CN208580258U - A kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector - Google Patents
A kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector Download PDFInfo
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Abstract
The utility model provides a kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector, it is characterised in that: along the light direction of propagation successively includes a spherical reflector, multiple imaging compensating lens groups with diaphragm；Each imaging compensating lens group with diaphragm constitutes an individual imaging band；Whole system is coaxial system, and to guarantee that imaging compensating lens group is not blocked mutually with incident ray, the chief ray in each channel deviates a specific visual field；Multiple imaging compensating lens groups are fan-shaped to be distributed at the light out of concentric ball mirror, and in the same plane not with incident light；The multiple imaging compensating lens group includes multiple short focus compensating glass, multiple middle burnt compensating glass and multiple focal length compensating glass, the multiple imaging lenticule group uses different visual fields the correction microscope group aberration correction of different focal length, to guarantee consistently first high-resolution.
Description
Technical field
The utility model relates to optical imaging fields, and in particular to a kind of coaxial anorthopia field pattern based on spherical reflector is long
Wave infrared system.It is mainly used for spaceborne a wide range of intermediate resolution meteorological observation, it can also be used to which urban safety monitoring, territory are general
The fields such as look into, prevent and reduce natural disasters.
Background technique
Satellite ocean remote sensing plays a significant role observation and research global ocean environment and marine resources, its main feature is that fastly
It is speed, continuous, a wide range of and multiple parameters can be observed simultaneously.The whole world has transmitted the meteorological satellite of more detection oceans, main remote sensing
Device includes visible light multispectral scanner radiometer, and feature is that sensitivity and signal-to-noise ratio are high, and scanning field of view is wide, and image deformation is small.When
Preceding satellite load is all made of fixed focal length camera and the scheme of sweep mechanism or fixed focal length polyphaser array is added to realize big view
Field imaging, causes the resolution gap of substar and peripheral field excessive, influences the result of meteorological detection.Realize the ground such as full filed
First resolution ratio, the resolution gap for reducing substar and peripheral field are of great significance for meteorological detection.
The wide visual field ocean remote sensing device SeaWiFS carried on Orbview-2 satellite, scans ± 58.3 ° using sweeping mode,
The super large breadth of 2800km is realized, substar resolution ratio is 1.13km.The intermediate-resolution imaging carried on EOS Terra satellite
Spectrometer MODIS scans ± 55 ° using sweeping mode, realizes the scanning breadth of 2330km, substar resolution ratio is in different spectrums
Section is respectively 250m, 500m and 1000m.The visible light infrared imaging radiation instrument that SSO (Sun Synchronous Orbit) running environment satellite system NPOESS is carried
VIIRS scans ± 55.8 ° using sweeping mode, realizes the super large breadth of 3000km, and substar resolution ratio is 390m.
The MERIS carried on Envisat-1 satellite is realized using the camera array of 5 fixed focal length camera compositions in 68.5 ° of visual fields
Push-scanning image, realizes the imaging of 1150km breadth, and substar resolution ratio is 250m.The OLCI carried on Sentinel-3 satellite, is adopted
It is realized with the camera array of 5 fixed focal length camera compositions to push-scanning image in 68.4 ° of visual fields, realizes the imaging of 1150km breadth,
Substar resolution ratio is 300m.China first generation polar orbiting meteorological satellite series FY-1 is equipped with multichannel visible light and infrared scan
Radiancy meter (MVISR), scanning angle are ± 55.4 °, and substar resolution ratio reaches 1.1km, and peripheral field resolution ratio is about
4km, imaging breadth is about 2800km.Moderate resolution imaging spectrometer is equipped on second generation polar orbiting meteorological satellite series FY-3
(MERSI), scanning angle is ± 55.4 °, and substar resolution ratio reaches 0.1km, and peripheral field resolution ratio is about 2.4km, imaging
Breadth is about 2800km.The ten wave band ocean color scanners of ocean No.1 (HY-1) Seeds of First Post-flight are scanned using sweeping mode ±
35.2 °, substar resolution ratio is 1100m.As can be seen that the load of current weather satellite, which uses, pushes away the technical solution swept with sweeping
It is all based on fixed focal length image distance combination scan mechanism and realizes big visual field, low distortion imaging.Due to using fixed focal length camera, greatly
Visual field causes the subtended angle of imaging over the ground and image-forming range of substar and peripheral field to have a long way to go, and leads to substar and peripheral field
Resolution gap it is excessive.By taking the Moderate Imaging Spectroradiomete MODIS carried on EOS Terra satellite as an example, substar point
When resolution is 500m, the resolution ratio of peripheral field is about 2700m.
Duke Univ USA D.J.Brady etc. artificially solves big visual field, low distortion, high-resolution imaging are proposed based on same
The multiple dimensioned Optical System Design scheme of bulbus cordis lens.Full filed is divided into multiple sub- visual fields, each sub- visual field by the program
There is independent compensating glass to compensate local aberration, guarantees in single sub- visual field that image quality is good and distortion very little, multiple subsystems
The low distortion of high imaging quality in full filed is realized in splicing.Domestic more units have also applied for related patents: the space of Beijing in 2012
A kind of patent " novel high-resolution large-viewing-field optical imagery system of applied 103064171 A of Patent No. of electromechanical research
System ", the patent of 203838419 U of Patent No. of the application of University Of Suzhou in 2013 " is used for extensive high-definition remote sensing camera
Optical imaging system ", University Of Suzhou in 2014 application Patent No. 204188263U a kind of patent " wide field staring formula
Spectrum imaging system ", the patent " ultrahigh resolution of the Patent No. 104079808A of the application of Xian Electronics Science and Technology University in 2014
Wide field imaging system " and the Xi'an optical precision optical machinery research institute Patent No. ZL 201610265166.5 applied in 2016
Patent " be based on the nearly multispectral optical system of hemisphere visual field constant resolution of spherical reflector Larger Dynamic range ".Though the above patent
It is so different in terms of content, but common ground is all based on the concentric multiple dimensioned design of concentric globe lens.By the low of infra-red material
The concentric Multiscale System scheme of the influence of transmissivity, transmission-type is difficult to apply to infrared band.
Utility model content
Demand infrared band is imaged under more and more application environments, for the big visual field of infrared band demand, low distortion, height
The demand of image quality optical system, the utility model proposes the coaxial anorthopia field pattern LONG WAVE INFRARED systems based on spherical reflector
System.The optical system have image quality is high, imaging viewing field is big, full filed consistently first resolution ratio, be operable with infrared band
The features such as.
It is red that the technical solution of the utility model is to provide a kind of coaxial anorthopia field pattern long wave based on spherical reflector
External system is characterized in that along the light direction of propagation successively include a spherical reflector and multiple imagings with diaphragm
Compensate lens group；
Whole system is coaxial system；Above-mentioned spherical reflector is coaxially set with multiple imaging compensating lens groups with diaphragm
It sets and coaxial with incident light axis；
Multiple imaging compensating lens groups with diaphragm are fan-shaped to be distributed in the going out at light of spherical reflector, and be incident to
The incident light of spherical reflector is in Different Plane；Each imaging compensating lens group with diaphragm constitutes an individually imaging
Channel, to guarantee that imaging compensating lens group is not blocked mutually with incident ray, the chief ray of each imaging band deviates one
The visual field of a setting；
Above-mentioned multiple imaging compensating lens groups with diaphragm include multiple short focus compensating glass, multiple middle burnt compensating glass and more
A focal length compensating glass, multiple imaging lenticule groups use different visual fields the correction microscope group aberration correction of different focal length, with
Guarantee consistently first high-resolution.
It is coaxial relation between above-mentioned same spherical reflector and each compensation lens group, due at narrow visual field direction and center
Zero visual field deviates from certain angle, and leading to the actual use part of spherical reflector is only the off-axis part for deviateing symmetrical centre；
Due to each channel narrow visual field direction choose it is consistent, the mirror portion central point that thus each channel utilizes is identical,
All systems can be stitched together by extension spherical reflector, realize extremely wide field of view imaging.
Preferably, multiple imaging compensating lens groups with diaphragm are fan-shaped is evenly arranged at the light out of same spherical reflector.
Preferably, short focus compensating glass includes the first negative lens, the first positive lens, cold stop window set gradually along optical path
Mouth, the second positive lens, the second negative lens；The optical characteristics of above-mentioned first negative lens are as follows: -3f '2<f’21<-2f’2,-4f’2<R21
<-3f’2,-7f’2<R22<-5f’2；The optical characteristics of above-mentioned first positive lens are as follows: 3f '2<f’22<4f’2,-f’2<R23<0,-f’2<
R24<0；The optical characteristics of above-mentioned second positive lens are as follows: 4f '2<f’23<5f’2,-f’2<R25<-2f’2,-f’2<R26<-2f’2；It is above-mentioned
The optical characteristics of second negative lens are as follows: -2f '2<f’24<-f’2,-5f’2<R27<-4f’2,3f’2<R28<4f’2；Wherein, f '2It is short
The focal length of burnt compensating glass, f '2> 0, f '21、f’22、f’23、f’24It is followed successively by the focal length of four lens of composition short focus compensating glass；R21、
R22、R23、R24、R25、R26、R27、R28It is followed successively by 8 radius of curvature corresponding to four lens.
Preferably, middle burnt compensating glass includes the first negative lens, the first positive lens, cold stop window set gradually along optical path
Mouth, the second positive lens, the second negative lens；The wherein optical characteristics of the first negative lens are as follows: -3f '3<f’31<-2f’3, -4f '3<R31
<-3f’3, -7f '3<R32<-6f’3；The optical characteristics of first positive lens are as follows: 3f '3<f’32<4f’3,-f '3<R33< 0 ,-f '3<R34<
0；The optical characteristics of second positive lens are as follows: 5f '3<f’33<6f’3, -3f '3<R35<-2f’3, -2f '3<R36<-2f’3；Second is negative
The optical characteristics of mirror are as follows: -2f '3<f’34<-f’3, -5f '3<R37<-4f’3, 2f '3<R38<3f’3；Wherein, f '3For middle burnt compensating glass
Focal length, f '3>0；f'31、f’32、f’33、f’34It is followed successively by the focal length of four lens of burnt compensating glass in composition；R31、R32、R33、
R34、R35、R36、R37、R38It is followed successively by 8 radius of curvature corresponding to four lens.
Preferably, focal length compensating glass includes the first negative lens, the first positive lens, cold stop window set gradually along optical path
Mouth, the second positive lens, the second negative lens；The wherein optical characteristics of the first negative lens are as follows: -2f '4<f’41<-f’4, -4f '4<R41<-
3f’4, -10f '4<R42<-9f’4；The optical characteristics of first positive lens are as follows: 3f '4<f’42<4f’4,-f '4<R43< 0 ,-f '4<R44<0；
The optical characteristics of second positive lens are as follows: 5f '4<f’43<6f’4, -3f '4<R45<-2f’4, -2f '4<R46<-f’4；Second negative lens
Optical characteristics are as follows:-f '4<f’44<-0.5f’4, -3f '4<R47<-2f’4, 2f '4<R48<3f’4；Wherein, f '4For focal length compensating glass
Focal length, f '4>0；f'41、f’42、f’43、f’44It is followed successively by the focal length of four lens of composition focal length compensating glass；R41、R42、R43、R44、
R45、R46、R47、R48It is followed successively by 8 radius of curvature corresponding to four lens.
Preferably, system selection pushes away the imaging pattern swept, and the visual field of each imaging band is selected as narrow strips visual field,
The wide visual field of different imaging bands covers entire imaging viewing field by overlapped 5%, and all narrow visual fields are deviation center
The narrowband visual field of visual field certain angle, the imaging compensating lens group of whole system are only being arranged on direction perpendicular to pushing away to sweep.
Preferably, in order to guarantee the consistency of each view field imaging quality, short focus compensating glass, middle burnt compensating glass and focal length compensation
Mirror relative aperture having the same.
Preferably, in order to guarantee mutually do between the imaging compensating lens for arranging enough and each compensation lens
It relates to, the distance between spherical reflector and the imaging compensating lens group with diaphragm are twice of optical system focal length or more.
Full filed is segmented, the visual field in each channel is limited, and at system stop be arranged glass plate, pass through by
The mode of part-compensating lens refrigeration realizes cold stop.
The beneficial effects of the utility model are:
1, the utility model is realized in entire visual field plus each compensation lens group close to diffraction using spherical reflector
The image quality of the limit；Diaphragm setting inside compensation lens group, spherical reflector full filed rotational symmetry is made full use of
Optical characteristics；The effective viewing field of optical system theoretically can be close to 360 °, can obtain greatly in conjunction with the imaging pattern swept is pushed away
Imaging breadth；Within the scope of the full filed close to 360 °, the distortion of all visual fields is less than 5%；
2, it is spaced between spherical reflector and compensation lens group and opens very much, can effectively separate the imaging in each channel
Beam is conducive to spuious Xanthophyll cycle；Interference of the local intense light source to entire field is avoided simultaneously, Larger Dynamic range may be implemented
Imaging detection；
3, imaging spectral coverage covers 8-12 μm, covers common long wave infrared region；
4, in order to realize consistently first resolution ratio in different visual fields, three kinds of correction microscope group is used for different visual fields
Aberration correction realizes short focus, middle burnt and focal length on the basis of the same globe lens to guarantee consistently first high-resolution；Simultaneously
Short, middle burnt and focal length system relative aperture F# having the same, to further ensure the consistent of each view field imaging quality
Property；
5, in conjunction with pushing away the imaging pattern swept, the imaging lenticule of whole system is arranged just in and sweeps on direction perpendicular to pushing away, phase
The quantity of camera can be significantly reduced for face battle array imaging；It quiet to entire spheric reflection can be cut simultaneously and (cut it
Leave afterwards is Perimeter Truss Reflector) only retain required part, the volume and quality of the reduction camera that can be increased；
6, optics overall length long enough when short focus, middle burnt and focal length system design, it is ensured that arrange in image planes enough
Camera and each camera between will not interfere；Apart from long enough, this point between spherical reflector and compensation lens group
It is good for the veiling glare inhibition in later period；The eyeglass arrangement for forming correction microscope group simultaneously is very close, and system is installed and is filled
It adjusts all highly beneficial；
7, in view of LONG WAVE INFRARED system is passed through frequently with refrigeration mode, in common scheme generally by the way of cold stop
It solves；But the imaging viewing field of system is limited using cold stop scheme, full filed is segmented in our scheme, each
The visual field in channel is limited, and glass plate is arranged at system stop, is realized in such a way that part-compensating lens freeze
Cold stop.
8, whole system is coaxial system, is easy to adjustment.
Detailed description of the invention
Fig. 1 a is the incident optical splice schematic diagram of the utility model optical system；
Fig. 1 b is that the imaging compensating lens group of the utility model optical system splices schematic diagram；
Fig. 2 a, Fig. 2 b and Fig. 2 c are respectively that the utility model optical system is shown in short focus, the middle burnt and corresponding structure of focal length
It is intended to；
Fig. 3 d, Fig. 3 e and Fig. 3 f are respectively that the utility model optical system is bent in short focus, the corresponding MTF of middle burnt and focal length
Line；
Fig. 4 g, Fig. 4 h and Fig. 4 i are respectively the utility model optical system in short focus, middle burnt and focal length figure of optical lens preferred embodiment；
Fig. 5 j, Fig. 5 k and Fig. 5 l are respectively the utility model optical system in short focus, middle burnt and focal length the curvature of field and distortion
Curve.
Appended drawing reference in figure are as follows: 1- spherical reflector；2- short focus compensating glass, burnt compensating glass, 4- focal length compensating glass in 3-；
21- short focus compensates the first negative lens of microscope group, and 22- short focus compensates the first positive lens of microscope group, and 23- short focus compensates the window of microscope group
Glass, 24- short focus compensate the second positive lens of microscope group, and 25- short focus compensates the second negative lens of microscope group；Burnt compensation microscope group in 31-
The first negative lens, the first positive lens of burnt compensation microscope group in 32-, the window glass of burnt compensation microscope group in 33- is burnt in 34- to mend
The second positive lens of microscope group is repaid, the second negative lens of burnt compensation microscope group in 35-；41- focal length compensates the first negative lens of microscope group,
42- focal length compensates the first positive lens of microscope group, and 43- focal length compensates the window glass of microscope group, and the second of 44- focal length compensation microscope group is just
Lens, 45- focal length compensate the second negative lens of microscope group；
Specific embodiment
The utility model is further described below in conjunction with attached drawing.
As shown in Figure 1 a, 1 b, it is the structural schematic diagram of the utility model optical system, spherical surface is placed on optical path
Reflecting mirror 1.In order to individually inhibit veiling glare to the corresponding imaging band of each correction microscope group, and make full use of spherical reflector 1 complete
The optical characteristics of visual field rotational symmetry is sequentially placed according to optical design result in 1 front corresponding position of spherical reflector each
Imaging compensating microscope group；The imaging beam of each imaging band is avoided local intense light source and is done to entire field by effectively separated
It disturbs, the imaging detection of Larger Dynamic range may be implemented.In conjunction with the imaging pattern swept is pushed away, the imaging lenticule of whole system is only arranged
It is sweeping on direction perpendicular to pushing away, the quantity of camera can be significantly reduced relative to face battle array imaging；It simultaneously can be saturating to entire ball
Mirror, which is cut, only retains required part, can greatly reduce the volume and quality of camera.
Imaging microlens system includes short focus compensating glass 2, middle burnt compensating glass 3 and focal length compensating glass 4；Such as Fig. 2 a, Fig. 2 b and
The utility model optical system is individually given shown in Fig. 2 c in short focus, the middle burnt and corresponding structural schematic diagram of focal length.
Wherein, short focus compensating glass 2 is using five lens compositions, as shown in Fig. 1 b and Fig. 2 a, successively along light incident direction
Are as follows: short focus compensates the first negative lens 21 of microscope group, and short focus compensates the first positive lens 22 of microscope group, and short focus compensates the window glass of microscope group
Glass 23, short focus compensate the second positive lens 24 of microscope group, and short focus compensates the second negative lens 25 of microscope group.The light of above-mentioned first negative lens
Learn characteristic are as follows: -3f '2<f’21<-2f’2,-4f’2<R21<-3f’2,-7f’2<R22<-5f’2；The optical characteristics of first positive lens are as follows:
3f’2<f’22<4f’2,-f’2<R23<0,-f’2<R24<0；The optical characteristics of second positive lens are as follows: 4f '2<f’23<5f’2,-f’2<R25
<-2f’2,-f’2<R26<-2f’2；The optical characteristics of second negative lens are as follows: -2f '2<f’24<-f’2,-5f’2<R27<-4f’2,3f’2<
R28<4f’2；Wherein, f '2For the focal length of short focus compensating glass, f '2> 0, f '21、f’22、f’23、f’24It is followed successively by composition short focus compensating glass
Four lens focal length；R21、R22、R23、R24、R25、R26、R27、R28It is followed successively by 8 radius of curvature corresponding to four lens.
Middle coke compensating glass 3 is using five lens compositions, as shown in Fig. 1 b and Fig. 2 b, successively along light incident direction are as follows: in
First negative lens 31 of coke compensation microscope group, the first positive lens 32 of middle burnt compensation microscope group, the window glass 33 of middle burnt compensation microscope group,
Second positive lens 34 of middle burnt compensation microscope group, the second negative lens 35 of middle burnt compensation microscope group.Wherein the optics of the first negative lens is special
Property are as follows: -3f '3<f’31<-2f’3, -4f '3<R31<-3f’3, -7f '3<R32<-6f’3；The optical characteristics of first positive lens are as follows: 3f '3
<f’32<4f’3,-f '3<R33< 0 ,-f '3<R34<0；The optical characteristics of second positive lens are as follows: 5f '3<f’33<6f’3, -3f '3<R35<-
2f’3, -2f '3<R36<-2f’3；The optical characteristics of second negative lens are as follows: -2f '3<f’34<-f’3, -5f '3<R37<-4f’3, 2f '3<
R38<3f’3；Wherein, f '3For the focal length of middle burnt compensating glass, f '3>0；f'31、f’32、f’33、f’34It is followed successively by burnt compensating glass in composition
Four lens focal length；R31、R32、R33、R34、R35、R36、R37、R38It is followed successively by 8 radius of curvature corresponding to four lens.
Focal length compensating glass 4 is using four lens compositions, as shown in Fig. 1 b and Fig. 2 c, successively along light incident direction are as follows: long
First negative lens 41 of coke compensation microscope group, focal length compensate the first positive lens 42 of microscope group, and focal length compensates the window glass 43 of microscope group,
Focal length compensates the second positive lens 44 of microscope group, and focal length compensates the second negative lens 45 of microscope group.Wherein the optics of the first negative lens is special
Property are as follows: -2f '4<f’41<-f’4, -4f '4<R41<-3f’4, -10f '4<R42<-9f’4；The optical characteristics of first positive lens are as follows: 3f '4
<f’42<4f’4,-f '4<R43< 0 ,-f '4<R44<0；The optical characteristics of second positive lens are as follows: 5f '4<f’43<6f’4, -3f '4<R45<-
2f’4, -2f '4<R46<-f’4；The optical characteristics of second negative lens are as follows:-f '4<f’44<-0.5f’4, -3f '4<R47<-2f’4, 2f '4<
R48<3f’4；Wherein, f '4For the focal length of focal length compensating glass, f '4>0；f'41、f’42、f’43、f’44It is followed successively by composition focal length compensating glass
Four lens focal length；R41、R42、R43、R44、R45、R46、R47、R48It is followed successively by 8 radius of curvature corresponding to four lens.
The system focal length short focus of optical system provided by the present embodiment, middle burnt and focal length be followed successively by 59.04mm,
65.51mm and 90mm；The corresponding full filed of different focal length is followed successively by 22.12 °, 20 ° and 16 °, corresponding detector pixel
Size is respectively 75 μm, 50 μm, 25 μm, and 110 ° of full filed is realized by splicing；Short focus, middle burnt and focal length system F# are
2, full filed is without vignetting.As shown in Fig. 3 d, Fig. 3 e, Fig. 3 f, Fig. 4 g, Fig. 4 h, Fig. 4 i, Fig. 5 j, Fig. 5 k and Fig. 5 l, at 8 μm -12 μm
MTF is close to diffraction limit within the scope of full filed in wavelength band, and relative distortion is less than 5%, relative to central wavelength (10 μm)
5 μm of deviation of disc of confusion energy mass center within.If, can be at 110 ° by the camera applications on the Near Earth Orbit Satellites of 800km
The image quality close to diffraction limit that consistently first resolution ratio is better than 1200m is obtained in field range.
Optical system is using pushing away the mode swept, so image camera only needs to be distributed in perpendicular to pushing away on the direction swept, it is right
It can be cut away in extra spherical reflector part, can greatly reduce the complexity of optical system in this way, while
Conducive to the small light for realizing camera.
Orbital flight height may be implemented in same F# and visual field by carrying out equal proportion scaling to the embodiment
Degree is less than in the case of 800km, the image quality close to diffraction limit is being realized close in 180 ° of visual fields, and can regard at 110 °
There is consistently first resolution ratio in the range of field.
Claims (9)
1. a kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector, it is characterised in that: along the light direction of propagation
It successively include a spherical reflector and multiple imaging compensating lens groups with diaphragm；
The spherical reflector is with multiple imaging compensating lens group coaxial arrangements with diaphragm and coaxial with incident light axis；
Multiple imaging compensating lens groups with diaphragm are fan-shaped to be distributed in the going out at light of spherical reflector, and be incident to spherical surface
The incident light of reflecting mirror is in Different Plane；It is logical that each imaging compensating lens group with diaphragm constitutes an individual imaging
Road, the chief ray of each imaging band deviate the visual field of a setting；
The multiple imaging compensating lens group with diaphragm includes multiple short focus compensating glass, multiple middle burnt compensating glass and multiple length
Burnt compensating glass.
2. a kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector according to claim 1, feature
It is: at the fan-shaped light out for being evenly arranged on same spherical reflector of multiple imaging compensating lens groups with diaphragm.
3. a kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector according to claim 2, feature
Be: short focus compensating glass includes that the first negative lens set gradually along optical path, the first positive lens, cold stop window, second are just saturating
Mirror, the second negative lens；The optical characteristics of above-mentioned first negative lens are as follows: -3f '2<f’21<-2f’2,-4f’2<R21<-3f’2,-7f’2<
R22<-5f’2；The optical characteristics of above-mentioned first positive lens are as follows: 3f '2<f’22<4f’2,-f’2<R23<0,-f’2<R24<0；Above-mentioned
The optical characteristics of two positive lens are as follows: 4f '2<f’23<5f’2,-f’2<R25<-2f’2,-f’2<R26<-2f’2；Above-mentioned second negative lens
Optical characteristics are as follows: -2f '2<f’24<-f’2,-5f’2<R27<-4f’2,3f’2<R28<4f’2；Wherein, f '2For short focus compensating glass
Focal length, f '2> 0, f '21、f’22、f’23、f’24It is followed successively by the focal length of four lens of composition short focus compensating glass；R21、R22、R23、R24、
R25、R26、R27、R28It is followed successively by 8 radius of curvature corresponding to four lens.
4. a kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector according to claim 2, feature
Be: middle coke compensating glass includes that the first negative lens set gradually along optical path, the first positive lens, cold stop window, second are just saturating
Mirror, the second negative lens；The wherein optical characteristics of the first negative lens are as follows: -3f '3<f’31<-2f’3, -4f '3<R31<-3f’3, -7f '3<
R32<-6f’3；The optical characteristics of first positive lens are as follows: 3f '3<f’32<4f’3,-f '3<R33< 0 ,-f '3<R34<0；Second positive lens
Optical characteristics are as follows: 5f '3<f’33<6f’3, -3f '3<R35<-2f’3, -2f '3<R36<-2f’3；The optical characteristics of second negative lens
Are as follows: -2f '3<f’34<-f’3, -5f '3<R37<-4f’3, 2f '3<R38<3f’3；Wherein, f '3For the focal length of middle burnt compensating glass, f '3>0；
f’31、f’32、f’33、f’34It is followed successively by the focal length of four lens of burnt compensating glass in composition；R31、R32、R33、R34、R35、R36、R37、
R38It is followed successively by 8 radius of curvature corresponding to four lens.
5. a kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector according to claim 2, feature
Be: focal length compensating glass includes that the first negative lens set gradually along optical path, the first positive lens, cold stop window, second are just saturating
Mirror, the second negative lens；The wherein optical characteristics of the first negative lens are as follows: -2f '4<f’41<-f’4, -4f '4<R41<-3f’4, -10f '4<
R42<-9f’4；The optical characteristics of first positive lens are as follows: 3f '4<f’42<4f’4,-f '4<R43< 0 ,-f '4<R44<0；Second positive lens
Optical characteristics are as follows: 5f '4<f’43<6f’4, -3f '4<R45<-2f’4, -2f '4<R46<-f’4；The optical characteristics of second negative lens
Are as follows:-f '4<f’44<-0.5f’4, -3f '4<R47<-2f’4, 2f '4<R48<3f’4；Wherein, f '4For the focal length of focal length compensating glass, f '4>
0；f'41、f’42、f’43、f’44It is followed successively by the focal length of four lens of composition focal length compensating glass；R41、R42、R43、R44、R45、R46、
R47、R48It is followed successively by 8 radius of curvature corresponding to four lens.
6. a kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector according to any one of claims 1 to 5,
It is characterized by: system selection pushes away the imaging pattern swept, the visual field of each imaging band is selected as narrow strips visual field, different
The wide visual field of imaging band covers entire imaging viewing field by overlapped 5%, and all narrow visual fields are to deviate central vision
The narrowband visual field of certain angle, the imaging compensating lens group of whole system are only being arranged on direction perpendicular to pushing away to sweep.
7. a kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector according to any one of claims 1 to 5,
It is characterized by: short focus compensating glass, middle burnt compensating glass and focal length compensating glass relative aperture having the same.
8. a kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector according to any one of claims 1 to 5,
It is characterized by: the distance between spherical reflector and the imaging compensating lens group with diaphragm be twice of optical system focal length with
On.
9. according to a kind of any coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector of claim 3 to 5,
It is characterized by: cold stop window includes diaphragm and the glass plate that is arranged at diaphragm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061859A (en) * | 2018-06-04 | 2018-12-21 | 中国科学院西安光学精密机械研究所 | A kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector |
| CN111338078A (en) * | 2020-04-16 | 2020-06-26 | 北京空间机电研究所 | Few-pixel optical imaging system |
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2018
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061859A (en) * | 2018-06-04 | 2018-12-21 | 中国科学院西安光学精密机械研究所 | A kind of coaxial anorthopia field pattern LONG WAVE INFRARED system based on spherical reflector |
| CN109061859B (en) * | 2018-06-04 | 2024-04-05 | 中国科学院西安光学精密机械研究所 | Coaxial eccentric field type long wave infrared system based on spherical reflector |
| CN111338078A (en) * | 2020-04-16 | 2020-06-26 | 北京空间机电研究所 | Few-pixel optical imaging system |
| CN111338078B (en) * | 2020-04-16 | 2022-08-12 | 北京空间机电研究所 | Few-pixel optical imaging system |
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