CN209417404U - Wide-spectrum non-focusing all-sky airglow imager - Google Patents
Wide-spectrum non-focusing all-sky airglow imager Download PDFInfo
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- 238000004501 airglow Methods 0.000 title claims abstract description 37
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Abstract
The utility model relates to an airglow imager surveys that the visual field is little, spectral range is narrow and need adopt mechanical focusing device to current airglow imager, leads to the imager structure and uses the luminous flux low scheduling problem of operation complicacy and imager, provides a wide band non-focusing all sky airglow imager. The imager comprises an image space telecentric fisheye lens, an object space telecentric imaging lens and a detector; a filter wheel is arranged between the fisheye lens and the imaging lens, a plurality of narrow-band filters with different wave bands and zero focal power are arranged on the filter wheel, and the narrow-band filters can be switched to a focal plane of the fisheye lens by the filter wheel; the fisheye lens comprises a negative focal power front lens group and a positive focal power rear lens group, and an aperture diaphragm is arranged on a light path between the front lens group and the rear lens group; the imaging lens comprises a plurality of cemented lenses formed by cementing positive lenses and negative lenses, the absolute value of the relative Abbe number difference of the positive lenses and the negative lenses is more than or equal to 5, and the absolute value of the relative dispersion difference is less than or equal to 0.001.
Description
Technical field
The utility model relates to a kind of airglow imagers, and in particular to a kind of non-focusing all-sky airglow imaging of wide spectrum
Instrument.
Background technique
Airglow is a kind of important natural luminescence phenomenon in terrestrial space environment, is big by the excitation of sun short-wave ultraviolet radiation
The light for certain wavelength that molecular atoms in gas are issued is generally present between the 50-500km of earth overhead, and brightness is very low, point
Cloth is uneven, is not easy to be noticeable, and only very sensitive instrument can just observe.
The room and time of airglow is distributed by a variety of atmospheric dynamics such as tidal wave, atmospheric gravity waves and planetary scale
PROCESS MODULATE is the important tracer of atmospheric dynamics process and atmospheric photochemistry process, in day is accounted in physics research field
There is special status.
As shown in Figure 1 and Figure 2, a kind of existing airglow imager is by fish eye lens 01, diaphragm 02, the first imaging lens 03, filter
The optics such as halo 04 (containing optical filter 041), the second imaging lens 05, ccd detector 06, mechanical focusing device 07 and computer 08
Device composition.
Since the structure of existing imager is higher to the unilateral type quality requirement of filtering, the detecting band range of imager is wide,
There are axial chromatic aberrations for the optical filter of system different-waveband.It will lead to image planes after switching optical filter to shift, influence into image quality
Amount.Therefore it needs to focus after filter wheel 04 switches optical filter 041 using mechanical focusing device 07.But mechanical focusing device
07 structure is complicated, increases the manufacturing cost of imager；And due to every time use filter wheel 04 switch optical filter 041 after, all
It needs to focus to different wave length optical filter 041, causes the use of imager to operate relatively complicated, complicated；Mechanical focusing device 07
It can also happen that failure, influences the image quality of imager, cannot even be imaged.
And the fish eye lens 01 of existing imager be all made of conventional fish eye lens (such as: the fish of Nikon 8mm f/2.8
Glasses head), need to be equipped with additional the first imaging lens of image space telecentricity 03 with match filter 041 to incident ray incident angle
It is required that but the existing this conventional fish eye lens 01 imager wave band that matches imaging lens structure type is relatively narrow and additional
First imaging lens 03 also cause imager structure more complicated.Simultaneously because the finished product fish that the airglow imager of this structure uses
The optical filter 041 smaller thus matched in an image planes aperture of corresponding first imaging lens 03 of glasses head 01 is effectively opposite
Aperture is small, reduces the luminous flux of system, cannot accurately detect faint airglow signal.
Utility model content
That the purpose of the utility model is to overcome existing airglow imager detection viewing fields is small, spectral region is narrow and need to use machine
Tool focus control leads to imager structure and using the disadvantages such as luminous flux complicated for operation and imager is low, provides a kind of width
The non-focusing all-sky airglow imager of spectral coverage.The imager can be economical on the basis of guaranteeing whole system compared with high pass light quantity
The imaging of multichannel all-sky airglow is conveniently realized, realizes the all-sky airglow observation of Beijing of degree of precision.
To achieve the above object, the utility model provides a kind of non-focusing all-sky airglow imager of wide spectrum, special
Place is, including set gradually from left to right along same optical axis image space telecentricity fish eye lens, object space telecentric imaging camera lens and
Detector；
Filter wheel is set between fish eye lens and imaging lens, and filter wheel is equipped with multiple and different wave bands and focal power is zero
Narrow band filter, narrow band filter can switch to fish-eye focal plane by filter wheel；
The fish eye lens includes negative power front lens group and positive light coke rear lens group, front lens group and rear lens group
Between optical path be equipped with aperture diaphragm, aperture diaphragm is located at the front focal plane of rear lens group；The imaging lens include it is multiple by
Gluing mirror made of positive and negative lenses are glued, the opposite Abbe number of positive and negative lenses are denoted as A and B respectively, | A-B | >=
5, the relative dispersion of positive and negative lenses is denoted as C and D respectively, C-D | and≤0.001.The crown that positive lens generally uses Abbe number big
Board glass, the flint glass that negative lens generally uses Abbe number small.
Further, above-mentioned fish-eye rear lens group includes at least one as made of positive and negative lenses gluing
The opposite Abbe number of glued mirror, positive and negative lenses is denoted as a and b respectively, | a-b | >=5, the opposite color of positive and negative lenses
It dissipates and is denoted as c and d respectively, | c-d |≤0.001.Glued mirror is arranged in fish eye lens can be to image planes axial chromatic aberration of fish eye lens
It optimizes, does not change so that switching different filter system totality image qualities at an image planes.
Further, above-mentioned imaging lens include from left to right the first imaging len, third gluing mirror, the 4th glued mirror,
5th glued mirror and the 8th imaging len；Third gluing mirror is formed by biconvex positive lens and double-concave negative lens gluing from left to right,
The material that biconvex positive lens use is H-FK61, and the material that double-concave negative lens use is KF2；4th glued mirror is from left to right by convex
Positive lens towards diaphragm is formed with biconvex positive lens gluing, and the material that positive lens uses is KF2, the material that biconvex positive lens use
Material is H-FK61；5th glued mirror is formed by biconvex positive lens and double-concave negative lens gluing from left to right, and biconvex positive lens use
Material be H-FK61, the material that double-concave negative lens use is KF2.
Further, above-mentioned narrow band filter is glass plate；First imaging len of imaging lens is biconvex positive lens,
8th imaging len is biconvex positive lens；The material that narrow band filter, the first imaging len and the 8th imaging len use is equal
For H-ZLAF92.
Further, above-mentioned fish-eye front lens group includes the first front lens, the second front lens, third from left to right
Front lens, the first glued mirror and the 6th front lens；First glued mirror from left to right from concave surface to the negative lens of diaphragm and biconvex just
Lens gluing forms, and the material that negative lens uses is KF2, and the material that biconvex positive lens use is H-FK61；Rear lens group is from a left side
It include the second glued mirror and third rear lens to the right side；Second glued mirror is glued by double-concave negative lens and biconvex positive lens from left to right
It forms, the material that double-concave negative lens use is KF2, and the material that biconvex positive lens use is H-FK61.
Further, the first front lens of above-mentioned fish eye lens front lens group is negative lens of the concave surface to diaphragm；Before second
Lens are negative lens of the concave surface to diaphragm；Third front lens is the negative lens of the reversed diaphragm in concave surface；6th front lens be biconvex just
Lens；The third rear lens of rear lens group are biconvex positive lens；Before first front lens, the second front lens, third front lens, the 6th
The material that lens use is H-ZLAF92, H-FK61, H-ZF6, H-FK61 respectively；The material that third rear lens use is H-
FK61。
Further, above-mentioned filter wheel includes the narrow band filter that 8 sizes are 4 inches, in 8 narrow band filters
Long cardiac wave is respectively 427.8nm, 557.7nm, 578.0nm, 589.3nm, 598.5nm, 630.0nm, 777.4nm, 865.0nm.
Rotation switching is carried out, it can be achieved that multichannel is observed in turn by the motor drive of filter wheel.
Further, above-mentioned fish-eye focal length is 35.35mm, and F# 10.3, the F# of above-mentioned imaging lens are 2.8, β
It is -0.2721.
Further, 77.9mm is divided between above-mentioned front lens group and rear lens group, between rear lens group and narrow band filter
Between be divided into 123.78mm, between narrow band filter and imaging lens between be divided into 160mm.Before above-mentioned first front lens and second thoroughly
It is divided into 35.42mm between mirror, 97.91mm, third front lens and the first gluing are divided between the second front lens and third front lens
It is divided into 3.13mm between mirror, is divided into 5.38mm between the first glued mirror and the 6th front lens；Second glued mirror and third rear lens
Between be divided into 157.66mm；132.59mm, third gluing mirror and the 4th glue are divided between first imaging len and third gluing mirror
It is divided into 7.46mm between conjunction mirror, 2mm, the 5th glued mirror and the 8th imaging len are divided between the 4th glued mirror and the 5th glued mirror
Between be divided into 5.33mm.Between the surface of the close object space of above-mentioned first front lens and the focal plane of imager optical system away from
From for 1099.42mm.
Further, above-mentioned detector is scientific grade CCD camera.
Compared with prior art, the utility model has the advantages that:
1, the requirement reduced in an image planes to the unilateral type quality that filters is arranged in the utility model narrow band filter；And
The glued mirror of imaging lens chooses specific glass material (such as KF2, H-FK61), in system all band wide spectral range (427.8
~865nm) apochromatism optimization is carried out, the chromatism of position of rim ray is not only eliminated, also the light in full spectral coverage is formed
Apochromatism.High quality imaging is realized, meets the needs of faint airglow radiation detection；Image plane focusing device is eliminated again,
System complexity is reduced, the manufacturing cost of imager has been saved.
2, the utility model uses the fish eye lens of image space telecentricity, and the chief ray of different visual fields can be made all perpendicular to optical filtering
Piece guarantees that view field imaging beam angle is consistent outside with axis on an image planes axis, and then guarantees filter transmission uniformity；Simultaneously
The incident angle of incident ray can also be made to reach the bandwidth requirement of the multiple and different wave band optical filters of filter wheel, can be realized more waves
The multi-channel GPS observations of section.
3, the utility model passes through and simplifies imager system structure, reduces number of lenses and use special image space telecentricity
Fish eye lens increases the aperture of an image planes, so that the effective relative aperture of optical filter is increased, the final light for increasing system
Flux makes imager have higher detectivity.
Detailed description of the invention
Fig. 1 is the system composition schematic diagram of existing airglow imager；
Fig. 2 is the light channel structure schematic diagram of existing airglow imager；
Fig. 3 is the light channel structure schematic diagram of the utility model airglow imager one embodiment；
Fig. 4 is that Fig. 3 implements csr optical system in spatial frequency 371p/mm transmission function figure；
Fig. 5 is the point range figure that Fig. 3 implements csr optical system；
Fig. 6 is the paraxial chromatic curve that Fig. 3 implements csr optical system.
Each label is described as follows in Fig. 1, Fig. 2:
01-fish eye lens, 02-diaphragm, the 03-the first imaging lens, 04-filter wheel, 041-optical filter, 05-the second
Imaging lens, 06-ccd detector, 07-mechanical focusing device, 08-computer；
Each label is described as follows in Fig. 3~Fig. 6:
1-fish eye lens；
11-front lens groups, the 111-the first front lens, the 112-the second front lens, 113-third front lens, 114-the
One glued mirror, the 115-the six front lens, 116-aperture diaphragms；
12-rear lens groups, the 121-the second glued mirror, 122-third rear lens；
2-narrow band filters；
3-imaging lens, the 31-the first imaging len, 32-third gluing mirrors, the 33-the four glued mirror, the 34-the five glue
Close mirror, the 35-the eight imaging len.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
The present embodiment provides a kind of non-focusing all-sky airglow imagers of wide spectrum, including along same optical axis from left to right according to
Image space telecentricity fish eye lens 1, object space telecentric imaging camera lens 3 and the detector (not shown) of secondary setting.Science can be used in detector
Grade CCD camera.
Referring to Fig. 3, filter wheel (not shown) is set between fish eye lens 1 and imaging lens 3, filter wheel is equipped with 8 not
Same wave band, focal power are zero and size is 4 inches of narrow band filter 2, and narrow band filter 2 can be switched to flake by filter wheel
The focal plane of camera lens 1；
Narrow band filter 2 is glass plate, and the material of use is H-ZLAF92.The central wavelength of 8 narrow band filters 2
Respectively 427.8nm, 557.7nm, 578.0nm, 589.3nm, 598.5nm, 630.0nm, 777.4nm, 865.0nm.By filtering
The motor drive of wheel carries out rotation switching, realizes that multichannel is observed in turn.
The corresponding major gaseous component of the detecting band of 8 optical filters and distribution height are as shown in the table.
The rear lens group 12 of fish eye lens 1 includes at least one gluing mirror as made of positive and negative lenses gluing, just
Absolute value >=5 of lens and negative lens with respect to Abbe number difference, and absolute value≤0.001 of relative dispersion difference.The present embodiment
Middle fish eye lens 1 includes negative power front lens group 11 and positive light coke rear lens group 12, front lens group 11 and rear lens group 12
Between optical path be equipped with aperture diaphragm 116, aperture diaphragm 116 is located at the front focal plane of rear lens group 12.Front lens group 11 is main
Bear field angle and back work distance from；Rear lens group 12 belongs to the projection objective to short distance imaging, bears biggish drift angle, mentions
It is balanced for part aberration and the remaining aberration of front lens group 11.
The front lens group 11 of fish eye lens 1 is from left to right including saturating before the first front lens 111, the second front lens 112, third
The glued mirror 114 of mirror 113, first and the 6th front lens 115；First front lens 111 is negative lens of the concave surface to diaphragm, the material of use
Material is H-ZLAF92；Second front lens 112 is negative lens of the concave surface to diaphragm, and the material of use is H-FK61；Third front lens
113 be the negative lens of the reversed diaphragm in concave surface, and the material of use is H-ZF6；First glued mirror 114 is from left to right from concave surface to diaphragm
Negative lens formed with biconvex positive lens gluing, the material that negative lens uses is KF2, and the material that biconvex positive lens use is H-
FK61；6th front lens 115 is biconvex positive lens, and the material of use is H-FK61.
Rear lens group 12 includes the second glued mirror 121 and third rear lens 122 from left to right；Second glued mirror 121 is from a left side
It is formed to the right side by double-concave negative lens and biconvex positive lens gluing, the material that double-concave negative lens use is KF2, and biconvex positive lens use
Material be H-FK61.Third rear lens 122 are biconvex positive lens, and the material of use is H-FK61.
Imaging lens 3 include gluing mirror made of multiple gluings as positive and negative lenses, and positive and negative lenses are opposite
Absolute value >=5 of Abbe number difference, and absolute value≤0.001 of relative dispersion difference.In the present embodiment, imaging lens 3 are from a left side
It include the first imaging len 31, the glued mirror 34 of glued mirror the 33, the 5th of third gluing mirror the 32, the 4th and the 8th imaging len to the right side
35.First imaging len 31 is biconvex positive lens, and the material used is H-ZLAF92；Third gluing mirror 32 is from left to right by biconvex
Positive lens is formed with double-concave negative lens gluing, and the material that biconvex positive lens use is H-FK61, the material that double-concave negative lens use
It is KF2；The positive lens from convex surface to diaphragm forms 4th glued mirror 33 with biconvex positive lens gluing from left to right, and positive lens uses
Material be KF2, the material that biconvex positive lens use is H-FK61；5th glued mirror 34 is from left to right by biconvex positive lens and double
Recessed negative lens gluing forms, and the material that biconvex positive lens use is H-FK61, and the material that double-concave negative lens use is KF2；8th
Imaging len 35 is biconvex positive lens, and the material used is H-ZLAF92.
Incident ray is extracted after fish eye lens 1 reaches the narrow band filter 2 of its focal plane using narrow band filter slice 2
The strength information of the airglow radiation in Middle and upper atmosphere feature height region；All-sky airglow spoke is recorded using highly-sensitive detector
Penetrate intensity distribution image.Image is analyzed by computer, the observation data of airglow height region atmospheric oscillation can be obtained.
The specific structure parameter of the present embodiment imager optical system is detailed in following table.
The F# of the present embodiment imager optical system is 2.8；Focal length is 9.63mm；Image height is 13.824mm, and visual field is
180°；It is 2048 × 2048 that pixel number, which can be adapted to, and pixel dimension is the CCD imager part of 13.5um；Fish-eye focal length
For 35.35mm, F# 10.3.The F# of imaging lens is that 2.8, β is -0.2721.
Referring to fig. 4, system is at spatial frequency 37lp/mm, either sagittal plane (S) or meridional plane (T), MTF
Value is all big by 0.82, close to diffraction limit, has excellent image quality.
Fig. 5 point range figure reflects the size that disc of confusion is imaged in system in image planes.As shown in figure 5, disperse root mean square on axis
Radius is 2.289um, and full filed root mean square radii is 3.613um, and the optical system is in entire field range, image quality point
Cloth is uniform.
As seen from Figure 6, second order spectrum color difference is about 0.048mm, and maximum coke moves five times changed in diffraction limit
Within the scope of, there is lesser maximum burnt shifting, meet second order spectrum requirement, can preferably realize the correction of second order spectrum.
To sum up, this implementation is zero by image space telecentricity fish eye lens, focal power narrow band filter, object space telecentric imaging mirror
Head and tie detector are realized with the radiation of atmosphere airglow as tracer, the imaging observation of all-sky multichannel airglow.
The above is only preferred embodiments of the present invention are described, not by the technical side of the utility model
Case limited to this, those skilled in the art's made any known deformation on the basis of the design of the major technique of the utility model
Belong to the claimed technology scope of the utility model.
Claims (10)
1. a kind of non-focusing all-sky airglow imager of wide spectrum, which is characterized in that including along same optical axis from left to right successively
Image space telecentricity fish eye lens (1), object space telecentric imaging camera lens (3) and the detector of setting；
Filter wheel is set between fish eye lens (1) and imaging lens (3), and filter wheel is equipped with multiple and different wave bands and focal power is
Narrow band filter (2) can be switched to the focal plane of fish eye lens (1) by zero narrow band filter (2), filter wheel；
The fish eye lens (1) includes negative power front lens group (11) and positive light coke rear lens group (12), front lens group
(11) optical path between rear lens group (12) is equipped with aperture diaphragm (116), and aperture diaphragm (116) is located at rear lens group (12)
Front focal plane；
The imaging lens (3) include gluing mirror made of multiple gluings as positive and negative lenses, positive and negative lenses phase
To absolute value >=5 of Abbe number difference, and absolute value≤0.001 of its relative dispersion difference.
2. the non-focusing all-sky airglow imager of a kind of wide spectrum according to claim 1, it is characterised in that: the flake
The rear lens group (12) of camera lens (1) include at least one as positive and negative lenses it is glued made of gluing mirror, positive lens and bear
Absolute value >=5 of the lens with respect to Abbe number difference, and absolute value≤0.001 of its relative dispersion difference.
3. the non-focusing all-sky airglow imager of a kind of wide spectrum according to claim 1 or 2, it is characterised in that: described
Imaging lens (3) include the first imaging len (31), third gluing mirror (32), the 4th glued mirror (33), the 5th glue from left to right
Close mirror (34) and the 8th imaging len (35)；
Third gluing mirror (32) is formed by biconvex positive lens and double-concave negative lens gluing from left to right, the material that biconvex positive lens use
Material is H-FK61, and the material that double-concave negative lens use is KF2；
The positive lens from convex surface to diaphragm forms 4th glued mirror (33) with biconvex positive lens gluing from left to right, and positive lens uses
Material be KF2, the material that biconvex positive lens use is H-FK61；
5th glued mirror (34) is formed by biconvex positive lens and double-concave negative lens gluing from left to right, the material that biconvex positive lens use
Material is H-FK61, and the material that double-concave negative lens use is KF2.
4. the non-focusing all-sky airglow imager of a kind of wide spectrum according to claim 3, it is characterised in that: the narrowband
Optical filter (2) is glass plate；The first imaging len (31) of imaging lens (3) is biconvex positive lens, the 8th imaging len
It (35) is biconvex positive lens；
The material that narrow band filter (2), the first imaging len (31) and the 8th imaging len (35) use is H-ZLAF92.
5. the non-focusing all-sky airglow imager of a kind of wide spectrum according to claim 3, it is characterised in that: the flake
The front lens group (11) of camera lens (1) includes the first front lens (111), the second front lens (112), third front lens from left to right
(113), the first glued mirror (114) and the 6th front lens (115)；
The negative lens from concave surface to diaphragm forms first glued mirror (114) with biconvex positive lens gluing from left to right, and negative lens is adopted
Material is KF2, and the material that biconvex positive lens use is H-FK61；
Rear lens group (12) includes the second glued mirror (121) and third rear lens (122) from left to right；
Second glued mirror (121) is formed by double-concave negative lens and biconvex positive lens gluing from left to right, what double-concave negative lens used
Material is KF2, and the material that biconvex positive lens use is H-FK61.
6. the non-focusing all-sky airglow imager of a kind of wide spectrum according to claim 5, it is characterised in that: the flake
The first front lens (111) of camera lens (1) front lens group (11) is negative lens of the concave surface to diaphragm；Second front lens (112) is recessed
Negative lens towards diaphragm；Third front lens (113) is the negative lens of the reversed diaphragm in concave surface；6th front lens (115) is biconvex
Positive lens；
The third rear lens (122) of rear lens group (12) are biconvex positive lens；
The material that first front lens (111), the second front lens (112), third front lens (113), the 6th front lens (115) use
It is H-ZLAF92, H-FK61, H-ZF6, H-FK61 respectively；The material that third rear lens (122) use is H-FK61.
7. the non-focusing all-sky airglow imager of a kind of wide spectrum according to claim 6, it is characterised in that: the optical filtering
Wheel includes the narrow band filter (2) that 8 sizes are 4 inches, and the central wavelength of 8 narrow band filters (2) is respectively
427.8nm、557.7nm、578.0nm、589.3nm、598.5nm、630.0nm、777.4nm、865.0nm。
8. the non-focusing all-sky airglow imager of a kind of wide spectrum according to claim 7, it is characterised in that: the flake
The focal length of camera lens (1) is 35.35mm, F# 10.3, and it is -0.2721 that the F# of the imaging lens (3), which is 2.8, β,.
9. the non-focusing all-sky airglow imager of a kind of wide spectrum according to claim 8, it is characterised in that: before described thoroughly
It is divided into 77.9mm between microscope group (11) and rear lens group (12),
It is divided into 123.78mm between the rear lens group (12) and narrow band filter (2),
It is divided into 160mm between the narrow band filter (2) and imaging lens,
It is divided into 35.42mm between first front lens (111) and the second front lens (112),
It is divided into 97.91mm between second front lens (112) and third front lens (113),
It is divided into 3.13mm between the third front lens (113) and the first glued mirror (114),
5.38mm is divided between described first glued mirror (114) and the 6th front lens (115)；
157.66mm is divided between described second glued mirror (121) and third rear lens (122)；
It is divided into 132.59mm between first imaging len (31) and third gluing mirror (32),
It is divided into 7.46mm between the third gluing mirror (32) and the 4th glued mirror (33),
It is divided into 2mm between described 4th glued mirror (33) and the 5th glued mirror (34),
5.33mm is divided between described 5th glued mirror (34) and the 8th imaging len (35)；
The distance between the surface of the close object space of first front lens (111) and the focal plane of imager optical system are
1099.42mm。
10. the non-focusing all-sky airglow imager of a kind of wide spectrum according to claim 9, it is characterised in that: the spy
Survey device is scientific grade CCD camera.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109656006A (en) * | 2019-01-04 | 2019-04-19 | 中国科学院西安光学精密机械研究所 | A kind of non-focusing all-sky airglow imager of wide spectrum |
| CN112240801A (en) * | 2020-10-13 | 2021-01-19 | 中国科学院长春光学精密机械与物理研究所 | Polarization imaging system |
-
2019
- 2019-01-04 CN CN201920015700.6U patent/CN209417404U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109656006A (en) * | 2019-01-04 | 2019-04-19 | 中国科学院西安光学精密机械研究所 | A kind of non-focusing all-sky airglow imager of wide spectrum |
| CN109656006B (en) * | 2019-01-04 | 2024-04-09 | 中国科学院西安光学精密机械研究所 | Wide-spectrum non-focusing all-day air bright imager |
| CN112240801A (en) * | 2020-10-13 | 2021-01-19 | 中国科学院长春光学精密机械与物理研究所 | Polarization imaging system |
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