CN110285884B - Optical system of sunlight-induced chlorophyll fluorescence detection hyperspectral imager - Google Patents
Optical system of sunlight-induced chlorophyll fluorescence detection hyperspectral imager Download PDFInfo
- Publication number
- CN110285884B CN110285884B CN201910515293.XA CN201910515293A CN110285884B CN 110285884 B CN110285884 B CN 110285884B CN 201910515293 A CN201910515293 A CN 201910515293A CN 110285884 B CN110285884 B CN 110285884B
- Authority
- CN
- China
- Prior art keywords
- lens
- imaging
- sunlight
- optical system
- pixel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 39
- 229930002875 chlorophyll Natural products 0.000 title claims abstract description 21
- 235000019804 chlorophyll Nutrition 0.000 title claims abstract description 21
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 title claims abstract description 21
- 238000001917 fluorescence detection Methods 0.000 title claims abstract description 9
- 238000003384 imaging method Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000001228 spectrum Methods 0.000 claims abstract description 26
- 230000003595 spectral effect Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 3
- 238000013461 design Methods 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 210000001747 pupil Anatomy 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000004907 flux Effects 0.000 abstract 1
- 238000000701 chemical imaging Methods 0.000 description 8
- 230000004075 alteration Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000002189 fluorescence spectrum Methods 0.000 description 2
- 238000012634 optical imaging Methods 0.000 description 2
- 230000000243 photosynthetic effect Effects 0.000 description 2
- 239000013065 commercial product Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/18—Generating the spectrum; Monochromators using diffraction elements, e.g. grating
- G01J3/1838—Holographic gratings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2823—Imaging spectrometer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/18—Generating the spectrum; Monochromators using diffraction elements, e.g. grating
- G01J2003/1842—Types of grating
- G01J2003/1861—Transmission gratings
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses an optical system of a sunlight-induced chlorophyll fluorescence detection hyperspectral imager, which comprises a telescope, a slit, a collimating lens, a holographic phase transmission grating, a focusing lens and an image plane. The system is an image space telecentric system, the field angle is 20 degrees, and the requirement of general space optical remote sensing can be met; the working wave band is 670nm-780nm, and the main detection window for chlorophyll fluorescence is induced by covering vegetation sunlight; the number F of the system can be set to be 1.8-3 according to different requirements, so that high luminous flux transmission capacity and high signal-to-noise ratio of detection of the system are guaranteed; the pixel spectrum is sampled by 0.05-0.1 nm/pixel, and the spectral resolution of more than 0.3nm can be realized; meanwhile, the method has excellent imaging quality, and can obtain relatively rich sunlight induced chlorophyll fluorescence information of the vegetation.
Description
Technical Field
The invention belongs to the technical field of hyperspectral imaging and the technical field of space optics, and particularly relates to an optical system of a sunlight-induced chlorophyll fluorescence detection hyperspectral imager.
Background
Sunlight induced chlorophyll fluorescence is a direct representation of plant photosynthetic productivity, is called as a probe for plant health condition and photosynthesis, and remote sensing fluorescent signals can directly indicate the plant photosynthetic productivity under the stress-free condition and the degree of the plant stressed by the external environment, so that the sunlight induced chlorophyll fluorescence has very important scientific and application values in vegetation ecological application. Sunlight-induced chlorophyll fluorescence is usually submerged in vegetation canopy reflection signals, the energy of the sunlight-induced chlorophyll fluorescence only accounts for about 1 percent, and in order to accurately separate the fluorescence spectrum information from canopy reflection spectra, an optical remote sensing instrument is required to have ultrahigh spectral resolution and signal-to-noise ratio, and certain imaging resolution capability. These detection and inversion requirements cannot be met by the conventional vegetation optical remote sensing hyperspectral imaging instrument.
The special detection mechanism of sunlight-induced chlorophyll fluorescence requires that a hyperspectral imaging instrument for detection must have sub-nanometer (0.3nm) spectral resolution and ultrahigh signal-to-noise ratio (average 200, maximum 1000) in a fluorescence band (670-. However, an obvious restriction relationship exists between the resolution and the signal-to-noise ratio, and a novel hyperspectral imaging optical system needs to be designed to meet the application requirement.
A sunlight-induced chlorophyll fluorescence detection hyperspectral imager belongs to the emerging technical field, and few mature remote sensing instruments exist. The FLEX (fluorescence explorer) project developed by the European Bureau is the first satellite fluorescent remote sensing load in the future, the field angle of the instrument is 10.8 degrees, the ground pixel spatial resolution is 0.75mrad, the working waveband of 500-. Minimum signal-to-noise ratio 115 and maximum signal-to-noise ratio 1015 under different observation modes. This load is expected to be emitted in 2022 applications. Plant Fluorescence spectrum Imager (Aisai IS Fluorescence Imager) of SPECIM corporation of Finland is the only commercial product on the market. As the only sunlight induced chlorophyll fluorescence spectral imaging detector in the market at present, the working waveband covers the visible-near infrared waveband of 670-780nm, the spectral sampling interval is 0.11nm, the minimum spectral resolution is 0.33nm, the instrument field angle is 32.3 degrees, the spatial resolution is 1.5mrad, and the minimum signal-to-noise ratio is higher than 100. At present, the development of instruments in the field is in the development stage in China, and no mature product and no remote sensing instrument are applied.
The hyperspectral imaging detector meeting the requirement of sunlight-induced chlorophyll fluorescence detection is an important means in future vegetation ecological remote sensing application, and the research and development technology of the detector mainly focuses on realizing ultrahigh spectral resolution, high signal-to-noise ratio and good optical imaging capability of the detector.
Compared with the Chinese patent 201811012191.8, the invention has the following differences:
(1) the invention is a perfect optical system of a vegetation sunlight induced chlorophyll fluorescence hyper-spectral imager, which comprises a telescope and an imaging spectrometer, and can realize perfect imaging capability from infinity to near, while the optical system of patent 201811012191.8 does not have the imaging capability;
(2) patent 201811012191.8 discloses that the aperture diaphragm is on the grating, and the optical path is nearly telecentric on the object side; the aperture diaphragm is arranged in the telescope, the whole system realizes more perfect image space telecentricity, the design modes and forms of a collimating lens group and a focusing lens group of the imaging spectrum system are changed due to the change of the aperture diaphragm, and the types and the curvature radiuses of the lenses formed by the aperture diaphragm are completely different from those of patent 201811012191.8;
(3) the invention definitely uses a holographic phase transmission grating, and the patent 201811012191.8 uses a general transmission grating, which has greatly different diffraction efficiency, blazed wavelength and diffraction capability.
Disclosure of Invention
In order to break through foreign technology blockade and break through key technology development of a sunlight-induced chlorophyll fluorescence detection hyperspectral imager, the invention aims to: on the premise of ensuring telecentricity, flat image field and approaching diffraction limit, the design of the optical system of the imaging spectrometer with ultrahigh spectral resolution is provided, the system works in a 670nm-780nm waveband, the field angle is 20 degrees, pixel spectrum sampling is 0.05-0.1 nm/pixel, the spectral resolution is better than 0.3nm, the spatial resolution is 1mrad, the imaging quality is close to the diffraction limit, the imaging observation can be carried out on targets at positions infinitely far to 1m, the overall transmission efficiency is over 50 percent, the F number is 1.8-3, and the extremely high signal-to-noise ratio can be realized.
The technical scheme adopted by the invention is as follows:
sunlight-induced chlorophyll fluorescence detection hyperspectral imager optical system includes: the holographic optical system comprises a window 1, a first lens 2, a second lens 3, a third lens 4, an aperture stop 5, a fourth lens 6, a fifth lens 7, a sixth lens 8, a seventh lens 9, an eighth lens 10, a slit 11, a ninth lens 12, a tenth lens 13, an eleventh lens 14, a twelfth lens 15, a thirteenth lens 16, a fourteenth lens 17, a holographic phase-transmission grating 18, a fifteenth lens 19, a sixteenth lens 20, a seventeenth lens 21, an eighteenth lens 22, a nineteenth lens 23, a twentieth lens 24 and an image plane 25. The telescope consists of the window 1, the first lens 2, the second lens 3, the third lens 4, the aperture diaphragm 5, the fourth lens 6, the fifth lens 7, the sixth lens 8, the seventh lens 9 and the eighth lens 10, and is telecentric on the image side; the slit 11, the ninth lens 12, the tenth lens 13, the eleventh lens 14, the twelfth lens 15, the thirteenth lens 16 and the fourteenth lens 17 form a collimating lens group of the imaging spectrum system; the fifteenth lens 19, the sixteenth lens 20, the seventeenth lens 21, the eighteenth lens 22, the nineteenth lens 23 and the twentieth lens 24 form a focusing lens group of the imaging spectrum system; the collimating lens group projects emergent light of the slit 11 on the holographic phase-position transmission grating 18, the scribing density of the holographic phase-position transmission grating 18 is 1200 lines/mm, collimated light of the collimating lens group can be aligned for light splitting, and continuous dispersion spectrum imaging is formed by the focusing lens group and projected on an image surface 25. The collimating lens group, the holographic phase-position transmission grating 18 and the focusing lens group which are sequentially arranged form an imaging spectrum system, and the imaging spectrum system is telecentric on the object side.
The working waveband of the optical system is 670-780nm, the F number is 1.8-3, the pixel spectrum sampling is 0.05-0.1 nm/pixel, the imaging quality is close to the diffraction limit, and the overall transmission efficiency is over 50%.
The invention has the beneficial effects that: the design of the optical system of the hyperspectral imager for sunlight-induced chlorophyll fluorescence passive detection is realized for the first time in China. The field angle of the system reaches 20 degrees, the field range of general space optical application can be met, the width of a picture observed by an instrument on the ground is ensured, and richer vegetation ecological environment information can be obtained; the whole system is a telecentric system and is provided with a real entrance pupil, so that the application of various incident beam limiting devices can be ensured; the number of the optical system F is extremely small, the transmission efficiency of each optical element at 670-780nm can reach more than 98%, and the diffraction efficiency of the holographic phase-position transmission grating in the wave band can reach more than 70%, so that the energy transmission efficiency of the optical system can reach more than 56%, and the extremely high signal-to-noise ratio can be realized; the sampling rate of the pixel spectrum on the final image plane of the optical system design is 0.05-0.1 nm/pixel, and the spectral resolution superior to 0.3nm is realized by using multi-pixel combination; all components in the system are spherical lenses, so that the system is easy to process, has loose tolerance and is beneficial to assembly.
Drawings
FIG. 1 is a schematic diagram of an optical system of a sunlight-induced chlorophyll fluorescence hyperspectral imager.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The invention belongs to the technical field of hyperspectral imaging and the technical field of space optics, and relates to a hyperspectral imaging optical system special for vegetation sunlight induced chlorophyll fluorescence passive remote sensing. The invention is implemented in the structure shown in fig. 1, the components of which include: the holographic optical system comprises a window 1, a first lens 2, a second lens 3, a third lens 4, an aperture stop 5, a fourth lens 6, a fifth lens 7, a sixth lens 8, a seventh lens 9, an eighth lens 10, a slit 11, a ninth lens 12, a tenth lens 13, an eleventh lens 14, a twelfth lens 15, a thirteenth lens 16, a fourteenth lens 17, a holographic phase-transmission grating 18, a fifteenth lens 19, a sixteenth lens 20, a seventeenth lens 21, an eighteenth lens 22, a nineteenth lens 23, a twentieth lens 24 and an image plane 25. The telescope consists of the window 1, the first lens 2, the second lens 3, the third lens 4, the aperture diaphragm 5, the fourth lens 6, the fifth lens 7, the sixth lens 8, the seventh lens 9 and the eighth lens 10, and is telecentric on the image side; the slit 11, the ninth lens 12, the tenth lens 13, the eleventh lens 14, the twelfth lens 15, the thirteenth lens 16 and the fourteenth lens 17 form a collimating lens group of the imaging spectrum system; the fifteenth lens 19, the sixteenth lens 20, the seventeenth lens 21, the eighteenth lens 22, the nineteenth lens 23 and the twentieth lens 24 form a focusing lens group of the imaging spectrum system; the collimating lens group projects emergent light of the slit 11 on the holographic phase-position transmission grating 18, the scribing density of the holographic phase-position transmission grating 18 is 1200 lines/mm, collimated light of the collimating lens group can be aligned for light splitting, and continuous dispersion spectrum imaging is formed by the focusing lens group and projected on an image surface 25. The collimating lens group, the holographic phase transmission grating 18 and the focusing lens group which are arranged in sequence form an imaging spectrum system,
the invention designs each component element in the system by researching the imaging spectrometer aberration theory and analyzing the system focal power distribution. The working wave band of the system is narrow, and if a reflective system is adopted, the requirements of large visual field, small F number and high optical imaging capability are difficult, the cost is high, and the processing, the assembly and the adjustment are difficult, so that the configuration of the optical system adopts a transmission system.
In the design of a telescope, the effective butt joint with a rear-end spectrometer is ensured by adopting an image space telecentric design, meanwhile, the accurate imaging of any long distance is ensured, the field angle is 20 degrees, a double-Gaussian structure is used as an initial prototype structure, the lens material in the double-Gaussian structure is changed into common optical glass, the focal power invariant principle is used for disassembling and analyzing a rear-end lens group, and finally, the optimized front telescope system is obtained. Wherein the lenses 6 and 7 are a cemented lens group, and the lenses 9 and 10 are a cemented lens group. The focal length of the telescope is 31.2mm, and the length of the corresponding slit 11 is 11 mm.
The number of detector pixels adopted by the optical system is 2048 multiplied by 2048, the pixel size is 11 microns, the slit width of the imaging spectrum system is set to be 0.033mm, and the magnification of the imaging spectrum system is 1:1, so that the slits correspond to the sizes of three pixels. The numerical aperture of the system is matched with the F number of the front telescope system, the system adopts a holographic phase transmission grating, the diffraction efficiency exceeds 70 percent, and the energy collection efficiency and the signal-to-noise ratio of the system can be fully ensured. And setting the spectral sampling frequency of the pixel on the image surface 25 to be 0.05-0.1 nm/pixel according to the spectral resolution requirement, and calculating the minimum focal length of a collimating lens group and a focusing lens group of the imaging spectrum system to be 240mm according to the spectral resolution requirement, wherein the grating line density is 1200 lines/mm. In order to simplify the design difficulty, the transmission grating 18 is set as a plane transmission mirror during the initial design, and a collimating mirror group and a focusing mirror group of the design system are designed as symmetrical structures in form, so that the initial good imaging effect is obtained; and then, the plane transmission lens is changed into grating parameters required by design, and the optical parameters of each element in the focusing lens group are properly adjusted, so that the imaging spectrum optical system with excellent imaging quality is designed. The initial basic systems of the collimating lens and the focusing lens are also of a double-Gaussian structure, but the aperture diaphragm is arranged on the grating, the focal power of the system is redistributed through optimization of material change, curvature radius change and the like, the high-order aberration amount and the chromatic aberration of the system are corrected, and the optimization of the image quality is realized.
The cost, material performance and assembly precision of an optical system of the imaging spectrometer are comprehensively considered, and the optical optimization parameters are given in the table 1 by combining the consideration of the practical applicability of engineering.
TABLE 1 Hyperspectral imager optical element parameters
Claims (1)
1. The optical system of the sunlight-induced chlorophyll fluorescence detection hyperspectral imager is characterized by comprising a window (1), a first lens (2), a second lens (3), a third lens (4), an aperture diaphragm (5), a fourth lens (6), a fifth lens (7), a sixth lens (8), a seventh lens (9), an eighth lens (10), a slit (11), a ninth lens (12), a tenth lens (13), an eleventh lens (14), a twelfth lens (15), a thirteenth lens (16), a fourteenth lens (17), a holographic body phase transmission grating (18), a fifteenth lens (19), a sixteenth lens (20), a seventeenth lens (21), an eighteenth lens (22), a nineteenth lens (23), a twentieth lens (24) and an image plane (25), wherein the window (1), the first lens (2), the aperture diaphragm (5), the aperture diaphragm (6), the fifth lens (7), the sixth lens (8), the seventh lens (9), the eighth lens (10), the slit (11, The second lens (3), the third lens (4), the aperture diaphragm (5), the fourth lens (6), the fifth lens (7), the sixth lens (8), the seventh lens (9) and the eighth lens (10) are sequentially arranged to form a telescope, and the telescope is telecentric on the image side; the slit (11), the ninth lens (12), the tenth lens (13), the eleventh lens (14), the twelfth lens (15), the thirteenth lens (16) and the fourteenth lens (17) are sequentially arranged to form a collimating lens group of the imaging spectrum system; a fifteenth lens (19), a sixteenth lens (20), a seventeenth lens (21), an eighteenth lens (22), a nineteenth lens (23) and a twentieth lens (24) are sequentially arranged to form a focusing lens group of the imaging spectrum system; emergent light of the slit (11) is projected on the holographic phase-position transmission grating (18) by the collimating lens group, the scribing density of the holographic phase-position transmission grating (18) is 1200 lines/mm, the collimated light of the collimating lens group can be aligned for light splitting, continuous dispersion spectrum imaging is formed by the focusing lens group and projected on an image surface (25), the collimating lens group, the holographic phase-position transmission grating (18) and the focusing lens group which are sequentially arranged form an imaging spectrum system, and the imaging spectrum system is telecentric at the object space;
TABLE 1 Hyperspectral imager optical element parameters
The working waveband of the optical system is 670nm-780nm, the F number is 1.8-3, the pixel spectrum sampling is 0.05-0.1 nm/pixel, and the imaging quality is close to the diffraction limit;
the field angle of the system reaches 20 degrees, the field range of general space optical application can be met, the width of a picture observed by an instrument on the ground is ensured, and richer vegetation ecological environment information can be obtained; the whole system is a telecentric system and is provided with a real entrance pupil, so that the application of various incident beam limiting devices can be ensured; the number of the optical system F is extremely small, the transmission efficiency of each optical element at 670-780nm can reach more than 98%, and the diffraction efficiency of the holographic phase-position transmission grating in the wave band can reach more than 70%, so that the energy transmission efficiency of the optical system can reach more than 56%, and the extremely high signal-to-noise ratio can be realized; the sampling rate of the pixel spectrum on the final image plane of the optical system design is 0.05-0.1 nm/pixel, and the spectral resolution superior to 0.3nm is realized by using multi-pixel combination; all components in the system are spherical lenses, so that the system is easy to process, has loose tolerance and is beneficial to assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515293.XA CN110285884B (en) | 2019-06-14 | 2019-06-14 | Optical system of sunlight-induced chlorophyll fluorescence detection hyperspectral imager |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515293.XA CN110285884B (en) | 2019-06-14 | 2019-06-14 | Optical system of sunlight-induced chlorophyll fluorescence detection hyperspectral imager |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110285884A CN110285884A (en) | 2019-09-27 |
| CN110285884B true CN110285884B (en) | 2021-07-13 |
Family
ID=68004173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910515293.XA Active CN110285884B (en) | 2019-06-14 | 2019-06-14 | Optical system of sunlight-induced chlorophyll fluorescence detection hyperspectral imager |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110285884B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013955B (en) * | 2020-09-10 | 2023-04-14 | 中北大学 | Spectral imaging method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252756A (en) * | 2011-05-03 | 2011-11-23 | 中国科学院合肥物质科学研究院 | Front-mounted optical system of satellite-borne differential absorption spectrometer |
| CN105136294A (en) * | 2015-08-21 | 2015-12-09 | 中国科学院长春光学精密机械与物理研究所 | Foundation visible high spectral resolution moon observation system |
| CN108896175A (en) * | 2018-08-31 | 2018-11-27 | 中国科学院合肥物质科学研究院 | A kind of high-resolution for vegetation week fluorescent passive detection, high-NA imaging spectrometer |
-
2019
- 2019-06-14 CN CN201910515293.XA patent/CN110285884B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252756A (en) * | 2011-05-03 | 2011-11-23 | 中国科学院合肥物质科学研究院 | Front-mounted optical system of satellite-borne differential absorption spectrometer |
| CN105136294A (en) * | 2015-08-21 | 2015-12-09 | 中国科学院长春光学精密机械与物理研究所 | Foundation visible high spectral resolution moon observation system |
| CN108896175A (en) * | 2018-08-31 | 2018-11-27 | 中国科学院合肥物质科学研究院 | A kind of high-resolution for vegetation week fluorescent passive detection, high-NA imaging spectrometer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110285884A (en) | 2019-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108693634B (en) | Wide-spectrum common-aperture television, infrared zooming imaging and laser tracking guiding optical system | |
| US9823451B2 (en) | Infrared refractive objective lens assembly | |
| US9689744B2 (en) | Visible-infrared plane grating imaging spectrometer | |
| CN101377569B (en) | Prism-grating-prism imaging system | |
| CN106017676A (en) | Infrared imaging spectral measurement system based on gradual filter | |
| CN103389159B (en) | Prism and grating cascading dispersion two-channel and high-resolution spectrum imaging system | |
| CN102519595A (en) | Optical system of satellite-borne differential absorption spectrometer | |
| CN204964018U (en) | Can realize super high spectral resolution's spectrum splitting system | |
| CN207280591U (en) | Double entrance slit high-resolution imaging spectroscopic systems | |
| CN103411670B (en) | A kind of Novel prism dispersion imaging spectrometer | |
| CN108489611B (en) | Multi-slit prism dispersion spectrometer system | |
| CN102519593A (en) | Optical system for super-wide-angle short wave infrared push-broom hyperspectral imager | |
| CN105548032A (en) | Compact high-resolution wide-view-field spectral imaging system | |
| CN114440772B (en) | Blazed transmission grating type spectrometer | |
| CN108896175B (en) | High-resolution and high-numerical-aperture imaging spectrometer for vegetation weak fluorescence passive detection | |
| CN110285884B (en) | Optical system of sunlight-induced chlorophyll fluorescence detection hyperspectral imager | |
| CN204964019U (en) | Long wave infrared imaging spectrometer optical system | |
| CN105181136A (en) | Long-wave infrared imaging spectrometer optical system | |
| KR101176884B1 (en) | Optical system for spectrometer and spectrometer using the same | |
| CN112763065A (en) | Three-branch large-field PGP imaging spectrometer | |
| CN110081976A (en) | A kind of big visual field grating prism spectrum imaging system | |
| CN219455309U (en) | Spectral imaging system suitable for snapshot imaging spectrometer | |
| CN221037678U (en) | Imaging spectrometer optical system based on dichroic prism | |
| CN219142017U (en) | Snapshot prism type spectroscopic imaging system | |
| CN217483671U (en) | Beam splitting imaging system based on free-form surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |