CN109489817A - A kind of optical system of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum - Google Patents
A kind of optical system of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum Download PDFInfo
- Publication number
- CN109489817A CN109489817A CN201811351191.0A CN201811351191A CN109489817A CN 109489817 A CN109489817 A CN 109489817A CN 201811351191 A CN201811351191 A CN 201811351191A CN 109489817 A CN109489817 A CN 109489817A
- Authority
- CN
- China
- Prior art keywords
- channel
- ultraviolet
- section
- preposition
- imaging system
- 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.)
- Pending
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 120
- 230000003287 optical effect Effects 0.000 title claims abstract description 80
- 238000001228 spectrum Methods 0.000 title claims abstract description 78
- 230000000007 visual effect Effects 0.000 title claims abstract description 34
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 19
- 230000003595 spectral effect Effects 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims description 19
- 238000013461 design Methods 0.000 claims description 15
- 230000004075 alteration Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 230000007306 turnover Effects 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 5
- 230000011514 reflex Effects 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- 239000005350 fused silica glass Substances 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 239000005304 optical glass Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 description 11
- 238000001514 detection method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- VMXUWOKSQNHOCA-UKTHLTGXSA-N ranitidine Chemical compound [O-][N+](=O)\C=C(/NC)NCCSCC1=CC=C(CN(C)C)O1 VMXUWOKSQNHOCA-UKTHLTGXSA-N 0.000 description 3
- 238000010408 sweeping Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004304 visual acuity Effects 0.000 description 2
- 229910003978 SiClx Inorganic materials 0.000 description 1
- 239000006094 Zerodur Substances 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000701 chemical imaging Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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
- G01J3/28—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
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The invention discloses a kind of optical system of big airborne Difference Absorption imaging spectrometer of visual field wide spectrum, including preposition look in the distance imaging system and Offner-Littrow spectrum imaging system, preposition imaging system of looking in the distance mainly is made of preposition ultraviolet object lens camera lens；Offner-Littrow spectrum imaging system is specifically made of optical filter, entrance slit, convex grating and concave mirror；Preposition ultraviolet object lens camera lens is made of three independent preposition camera lenses respectively according to detecting band (200-276nm, 276-380nm, 380-500nm), and the field range of each camera lens reaches 40 °.Offner-Littrow spectrum imaging system is also independently made of three spectrometers according to above-mentioned wave band.Each band of light enters entrance spectrometer slit from preposition lens focus, the spectrum that three groups of needs detect is entered into spectrometer by entrance spectrometer slit rear end optical filter, corresponding spectral information is after concave mirror reflects, it is divided again by convex grating, optical path focuses on detector after transferring to concave mirror.The present invention guarantees measurement accuracy, makes overall optical system volume compact.
Description
Technical field
The invention belongs to a kind of measuring method field, it is particularly a kind of collect, convergence earth's surface and sky are ultraviolet, can
The optical system for seeing the airborne Difference Absorption imaging spectrometer of scattering light, is mainly used in the Difference Absorption light of airborne platform
Spectrometer detection looks in the distance imaging system and spectrum imaging system two parts form by preposition.
Background technique
Ultraviolet EO-1 hyperion airborne imaging spectrum instrument parses trace by the ultraviolet radiation of the reflection of detection ground surface, scattering
Polluted gas ingredient NO2、SO2、O3Deng distribution and variation, optical system detecting light spectrum range 200nm~500nm, visual field is
40°.Imaging spectrometer technical solution must carry out synthesis in application demand, the airborne resource and technical capability etc. of can provide
Engineering Tradeoffs, preferably optical texture.The ground of high-resolution image spectrometer and spectral resolution are all very high, and the time of integration is short,
Focal plane device receive radiation energy it is weak, this be comparison techniques scheme, preferably optical texture when Engineering Tradeoffs consider emphasis.
Scattering light from earth's surface assembles the entrance slit for entering spectrometer by preposition telescope lens, utilizes
The dispersion of Offner-Littrow imaging spectrometer is simultaneously imaged onto each planar array detector.The row of photosurface claims empty to slit is parallel to
Between tie up, be the picture of one spectral band of atural object band on every quick face element of a line horizon light；The column of photosurface claim to being dispersion direction
Spectrum is tieed up, and is the picture of one spatial sampling visual field (pixel) spectral dispersion of atural object band on each photosensitive face element of column.In this way, face battle array
The every frame image data of detector is exactly the spectroscopic data of a vertical flight direction atural object band, in addition the fortune in flying platform direction
It is dynamic, with the continuous spectra re-recorded image of given pace, just obtain the spectroscopic data of each pixel in ground two-dimensional image.Optical signal passes through
Detector carries out photoelectric conversion, is amplified by signal processing circuit, direct current recovery, filtering, believes simulation by converter
Number digital signal is converted to, to obtain the spectral information of EO-1 hyperion, high spatial resolution.
In order to match with the pupil of Offner-Littrow spectrum imaging system, preposition optical system must have image space
The structure of telecentricity, and within the scope of broadband system resolving power it is higher.The spatial resolution of airborne imaging spectrum instrument is by preposition
Optical system selects different preposition optical systems according to different application purposes come what is determined, normally due to our surveyed waves
Section includes ultraviolet band, is limited by uviol material, considers reflective structure.Autocollimator is applicable in wide spectrum, but difficult
To realize big visual field, and processing adjustment is complex, and volume is larger, and cost is excessively high.If reflective preposition telescopic system needs reality
Now big visual field often needs to increase movement sweeping mechanism, but is not suitable for minitype airborne platform.And airborne push-broom type imaging spectrometer
Using transmission type optical system, relatively large visual field and aperture can be obtained.
Airborne imaging spectrum instrument has several types at present: one is being based on reflective or transmission-type plane grating, in addition one
Kind is based on Offner system.The image light spectrometer of flat field concave reflection grating based on aberration correction, since visual field is small and
Spectrum image quality is uneven, is difficult to be used.Image light spectrometer based on plane grating must have a colimated light system and optically focused
System.It this is because the light beam for being incident on plane grating must be collimation, and is also quasi- from the light that plane grating diffraction comes out
Straight.To improve spectrum image quality, often more complicatedization, these optical systems increase light energy loss for collimation and condenser system
Add, spectral image is commonly present from colimated light system and focusing system bring residual aberration, direction in space and spectrum directional resolution
Low, image quality is difficult to improve.And entirety difficulty of assembling and debugging is big, and cost is high.
Offner imaging system can in very big field range to all wavelengths at perfect picture.In Offner imaging system
Convex reflecting mirror be changed to convex grating, just at Offner imaging spectrometer.Concave mirror in Offner imaging spectrometer
It can be one, be also possible to two, and there is different radius of curvature.Convex grating can be the Rowland grating on convex surface,
It is also possible to the aberration correction grating on convex surface.These design parameters will according to the made aberration correction situation of optical system related request and
It is fixed.Convex grating Offner structure imaging spectrometer has preferable resolution ratio in spatially and spectrally direction, is widely used to
Low dispersion, big visual field image spectroscope in.- 1 grade of diffraction is often used to be imaged.It is longer when the fringe number increase of grating
The diffraction light of wavelength X 1 stopped after the second secondary reflection of concave mirror by convex grating, therefore the dispersion of grating cannot mistake
Greatly.If on the other hand the fringe number of grating is sufficiently large, diffraction light is set to be directed upwardly toward concave mirror, which forms Offner-
Littrow form.Because convex grating fringe number is high, dispersion is big, this provides possibility for the system of the high dispersion of needs.In early days
Offner convex grating spectrum imaging system mainly limited by the difficulty of processing of convex grating, in recent years electronics beam ion carve
The progress of erosion technology makes it possible to scribe high-performance convex grating solve the pass of the convex grating spectrum imaging system of Offner
Key technology is used practically the convex grating spectrum imaging system of Offner.
Summary of the invention
The technical problem to be solved in the present invention are as follows: overcome the shortage of prior art, a kind of big airborne difference of visual field wide spectrum is provided
Divide the optical system for absorbing imaging spectrometer, by difference absorption spectrum technology, anti-long distance transmission-type imaging technique, Offner-
Littrow spectral imaging technology combines.And effectively by multichannel import optical system and Offner-Littrow spectrometer
It is combined, to realize the wide spectrum Detection Techniques in ultraviolet channel and visible channel, solves airborne imaging spectrum instrument spectrum point
Resolution and spatial resolution are relatively low, ultraviolet band detection channels are less, imaging spectrometer system visual field is too small, optical system overall
The problems such as volume is bigger than normal, weight is laid particular stress on.
The present invention solves the technical solution that above-mentioned technical problem uses are as follows: a kind of big airborne Difference Absorption of visual field wide spectrum at
As the optical system of spectrometer, the optical system includes preposition imaging system and the Offner-Littrow light spectrum image-forming of looking in the distance
System；The preposition imaging system of looking in the distance is three spectrum channels, i.e. first passage according to detecting light spectrum (200-500) nm points
(200-276) nm, second channel (276-380) nm, third channel (380-500) nm, preposition imaging system of looking in the distance includes: first
The preposition imaging system of looking in the distance in channel is specifically by first window, the first eyeglass of first passage, first passage aperture diaphragm, first passage
Second eyeglass, first passage third eyeglass, the 4th eyeglass of first passage, the 5th eyeglass of first passage composition, second channel are preposition
Imaging system of looking in the distance is specifically by the second window, the first eyeglass of second channel, second channel aperture diaphragm, the second mirror of second channel
Piece, second channel third eyeglass, the 4th eyeglass of second channel, the 5th eyeglass of second channel composition, third channel is preposition to look in the distance into
As system is specifically by third window, the first eyeglass of third channel, third channel aperture diaphragm, the second eyeglass of third channel, third
Channel third eyeglass, the 4th eyeglass of third channel, the 5th eyeglass of third channel composition, the Offner-Littrow light spectrum image-forming
System and the corresponding spectral coverage matching of preposition imaging system of looking in the distance are also divided into three channels, i.e. (200-276) nm in I channel, Section II
Channel (276-380) nm, Section III channel (380-500) nm, specifically include the Offner-Littrow light spectrum image-forming in I channel
System is by I channel entrance slit, I channel filter, I channel concave mirror, I channel convex grating, I channel
The Offner-Littrow spectrum imaging system of detector composition, Section II channel is filtered by Section II channel entrance slit, Section II channel
Mating plate, Section II channel concave mirror, Section II channel convex grating, Section II channel detector composition, Section III channel
Offner-Littrow spectrum imaging system is anti-by Section III channel entrance slit, Section III channel filter, Section III channel concave surface
Mirror, Section III channel convex grating, Section III channel detector composition are penetrated, object is that the light of 200-500nm wave band is logical from first
At road first window, at the second window of second channel, third channel third window incidence form the wave band in three channels, range point
It is not the first ultraviolet channel (200nm~276nm), the second ultraviolet channel (276nm~380nm), third ultraviolet/visible light channel
(380nm~500nm)；Wherein the light of 200nm~276nm wave band forms first by the preposition imaging system of looking in the distance of first passage
Ultraviolet channel；Corresponding optical information focuses at the entrance slit of subsequent Offner-Littrow spectrometer Section II channel, and 276nm~
After the light of 380nm wave band is through the preposition imaging system of looking in the distance of second channel, the second ultraviolet channel, 380nm~500nm wave are formed
Section light by third channel it is preposition look in the distance imaging system formed third it is ultraviolet/viewability channel；Corresponding optical information focuses on
At the entrance slit of subsequent Offner-Littrow spectrometer Section III channel；
First ultraviolet channel (200nm~276nm) wave band optical information filters from I channel entrance slit by the 1st channel
Piece enters Offner-Littrow imaging spectrometer system, reflexes to I channel convex grating by I channel concave mirror,
After light splitting at turnover to I channel concave mirror, focus on the detector in I channel；Second ultraviolet channel (276nm~
380nm) wave band optical information enters spectrometer by Section II channel filter from Section II channel entrance slit, by Section II channel concave surface
Reflecting mirror reflexes to Section II channel convex grating, after light splitting at turnover to Section II channel concave mirror, focuses on Section II channel
On detector；Third channel ultraviolet/visible light channel (380nm~500nm) wave band optical information is passed through from Section III channel entrance slit
It crosses Section III channel filter and enters spectrometer, Section III channel convex grating is reflexed to by Section III channel concave mirror, be divided
After transfer to the concave mirror of Section III channel, focus on Section III channel detector.
Wherein, it is described it is preposition look in the distance imaging system according to three wave bands (200nm~276nm), (276nm~380nm),
(380nm~500nm) carries out preposition telephotolens design, specially the first ultraviolet object lens, the second ultraviolet object lens and third respectively
Ultraviolet object lens, the preposition telephotolens in three channels design 40 ° of visual field, 15 ㎜ of focal length, 22 ㎜ of rear cut-off distance, and structure type uses
Anti- long distance structure, ultraviolet object lens are made of the negative, positive light group separated, close to object space light group have negative power, referred to as before
Group has a positive light coke close to the light group of slit, referred to as after group, the wherein aperture of the aperture diaphragm of first passage, second channel
Diaphragm, third channel aperture diaphragm be separately positioned on rear group of front end of the preposition ultraviolet object lens in respective channel.
Wherein, the preposition imaging system of looking in the distance: the first ultraviolet object lens, the second ultraviolet object lens and third ultraviolet object lens difference
It is made of front group and rear group, wherein the design of preceding group is made of 1 negative lens, rear group is designed as four mirrors compositions, wherein the
One ultraviolet object lens, the second ultraviolet object lens lens materials be ultraviolet band transmitance good material composition, be here calcirm-fluoride
And fused silica material, the lens materials of third ultraviolet object lens are calcirm-fluoride and F2, rear group of eyeglass third of third ultraviolet object lens
The 4th eyeglass of channel, the 5th eyeglass of third channel are formed using gluing technique.
Wherein, preposition imaging system design of looking in the distance must meet the following requirement: 1. have telecentric structure；2. with rear end
The convex grating splitting system numerical aperture of spectrum imaging system matches.
Wherein, the described first ultraviolet channel I channel convex grating, the second ultraviolet channel Section II channel convex grating,
Three ultraviolet/viewability channel Section III channel convex gratings can be the Rowland grating on convex surface, be also possible to the aberration school on convex surface
Positive grating.
Wherein, the described first ultraviolet channel I channel concave mirror, the second ultraviolet channel Section II channel concave reflection
Mirror, third be ultraviolet/and viewability channel Section III channel concave mirror is all made of ULE optical glass.
Wherein, first ultraviolet object lens, the second ultraviolet object lens, third ultraviolet object lens respectively 200~276nm, 276~
380nm, 380~500nm wave band plate ultraviolet anti-reflection film；It is first ultraviolet channel lens object space front end first window, second ultraviolet logical
The second window of road lens object space front end, third be ultraviolet/viewability channel lens object space front end third window plate respectively 200~276nm,
276~380nm, 380~500nm wave band bandpass filters；It is first ultraviolet channel I channel concave mirror, second ultraviolet logical
Road Section II channel concave mirror, third be ultraviolet/and viewability channel Section III channel concave mirror plates respective channel wave band respectively
Reflect aluminium film；Wherein the first ultraviolet channel I channel filter, the second ultraviolet channel Section II channel filter, third it is ultraviolet/can
See that channel Section III channel filter plates 200~276nm, 276~380nm, 380~500nm bandpass filters respectively.
The principle of the present invention includes two large divisions: preposition imaging system and the Offner-Littrow imaging spectrometer system of looking in the distance
System；The preposition imaging optical system of looking in the distance is divided into three-passage design, channel 1 (200-276) nm, channel 2 according to detecting band
(276-380) nm, channel 3 (380-500) nm, are made of preposition ultraviolet object lens and window；The Offner-Littrow imaging
Spectrometer optical system is made of entrance slit, optical filter, convex grating and concave mirror and detector；It is described preposition to look in the distance
Institute detecting band (200nm~500nm) is divided by optical system using triple channel ultraviolet object lens, and it is logical to form three detections
Road, the light of detecting objects pass through the ultraviolet object lens of window and respective channel, the spectral information in respective channel are respectively focused on
At the entrance slit of Offner-Littrow imaging spectrometer system, by the radius of curvature, the purple that control each eyeglass of ultraviolet object lens
Outer lens front group, the spacing organized afterwards, and be imaged with the spacing of entrance spectrometer slit to ensure to enter Offner-Littrow
There is good image quality at entrance spectrometer slit；The light of each band class information is incident from Offner-Littrow imaging spectrometer system
Slit enters, by focusing on phase after concave mirror is reflected into convex grating light splitting, then through concave mirror after optical filter
It answers on channel detector.
The advantages of the present invention over the prior art are that:
(1) optical system radiation energy utilization efficiency of the invention is high.The present invention is in the numerical aperture for improving imaging spectrometer
Diameter avoids generating vignetting simultaneously, and preposition telescopic system design has telecentric structure and convex grating splitting system numerical aperture
Diameter matches and has biggish relative aperture.Preposition telescopic system uses transmission type optical system, and transmission type optical system is set
Meter can obtain biggish visual field and relative aperture, to guarantee that optical system radiation energy utilization efficiency improves.The present invention exists
There is good resolution ratio and contrast in certain spatial frequency range, to improve the detection resolution of system, guarantee to survey
The accuracy of amount.The big airborne Difference Absorption imaging spectrometer optical system of visual field wide spectrum detects 200- in 40 ° of visual fields
Good spectral resolution and spatial resolution can be obtained in 500nm wide spectrum, spectral resolution is better than 0.5nm, space
Resolution ratio is better than 5mrad, this index is reached the international leading level.
(2) the higher signal-to-noise ratio that the present invention can obtain.Offner-Littrow spectrum imaging system is based on convex surface
Grating splitting system, it is the core of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum, directly decides imaging
The spectral characteristic of spectrometer.Since ultraviolet band signal is weaker, high-resolution image spectrometer and faint spectral signal are visited
For the spectral instrument of survey, signal-to-noise ratio with higher is vital, and the main path for improving signal-to-noise ratio seeks to increase
The luminous flux and reduction noise of big spectrometer.Here spectrometer uses the beam splitting system of Littrow-Offner type, a side
Face inherits the advantage of Offner type optical system, and relative aperture is big, intrinsic aberration is small, image quality is high and system collection trimmed book
Lead high feature；The system also has the advantage of Littrow type optical system simultaneously: structure is simple, compact, with classics
The features such as Offner type optical system is smaller compared to volume, weight is lighter and adjustment is relatively easy.
(3) present invention is small in size, light-weight.The prior art is to realize big visual field wide spectrum airborne imaging spectrum instrument, generally
Movement sweeping mechanism is added to expand investigative range using field stitching method, or in preposition imaging system object space front end of looking in the distance.
The present invention splices method using spectrum, is made using the look in the distance connection of imaging system and Offner-Littrow imaging spectrometer of transmission-type
It obtains overall optical system to greatly reduce, whole optics volume compact, weight is considerably reduced with respect to other airborne similar products, and is not had
There is movement sweeping mechanism, reliability is higher, adapts to the different demands of airborne platform.
(4) present invention has good veiling glare rejection.The preposition ultraviolet object lens object space front end adding window mouth in each channel
It protects glass (fused silica material), it is anti-pollution on the one hand to play ultraviolet object lens, and another aspect window surface plates broadband filter coating；
Add at Offner-Littrow entrance spectrometer slit simultaneously and set optical filter, plating filter coating control band external spectrum enters spectrometer
It is internal.The grating of spectrometer uses convex surface holographic grating, and carry out astigmatic correction has the characteristics that no ghost line, signal-to-noise ratio are promoted simultaneously.
(5) the reflecting mirror structural behaviour and the preferable crystallite of hot property in the present invention in Offner-Littrow spectrometer
Glass material (Zerodur) or ULE glass material, surface oxygenation SiClx protective film of aluminizing ensure that instrument operating spectral range has
90% or more reflectivity.The ultraviolet object lens of preposition telephotolens add the ultraviolet anti-reflection film of plating, guarantee that its transmitance is greater than 98%
More than.
Detailed description of the invention
Fig. 1 is the airborne Difference Absorption imaging spectrometer optical system schematic diagram of big visual field wide spectrum of the invention；
Fig. 2 is Offner-Littrow imaging spectrometer optical system schematic diagram of the invention；
Fig. 3 is the airborne Difference Absorption imaging spectrometer mechanical-optical setup schematic diagram of big visual field wide spectrum of the invention.
In figure:
Specific embodiment
With reference to the accompanying drawing and specific embodiment further illustrates the present invention.
As shown in Figure 1, 2, 3, the optical system of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum, including preposition prestige
Distance imaging system and Offner-Littrow spectrum imaging system.Preposition imaging system of looking in the distance is according to detecting light spectrum (200-500)
Nm points are three spectrum channels, i.e. first passage (200-276) nm, second channel (276-380) nm, third channel (380-
500)nm.Preposition imaging system of looking in the distance specifically includes: the preposition imaging system of looking in the distance of first passage is specifically by first window 1, first
The first eyeglass of channel 2, first passage aperture diaphragm 3, the second eyeglass of first passage 4, first passage third eyeglass 5, first passage
4th eyeglass 6, the 5th eyeglass 7 of first passage composition.The preposition imaging system of looking in the distance of second channel is specifically by the second window 13, second
The first eyeglass of channel 14, second channel aperture diaphragm 15, the second eyeglass of second channel 16, second channel third eyeglass 17, second
The 4th eyeglass 18 of channel, the 5th eyeglass 19 of second channel composition.The preposition imaging system of looking in the distance of third channel is specifically by third window
25, the first eyeglass of third channel 26, third channel aperture diaphragm 27, the second eyeglass of third channel 28, third channel third eyeglass
29, the 4th eyeglass 30 of third channel, the 5th eyeglass 31 of third channel composition.The Offner-Littrow spectrum imaging system,
Match with preposition imaging system of looking in the distance and be also divided into three channels, is i.e. (200-276) nm, Section II channel (276- in I channel
380) nm, Section III channel (380-500) nm.The Offner-Littrow spectrum imaging system in I channel is specifically included by I
Channel entrance slit 8, I channel filter 9, I channel concave mirror 10, I channel convex grating 11, I channel are visited
Device 12 is surveyed to form.The Offner-Littrow spectrum imaging system in Section II channel is by Section II channel entrance slit 20, Section II channel
Optical filter 21, Section II channel concave mirror 22, Section II channel convex grating 23, Section II channel detector 24 form.Section III is logical
The Offner-Littrow spectrum imaging system in road is led to by Section III channel entrance slit 32, Section III channel filter 33, Section III
Road concave mirror 34, Section III channel convex grating 35, Section III channel detector 36 form.Object is 200-500nm wave
The light of section is from first passage first window, incidence formation three at the second window of second channel 13, third channel third window 25
The wave band in a channel, range be respectively the first ultraviolet channel (200nm~276nm), the second ultraviolet channel (276nm~380nm),
Third ultraviolet/visible light channel (380nm~500nm)；Wherein the light of 200nm~276nm wave band passes through the preposition of first passage
Imaging system of looking in the distance forms the first ultraviolet channel；It is logical that corresponding optical information focuses on subsequent Offner-Littrow spectrometer I
At road entrance slit 8, after the light of 276nm~380nm wave band is through the preposition imaging system of looking in the distance of second channel, it is purple to form second
The light of outer tunnel, 380nm~500nm wave band is ultraviolet/visible logical by the preposition imaging system formation third of looking in the distance of third channel
Road；Corresponding optical information focuses at subsequent Offner-Littrow spectrometer Section III channel entrance slit 32.
First ultraviolet channel (200nm~276nm) wave band optical information filters from I channel entrance slit 8 by I channel
Piece 9 enters Offner-Littrow imaging spectrometer system, reflexes to I channel convex surface light by I channel concave mirror 10
Grid 11 focus on the detector 12 in I channel after light splitting at turnover to I channel concave mirror 10；Second ultraviolet channel
(276nm~380nm) wave band optical information enters spectrometer by Section II channel filter 21 from Section II channel entrance slit 20, by
Section II channel concave mirror 22 reflexes to Section II channel convex grating 23, transfers after light splitting to Section II channel concave mirror 22
Place, focuses on Section II channel detector 24；Third channel ultraviolet/visible light channel (380nm~500nm) wave band optical information from
Section III channel entrance slit 32 enters spectrometer by Section III channel filter 33, anti-by Section III channel concave mirror 34
It is incident upon Section III channel convex grating 35, after light splitting at turnover to Section III channel concave mirror 34, focuses on the spy of Section III channel
It surveys on device 36.
The optical system of the big airborne Difference Absorption imaging spectrometer of visual field wide spectrum mainly by it is preposition look in the distance imaging system and
Rear end Offner-Littrow spectrum imaging system two parts composition, two systems are separable, separately design, manufacture, then closing
And while while designing spectrometer beam splitting system of the optical aberration of preposition optical system below may be implemented and compensated, instead
?.When integration system, either all should in subsystem or integration system optics optimal imaging, focusing, slope compensation
Meet.By the Preliminary design of convex grating imaging spectrograph front end imaging system and beam splitting system, initial knot has been respectively obtained
Structure.Just two initial configurations must be subjected to integrated design to improve the image quality of imaging spectrometer, front end is imaged
System and rear end spectrum system combine, and system carries out the optimization of optical system as a whole, in the mistake of optimization
Cheng Zhong, the aberration of reasonable distribution two systems, the final image quality for improving total system.
In order to match with the pupil of Littrow-Offner imaging spectrum system, preposition optical system must have image space
The structure of telecentricity, the resolving power of system is higher within the scope of broadband, and in order to meet the requirement of signal-to-noise ratio, system will also have biggish
Relative aperture.The spatial resolution of high spectral resolution ultraviolet imagery spectrometer is determined by preposition optical system.Bloom
The Liar of spectral resolution ultraviolet imagery spectrometer is the key component of system, and the specific requirement of the preposition ultraviolet object lens is such as
Under: pattern distortion is small, and the percentage distortion of entire view field image should be small as far as possible；Image space telecentric system, using the optical system
System, ensures that the center of picture point does not change；In addition, the image quality of optical system, size, modulation transmitting letter such as disc of confusion
Number (MTF), dispersion etc. will tighten control.
Preposition optical system is mainly made of the ultraviolet object lens of image space telecentricity, according to detecting objects spectral information, reality
The dispersion requirement and detector size size of border spectrometer, implement spectrum partitioning scheme here, the wave measured using three
Section (200-276nm, 276-380nm, 380-500nm), each image space telecentricity ultraviolet object lens and spectrometer series connection cooperation.Preceding glove
The focal plane of mirror places optical filter, and optical filter need to have optical efficiency as high as possible, has in the corresponding detecting band of guarantee
Higher transmitance, thus it is more demanding to coating process.
The design that respectively three wave bands are carried out with preposition telephotolens, since visual field is larger, focal length is shorter and because of detector
Installation need longer operating distance, the structure type of preposition ultraviolet object lens uses anti-long distance structure, by the negative, positive light separated
Group is constituted, and has negative power, referred to as preceding group close to the light group of object space.There is positive light coke close to the light group as plane, claim
It is rear group.Incident ray converges at focal plane F' after preceding group of diverging, using rear group.It is just being organized since image space interarea is located at
Right side is in the space as plane, therefore the back work distance of anti-long distance can be greater than focal length.The diaphragm of anti-tele-objective is located at
Positive group is intermediate, and axis outer light beam has biggish height of incidence, produces biggish primary off-axis aberration and advanced off-axis aberration.Preceding group
Here monolithic negative lens is used, the off-axis aberration itself generated is solved by itself, and remaining amount can be compensated by rear group.Anti- long distance
Rear group of object lens assumes responsibility for biggish aperture, and visual field is reduced due to there is preceding group of disperse function.More general object lens
Compare, rear group is that short distance is imaged, and asymmetric structure type can be used.
As shown in Fig. 2, including (for the first ultraviolet channel) in Offner-Littrow imaging spectrometer system of the present invention
I channel entrance slit 8, I channel filter 9, I channel concave mirror 10, I channel convex grating 11, I channel
Detector 12.From entrance slit it is incident after, through optical filter there is the polychromatic light of certain angle of divergence to be incident on concave mirror, then by
Concave mirror is reflected on convex grating, because the grating fringe density of convex grating is sufficiently high, makes the light beam from its diffraction
It is focused on detector back to concave mirror, then through concave mirror.The spectral image of last slit is imaged onto incident narrow
On the area array CCD for the side of sewing on.Convex grating in the present invention is the key core device of Offner-Littrow imaging spectrometer.
There is preferable resolution ratio in spatially and spectrally direction using the Offner imaging spectrometer of convex grating, is widely used to low
Dispersion, big visual field image light spectrometer in.Here convex grating be all according to the respective individually designed technical parameter of channel feature,
Such as score line reaches higher diffraction efficiency as far as possible.- 1 grade of diffraction is often used to be imaged.When the fringe number of grating increases
Add, the diffraction light of longer wavelength is stopped after the second secondary reflection of concave mirror by convex grating, therefore the dispersion of grating is not
It can be excessive.If the fringe number of grating is sufficiently large, diffraction light is made to be directed upwardly toward concave mirror, this is just at Offner-Littrow shape
Formula.Because spectral coverage is different, the convex grating parameter of respective channel spectrum instrument is different, and the embodiment of the present invention is different according to wave band,
Actual setting be the first ultraviolet channel (200~276nm), score line 2910L/mm, the second ultraviolet channel (276~380nm),
Score line is 2031L/mm, third ultraviolet/visible light channel (380~500nm), score line 1515L/mm.
In short, present invention benefit is divided using spectrum, detecting band (200-500nm) is divided into three channels, using anti-remote
Preposition imaging optical system combination Offner-Littrow spectrum imaging system of looking in the distance away from transmission-type, to improve optical system
Detection resolution, guarantee the accuracy of measurement, and make entire optical system volume compact.Offner-Littrow spectrometer
Light spectrum image-forming is had excellent performance, the improvement especially to distort, and is easy to the miniaturization and lightness of whole system, realizes purple
Outside/visible wide spectrum detects the requirement of high spectral resolution and spatial resolution, is particularly suitable for airborne technical application.
Part of that present invention that are not described in detail belong to the well-known technology of those skilled in the art.
Claims (7)
1. a kind of optical system of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum, it is characterised in that: the optics
System includes preposition imaging system and the Offner-Littrow spectrum imaging system of looking in the distance；It is described it is preposition look in the distance imaging system according to
Detecting light spectrum (200-500) nm points are three spectrum channels, i.e. first passage (200-276) nm, second channel (276-380)
Nm, third channel (380-500) nm, preposition imaging system of looking in the distance include: the preposition imaging system of looking in the distance of first passage specifically by
One window (1), the first eyeglass of first passage (2), first passage aperture diaphragm (3), the second eyeglass of first passage (4), first are led to
Road third eyeglass (5), the 4th eyeglass (6) of first passage, the 5th eyeglass (7) of first passage composition, second channel is preposition to look in the distance into
As system is specifically by the second window (13), the first eyeglass of second channel (14), second channel aperture diaphragm (15), second channel the
Two eyeglasses (16), second channel third eyeglass (17), the 4th eyeglass (18) of second channel, second channel the 5th eyeglass (19) group
At the preposition imaging system of looking in the distance of third channel is specifically by third window (25), the first eyeglass of third channel (26), third channel hole
Diameter diaphragm (27), the second eyeglass of third channel (28), third channel third eyeglass (29), the 4th eyeglass (30) of third channel,
The 5th eyeglass (31) of triple channel composition, the Offner-Littrow spectrum imaging system and preposition imaging system of looking in the distance are corresponding
Spectral coverage matching is also divided into three channels, i.e. (200-276) nm in I channel, Section II channel (276-380) nm, Section III channel
(380-500) nm, specifically include the Offner-Littrow spectrum imaging system in I channel by I channel entrance slit (8),
I channel filter (9), I channel concave mirror (10), I channel convex grating (11), I channel detector (12)
The Offner-Littrow spectrum imaging system of composition, Section II channel is filtered by Section II channel entrance slit (20), Section II channel
Piece (21), Section II channel concave mirror (22), Section II channel convex grating (23), Section II channel detector (24) composition, the
The Offner-Littrow spectrum imaging system in the channel III is by Section III channel entrance slit (32), Section III channel filter
(33), Section III channel concave mirror (34), Section III channel convex grating (35), Section III channel detector (36) composition, mesh
Marking object is the light of 200-500nm wave band at first passage first window (1), the second window of second channel (13), third channel
Incidence forms the wave band in three channels at third window (25), and range is the first ultraviolet channel (200nm~276nm), the respectively
Two ultraviolet channels (276nm~380nm), third ultraviolet/visible light channel (380nm~500nm)；Wherein 200nm~276nm wave
The light of section forms the first ultraviolet channel by the preposition imaging system of looking in the distance of first passage；Corresponding optical information focuses on subsequent
At Offner-Littrow spectrometer Section II channel entrance slit (8), the light of 276nm~380nm wave band is through second channel
After preposition imaging system of looking in the distance, the second ultraviolet channel is formed, the light of 380nm~500nm wave band passes through the preposition prestige of third channel
Distance imaging system formed third it is ultraviolet/viewability channel；Corresponding optical information focuses on subsequent Offner-Littrow spectrometer the
At the channel III entrance slit (32)；
First ultraviolet channel (200nm~276nm) wave band optical information passes through the 1st channel filter from I channel entrance slit (8)
(9) enter Offner-Littrow imaging spectrometer system, I channel convex surface is reflexed to by I channel concave mirror (10)
Grating (11) focuses on the detector in I channel (12) after light splitting at turnover to I channel concave mirror (10)；Second
Ultraviolet channel (276nm~380nm) wave band optical information passes through Section II channel filter (21) from Section II channel entrance slit (20)
Into spectrometer, Section II channel convex grating (23) is reflexed to by Section II channel concave mirror (22), turnover is to the after light splitting
At the channel II concave mirror (22), focus on Section II channel detector (24)；Third channel ultraviolet/visible light channel
(380nm~500nm) wave band optical information enters light by Section III channel filter (33) from Section III channel entrance slit (32)
Spectrometer reflexes to Section III channel convex grating (35) by Section III channel concave mirror (34), and turnover is logical to Section III after light splitting
At road concave mirror (34), focus on Section III channel detector (36).
2. a kind of optical system of big airborne Difference Absorption imaging spectrometer of visual field wide spectrum according to claim 1,
Be characterized in that: the preposition imaging system of looking in the distance is according to three wave bands (200nm~276nm), (276nm~380nm), (380nm
~500nm) preposition telephotolens design, specially the first ultraviolet object lens, the second ultraviolet object lens and the ultraviolet object of third are carried out respectively
Mirror, the preposition telephotolens in three channels design 40 ° of visual field, 15 ㎜ of focal length, 22 ㎜ of rear cut-off distance, and structure type uses anti-long distance
Structure, ultraviolet object lens are made of the negative, positive light group separated, have negative power close to the light group of object space, referred to as preceding group is close
The light group of slit has a positive light coke, referred to as after group, the wherein aperture diaphragm of the aperture diaphragm (3) of first passage, second channel
(15), the aperture diaphragm (27) of third channel is separately positioned on rear group of front end of the preposition ultraviolet object lens in respective channel.
3. a kind of optical system of big airborne Difference Absorption imaging spectrometer of visual field wide spectrum according to claim 2,
Be characterized in that: the preposition imaging system of looking in the distance: the first ultraviolet object lens, the second ultraviolet object lens and third ultraviolet object lens are respectively by preceding
Group and rear group are constituted, wherein before group design be made of 1 negative lens, rear group is designed as four mirrors compositions, wherein first is purple
Outer object lens, the second ultraviolet object lens lens materials be ultraviolet band transmitance good material composition, be here calcirm-fluoride and molten
Fused silica material, the lens materials of third ultraviolet object lens are calcirm-fluoride and F2, rear group of eyeglass third channel of third ultraviolet object lens
4th eyeglass (30), the 5th eyeglass (31) of third channel are formed using gluing technique.
4. a kind of optical system of big airborne Difference Absorption imaging spectrometer of visual field wide spectrum according to claim 1,
Be characterized in that: preposition imaging system design of looking in the distance must meet the following requirement: 1. have telecentric structure；2. with rear end spectrum
The convex grating splitting system numerical aperture of imaging system matches.
5. a kind of optical system of big airborne Difference Absorption imaging spectrometer of visual field wide spectrum according to claim 1,
It is characterized in that: first ultraviolet channel I channel convex grating (11), the second ultraviolet channel Section II channel convex grating
(23), third it is ultraviolet/viewability channel Section III channel convex grating (35) can be the Rowland grating on convex surface, be also possible to convex
The aberration correction grating in face.
6. a kind of optical system of big airborne Difference Absorption imaging spectrometer of visual field wide spectrum according to claim 1,
It is characterized in that: first ultraviolet channel I channel concave mirror (10), the second ultraviolet channel Section II channel concave mirror
(22), third it is ultraviolet/viewability channel Section III channel concave mirror (34) is all made of ULE optical glass.
7. a kind of optical system of big airborne Difference Absorption imaging spectrometer of visual field wide spectrum according to claim 2,
Be characterized in that: first ultraviolet object lens, the second ultraviolet object lens, third ultraviolet object lens respectively 200~276nm, 276~
380nm, 380~500nm wave band plate ultraviolet anti-reflection film；It is first ultraviolet channel lens object space front end first window (1), second ultraviolet
The second window of channel lens object space front end (13), third be ultraviolet/and viewability channel lens object space front end third window (25) plates respectively
200~276nm, 276~380nm, 380~500nm wave band bandpass filters；First ultraviolet channel I channel concave mirror
(10), the second ultraviolet channel Section II channel concave mirror (22), third it is ultraviolet/viewability channel Section III channel concave mirror
(34) the reflection aluminium film of respective channel wave band is plated respectively；Wherein the first ultraviolet channel I channel filter (9), second ultraviolet logical
Road Section II channel filter (21), third be ultraviolet/and viewability channel Section III channel filter (33) plates 200~276nm, 276 respectively
~380nm, 380~500nm bandpass filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811351191.0A CN109489817A (en) | 2018-11-14 | 2018-11-14 | A kind of optical system of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811351191.0A CN109489817A (en) | 2018-11-14 | 2018-11-14 | A kind of optical system of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109489817A true CN109489817A (en) | 2019-03-19 |
Family
ID=65695893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811351191.0A Pending CN109489817A (en) | 2018-11-14 | 2018-11-14 | A kind of optical system of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109489817A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975210A (en) * | 2019-04-28 | 2019-07-05 | 重庆冠雁科技有限公司 | A kind of bare engine module of handheld Raman spectrometer |
| CN111208080A (en) * | 2020-01-09 | 2020-05-29 | 中国科学院合肥物质科学研究院 | Large-view-field high-resolution ultraviolet imaging spectrometer optical system for earth observation |
| CN111208074A (en) * | 2020-01-09 | 2020-05-29 | 中国科学院合肥物质科学研究院 | Optical system of differential absorption imaging spectrometer based on edge observation |
| CN111854955A (en) * | 2020-07-17 | 2020-10-30 | 杭州电子科技大学 | Double-channel imaging spectrum objective lens and imaging spectrometer device |
| CN111999862A (en) * | 2020-07-09 | 2020-11-27 | 中国科学院西安光学精密机械研究所 | Compact type long-focus short-wave optical system with real-time multispectral imaging function |
| CN112013955A (en) * | 2020-09-10 | 2020-12-01 | 中北大学 | Spectral imaging method and device |
| CN112683796A (en) * | 2020-12-15 | 2021-04-20 | 中国科学院合肥物质科学研究院 | Differential absorption spectrometer optical system based on geosynchronous orbit observation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519595A (en) * | 2011-12-07 | 2012-06-27 | 中国科学院合肥物质科学研究院 | Optical system of satellite-borne differential absorption spectrometer |
| FR2970075A1 (en) * | 2011-01-03 | 2012-07-06 | Centre Nat Etd Spatiales | Wide-field imaging spectrometer for use in space vehicle to monitor earth in distinct spectral bands covering e.g. UV range, has detection assembly arranged to separate and isolate diffraction orders according to detection channels |
| CN206514950U (en) * | 2017-03-06 | 2017-09-22 | 中国科学院云南天文台 | A kind of large visual field high resolution spectrometer optical system |
| CN108613741A (en) * | 2016-12-13 | 2018-10-02 | 核工业西南物理研究院 | The transmission-type cascaded fiber grating spectrometer measured applied to multispectral segment sync |
-
2018
- 2018-11-14 CN CN201811351191.0A patent/CN109489817A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2970075A1 (en) * | 2011-01-03 | 2012-07-06 | Centre Nat Etd Spatiales | Wide-field imaging spectrometer for use in space vehicle to monitor earth in distinct spectral bands covering e.g. UV range, has detection assembly arranged to separate and isolate diffraction orders according to detection channels |
| CN102519595A (en) * | 2011-12-07 | 2012-06-27 | 中国科学院合肥物质科学研究院 | Optical system of satellite-borne differential absorption spectrometer |
| CN108613741A (en) * | 2016-12-13 | 2018-10-02 | 核工业西南物理研究院 | The transmission-type cascaded fiber grating spectrometer measured applied to multispectral segment sync |
| CN206514950U (en) * | 2017-03-06 | 2017-09-22 | 中国科学院云南天文台 | A kind of large visual field high resolution spectrometer optical system |
Non-Patent Citations (1)
| Title |
|---|
| 武耀 等: "光机热集成分析在高光谱成像仪紫外镜头中的应用", 《应用光学》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975210A (en) * | 2019-04-28 | 2019-07-05 | 重庆冠雁科技有限公司 | A kind of bare engine module of handheld Raman spectrometer |
| CN111208080A (en) * | 2020-01-09 | 2020-05-29 | 中国科学院合肥物质科学研究院 | Large-view-field high-resolution ultraviolet imaging spectrometer optical system for earth observation |
| CN111208074A (en) * | 2020-01-09 | 2020-05-29 | 中国科学院合肥物质科学研究院 | Optical system of differential absorption imaging spectrometer based on edge observation |
| CN111999862A (en) * | 2020-07-09 | 2020-11-27 | 中国科学院西安光学精密机械研究所 | Compact type long-focus short-wave optical system with real-time multispectral imaging function |
| CN111999862B (en) * | 2020-07-09 | 2021-10-15 | 中国科学院西安光学精密机械研究所 | Compact type long-focus short-wave optical system with real-time multispectral imaging function |
| CN111854955A (en) * | 2020-07-17 | 2020-10-30 | 杭州电子科技大学 | Double-channel imaging spectrum objective lens and imaging spectrometer device |
| CN111854955B (en) * | 2020-07-17 | 2022-08-12 | 杭州电子科技大学 | Double-channel imaging spectrum objective lens and imaging spectrometer device |
| CN112013955A (en) * | 2020-09-10 | 2020-12-01 | 中北大学 | Spectral imaging method and device |
| CN112013955B (en) * | 2020-09-10 | 2023-04-14 | 中北大学 | Spectral imaging method and device |
| CN112683796A (en) * | 2020-12-15 | 2021-04-20 | 中国科学院合肥物质科学研究院 | Differential absorption spectrometer optical system based on geosynchronous orbit observation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109489817A (en) | A kind of optical system of the airborne Difference Absorption imaging spectrometer of big visual field wide spectrum | |
| Schmidt et al. | A moderate-resolution, high-throughput CCD channel for the MMT spectrograph | |
| US7315371B2 (en) | Multi-channel spectrum analyzer | |
| CN102519595B (en) | Optical system of satellite-borne differential absorption spectrometer | |
| CN101975610B (en) | Light path structure of scanning and imaging spectrometer | |
| CN104729708B (en) | Anastigmatic broadband spectrum detection grating spectrometer | |
| CN106525237A (en) | Multi-slit multispectral system of crossed Czerny-Turner structure | |
| US11579423B2 (en) | Compact, catadioptric and athermal imaging spectrometer | |
| CN107976254A (en) | A kind of fiber spectrometer and multichannel optical fiber spectrometer device | |
| CN110186562B (en) | Full-band large-relative-aperture Dyson spectrum imaging system | |
| CN103234632A (en) | Push broom type spectrum imaging optical system with high resolution and wide visual field | |
| CN111208080A (en) | Large-view-field high-resolution ultraviolet imaging spectrometer optical system for earth observation | |
| CN205808912U (en) | Compact high-resolution wide visual field spectrum imaging system | |
| CN110319932A (en) | A kind of high light spectrum image-forming optics system | |
| CN101377569A (en) | Prism-grating-prism imaging system | |
| CN108051083A (en) | A kind of optical spectrum imaging device | |
| CN108801460A (en) | A kind of Shared aperture multichannel all band Hyperspectral imager | |
| CN104535184A (en) | Light path structure of prism-grating imaging spectrometer | |
| CN114360364A (en) | Multispectral imaging module and portable display device | |
| CN203249692U (en) | High-resolution wide-field of view optical system for push-broom spectral imager | |
| CN111208074A (en) | Optical system of differential absorption imaging spectrometer based on edge observation | |
| CN112525345B (en) | Method for detecting similar targets by using DMD-based multi-target imaging spectrum system | |
| CN105004421B (en) | It take grating as the imaging spectrometer of boundary | |
| CN103308161B (en) | Space remote sensing large-relative-hole-diameter wide-field high-resolution imaging spectrometer optical system | |
| CN100478657C (en) | Wide viewing field and high resolution ratio imaging arrangement for pushbroom optical spectrum imagers |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190319 |