CN108801458A - Wide spectrum high-precision spectrum scaling device under a kind of low temperature - Google Patents
Wide spectrum high-precision spectrum scaling device under a kind of low temperature Download PDFInfo
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- CN108801458A CN108801458A CN201810583054.3A CN201810583054A CN108801458A CN 108801458 A CN108801458 A CN 108801458A CN 201810583054 A CN201810583054 A CN 201810583054A CN 108801458 A CN108801458 A CN 108801458A
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- low temperature
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- 238000001228 spectrum Methods 0.000 title claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 230000003595 spectral effect Effects 0.000 claims abstract description 27
- 238000003384 imaging method Methods 0.000 claims abstract description 25
- 230000000007 visual effect Effects 0.000 claims abstract description 6
- 230000002459 sustained effect Effects 0.000 claims description 4
- 210000001747 pupil Anatomy 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 2
- 230000004075 alteration Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000011056 performance test Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization 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
Abstract
The invention discloses wide spectrum high-precision spectrum scaling devices under a kind of low temperature, including vacuum tank, integrating sphere, convergence optical system, monochromator, heavy caliber vacuum window, heavy caliber vacuum and low temperature parallel light tube, heavy caliber vacuum and low temperature scan mirror, imaging spectrometer.The invention is characterized in that tank external application " integrating sphere+convergence optical system+monochromator " provides the spectral calibration light source of standard, heavy caliber vacuum window meets the needs in the outer standard sources incidence vacuum tank of tank, heavy caliber vacuum and low temperature parallel light tube meets the needs of infinity target simulation, the demand of the big visual field of heavy caliber vacuum and low temperature scan mirror compensating image spectrometer.The present invention is especially suitable for the MTF performance tests that the EO-1 hyperion instrument of big visual field wide spectrum under cryogenic conditions carries out spectral calibration and camera, have test spectral coverage, visual field wide, vacuum and low temperature is adaptable, the high feature of calibration precision.
Description
Technical field
The present invention relates to imaging spectrometer spectral calibrations under vacuum and low temperature to test field, more particularly to wide range under a kind of low temperature
Section high-precision spectrum scaling device, performance parameter test is carried out applied to hyperspectral imager under the conditions of vacuum and low temperature.
Background technology
EO-1 hyperion observation satellite is a kind of relatively new type observation satellite in the world, and the load carried is in environment comprehensive
The side such as monitoring, mineral resources detection, land resources survey, the high area of coverage Biogeochemistry drawing of vegetation, Geological Hazards Investigation
There is very important effect in face.
The target that requirement, satellite operation pattern and the quantification of its technical indicator are applied is all poor with traditional model
Not, radiation energy is extremely segmented in spectrum dimension, to be highly prone to the influence factor interference of imaging links, causes to obtain
The quality of data it is not high, there is an urgent need for carry out imaging spectrometer low temperature spectra calibration technology technique study, realize full light path, full aperture etc.
Under full-scale condition, imaging spectrometer performance test, the solution and application of these technologies, for realizing EO-1 hyperion optical remote sensing are carried out
The quantification scientific goal of satellite has conclusive effect.
Invention content
In order to overcome existing technological difficulties, the present invention provides wide spectrum high-precision spectral calibrations under a kind of low temperature to fill
Set, which simply easily uses, and reliability is high, and calibration precision is high, disclosure satisfy that imaging spectrometer under the conditions of vacuum and low temperature into
The high-precision performance test demand of the big visual field of line width spectral coverage.
To achieve the goals above, technical scheme is as follows：
Wide spectrum high-precision spectrum scaling device under a kind of low temperature, including it is integrating sphere, convergence optical system, monochromator, big
Bore vacuum window, vacuum tank, heavy caliber vacuum and low temperature parallel light tube, heavy caliber vacuum and low temperature scan mirror, imaging spectral
Instrument.The integrating sphere, convergence optical system and monochromator layout are outside vacuum tank；Heavy caliber vacuum window is fixedly mounted on vacuum
On tank；Heavy caliber vacuum and low temperature parallel light tube, heavy caliber vacuum and low temperature scan mirror, imaging spectrometer layout are in vacuum tank
It is interior；And it is integrating sphere, convergence optical system and monochromator, heavy caliber vacuum and low temperature parallel light tube and heavy caliber vacuum and low temperature is two-dimentional
The optical axis for being directed toward the subsystems such as mirror is adjusted to apart from same ground sustained height.
Further, the radiation spectral coverage of the integrating sphere is wide (380nm~2500nm), and stability is good, and spoke brightness, colour temperature are equal
It can remotely be continuously adjusted；The convergence optical system has condenser performance good, can the emergent light of integrating sphere be converged to monochrome
At the incident diaphragm of instrument；If the Entry pupil diameters of convergence optical system are D, the enlargement ratio of convergence optical system is β, then D >=Φ
50mm, β≤0.1；Broadband light source can be isolated a series of monochromatic light of narrow bands, meet light by the monochromator
Spectrum calibration tests demand of the system to monochromatic source；If slit width is B, spectral resolution η, then 15 μm≤B≤2mm, η≤
0.1nm；Above-mentioned " integrating sphere+convergence optical system+monochromator " is placed on the spectral calibration source as standard outside vacuum tank, meets
Demand of the imaging spectrometer to wide spectrum and high-precision monochromatic source.
In the present invention, in order to make monochromator be capable of providing accurate monochromatic source, weaken ambient temperature in monochromator points
The influence of optical element is configured with Special temp controlling cover, has 20 ± 1 DEG C of temperature control abilities.
In the present invention, heavy caliber vacuum window can realize that imaging spectrometer carries out spectral calibration survey under the conditions of vacuum and low temperature
The features such as examination, heavy caliber vacuum window have high rigidity, good airproof performance, and transmitance is high in spectral region.
In the present invention, heavy caliber vacuum and low temperature parallel light tube can be used for simulating infinity target, and have temperature control ability
Meet imaging spectrometer testing requirement under vacuum low-temperature environment, the rear cut-off distance L of heavy caliber vacuum and low temperature parallel light tubef≥
1000mm, the outer target position of tank meet the inside and outside layout needs of test device tank, have image quality in the focal point of parallel light tube
Well, the features such as bore is big, and rear cut-off distance is big.
In the present invention, heavy caliber vacuum and low temperature scan mirror has the function of that bidimensional rotational positioning can compensate for imaging spectrometer
The big demand of visual field is tested, and meets the needs of spectral calibration under imaging spectrometer vacuum and low temperature with temperature control ability, there is height
The features such as reliability, two-dimensional scan, positioning accuracy is high, bore is big.
The invention has the advantages that：
By wide spectrum high-precision spectrum scaling device under a kind of low temperature, light under imaging spectrometer vacuum and low temperature can be realized
Spectrum calibration has the performances such as high-precision, calibration spectral coverage are wide, low temperature adaptability is strong, solves imaging spectrometer under vacuum and low temperature
The problem of carrying out high-precision wide spectral coverage spectral calibration.
Description of the drawings
Fig. 1 be the present invention a kind of low temperature under wide spectrum high-precision spectrum scaling device structure composition schematic layout pattern.
Specific implementation mode
Wide spectrum high-precision spectrum scaling device under a kind of low temperature of the present invention is made below with reference to Fig. 1 further detailed
Thin description.
An embodiment of the present invention provides wide spectrum high-precision spectrum scaling device, the devices under a kind of low temperature as shown in Figure 1
Imaging spectrometer can be met under vacuum and low temperature to spectral calibration testing requirement, specifically include integrating sphere 1, convergence optical system 2,
Monochromator 3, heavy caliber vacuum window 4, vacuum tank 5, heavy caliber vacuum and low temperature parallel light tube 6, heavy caliber vacuum and low temperature two dimension refer to
To mirror 7, imaging spectrometer 8.Wherein, integrating sphere 1, convergence optical system 2 and the layout of monochromator 3 are outside vacuum tank 5；Heavy caliber is true
Empty window 4 is fixedly mounted on vacuum tank 5；Heavy caliber vacuum and low temperature parallel light tube 6, heavy caliber vacuum and low temperature scan mirror 7,
Imaging spectrometer 8 is laid out in vacuum tank 5；And by integrating sphere 1, convergence optical system 2 and monochromator 3, heavy caliber vacuum and low temperature
The optical axis of the subsystems such as parallel light tube 6 and heavy caliber vacuum and low temperature scan mirror 7 is adjusted to apart from same ground sustained height.
Tank outer " integrating sphere 1+ convergence optical system 2+ monochromators 3 " is used as spectral calibration source, integrating sphere 1 to use spoke brightness,
Colour temperature can be remotely continuously adjusted, and radiate spectral coverage：380nm~2500nm, stability are high；The enlargement ratio of convergence optical system 2
For β, then D >=Φ 50mm, β≤0.1 converge to the outgoing light source of integrating sphere 1 at 3 diaphragm of monochromator；Because of monochromator 3 color separation member
Device is easily influenced by ambient temperature environment, and temperature control cover is configured with for monochromator 3 in the present invention, realizes that 3 working environment of monochromator is
20±1℃；The monochromatic source that monochromator 3 is emitted is incident to by heavy caliber vacuum window 4 in vacuum tank, and vacuum window installs
At hunting leak later, it is ensured that the vacuum degree of vacuum tank meets test needs.
Heavy caliber vacuum and low temperature parallel light tube 6 is used as infinity target simulator, test target to place parallel light tube 6 in tank
Focal point between heavy caliber vacuum window 4 and monochromator 3, the present invention in parallel light tube rear cut-off distance Lf>=1000mm,
Image quality will not be deteriorated and influence spectral calibration experiment under vacuum and low temperature in order to ensure parallel light tube, and parallel light tube needs to be equipped with special
The temperature control device that door is developed, work temperature ∈ [20 DEG C, 25 DEG C].
Heavy caliber vacuum and low temperature scan mirror 7 is placed on right over 8 light inlet of imaging spectrometer to be measured in tank, optical axis
It is located at sustained height with the optical axis of heavy caliber vacuum and low temperature parallel light tube 6, is directed toward mirror and has two kinds of shaping modes of roll and pitching,
And have lock function under both of which, meet in 8 test process of imaging spectrometer to be measured the needs of to stabilization of equipment performance.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various changes within the scope of the claims, this has no effect on this hair
Bright substantive content.
Claims (9)
1. wide spectrum high-precision spectrum scaling device under a kind of low temperature, which is characterized in that including integrating sphere (1), convergence optics
It unites (2), monochromator (3), heavy caliber vacuum window (4), vacuum tank (5), heavy caliber vacuum and low temperature parallel light tube (6), heavy caliber
Vacuum and low temperature scan mirror (7), spectrometer (8)；The integrating sphere (1), convergence optical system (2) and monochromator (3) layout
Vacuum tank (5) outside；Heavy caliber vacuum window (4) is fixedly mounted on vacuum tank (5)；Heavy caliber vacuum and low temperature parallel light tube
(6), heavy caliber vacuum and low temperature scan mirror (7), imaging spectrometer (8) layout are in vacuum tank (5)；And by integrating sphere (1),
Convergence optical system (2) and monochromator (3), heavy caliber vacuum and low temperature parallel light tube (6) and heavy caliber vacuum and low temperature two dimension are directed toward
The optical axis of mirror (7) is adjusted to apart from same ground sustained height.
2. wide spectrum high-precision spectrum scaling device under a kind of low temperature according to claim 1, which is characterized in that the product
The spectral calibration source of bulb separation (1), convergence optical system (2), monochromator (3) as standard；The spoke brightness of the integrating sphere (1),
Colour temperature can be remotely continuously adjusted, and radiate spectral coverage：380nm~2500nm, stability error：± 2%/2h.
3. wide spectrum high-precision spectrum scaling device under a kind of low temperature according to claim 1, which is characterized in that the meeting
Poly- optical system (2) converges to the emergent light of integrating sphere (1) at the incident diaphragm of monochromator (3)；If convergence optical system (2)
Entry pupil diameters be D, the enlargement ratio of convergence optical system (2) is β, then D >=Φ 50mm, β≤0.1.
4. wide spectrum high-precision spectrum scaling device under a kind of low temperature according to claim 1, which is characterized in that the list
Broadband light source is isolated a series of monochromatic source of narrow spectral coverages by color instrument (3), meets spectral calibration to monochromatic source
Demand；If slit width is B, spectral resolution η, then 15 μm≤B≤2mm, η≤0.1nm.
5. wide spectrum high-precision spectrum scaling device under a kind of low temperature according to claim 1, which is characterized in that the list
It is 20 ± 1 DEG C that color instrument (3), which has active temperature control ability, operating temperature,.
6. wide spectrum high-precision spectrum scaling device under a kind of low temperature according to claim 1, which is characterized in that the dress
It is the interior outer light source transmission channel of vacuum tank (5) to set Large diameter vacuum window (4)；Vacuum window (4) had both ensured vacuum tank (5)
Sealing performance requirement, and transmission line is provided and ensures that the monochromatic source of standard is incident to imaging spectrometer in tank (8) outside by tank,
If window bore is D, the transmitance of spectral coverage 380nm~2500nm is ρ, then has 100mm≤D≤160mm, ρ>0.9.
7. wide spectrum high-precision spectrum scaling device under a kind of low temperature according to claim 1, which is characterized in that the dress
It sets and infinity target simulator, heavy caliber vacuum and low temperature parallel light tube (6) is used as using heavy caliber vacuum and low temperature parallel light tube (6)
The monochromatic source outgoing directional light of focal point is incident to imaging spectrometer (8) through heavy caliber vacuum and low temperature scan mirror (7),
If heavy caliber vacuum and low temperature parallel light tube (6) bore is D1, spectral coverage δ, focal length f, rear cut-off distance Lf, wave aberration RMS then has
D1 >=Φ 600mm,F >=10000mm, LfThe λ of >=1000mm, RMS≤1/20, λ=0.6328 μm, and
Heavy caliber vacuum and low temperature parallel light tube (6) has active temperature control ability, operating temperature
8. wide spectrum high-precision spectrum scaling device under a kind of low temperature according to claim 1, which is characterized in that the dress
Set the demand of the big visual field of Large diameter vacuum and low temperature scan mirror (7) compensating image spectrometer (8), heavy caliber vacuum and low temperature two
Dimension is directed toward the heavy caliber large field of view scan function that mirror (7) realizes imaging spectrometer (8) scaling light source, realizes scaling light source by certain
Size and angle be incident to imaging spectrometer to be measured (8), if pointing accuracy isDirection speed is v, is directed toward mirror type RMS ',
Then haveV >=5 °/s, the λ of RMS '≤1/15, λ=0.6328 μm, and heavy caliber vacuum and low temperature scan mirror (7) have master
Dynamic temperature control ability, operating temperature
9. wide spectrum high-precision spectrum scaling device under a kind of low temperature according to claim 1, which is characterized in that the finger
Have roll and pitching two dimension lock function to mirror (7).
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| CN201810583054.3A CN108801458A (en) | 2018-06-07 | 2018-06-07 | Wide spectrum high-precision spectrum scaling device under a kind of low temperature |
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| CN201810583054.3A CN108801458A (en) | 2018-06-07 | 2018-06-07 | Wide spectrum high-precision spectrum scaling device under a kind of low temperature |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125321A (en) * | 1994-12-20 | 1996-06-26 | 中国科学院化工冶金研究所 | Wavelength-correcting device for intelligent grating monochromator and its method |
| CN1469156A (en) * | 2002-06-07 | 2004-01-21 | 富士写真光机株式会社 | Optical scanning device |
| CN102262058A (en) * | 2011-04-29 | 2011-11-30 | 中国科学院安徽光学精密机械研究所 | Vehicle-mounted target spectral remote-sensing device and method for range resolution of pollutant gas |
| CN103776535A (en) * | 2014-01-17 | 2014-05-07 | 北京航空航天大学 | Large view field type polarization spectrometer polarization accuracy calibration system |
| CN206115025U (en) * | 2016-10-31 | 2017-04-19 | 青岛小优智能科技有限公司 | 3D scan module that heat stability is high |
| CN107796515A (en) * | 2017-09-21 | 2018-03-13 | 上海卫星工程研究所 | Hyperspectral imager vacuum spectrum scaling device and its method of testing on star |
| CN106525239B (en) * | 2016-11-03 | 2018-08-28 | 西安应用光学研究所 | Raster pattern imaging spectrometer spatial spectral radiance responsiveness robot scaling equipment and method |
-
2018
- 2018-06-07 CN CN201810583054.3A patent/CN108801458A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125321A (en) * | 1994-12-20 | 1996-06-26 | 中国科学院化工冶金研究所 | Wavelength-correcting device for intelligent grating monochromator and its method |
| CN1469156A (en) * | 2002-06-07 | 2004-01-21 | 富士写真光机株式会社 | Optical scanning device |
| CN102262058A (en) * | 2011-04-29 | 2011-11-30 | 中国科学院安徽光学精密机械研究所 | Vehicle-mounted target spectral remote-sensing device and method for range resolution of pollutant gas |
| CN103776535A (en) * | 2014-01-17 | 2014-05-07 | 北京航空航天大学 | Large view field type polarization spectrometer polarization accuracy calibration system |
| CN206115025U (en) * | 2016-10-31 | 2017-04-19 | 青岛小优智能科技有限公司 | 3D scan module that heat stability is high |
| CN106525239B (en) * | 2016-11-03 | 2018-08-28 | 西安应用光学研究所 | Raster pattern imaging spectrometer spatial spectral radiance responsiveness robot scaling equipment and method |
| CN107796515A (en) * | 2017-09-21 | 2018-03-13 | 上海卫星工程研究所 | Hyperspectral imager vacuum spectrum scaling device and its method of testing on star |
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