CN105444882B - Realize eight passage radiometers of self calibration function - Google Patents
Realize eight passage radiometers of self calibration function Download PDFInfo
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- CN105444882B CN105444882B CN201510934342.5A CN201510934342A CN105444882B CN 105444882 B CN105444882 B CN 105444882B CN 201510934342 A CN201510934342 A CN 201510934342A CN 105444882 B CN105444882 B CN 105444882B
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- 238000001514 detection method Methods 0.000 claims description 7
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- 238000005086 pumping Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000002269 spontaneous effect Effects 0.000 claims description 3
- 230000005622 photoelectricity Effects 0.000 claims description 2
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- 230000013011 mating Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 17
- 238000005259 measurement Methods 0.000 abstract description 12
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- 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
- G01J3/02—Details
- G01J3/0297—Constructional arrangements for removing other types of optical noise or for performing calibration
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- 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
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Abstract
The invention discloses a kind of eight passage radiometers for realizing self calibration function, the radiometer has Radiation Observation and self-calibration function concurrently, mainly included：Observation light path, relative photon generation module, scan module module, multiplexing are looked in the distance module, collimated light path module, light splitting and Path of Convergent Rays module, photodetection and signal processing module；The thinking of the present invention is by the built-in relative photon robot scaling equipment in radiometer, the decay factor of the optical circuit of eight passage radiometers is assessed, realization is periodically corrected to eight passage calibration of radiometer coefficients, because relative photon robot scaling equipment itself is absolute, high-precision measurement criteria need not be traceable to, higher calibration precision can be reached.
Description
Technical field
The present invention relates to remote sensing science and optical radiation measurement field, specifically a kind of eight passage spokes for realizing self calibration function
Penetrate meter design.
Background technology
Spectral radiometer is to obtain the most important photoelectric measurement equipment of remote sensing observations target optical spectrum radiation information, can be arranged
In multiple platforms such as ground, unmanned plane, balloon, satellite, obtain the spectral radiance of observed object, agricultural, industry, it is military,
The numerous areas such as space flight have a wide range of applications.
The spectroscopic modes of the spectral radiometer of commercialization at present have a variety of, including optical filter, grating, prism, liquid crystal tunable
Humorous etc., these spectral radiometers typically need to carry out Laboratory Calibration before observation, obtain the calibration coefficient of spectral radiometer.Defending
On star observation platform, in general remote sensor all can be by the outer space environmental factor such as space ultraviolet irradiation, high-energy particle bombardment
Influence, the easy aging decay of light, electric device, to optical sensor calibration coefficient, periodically correction can be with exact inversion target optical spectrum
Spoke brightness.
Mainly there are onboard process and In-flight calibration two ways, onboard process to moonscope Calibration of remote sensor mode at present
Then using the sun, the moon or fixed star celestial body as scaling light source, calibrated using diffusing panel on star, or be put on satellite platform
Built-in scaler.In-flight calibration is then the associated arguments such as synchro measure ground and air when satellite crosses top, substitutes into propagation in atmosphere
Model, the process of inverting satellite entrance pupil spoke brightness.
Either onboard process or In-flight calibration, in order to improve the application level of Satellite Payloads, it is required for defending
The radiation magnitude tracing of starlight load arranges scaler, it is ensured that satellite effectively carries to the SI system of units on satellite platform
Lotus is traced to the source to high-precision measurement criteria, but in general measurement criteria can also change on satellite platform, and this change is such as
What is assessedOnboard process device is arranged on satellite platform in addition, all multiple resources of satellite platform need to be taken, influence the use of satellite
Life-span.
Relative photon calibration technology is interacted the phases such as generation time, space, frequency using laser and nonlinear dielectric
The process of photon is closed, detects the presence that a photon can predicts another photon, can be realized pair using this principle
The quantum efficiency of photodetector carries out qualitative assessment.The eight passage radiometers developed, possess Radiation Observation and self-calibration function,
Wherein self calibration module can carry out quantitative measurment to the optical circuit fissipation factor of eight passage radiometers, so as to realize eight passages
Radiometer " no standard transmission " absolute calibration, will play space-reference radiation level during Future Satellite remote sensing onboard process
Effect, realize to other moonscope Calibration of remote sensor coefficients carry out transmission of quantity value.
The content of the invention
The present invention provides a kind of eight passage radiometers that can realize self calibration, and equipment has Radiation Observation and self calibration work(concurrently
Can, self calibration module can carry out qualitative assessment to the photoelectricity fissipation factor of eight passage radiometers, periodically obtain the radiation of eight passages
The calibration coefficient of meter, realize the correction to eight passage radiometer Radiation Observation values.
The present invention is achieved by the following technical solutions：
A kind of eight passage radiometers for realizing self calibration function, it is characterised in that：Include observation light path, observe in light path
It is sequentially provided with relative photon generation module, scan module module；The relative photon generation module include set gradually swash
Light device, the polarizer, half-wave plate, laser power stability device, condenser lens, nonlinear crystal and collimation lens, described laser
Device produces the pumping laser that wavelength is 355nm, plays generation linearly polarized light to the rear by the polarizer, is produced after laser power stability device
Raw stable laser beam, the center of nonlinear crystal is converged to by over-focusing lens, is meeting phase-matching condition
In the case of, the broadband relative photon spectrum of spontaneous radiation is produced, the directional light of collimation is produced after collimated lens；It is described to sweep
Retouching motor module includes scanning reflection mirror, and eight passage radiometers are switched into Radiation Observation pattern and calibration mode respectively respectively,
Scan module module scanning reflection mirror work when reflected light path on be sequentially provided with multiplexing look in the distance module, collimated light path module,
Light splitting and Path of Convergent Rays module, photodetection and signal processing module；The cut-off for being multiplexed module of looking in the distance and including setting gradually
Optical filter, preposition diaphragm, Path of Convergent Rays, speculum and field stop, on the one hand it is used to determine that the observation of eight passage radiometers regards
Field size, on the other hand ensure that Radiation Observation pattern and calibration mode have common transmission light path；The collimated light path module is
The divergent beams exported at field stop are converted into directional light；The light splitting and Path of Convergent Rays are by eight ripples by color separation film
Long relative photon light source is spatially separating, and is incided by Path of Convergent Rays in corresponding photon counting detector；The light
Electrical resistivity survey is surveyed and signal processing module includes the photoelectric detection module being sequentially connected, meets detecting module and signal processing module；
Photoelectric detection module is that photon signal is converted into electric impulse signal, the relative photon letter of eight wave bands using photon counting detector
Number eight road photon counting detectors are respectively adopted is detected；It is by the Transistor-Transistor Logic level signal after shaping pulse to meet detecting module
Detected through time-to-amplitude converter；Signal processing module is then record coincidence counting, unexpected coincidence counting, trigger port meter
Number, trigger port dark counting, and counting and the dark counting of eight channel detectors are recorded during Radiation Observation.
Signal processing module, the signal transacting of main signal transacting and Radiation Observation pattern including calibration mode, calibration
The signal transacting of pattern is mainly the optical circuit loss for obtaining common sparing, and the signal processing of Radiation Observation pattern is main
It is the photon velocity of the spectrum channel of the photon counting detector in record unit time, and finally obtains eight passage radiometers
Correction coefficient.
The eight passage radiometer radiation calibration bearing calibrations based on self calibration function, specific implementation step are as follows：
（1）Open laser power stabilizer, photon counting detector, time-to-amplitude converter, photon counter
Etc. the power supply of measuring apparatus, preheat more than 30 minutes；
（2）The scanning reflection mirror of scan module module is switched to calibration light path, the light transmission shaft of fine adjustment half-wave plate with
The optical axis direction of nonlinear crystal is consistent, sets the time of measuring of photon counting detector, record time-to-amplitude conversion output
Effective coincidence counting value and effective flip-flop number value；
（3）The optical axis direction of half-wave plate is rotated into 45 degree of angles, the time of measuring of photon counting detector is set, records the time
The unexpected coincidence counting value and background flip-flop number value of amplitude conversion output；
（4）Pass through（2）、（3）Obtain the shared optical circuit decay factor size of Radiation Observation and calibration mode；
（5）Pumping laser is closed, scanning reflection mirror is rotated by 90 ° and is switched to Radiation Observation light path, sets photon counting to visit
The time of measuring of device is surveyed, records the photon count value of each passage photon counting detector output；
（6）Will（4）、（5）The relevant parameter and known parameters of middle measurement are updated to eight passage radiometer actinometry equations
In, the radiation calibration coefficient of the passage of eight passage radiometers of acquisition.
It is an advantage of the invention that：
During relative photon calibration technology is applied to optical sensor spectroradiometric measurement by the present invention, periodically realization pair
The renewal and amendment of optical sensor calibration coefficient, because relative photon calibration is a kind of calibration technology for not needing standard transmission,
Therefore high-precision measurement criteria on laboratory and satellite platform need not be traced, in theory there is lower measurement not know
Degree.
The spectral radiometer that the present invention is made using relative photon calibration principle, has Radiation Observation and self-alignment work(concurrently
Can, self calibration module can realize that the change to the whole optical circuit of spectral radiometer measures, changed factor is updated to
Revised calibration coefficient can be obtained in actinometry equation, so as to realize the self calibration of spectral radiometer.
Brief description of the drawings
Fig. 1 is the eight passage radiometer light path schematic diagrams that the present invention realizes self calibration function.
Fig. 2 is photodetection of the present invention and signal processing module schematic diagram.
Embodiment
As shown in Figure 1, 2, a kind of eight passage radiometers for realizing self calibration function, include observation light path 1, observe light path
Relative photon generation module 2, scan module module 3 are sequentially provided with 1；Relative photon generation module 2 includes what is set gradually
Laser 2.1, the polarizer 2.2, half-wave plate 2.3, laser power stability device 2.4, condenser lens 2.5, nonlinear crystal 2.6 and
Collimation lens 2.7, laser 2.1 produce the pumping laser that wavelength is 355nm, generation linear polarization to the rear are played by the polarizer 2.2
Light, stable laser beam is produced after laser power stability device 2.4, nonlinear crystal is converged to by over-focusing lens 2.5
2.6 center, in the case where meeting phase-matching condition, the broadband relative photon spectrum of spontaneous radiation is produced, passed through
The directional light of collimation is produced after collimation lens 2.7；Scan module module 3 includes scanning reflection mirror 3.1, respectively radiates eight passages
Meter is switched to Radiation Observation pattern and calibration mode, the reflected light when scanning reflection mirror 3.1 of scan module module 3 works respectively
Be sequentially provided with road multiplexing look in the distance module 4, collimated light path module 5, light splitting and Path of Convergent Rays module 6, photodetection and signal at
Manage module；Multiplexing look in the distance module 4 include set gradually edge filter 4.1, preposition diaphragm 4.2, Path of Convergent Rays 4.3, reflection
Mirror 4.4 and field stop 4.5, on the one hand it is used for the observation visual field size for determining eight passage radiometers, on the other hand ensures radiation
Observation mode and calibration mode have common transmission light path；Collimated light path module 5 is the diverging light that will be exported at field stop 4.5
Beam is converted to directional light；Light splitting and Path of Convergent Rays 6 are that the relative photon light source of eight wavelength is carried out into space point by color separation film
From being incided by Path of Convergent Rays in corresponding photon counting detector；Photodetection and signal processing module include successively
The photoelectric detection module 7 of connection, meet detecting module 8 and signal processing module 9；Photoelectric detection module 7 is to utilize photon counting
Photon signal is converted to electric impulse signal by detector, and eight tunnel photon counting detections are respectively adopted in the relative photon signal of eight wave bands
Device is detected；It is to be detected the Transistor-Transistor Logic level signal after shaping pulse through time-to-amplitude converter to meet detecting module 8；
Signal processing module 9 is then record coincidence counting, unexpected coincidence counting, trigger port counting, trigger port dark counting, and spoke
The counting for recording eight channel detectors and dark counting are penetrated in observation process.
As shown in Fig. 2 flashlight and idle light are received by photon counting detector caused by parametric down conversion process, pass through
The Transistor-Transistor Logic level signal of standard is produced after opto-electronic conversion, it is assumed that all the way as triggering photon signal, be input to time-to-amplitude converter
Start ends, after the delayed device of another way, be input to the Stop ends of time-to-amplitude converter, time-to-amplitude converter can will
The time interval that two-way relative photon reaches is converted to amplitude output, by multichannel analyzer by different distribution of amplitudes in difference
Road location on, record effectively triggering photon counting using multiple metering device and meet photon counting, it is unexpected meet photon counting, profit
The critical data in experimentation, figure are recorded and preserved with upper computer software, and to measurement result carry out analysis and
Processing.
The eight passage radiometer Calibration Methods based on self calibration function, specific implementation step are as follows：
（1）Open pump laser, laser power stability device, photon counter detector, time-to-amplitude converter, photon
The power supply of the measuring apparatus such as counter；
（2）Scanning reflection mirror is switched to calibration light path.The between axlemolecules of fine adjustment half-wave plate and the light of nonlinear crystal
Direction of principal axis is consistent, sets the time of measuring of photon counting detector, effective coincidence counting value of record time-to-amplitude conversion output
With effective flip-flop number value；
（3）The optical axis direction of half-wave plate is rotated into 45 degree of angles, the time of measuring of photon counting detector is set, records the time
The unexpected coincidence counting value and background flip-flop number value of amplitude conversion output；
（4）Pass through（2）、（3）Obtain the shared optical circuit decay factor size of Radiation Observation and calibration mode；
（5）Pumping laser is closed, scanning reflection mirror is rotated by 90 ° and is switched to Radiation Observation light path, sets photon counting to visit
The time of measuring of device is surveyed, records the photon count value of each passage photon counting detector output；
（6）Will（4）、（5）The relevant parameter and known parameters of middle measurement are updated in eight passage radiometer measurement equations, are obtained
Obtain the radiation calibration coefficient of eight passage radiometers.
Claims (1)
- A kind of 1. eight passage radiometers for realizing self calibration function, it is characterised in that：Include observation light path, observe in light path according to It is secondary to be provided with relative photon generation module, scan module module；The relative photon generation module includes the laser set gradually Device, the polarizer, half-wave plate, laser power stability device, condenser lens, nonlinear crystal and collimation lens, described laser The pumping laser that wavelength is 355nm is produced, generation linearly polarized light to the rear is played by the polarizer, is produced after laser power stability device Stable laser beam, the center of nonlinear crystal is converged to by over-focusing lens, is meeting phase-matching condition In the case of, the broadband relative photon spectrum of spontaneous radiation is produced, the directional light of collimation is produced after collimated lens；The scanning Motor module includes scanning reflection mirror, and eight passage radiometers are switched into Radiation Observation pattern and calibration mode respectively respectively, swept Retouch motor module scanning reflection mirror work when reflected light path on be sequentially provided with multiplexing look in the distance module, collimated light path module, point Light and Path of Convergent Rays module, photodetection and signal processing module；The cut-off filter for being multiplexed module of looking in the distance and including setting gradually Mating plate, preposition diaphragm, Path of Convergent Rays, speculum and field stop, on the one hand it is used for the observation visual field for determining eight passage radiometers Size, on the other hand ensure that Radiation Observation pattern and calibration mode have common transmission light path；The collimated light path module be by The divergent beams exported at field stop are converted to directional light；The light splitting and Path of Convergent Rays are by eight wavelength by color separation film Relative photon light source be spatially separating, incided by Path of Convergent Rays in corresponding photon counting detector；The photoelectricity Detection and signal processing module include the photoelectric detection module being sequentially connected, meet detecting module and signal processing module；Light Electric detecting module is that photon signal is converted into electric impulse signal, the relative photon signal of eight wave bands using photon counting detector Eight road photon counting detectors are respectively adopted to be detected；It is to pass through the Transistor-Transistor Logic level signal after shaping pulse to meet detecting module Time-to-amplitude converter is detected；Signal processing module be record coincidence counting, unexpected coincidence counting, trigger port count, Trigger port dark counting, and counting and the dark counting of eight road photon counting detectors are recorded during Radiation Observation.
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| CN106482830A (en) * | 2016-09-29 | 2017-03-08 | 清华大学 | A kind of calibration system of the photon counter based on standard light source and method |
| CN106500591B (en) * | 2016-12-26 | 2018-12-11 | 哈尔滨工程大学 | A kind of integrated form multiband Michelson's interferometer |
| CN106645030B (en) * | 2016-12-26 | 2019-03-05 | 哈尔滨工程大学 | A kind of integrated form multiband Mach-Zehnder interferometer and application method |
| CN110736540B (en) * | 2019-09-18 | 2021-06-22 | 中国科学院合肥物质科学研究院 | 266nm pumped relevant photon self-calibration solar spectral irradiance instrument |
| CN111953338A (en) * | 2020-09-09 | 2020-11-17 | 绵阳市维博电子有限责任公司 | Real-time low-power-consumption integrated nuclear signal forming counting circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6147747A (en) * | 1997-08-22 | 2000-11-14 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Lidar remote sensing system |
| CN101561318A (en) * | 2008-04-16 | 2009-10-21 | 弗卢克公司 | Radiometer and temperature compensation system |
| CN104634742A (en) * | 2015-02-04 | 2015-05-20 | 中国科学院合肥物质科学研究院 | Optical path of multispectral polarization scanning radiometer based on reflecting telescope system |
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| JP4152054B2 (en) * | 2000-03-23 | 2008-09-17 | 富士フイルム株式会社 | Image reading device |
| EP2662674A3 (en) * | 2007-01-19 | 2014-06-25 | The General Hospital Corporation | Rotating disk reflection for fast wavelength scanning of dispersed broadbend light |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6147747A (en) * | 1997-08-22 | 2000-11-14 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Lidar remote sensing system |
| CN101561318A (en) * | 2008-04-16 | 2009-10-21 | 弗卢克公司 | Radiometer and temperature compensation system |
| CN104634742A (en) * | 2015-02-04 | 2015-05-20 | 中国科学院合肥物质科学研究院 | Optical path of multispectral polarization scanning radiometer based on reflecting telescope system |
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