CN102998089A - Calibration device of ultra-far ultraviolet detector - Google Patents
Calibration device of ultra-far ultraviolet detector Download PDFInfo
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- CN102998089A CN102998089A CN2012104787163A CN201210478716A CN102998089A CN 102998089 A CN102998089 A CN 102998089A CN 2012104787163 A CN2012104787163 A CN 2012104787163A CN 201210478716 A CN201210478716 A CN 201210478716A CN 102998089 A CN102998089 A CN 102998089A
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Abstract
The invention provides a calibration device of an ultra-far ultraviolet detector. The calibration device comprises a light source, a converging swing mirror unit, an ultraviolet monochrometer unit, a detector unit and a pressure difference unit, wherein the converging swing mirror unit comprises a converging swing mirror which comprises swing mirrors and a rotation displacement platform, the swing mirrors are two concave reflectors bonded by non-reflecting surfaces, central axes of the reflectors of the swing mirrors are coincide, a 30nm-200nm reflecting film is coated on a reflecting surface A of one reflector, and a 60nm-200nm reflecting film is coated on a reflecting surface B of the other reflector. The detector comprises a standard detector and a detector to be detected. The calibration device can correct spectral radiance parameters of the detector in 30nm-200nm. The calibration device is small in size, has sufficient ports, has unique design on ultra ultraviolet and far ultraviolet radiation calibration and removal of high-level spectra, and improves accuracy of the ultra ultraviolet and far ultraviolet radiation calibration.
Description
Technical field
The present invention relates to a kind of extreme ultraviolet detectors calibrate device, belong to the optical testing technology field.
Background technology
Can ultraviolet band according to propagating in atmosphere, broadly is divided into vacuum ultraviolet wave band (10nm～200nm) and antivacuum ultraviolet band (200nm～400nm).The following ultraviolet band of 200nm can by strong absorption, so want to carry out the optical metrology of vacuum wave band, must adopt the vacuum storehouse, to produce the environment of vacuum ultraviolet wave band metrology and measurement in air.((10nm～80nm), two wave band division limits are fuzzyyer for 80nm～200nm) and extreme ultraviolet waveband to be subdivided into again extreme ultraviolet at the vacuum ultraviolet wave band.The extreme ultraviolet that arrives involved in the present invention and far ultraviolet radiation calibration criterion device cover 30nm～200nm wave band.
The radiation characteristic of extreme ultraviolet and extreme ultraviolet (abbreviation extreme ultraviolet) wave band is different from visible light and infrared band, it has irreplaceable advantage in the space exploration field, phase supervention exhibition along with plans such as lunar exploration engineering, survey of deep space plan and mars explorations receives increasing concern.
Extreme ultraviolet and far ultraviolet maximum radiation standard are synchrotron radiation, but synchrotron radiation whole system more complicated, the operation difficulty, interface is less, and for extreme ultraviolet optics load, its test process is relatively various, uses synchrotron radiation just inconvenience to be arranged more.The ultraviolet calibration test chamber of US military is built testing laboratory of USN in, but mainly is to calibrate for the ultraviolet detection instrument in the reconnaissance satellite of U.S. air force.Testing laboratory of USN has set up cover extreme ultraviolet and an extreme ultraviolet calibration system, comprise extreme ultraviolet and extreme ultraviolet detectors calibrate device, extreme ultraviolet and extreme ultraviolet imager/imaging spectrometer calibrating installation, thermal vacuum environment control storehouse and other relevant auxiliary equipment etc., the calibration service of facing limit imager, ultraviolet earth observation instrument for the useful load earth atmosphere ultraviolet in the USAF DMSP specially.
NSRL and metering institute unite in the extreme ultraviolet and extreme ultraviolet calibrating installation of setting up based on synchrotron radiation at home, mainly lay particular emphasis on the calibration to standard component, interface mode, alignment time be underaction all, the wavelength band that covers is also incomplete, environmental test capability does not still possess, can not be at any time the extreme ultraviolet detector in time being calibrated, be badly in need of in national defense system and even domesticly set up extreme ultraviolet and the extreme ultraviolet detectors calibrate system that a cover can satisfy practical application request, fill the domestic gaps.
Summary of the invention
The object of the invention is to overcome the prior art deficiency, a kind of extreme ultraviolet detectors calibrate device is provided.
Technical solution of the present invention:
A kind of extreme ultraviolet detectors calibrate device comprises light source, converges pendulum mirror unit, ultraviolet monochromator unit and detector cells;
The described pendulum mirror unit that converges comprises and converges the pendulum mirror, it is positioned at and converges pendulum mirror vacuum storehouse, the described pendulum mirror that converges comprises pendulum mirror and swing offset platform, described pendulum mirror comprises the concave mirror that two non-reflecting surfaces are fitted, its catoptron central axes, described concave mirror subsequent corrosion scope is 50mm～5000mm, and wherein the reflecting surface A of a catoptron plates 30nm～200nm reflectance coating, the reflecting surface B plating 60nm～200nm reflectance coating of another piece catoptron;
Described detector cells comprises an electric rotating platform, and several equally distributed stations are arranged on it, and standard detector and detector to be measured are positioned on the station;
The light that described light source is launched is injected the described pendulum Jing Zhenkongcang that converges, and injects described ultraviolet monochromator unit through described converging after the pendulum mirror reflects, and is received by described detector cells after the unit dispersion light splitting of described ultraviolet monochromator.
Described ultraviolet monochromator unit comprises a ultraviolet grating, and it is positioned at ultraviolet monochromator vacuum storehouse, and described ultraviolet monochromator vacuum has a ultraviolet monochromator entrance slit and ultraviolet monochromator exit slit on the storehouse.
Described detector cells also comprises a detectors calibrate vacuum storehouse, and described electric rotating platform position in the inner.
Described light source and converge between the pendulum mirror vacuum storehouse pressure differential subdivision is arranged.
The bore scope of described pendulum mirror is 10mm～500mm, and radius is 50mm～5000mm.
Two mirror reflection surface center distance scopes of described pendulum mirror are 1mm～200mm.
The reflectance coating of two reflectings surface of described pendulum mirror is high-reflecting film.
Described pendulum mirror is rotated motion by the swing offset platform.
Described pressure differential subdivision and converge between the pendulum mirror vacuum storehouse and also have one to regulate corrugated tube.
The present invention's beneficial effect compared with prior art:
(1) the present invention installs back-to-back by in pendulum mirror storehouse two block energies being converged catoptron, and is coated with different optical thin films at two catoptrons, makes it use different catoptrons at different work spectral coverages, has avoided the interference of senior sub-spectrum radiation.
(2) the present invention considers the extensibility of calibration system, whole optical transmission system is designed to reflective minimum layout, the designs of each convergence, dispersion, imaging is modular form, make up according to test parameter and demand, greatly reduced the system space volume, reduce the system complex degree, improved the precision that light path is aimed at.
(3) design of vacuum flange interface module is when measuring apparatus designs, the flange-interface of vacuum storehouse, monochromator, light source and detector all is designed to same form, is convenient to when carrying out a plurality of vacuum ultraviolet parameter measurement, carry out the combined transformation of various devices.
(4) detector cells of the present invention is designed with one with the turntable of a plurality of stations, can place a plurality of detectors to be measured, and each station is with three-dimensional regulating mechanism, can regulate flexibly according to the measured device apparent size, so that the center of measured device is on optical axis, and meet designing requirement with the distance of optical transmission system.This design form can carry out to the measured device of any interface shape the spectral radiation metrology test of vacuum ultraviolet parameter, and is easy to adjust, uses very flexibly, and measured device can be various informative, can comprise detector, imager, spectral radiometer etc.
Description of drawings
Included accompanying drawing is used to provide the further understanding to the embodiment of the invention, and it has consisted of the part of instructions, is used for the illustration embodiments of the invention, and comes together to explain principle of the present invention with text description.Apparently, the accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of extreme ultraviolet detectors calibrate of the present invention apparatus structure principle schematic;
Fig. 2 is that the present invention converges pendulum mirror structural representation;
Fig. 3 is displacement platform structural principle synoptic diagram;
Fig. 4 is measurement light source pendulum mirror position view of the present invention;
Fig. 5 is for being computer control processing unit principle schematic of the present invention.
The extreme ultraviolet light source, 2. the pressure differential subdivision, 3. converge pendulum Jing Zhenkongcang, 4. converge the pendulum mirror, 5. ultraviolet monochromator entrance slit, 6. ultraviolet monochromator vacuum storehouse, 7. the ultraviolet grating, 8. ultraviolet monochromator exit slit, 9. standard detector, 10. detector to be calibrated, 11. regulate corrugated tubes, 12. electric rotating platform, 13. detectors calibrate vacuum storehouses,
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are elaborated.In the following description, nonrestrictive purpose has been set forth detail for explanation, to help to understand all sidedly the present invention.Yet, it will be apparent to those skilled in the art that also and can in having broken away from other embodiment of these details, put into practice the present invention.
Need to prove at this, for fear of having blured the present invention because of unnecessary details, only show in the accompanying drawings with according to the closely-related device structure of the solution of the present invention and/or treatment step, and omitted other details little with relation of the present invention.
With reference to the accompanying drawings embodiments of the invention are described.
With reference to the accompanying drawings embodiments of the invention are described.
As shown in Figure 1, a kind of extreme ultraviolet light source calibration device, service band comprise light source, converge pendulum mirror unit, ultraviolet monochromator unit and detector cells at 30nm～200nm.
Wherein, described light source is extreme ultraviolet light source 1, can be the ultraviolet sources such as hollow cathode light source, Penning discharge source, deuterium lamp, radio frequency light source.The characteristics of these light sources are noble gas discharges under high voltage, the low vacuum condition, and gas discharge can bring a large amount of heat, so light-source system generally is furnished with water circulation or air cooling system.Select the hollow cathode light source in the present embodiment, this light source is to utilize molecule and rare gas to carry out the stabilized light source of continuous gas discharge.It has abundant optic spectrum line at extreme ultraviolet without electronic noise between 25nm (50eV).It can produce the high ion line of intensity.Light source negative electrode and anode all adopt water cooling, and negative electrode is stainless steel material, and anode is aluminum.There is 1/8 a normal temperature and pressure tapped holes to be used for installing vacuum gauge at anode top and carries out gas pressure monitoring.Adopt a 2000v direct supply to light source power supply, its range of current: 250mA～500mA, stability can be controlled in 8 hours and drift about 0.05%, and supply voltage can be adjusted arbitrarily between 0～2000v.
The spectral transmission that can not adapt to 30nm～200nm at the existing optical glass of extreme ultraviolet wave band transmits, and all optical systems all adopt reflective optical structure, and employed light source also is without the window type light source.
The described pendulum mirror unit that converges as shown in Figure 2, comprises and converges pendulum mirror 4 and converge pendulum mirror vacuum storehouse 3, and the described pendulum mirror 4 that converges is positioned at and converges pendulum mirror vacuum storehouse 3.
The described pendulum mirror storehouse 3 of converging is the described operating room that converges pendulum mirror 4, adopts stainless steel material processing, and top is installed hatch door and is convenient to debugging pendulum mirror.The described pendulum mirror that converges comprises pendulum mirror and swing offset platform, and described pendulum mirror is positioned on the swing offset platform, carries out translation and rotatablely moves by the swing offset platform.Described pendulum mirror comprises that two concave mirrors are installed together, and concrete mounting means is that two non-reflecting surfaces fit together, and guarantees the catoptron central axes.Two mirror reflection surface center distance scopes of described pendulum mirror are 1mm～200mm.Two concave mirror subsequent corrosion scopes are 50mm～5000mm.Two catoptrons are the reflecting surface A plating 30nm～200nm reflectance coating of a catoptron wherein, mainly use at 30nm～60nm, and another piece plating 60nm～200nm reflectance coating, the following spectral reflectivity of 60nm is lower, mainly in 60nm～200nm use.Reflectance coating can adopt high-reflecting film.Pointolite can converge to diverging light another focus place after putting mirror through this.Pendulum mirror material is for melting quartz, and the bore scope of described pendulum mirror is 10mm～500mm, and radius is 50mm～5000mm.
Described swing offset platform is the electronic rotation displacement platform, and as shown in Figure 3, described pendulum mirror is rotated motion by the swing offset platform.Selected electricity driving displacement platform stroke is 25mm, and sensitivity is 10 μ m.Selected electric rotating platform corner is 70 °, and angular error is 0.01 °.
Of the present invention converge should be placed on when the pendulum mirror uses converge in the pendulum mirror storehouse, converge pendulum Jing Cang and be the operating room of pendulum mirror, adopt stainless steel material processing, top is installed hatch door and is convenient to debugging pendulum mirror.
Described detector cells of the present invention comprises electric rotating platform 12, extreme ultraviolet standard detector 9, extreme ultraviolet detector 10 to be calibrated and detectors calibrate vacuum storehouse 13.Described electric rotating platform 12 is positioned at detectors calibrate vacuum storehouse 13, and the station of several equally distributed placement detectors is arranged on it, except placing standard detector, can also place detector 10 to be calibrated at other station, is used for calibrating detector to be calibrated.
Described extreme ultraviolet standard detector 9 is silicon photoelectric diode extreme ultraviolet detector, demarcates through measurement unit and uses as standard detector.Its wavelength coverage 105nm～500nm, sensitive area 100mm2, encapsulated type pottery.
Electric rotating platform 12 of the present invention, can place a plurality of detectors to be measured, and each station can be regulated flexibly according to the measured device apparent size with three-dimensional regulating mechanism, so that the center of measured device is on optical axis, and meet designing requirement with the distance of optical transmission system.This design form can carry out to the measured device of any interface shape the spectral radiation metrology test of vacuum ultraviolet parameter, and is easy to adjust, uses very flexibly, and measured device can be various informative, comprises light source, detector, imager, spectral radiometer etc.
Because the working vacuum degree of light source is lower, and the vacuum tightness of follow-up device is higher, increase by a cover pressure difference unit 2 in the middle of need to and converging the pendulum mirror unit at light source, pressure differential subdivision 2 is light source and described converging between the pendulum mirror vacuum storehouse 3, its effect is to make the rare gas of light source one side few ultraviolet monochromator unit that enters of trying one's best, and affects vacuum tightness and calibration accuracy.Described pressure differential subdivision 2 is a disk, and the center is with rectangular aperture, and radiation of light source enters follow up device thus.
At pressure differential subdivision 2 with converge between the pendulum mirror vacuum storehouse 3 and have one to regulate corrugated tube 11, be used for flexible pressure differential subdivision and converge pendulum mirror storehouse relative position, described adjusting corrugated tube 11 can carry out multidimensional to be regulated and not to affect optical system for testing.
Described ultraviolet monochromator unit comprises ultraviolet monochromator vacuum storehouse 6 and ultraviolet grating 7, in the described ultraviolet monochromator vacuum storehouse 6 ultraviolet grating 7 is installed, grating driving mechanism and related electric interface are such as motor drive power supply interface, position sensor signal interface etc.Whole described ultraviolet monochromator focal length 200mm, spectral resolution 0.1nm, wavelength accuracy: 0.1nm, f/#4.5, spectral range 30nm～500nm.Described ultraviolet grating 7 is an IV type concave holographic grating, can work in 30nm～200nm wavelength coverage, and grating line is at 1200G/mm.The grating rotating mechanism is selected sine mechanism, can realize that the high precision of grating is rotated control.Described ultraviolet monochromator vacuum storehouse 6 input ports are ultraviolet monochromator entrance slit 5, and output port is ultraviolet monochromator exit slit 8; Described incident and exit slit size are adjustable continuously from 10um～5mm.
The present invention also comprises a computer control unit, be used for the spectral signal of standard detector collection is processed, as shown in Figure 5, it comprises signal acquisition module, spectral scan control module, switching controls module, data memory module, data processing module and computing machine at least, and wherein said signal acquisition module gathers for the spectral intensity curve signal that standard detector is received light source.The spectral scan control module is used for the real-time control to grating corner and position.The switching controls module is used for pendulum mirror swing offset, realizes that the light source wave band switches, and is used for realizing simultaneously the rotation of electric rotating platform 12, makes detector to be calibrated place pipeline.Data memory module is used for storage and the record of image data.Data processing module is used for the transmission of quantity value between standard detector data and the data to be calibrated, and measurement data is sent into calibrating mathematical model, exports through after the computing.The computer control unit that the present invention relates to is technological means well known in the art, repeats no more herein.
The flange-interface size that the present invention will converge pendulum mirror vacuum storehouse 3, ultraviolet monochromator vacuum storehouse 6 and detectors calibrate vacuum storehouse 13, ultraviolet monochromator unit, extreme ultraviolet light source 1 and standard detector 9 can all be designed to same size, will be convenient to carry out when carrying out a plurality of vacuum ultraviolet parameter measurement the combined transformation of various devices.
Each vacuum storehouse of the present invention also comprises liquid nitrogen filling apparatus and circulating water device, with three grades of pumped vacuum systems, is respectively mechanical pump, lobe pump, molecular pump, and final vacuum can arrive 9 * 10-5Pa, and minimum temperature can arrive-100 ℃.Modular vacuum flange Interface design so that in the system all parts be in the vacuum system, can utilize a vacuum storehouse pumped vacuum systems to vacuumize, system is oversimplified.Wherein, liquid nitrogen filling apparatus and circulating water device are the conventional techniques of this area in the vacuum storehouse, repeat no more herein.
Light trend of the present invention and principle of work:
The light that described light source is launched is injected the described pendulum mirror vacuum storehouse 3 of converging, through the described input port ultraviolet monochromator entrance slit 5 of injecting described ultraviolet monochromator unit after pendulum mirror 4 reflects that converges, after described ultraviolet grating 7 dispersion light splitting, then output port ultraviolet monochromator exit slit 8 outputs through described ultraviolet monochromator unit are received by described detector cells.
The below introduces principle of work of the present invention:
In the calibration of detector relative spectral response, as shown in Figure 4, behind the extreme ultraviolet light stability, detectors calibrate spectral range (30nm～200nm) at first is set, rotation pendulum mirror workplace this moment is the A face, makes extreme ultraviolet light source 1 place working light path, ultraviolet monochromator unit scan 30nm～60nm wave band, standard detector 9 is surveyed and is received, and records the spectral intensity curve of extreme ultraviolet light source 1.Under handover module control, rotation pendulum mirror Rotate 180 °, rotation pendulum mirror workplace this moment is the B face, make extreme ultraviolet light source 1 place working light path, described ultraviolet monochromator unit scan 60nm～200nm wave band, described detector is surveyed and is received, and records the spectral intensity curve of extreme ultraviolet light source 1.So just finished the record of 30nm～200nm extreme ultraviolet light source 1 spectrum, as standard spectrum responsiveness curve.After standard detector 9 work, by electric rotating platform detector 10 to be calibrated is switched in the working light path, the same with above-mentioned standard detector 9 spectral measurements, described ultraviolet monochromator unit scan is exported whole calibration spectrum, detector 10 to be calibrated is surveyed and is received, record the spectral intensity curve of light source, by comparison operation and correlation factor correction, just can realize the relative spectral response calibration of detector 10 to be calibrated.
The invention is not restricted to the extreme ultraviolet detector is calibrated, can also comprise the calibration of imager, spectral radiometer etc., its principle of work similarly.
Many feature and advantage of the embodiment of the invention are clearly according to this detailed description, so claims are intended to cover all these feature and advantage in its true spirit and the scope of falling into of these embodiment.In addition, owing to those skilled in the art will find apparent that a lot of modifications and change, therefore not embodiments of the invention to be limited to precision architecture and operation illustrated and that describe, but can contain all suitable modifications and the equivalent that falls in its scope.
The unspecified part of the present invention is technology as well known to those skilled in the art.
Claims (9)
1. an extreme ultraviolet detectors calibrate device is characterized in that comprising light source, converges pendulum mirror unit, ultraviolet monochromator unit and detector cells;
Described converge the pendulum mirror unit comprise converge the pendulum mirror (4), it is positioned at and converges pendulum Jing Zhenkongcang (3), the described pendulum mirror (4) that converges comprises pendulum mirror and swing offset platform, described pendulum mirror comprises the concave mirror that two non-reflecting surfaces are fitted, its catoptron central axes, described concave mirror subsequent corrosion scope is 50mm～5000mm, wherein the reflecting surface A of a catoptron plates 30nm～200hm reflectance coating, the reflecting surface B plating 60hm～200hm reflectance coating of another piece catoptron;
Described detector cells comprises an electric rotating platform (12), and several equally distributed stations are arranged on it, and standard detector (9) and detector to be measured (10) are positioned on the station;
The light that described light source is launched is injected the described pendulum Jing Zhenkongcang (3) that converges, and injects described ultraviolet monochromator unit through described converging after pendulum mirror (4) reflects, and is received by described detector cells after the unit dispersion light splitting of described ultraviolet monochromator.
2. a kind of extreme ultraviolet light source calibration device according to claim 1, it is characterized in that described ultraviolet monochromator unit comprises a ultraviolet grating (7), it is positioned at ultraviolet monochromator vacuum storehouse (6), and a ultraviolet monochromator entrance slit (5) and ultraviolet monochromator exit slit (8) are arranged on the described ultraviolet monochromator vacuum storehouse (6).
3. a kind of extreme ultraviolet light source calibration device according to claim 1 is characterized in that described detector cells also comprises a detectors calibrate vacuum storehouse (13), and described electric rotating platform (12) position in the inner.
4. a kind of extreme ultraviolet light source calibration device according to claim 1 is characterized in that described light source and converges between the pendulum Jing Zhenkongcang (3) that a pressure differential subdivision (2) is arranged.
5. the pendulum mirror that converges according to claim 1, the bore scope that it is characterized in that described pendulum mirror is 10mm～500mm, radius is 50mm～5000mm.
6. the pendulum mirror that converges according to claim 1 is characterized in that two mirror reflection surface center distance scopes of described pendulum mirror are 1mm～200mm.
7. the pendulum mirror that converges according to claim 1, the reflectance coating that it is characterized in that two reflectings surface of described pendulum mirror is high-reflecting film.
8. the pendulum mirror that converges according to claim 1 is characterized in that described pendulum mirror is rotated motion by the swing offset platform.
9. the pendulum mirror that converges according to claim 4 is characterized in that described pressure differential subdivision (2) and converges to also have one to regulate corrugated tube (11) between the pendulum Jing Zhenkongcang (3).
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| CN103575402A (en) * | 2013-11-07 | 2014-02-12 | 中国电子科技集团公司第四十一研究所 | Non-refrigeration infrared detector relative spectral response temperature characteristic testing device and method |
| CN106706129A (en) * | 2016-12-30 | 2017-05-24 | 中国科学院西安光学精密机械研究所 | Standard modularization spaceborne spectrometer |
| CN110044490A (en) * | 2019-05-21 | 2019-07-23 | 上海航天测控通信研究所 | A kind of fast switch type emissivity measurement device and measurement method |
| CN110470400A (en) * | 2018-05-09 | 2019-11-19 | 北京振兴计量测试研究所 | Spectral radiance responsiveness measuring system |
| CN110940494A (en) * | 2018-09-21 | 2020-03-31 | 北京振兴计量测试研究所 | Laser target simulator field calibration device |
| CN113820009A (en) * | 2021-09-22 | 2021-12-21 | 中国科学院长春光学精密机械与物理研究所 | On-orbit radiation calibration method for space extreme ultraviolet solar telescope |
| CN114441036A (en) * | 2020-11-06 | 2022-05-06 | 北京振兴计量测试研究所 | Device and method for calibrating absolute spectral responsivity of optical load |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110470400A (en) * | 2018-05-09 | 2019-11-19 | 北京振兴计量测试研究所 | Spectral radiance responsiveness measuring system |
| CN110940494A (en) * | 2018-09-21 | 2020-03-31 | 北京振兴计量测试研究所 | Laser target simulator field calibration device |
| CN110044490A (en) * | 2019-05-21 | 2019-07-23 | 上海航天测控通信研究所 | A kind of fast switch type emissivity measurement device and measurement method |
| CN110044490B (en) * | 2019-05-21 | 2021-07-23 | 上海航天测控通信研究所 | Fast switching type emissivity measuring device and measuring method |
| CN114441036A (en) * | 2020-11-06 | 2022-05-06 | 北京振兴计量测试研究所 | Device and method for calibrating absolute spectral responsivity of optical load |
| CN113820009A (en) * | 2021-09-22 | 2021-12-21 | 中国科学院长春光学精密机械与物理研究所 | On-orbit radiation calibration method for space extreme ultraviolet solar telescope |
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