, also making can be close proximity to the centre of sphere in each face or the incidence angle control for making it into after the axle outer light beam refraction per face
Make below 40 °, to reduce the outer senior aberration of its issuable axle.The effect of relaying field lens B, on the one hand playing makes front lens group
The entrance pupil of the emergent pupil of A and rear group realizes " pupil pupil " effect of connecting, and reduces the light bar spherical aberration of system, and have compressed into rear microscope group
The beam angle of C, on the other hand allows it to produce a certain amount of positive primary spherical aberration and spherochromatism to go balance front lens group A to produce remaining
Negative primary spherical aberration and spherochromatism.Due to front lens group A into " virtual image " " thing " of B (relaying field lens) be in preceding Jiao of relaying field lens B
In point (near), make relaying field lens B into " virtual image " image distance elongate, the angular aperture of light beam on the axle that microscope group C undertakes after reduction.
Afterwards microscope group C play through front lens group A and relaying field lens B into " virtual image " closely be focused on the imaging surface of picture pick-up device.
Microscope group C is a relative aperture close to 1 afterwards:1.3 and the short focus objective lens of wide-angular field, because front lens group A and relaying field lens B are mono-
Solely correct spherochromatism, but produce the filed curvature and astigmatism of larger negative ratio chromatism, and negative direction, it is therefore desirable to microscope group C afterwards
The filed curvature and astigmatism of a certain amount of positive multiplying power spherochromatism and positive direction are individually produced while correction spherochromatism, is reached whole
The aberration balancing of optical system.We have selected a monolithic plus the glued structure of one group of three-chip type, and relatively good solves this
Individual problem.Due to being closely imaged, rear microscope group C plays the rear cut-off distance effect for elongating optical system.
Second：Rearmounted aperture diaphragm high definition flake video camera lens of the present invention, have selected bugeye lens very
Few rearmounted constant aperture light bar scheme for using.The reason for using this scheme is the rearmounted constant aperture light on this position
Each visual field particularly edge BEAM SQUINT, it assembles larger upper of picture point while column can play control optical system angular aperture
Light beam is blocked.How to accomplish that it be greatly structure choice as matter can does angular aperture again that can effectively block light with improve whole imaging surface
Key.Additionally, setting rearmounted aperture diaphragm can more effectively reduce the influence of veiling glare.
3rd：Rearmounted aperture diaphragm high definition flake video camera lens of the present invention are also in relaying field lens B and rear mirror
Field stop is provided between group C, after the position of field stop is provided on optical axis aperture light beam and blocks light by front lens group A
The height of axle outward flange light beam is less than the position of the middle visual-field beam to block.So can further improve different visual fields
The symmetry of upper and lower light beam, reduces the spread of each visual field in image planes, improves the uniformity of whole image planes image quality.
For prior art, the present invention has advantages below：
(1) the advantage of the invention is that using more rational front lens group, relaying field lens and rear microscope group optical combination, especially
Be from rearmounted aperture diaphragm and rear microscope group and relaying field lens between ad-hoc location be additionally arranged field stop, effectively block
Deviate the upper and lower light of the associated field of view for assembling picture point, make on axle and the disperse degree of outer each visual-field beam of axle drops significantly
It is low, improve the image quality of whole image planes.Optical lens of the invention is meeting the angle of visual field up to 186 °, relative aperture up to 1:
1.7th, under conditions of definition reaches 250lp/mm, more than 0.3, the relative illumination of peripheral field exceedes the mtf value of whole visual field
0.5, optics overall length is no more than 30mm, realizes the requirement of high definition miniaturization.
(2) it is also an advantage of the present invention that using full spherical structure and the optical material of more cheap good processability, and make
The radius surface of multi-disc lens two is identical (having six in nine), the radius one in three first three face of glue pellet in particularly rear microscope group C
Sample, is improved the manufacturability of processing and processing efficiency, improves the cost performance of camera lens.Optical lens of the present invention is also contemplated
Meet the possibility of particular surroundings requirement, enable it in more areas extensive use.
Brief description of the drawings
Fig. 1 is light beam image-forming principle schematic diagram on the axle of rearmounted aperture diaphragm high definition flake video camera lens of the invention.
Wherein, 2hp1It is the entrance pupil size of optical lens, uA' be front lens group A image space angular aperture, uBAnd uB' it is the thing for relaying field lens B
Side and image space angular aperture, enlargement ratio MIn=uB/uB'=uA′/uB′。uCAnd uC' be rear microscope group C object space and image space angular aperture.
uC' be actually optical lens image space angular aperture u '=uC', the combined focal length f '=hp of camera lens1/u′。
Fig. 2 is the different visual field actual light beams imaging trace of rearmounted aperture diaphragm high definition flake video camera lens of the invention
Schematic diagram.The camber line in wherein left side is the space empty balloon cover section of certain radius.
Fig. 3 is that the optical texture of the embodiment of rearmounted aperture diaphragm high definition flake video camera lens of the invention is illustrated
Figure.Wherein R represents the radius of each lens sphere, and d is the airspace between the thickness or lens of each lens, lf' it is the picture of camera lens
Square rear cut-off distance, lP' it is rearmounted field stop with a distance from image planes.
Fig. 4 be rearmounted aperture diaphragm high definition flake video camera lens of the invention embodiment in the geometric image that calculates
Dygoram.Wherein, the abscissa unit of spherochromatism and astigmatism curve is mm；The abscissa unit of ratio chromatism, curve is micro-
Rice (μm)；The unit of the abscissa of relative distortion curve is %.The ordinate of spherochromatism is different pore size " normalization " ratio.
The ordinate of astigmatism curve, relative distortion curve and ratio chromatism, curve is the ratio of the different visual fields of " normalization ".
Fig. 5 be rearmounted aperture diaphragm high definition flake video camera lens of the invention embodiment in each visual field (0,
0.25 ω, 0.5 ω, 0.75 ω, 0.85 ω, 1 ω) disperse characteristic curve distribution figure, the unit of its maximum ordinate is ±
10 microns, its abscissa is the ratio of different pore size " normalization ".
Fig. 6 is that the relative illumination in the embodiment of rearmounted aperture diaphragm high definition flake video camera lens of the invention is passed through
Rate distribution map.The unit of wherein abscissa is " degree ".
Fig. 7 is " each visual field in the embodiment of rearmounted aperture diaphragm high definition flake video camera lens of the invention
Optical transfer function curve map.The unit of wherein abscissa is：Line is right/mm.
Specific embodiment
Present invention is described in detail with reference to Figure of description and specific embodiment：
Embodiment：
A kind of rearmounted aperture diaphragm high definition fish of rearmounted aperture diaphragm high definition flake video camera lens of the present invention
Eye video camera lens, it is characterised in that：Front lens group A that it includes setting gradually along light incident direction, relaying field lens B, after
Microscope group C and aperture diaphragm 11；
It is burnt that the front lens group A is made up of the negative light of short focus the first lens 1, the second lens 2, the 3rd lens 3 and the 4th lens 4
The microscope group of degree, this four lens are respectively convex-concave negative lens, double-concave negative lens, biconvex positive lens and concavo-convex positive lens, its combination
Focal length is represented with fA ', wherein the 3rd lens 3 and the composition double agglutination lens group of the 4th lens 4；
The relaying field lens B is made up of the 5th lens 5, and the 5th lens 5 are monolithic biconvex positive lens, with fIn' represent it
Focal length value；
The rear microscope group C is made up of the mirror of positive light coke the 6th lens 6, the 7th lens 7, the 8th lens 8 and the 9th lens 9
Group, this four lens are respectively biconvex positive lens, biconvex positive lens, double-concave negative lens, biconvex positive lens；Wherein the 7th lens 7,
8th lens 8 and the 9th lens 9 constitute three balsaming lens groups；
The aperture diaphragm 11 is placed in behind the 9th lens 9, with lp' represent it and the distance between camera lens image planes；With lf' table
Show the rear focal length of optical system；With 2hp1Represent the entrance pupil size of optical system；
Above-mentioned optical system must meet following condition：
0≤|lp′-lf′|<0.15……1
17<fIn′<18,3<MIn<8.1……2
0.13<|hp1/fA′|<0.17……3
1.70<n1<1.75,v1=50.351963 ... 4
Wherein, MInRepresent " relaying " thing for undertaking of relaying field lens B and the enlargement ratio of picture, n1And v1First is represented respectively
The refractive index and Abbe number of lens 1, n8And v8The refractive index and Abbe number of the 8th lens 8, n are represented respectively9And v9Difference table
Show the refractive index and Abbe number of the 9th lens 9.
Setting the above-mentioned purpose must being fulfilled for is：
The purpose of condition (1) setting：The entrance pupil position of the system that guarantee is retouched can reduce close proximity to the first face of camera lens
Axle outward flange light beam the first face height, beneficial to the miniaturization of camera lens.The rear cut-off distance ratio of other " flake " camera lens of the invention
Shorter (lf' ≈ 2.1f '), to adapt to the operating distance requirement of more application fields, should try one's best and reduce this difference.
The purpose of condition (2) setting：Control fB' and enlargement ratio MInScope, on the one hand be ensure camera lens entrance pupil position
Put close proximity to the first face, rearmounted aperture diaphragm is reached the requirement of condition (1) again.In addition put on the axle of setting relaying field lens B
The purpose of big rate scope is the aperture angular region that control enters rear microscope group C.
The purpose of condition (3) setting：The drift angle of angular aperture mainly on the axle of control front lens group A.Front lens group A is set not produce
It is conigenous the senior aberration that body is difficult to aberration on the axle of balance.
The purpose of condition (4) setting：With the optical material of high index of refraction, axle outward flange light beam can be made through the folding in the first face
Firing angle degree becomes smaller, beneficial to the excessive senior amount in the outer visual field of front lens group A reduction axles.According to v1Scope, the glass of selection agrees
Surely it is the harder crown glass that compares, this anti-scratch, protecting against shock beneficial to glass.
The purpose of condition (5) setting：It is to allow the 14th face to produce a certain size negative primary spherical aberration coefficient value (- S1) and just
Primary position chromatic aberration coefficient value (+C1) and negative primary ratio chromatism, coefficient value (- C2), it is produced in itself with group after balance
Spherochromatism and the preceding group of remaining multiplying power of generation.
Rearmounted aperture diaphragm high definition flake video camera lens of the present invention also include being arranged on the He of aperture diaphragm 11
Protective glass 10 between camera lens image planes, the protective glass 10 is parallel flat eyeglass.The protective glass 10 is picture pick-up device
Built-in target surface protective glass.
Rearmounted aperture diaphragm high definition flake video camera lens of the present invention also include being arranged on relaying field lens B with after
Field stop 12 between microscope group C, the position of the field stop 12 is selected in aperture light beam on axle and is cut through by front lens group A
Position of the height of light beam less than other to be cut Intermediate View light beam off field under rim ray.
In above-described embodiment, the optical material order used by the lens 9 of the first lens 1 to the 9th and protective glass 10 is H-
LaK8A, H-ZBaF50, H-ZBaF50, H-ZF52A, H-BaK3, H-K9L, H-K7, H-ZF11, H-BaK6 and H-K9L.
The refractive index and Abbe number of the optical glass material that each eyeglass is used are respectively with n1,n2,……n10And v1,
v2……v10Represent.The radius and thickness (airspace) of each eyeglass are respectively with R1,R2……R19And d1,d2……d19Represent.With
fCThe combined focal length of microscope group C after ' expression.The 5th lens 5 are provided between front lens group A and rear microscope group C and (call relaying field lens in the following text
B), with fB' its focal length value is represented, with MInRepresent the enlargement ratio of its " relaying " thing for undertaking and picture.
The above embodiment of the present invention is characterized mainly in that：Using the optics knot that aperture diaphragm is placed in after optical system
Structure.The present invention by focal power distribution (negative, positive, just) and front lens group A rational in infrastructure, relay constituting for field lens B and rear microscope group C.
The angular aperture and the size of the angle of visual field undertaken according to it, allow front lens group A to undertake less aperture drift angle, and emphasis plays an angle of visual field
The outer senior aberration of remaining axle that microscope group C wide-angle does not allow it to produce again after is difficult to balance is progressively reduced to by ultra-wide angle distribution；Because preceding
The angle of visual field is reduced to wide-angle by microscope group A, and rear microscope group C can be allowed to undertake larger aperture drift angle, and the present invention uses the knot of three gluing units
Structure, while allowing it to correct spherochromatism on the axle of itself, remains outside the axle for producing the outer primary aberration balance front lens group A of a certain amount of axle
After image is poor；Relaying field lens B plays a part of the entrance pupil of front lens group A to connect with rear microscope group C emergent pupils " pupil pupil ", after have compressed entrance
The beam heights of microscope group C, reduce light bar spherical aberration, and produce spherochromatism on axle to balance remaining spherochromatism on the axle of front lens group A.Make
Whole optical system (in addition to distortion) exceedes 180 ° of the angle of visual field, D/f=1:1.7th, definition exceedes in the mtf value of 250lp/mm
0.30.Rearmounted aperture diaphragm plays a part of light beam column light on control angular aperture and each visual field, and it can also rise and eliminate veiling glare
Effect.By under front lens group A is to edge light beam light block light after, the illumination of peripheral field is more than 50%.Optics overall length does not surpass
30mm, realizes the requirement of high definition miniaturization.
The above embodiment of the present invention is further characterized in that：A visual field light is provided between field lens B and rear microscope group C is relayed
Column, it plays to block middle visual field and deviate it assembles the lower light beam of the larger actual light of picture point, but does not influence on axle and
The lower light beam of the actual light blocked by preceding group passes through.The disperse degree of the middle actual light in each visual field is reduced, is improve whole
The image quality of individual image planes.
Optical camera lens device of the present invention is further characterized in that：Make to have in nine lens two radius surfaces of six-element lens to be identical
, the inexpensive optical material of full spherical lens and good processability is employed, processing technology and efficiency of assembling is greatly improved,
Improve the cost performance of product.
Table 1 is the instance data of Optical devices of the present invention
E.F.L=1mm, FNO=1.70,2 ω=187.4 °
Table 1
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modification, should all belong to covering scope of the invention.
Claims (5)
1. a kind of rearmounted aperture diaphragm high definition flake video camera lens, it is characterised in that：It include along light incident direction according to
The front lens group A of secondary setting, relaying field lens B, rear microscope group C and aperture diaphragm (11)；
The front lens group A is made up of short focus the first lens (1), the second lens (2), the 3rd lens (3) and the 4th lens (4) and bears
The microscope group of focal power, this four lens are respectively convex-concave negative lens, double-concave negative lens, biconvex positive lens and concavo-convex positive lens, its
Combined focal length is with fA' represent, wherein the 3rd lens (3) and the 4th lens (4) composition double agglutination lens group；
The relaying field lens B is made up of the 5th lens (5), and the 5th lens (5) are monolithic biconvex positive lens, with fIn' represent it
Focal length value；
The rear microscope group C constitutes positive light coke by the 6th lens (6), the 7th lens (7), the 8th lens (8) and the 9th lens (9)
Microscope group, this four lens are respectively biconvex positive lens, biconvex positive lens, double-concave negative lens, biconvex positive lens；Wherein the 7th is saturating
Mirror (7), the 8th lens (8) and the 9th lens (9) constitute three balsaming lens groups；
The aperture diaphragm (11) is placed in behind the 9th lens (9), with lp' represent it and the distance between camera lens image planes；With lf' table
Show the rear focal length of optical system；With 2hp1Represent the entrance pupil size of optical system；
Above-mentioned optical system must meet following condition：
0≤|lp′-lf′|<0.15 ……(1)
17<fIn′<18,3<MIn<8.1 ……(2)
0.13<|hp1/fA′|<0.17 ……(3)
1.70<n1<1.75,v1=50.351963 ... (4)
Wherein, MInRepresent " relaying " thing for undertaking of relaying field lens B and the enlargement ratio of picture, n1And v1The first lens are represented respectively
(1) refractive index and Abbe number, n8And v8The refractive index and Abbe number of the 8th lens (8), n are represented respectively9And v9Difference table
Show the refractive index and Abbe number of the 9th lens (9).
2. rearmounted aperture diaphragm high definition flake video camera lens according to claim 1, it is characterised in that：It also includes
The field stop (12) between relaying field lens B and rear microscope group C is arranged on, the position of the field stop (12) is selected in aperture on axle
Position of the height of light beam less than other to be cut Intermediate View light beam off field under light beam and the rim ray cut through by front lens group A
Put.
3. rearmounted aperture diaphragm high definition flake video camera lens according to claim 2, it is characterised in that：It also includes
The protective glass (10) between aperture diaphragm (11) and camera lens image planes is arranged at, the protective glass (10) is parallel flat plate lens
Piece.
4. rearmounted aperture diaphragm high definition flake video camera lens according to claim 1 or 2 or 3, its feature also exists
In：All lens use full spherical lens, and the absolute value of front and rear two radius surface of multi-disc lens is identical.
5. rearmounted aperture diaphragm high definition flake video camera lens according to claim 4, it is characterised in that：Wherein 6
The absolute value of front and rear two radius surface of lens is identical.
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| CN201410852586.4A CN104597584B (en) | 2014-12-31 | 2014-12-31 | Rearmounted aperture diaphragm high definition flake video camera lens |
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| CN105182507B (en) * | 2015-10-28 | 2017-06-23 | 东莞市宇瞳光学科技股份有限公司 | A kind of wide-angle tight shot |
| CN107167896B (en) * | 2017-05-27 | 2023-04-28 | 福鼎市一雄光学仪器有限公司 | High-definition underwater video camera lens |
| US11442255B2 (en) * | 2017-06-02 | 2022-09-13 | Owl Labs, Inc. | Wide angle lens and camera system for peripheral field of view imaging including eight lenses of ---++-++ or nine lenses of ----++-++ refractive powers |
| CN110361834B (en) * | 2019-06-28 | 2021-08-10 | 福建福光股份有限公司 | Wide-angle lens with low distortion and high relative illumination and working method thereof |
| CN111290103B (en) * | 2020-02-20 | 2021-11-23 | 北京华北莱茵光电技术有限公司 | Large-area-array medium-wave infrared double-view-field optical system |
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| JPH11194266A (en) * | 1997-10-29 | 1999-07-21 | Fuji Photo Optical Co Ltd | Wide angle lens |
| CN103081458A (en) * | 2010-08-27 | 2013-05-01 | 3M创新有限公司 | Projection lens for projection display systems |
| CN103501404B (en) * | 2013-10-21 | 2016-08-24 | 四川红光汽车机电有限公司 | Panorama viewing mirror |
| CN204439916U (en) * | 2014-12-31 | 2015-07-01 | 福建福特科光电股份有限公司 | Rearmounted aperture diaphragm high definition flake video camera lens |
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2014
- 2014-12-31 CN CN201410852586.4A patent/CN104597584B/en active Active
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Effective date of registration: 20201225 Address after: No.39, Gongye South Road, Nanxiang, Ninghua County, Sanming City, Fujian Province, 365400 Patentee after: SANMING FOCTECK PHOTONICS Co.,Ltd. Address before: No.8, No.7 Road, phase II, Tieling industrial concentration zone, Minhou County, Fuzhou City, Fujian Province Patentee before: FOCTEK PHOTONICS, Inc. |
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