CN108387313A - Based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric - Google Patents
Based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric Download PDFInfo
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- G—PHYSICS
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- 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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- 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
Abstract
The invention discloses a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric, include relative photon source module, rotating scanning mirrors, without burnt telescope light path module, dichroscope, binary channels pumps Xanthophyll cycle light path module, signal light collection light path module, idle light collection light path module, two-way meet device and control computer.Relative photon source module provides " without tracing to the source " calibration based on transition effects under I class Spontaneous Parametric for the present invention, rotating scanning mirrors rotate clockwise 90 ° of switchings for realizing self calibration function and target emanation information observing function respectively, and a kind of self-alignment absolute spectral radiometer is realized according to this design concept.This self-alignment absolute spectral radiometer is with important application prospects in optical radiation measurement, optical radiation measurement standard are transmitted.
Description
Technical field
The present invention relates to optical radiation measurement, light radiation scaling and technical field of optical measurement, more particularly to one kind is based on certainly
Send out the absolute spectral radiometer of wide spectrum self calibration of parametric down conversion.
Background technology
Conversion refers to a kind of physical phenomenon generated after monochromatic pump light subflow pumped nonlinear crystal under Spontaneous Parametric.Enter
It penetrates photon and twin photon pairs is split into certain probability, two photons of lower conversion twin photon pairs and the frequency of pump light are abided by
Energy conservation relation is followed, the wave vector of three meets conservation of momentum relationship.The conservation of momentum and energy conservation relation constitute spontaneous ginseng
Phase-matching condition in the lower conversion of amount between pump light and nonlinear crystal.Certain phase-matching condition is designed and meets,
Required wide spectrum distribution can be generated.
An important application of the spontaneous parametric conversion physical phenomenon in optical metrology is to utilize spontaneous parametric conversion
Generated relative photon measures the absolute quantum efficiency of photon detector to high correlation over time and space.Mesh
The preceding domestic and international means that photon detector quantum efficiency is measured using this method are all to screen a pair of of relevant wavelength using optical filter,
It is only capable of measuring the detective quantum efficiency on two relevant wavelength points every time, if to measure the detector quantum on other wavelength
Efficiency then needs to readjust optical path, and replaces optical filter, duplicate measurements step.The above method not only obtains effective
Port number is limited, and process is complicated, therefore more rests on experimental study, the Shortcomings in terms of functionization.If logical
The full collection that required spectral coverage relative photon is realized in optical design is crossed, passes through dispersion system and realizes continuous spectrum scanning survey, energy
Enough quantum efficiency calibrations that photon detector is realized in full spectral coverage range, will there is tremendous increase in terms of practicability.
Spectral radiometer has important application in optical radiation measurement, and the spectral radiometer by calibration can be used as and visit
Measurement equipment obtains the accurate light radiation information of target.In light radiation scaling field, the spectral radiometer by calibration can also fill
When transmitting radiometer, the transmission of quantity value of radiation benchmark is realized.
Principle is calibrated according to relative photon, essence is based on the basic physics effect such as quantum mechanics, independent of first
Grade benchmark radiation magnitude, such as the power standard of low temperature absolute radiometer, phase point black matrix absolute radiation magnitude standard etc., from
Belong to the calibrating method " without tracing to the source " theoretically.Due to reducing the link of radiation transmission of quantity value, be conducive to calibration precision
It is further promoted, there is significant application value in light radiation scaling field.
If by relative photon robot scaling equipment and spectral radiometer functional unification, it may be implemented to have both observation and calibration be double
The self calibration radiometer of operating mode.It is capable of the decay of regular real time calibration radiometer optical circuit, realizes the absolute of radiometer
" without tracing to the source " calibration.By engineering Integration Design, radiometer itself can be carried out as mobile absolute standard radiometer
Transmission of quantity value, this is an important progress in light radiation scaling field.
Invention content
The object of the invention is exactly to be provided a kind of based on the wide range converted under Spontaneous Parametric to make up the defect of prior art
The section absolute spectral radiometer of self calibration, has both observation and self calibration function.For observing function, which can be used as observation
Equipment obtains the absolute spectroradiometric quantity value information of target, can also be used as transmission radiometer, realizes the transmission of radiation magnitude.Just
For self calibration function, which is based on converting basic physics effect under Spontaneous Parametric, can carry out absolute " without tracing to the source "
Calibration.Self calibration function can ensure equipment periodic calibration calibration coefficient, provide accurately radiation magnitude observed result in real time.
The present invention is achieved by the following technical solutions：
A kind of includes relative photon source module based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
Rotating scanning mirrors, without burnt telescope light path module, dichroscope, binary channels pumps Xanthophyll cycle light path module, signal gloss
Collect light path module, idle light collection light path module, two-way meets device and control computer.The equipment have in self calibration pattern and
Two kinds of operating modes of observation mode.Under self calibration pattern, the transmission path of light beam is relative photon source module successively, and rotation is swept
Reflection is retouched, without burnt telescope light path module and dichroscope, light path is divided into two bundles after dichroscope, passes through binary channels all the way
Enter signal light acquisition light path module after pumping a channel of Xanthophyll cycle light path module, another way presses down by binary channels pump light
Enter idle light behind another channel of light path module processed and acquires light path module, signal light collection light path module and idle light collection
The signal of light path module enters multichannel and meets device progress photon reading and meet reading acquisition, soft by control computer host computer
Part calculates channel response degree and store calibration result.Under observation mode, the transmission path of light beam is rotation sweep reflection successively,
Without burnt telescope light path module, dichroscope, light path is divided into two bundles after dichroscope, is passed through binary channels pump light all the way and is pressed down
Enter signal light behind one channel of light path module processed and acquire light path module, another way pumps Xanthophyll cycle light path mould by binary channels
Enter idle light behind another channel of block and acquires light path module, signal light collection light path module and idle light collection light path module
Signal enter multichannel meet device carry out photon reading acquisition, observed result is shown by control computer.
The self calibration pattern realizes the channel response degree of signal optical channel and idle optical channel using relative photon source
" without tracing to the source " calibration.
Pumping laser is equipped in the light path of the relative photon source module successively, the polarizer, half-wave plate, laser power is steady
Determine device, nonlinear crystal, relative photon collimating mirror, light path matching beam expanding lens, light path folding speculum.Pumping laser is by being polarized
The polarization state of pumping laser is changed into linearly polarized light after device.Enter nonlinear crystal after half-wave plate and generates the spontaneous ginseng of I class
The lower conversion of amount, generates the relative photon of wide spectrum distribution, after relative photon collimating mirror collimation, by light path match beam expanding lens into
Row light path matches, then enters subsequent optical path by light path folding speculum.The effect of half-wave plate is to change the linear polarization of pump light
State, and then realize, release the matching condition converted under I class Spontaneous Parametric, realize the opening and closing in relative photon source.
The rotating scanning mirrors are controlled by motor and are rotated, and when rotating mirror rotates clockwise 90 °, are realized and are seen
Survey the switching with self calibration function light path.
It is described without off axis paraboloid mirror primary mirror, physical optical stop, off axis paraboloid mirror are equipped in burnt telescope light path module successively
Secondary mirror.Physical optical stop is used as the field stop of limiting observation visual field under observation mode；Under self calibration pattern, as the veiling glare that disappears
Diaphragm.
Wide spectrum relative photon light beam is divided into the two-way light beam of two spectrum ranges by the dichroscope, all the way light beam
Behind a channel by binary channels pump light suppression module, entering signal light collection light path module；Another way light beam is by double
After channel pumps another channel of Xanthophyll cycle module, into idle optical detection light path module.
The binary channels pump light suppression module is divided into two channels, and two channel lights are mutually perpendicular to, L-shaped point
Cloth.The configuration of two pass elements is identical, leads to dielectric coating filter and a piece of absorption long wave by the identical long wave of two panels
Pass filter forms.Lead to dielectric filter by long wave and realizes that the cut-off of nearly 6 ~ 7 magnitudes of pump light intensities is eliminated, absorption length
Wave pass filter realizes that the absorption of residual pump light is eliminated.
The signal light collection light path module is identical with idle light light path module light path form, is set successively in light path
Set off axis paraboloid mirror coupling mirror, light path folding speculum, monochromator and photon counting detector.The remittance of off axis paraboloid mirror coupling mirror
Focal beam numerical aperture and the matching of the work aperture of monochromator.
The monochromator is double monochromator, is mainly used for tuning wavelength output, realizes Subsection spectrum scanning survey.Certainly
Under calibration mode, monochromator will through the filtered wide spectrum relative photon dispersion of dichroscope, through the sweep mechanism in monochromator,
Realize the calibration of Subsection spectrum scanning.Under observation mode, monochromator will be through the filtered wide spectrum target emanation of dichroscope
Dispersion realizes the output detection of Subsection spectrum scanning through the sweep mechanism in monochromator.
The monochromator operating mode is different with the working method under observation mode in self calibration pattern.In self calibration mould
Under formula, the output wavelength of signal light collection light path module and the monochromator in idle light light path module light path must be according to spontaneous ginseng
Amount is lower to convert the stringent cross-correlation of conservation of energy matching condition.Under observation mode, two monochromators can freely work, and combine and cover
Service band needed for lid.
In the signal light collection light path module and idle optical detection light path module, respective photon counting detector is defeated
Go out to be signally attached to the same two-way to meet on device.Signal light collection light path module and idle light light path module acquire relative photon
Signal meets the number of photons on each road of device interpretation by two-way and meets number, this is calculated to the channel response in relevant wavelength
Degree.
It is an advantage of the invention that：The present invention realizes the correlation based on transfer principle under Spontaneous Parametric by optical design
The relative photon of photon scaling system is collected entirely, is conducive to the signal noise ratio level for improving calibration.The list being divided by continuous dispersion
The calibration of quantum efficiency on the arbitrary wavelength of photon counting detector is realized in the introducing of color instrument system.Light path is converted by setting, it is real
Self calibration is showed and has observed the integrated of light path, and then realized a kind of radioactivity detection, identificationm, and computation that itself magnitude is absolute, in light radiation
It can be used as high-precision spectral radiometer in observation, and scanned by subdivided spectral, can get the observed result of EO-1 hyperion, favorably
In raising accuracy of observation；In light radiation scaling, it can be used as and transmit radiometer realization radiation transmission of quantity value, the two is in optical remote sensing
In all have important application value.
Description of the drawings
Fig. 1 is the self calibration light path schematic diagram of the present invention.
Fig. 2 is the observation light path schematic diagram of the present invention.
Specific implementation mode
As shown in Figure 1 based on the absolute spectral radiometer specific implementation mode of wide spectrum self calibration converted under Spontaneous Parametric,
Include relative photon source module 100, rotating scanning mirrors 200, without burnt telescope light path module 300, dichroscope 400,
Binary channels pumps Xanthophyll cycle light path module 500, signal light collection light path module 600, idle light collection light path module 700, two-way
Meet device 800 and control computer 900.
（1）The working method of self calibration pattern
Under self calibration pattern, with reference to figure 1,200 mirror face turning of rotating scanning mirrors is to towards relative photon source module 100 1
Relative photon reference source is introduced into subsequent optical path by side.Relative photon source module is by pump laser 101, the polarizer 102,
Half-wave plate 103, laser power stability device 104, nonlinear crystal 105, relative photon collimating mirror 106, light path match beam expanding lens 107
It is formed with light path folding speculum 108.The one-wavelength laser that pump laser 101 is emitted retrodeviates polarization state adjustment by the polarizer 102
For linearly polarized light, when linearly polarized light enters half-wave plate 103, rotation half-wave plate, which changes its optical axis direction, can change linearly polarized light
Light vector direction, and then ensure to meet or be unsatisfactory for switch condition under I class Spontaneous Parametric, Jin Ershi after entering in nonlinear crystal
The opening and closing of physical effect are converted under existing I class Spontaneous Parametrics.Laser after half-wave plate enters laser power stability device
104, the intensity of laser is stablized, and then ensure the stability in the relative photon source subsequently generated.Laser is through laser power
After stabilizer 104 is stablized, into nonlinear crystal 105, if the state of half-wave plate meets conversion " unlatching " under I class Spontaneous Parametrics
State then generates transition effects under I class Spontaneous Parametrics inside nonlinear crystal 105, generates the relative photon ring of wide spectrum, phase
Photon ring is closed to export after the collimation of relative photon collimating mirror 106, after being expanded using light path matching beam expanding lens 107, by
Light path folding speculum 108 imports in subsequent optical path.The effect of relative photon collimating mirror 106 is collimation relative photon ring, convenient
Subsequent optical path collects the whole of relative photon.The effect of light path matching beam expanding lens 107 is changed through relative photon collimating mirror 106
The relative photon angle of divergence after collimation ensures that relative photon is consistent with the field angle of infinity target in observation light path, Jin Erfang
Just subsequent Common-path method.
It is incident on rotating scanning mirrors 200, rotates at this time after light path folding speculum 108 in relative photon source
Relative photon is imported into without burnt telescope by the minute surface of scanning reflection mirror 200 towards relative photon source module 100, through mirror-reflection
In module 300.Without burnt telescope module 300 by 303 groups of off axis paraboloid mirror primary mirror 301, diaphragm 302 and off-axis parabolic mirror
At.By 301 post-concentration of off axis paraboloid mirror primary mirror at diaphragm 302, the size of diaphragm 302 ensures relative photon in relative photon source
All by diaphragm, diaphragm for eliminating stray light is served as in the effect of diaphragm 302.Relative photon light beam is after diaphragm 302, through off-axis parabolic
After face secondary mirror 303 collimates, into subsequent optical path.
For relative photon light beam after without burnt telescope module 300, light beam is still collimated light beam, and beam size becomes smaller, has
Conducive to the reduction of subsequent optical component size.After relative photon light beam is incident on dichroscope 400, the relative photon light of wide spectrum
Beam is divided into two spectrum ranges, is all the way signal light spectrum range, and another wheel is idle light spectrum range.Signal light is through dichroic
After mirror 400 reflects, through the long wave pass filter 1 in binary channels pump light suppression module 500, long wave pass filter 2 522
After absorption long wave pass filter 523, entering signal light collection module.Long wave in binary channels pump light suppression module 500
Pass filter 1 is identical with 2 522 technical parameters, and effect is all off pump light.Long wave leads to dielectric coating filter
One 521 and 2 522 be in 45 ° of placements, is mutually perpendicular, and can avoid generating interference effect.Pumping laser is situated between by long wave is logical
Plasma membrane optical filter one 521 and 2 522 end after, still can residual fraction intensity can not further decay.Lead to medium membrane filtration in long wave
The absorption long wave pass filter 523 of 2 522 backend arrangement of mating plate, further absorbs remaining pump light.The signal of collimating status
After light entering signal light collection module 600, assembled after off axis paraboloid mirror coupling mirror 1, it is anti-by light path folding
After penetrating mirror 1, it will poly- signal light is introduced into monochromator 1, some signal light-wave of one 603 tuning operation of monochromator
Long, photon counting detector 1 detects the reading value under the signal light wavelength.After idle light is transmitted through dichroscope 400,
Through the long wave pass filter 3 511 in binary channels pump light suppression module 500, long wave pass filter 4 512 and absorption long wave
After pass filter 513, into idle light acquisition module 700.Long wave pass filter three in binary channels pump light suppression module 500
511 is identical with 4 512 technical parameters, and effect is all off pump light.Long wave leads to dielectric coating filter 3 511 and four
512 be in 45 ° of placements, is mutually perpendicular, and can avoid generating interference effect.Pumping laser leads to dielectric coating filter by long wave
3 511 and 4 512 cut-off after, still can residual fraction intensity can not further decay.After long wave leads to dielectric coating filter 4 512
End configures absorption long wave pass filter 513, further absorbs remaining pump light.The idle light of collimating status enters idle light
After acquisition module 700, assembled after off axis paraboloid mirror coupling mirror 2 701, after light path folding speculum 2 702,
The idle light of convergence is introduced into monochromator 2 703, some idle optical wavelength of 2 703 tuning operation of monochromator.Photon meter
Number detector 2 704 detects the reading value under the free time optical wavelength.Under self calibration pattern, monochromator 1 and monochromator two
The wavelength of 703 outputs is relative to each other.
The output signal one 605 and 2 705 of photon counting detector 1 and 2 704 is transferred to two-way and meets device 800
In, respective count value and coincidence counting value are obtained, measurement result is transferred to by connection 801 in control computer 900,
Real-time display measurement result in software in control computer 900.
（2）The working method of observation mode
Under observation mode, with reference to figure 2,200 mirror face turning of rotating scanning mirrors is to 000 side of object-oriented radiation, by mesh
Mark radiation 000 is introduced into without in burnt telescope module 300.Target emanation 000 is by without the off-axis throwing in burnt telescope module 300
For 301 post-concentration of object plane primary mirror at diaphragm 302, diaphragm 302 is used for the field angle size of limiting observation target, the work of diaphragm 302
With serving as field stop.Target emanation 000 is after diaphragm 302, after the collimation of off axis paraboloid mirror secondary mirror 303, into subsequent optical
Road.
Target emanation 000 is incident on after without burnt telescope module 300 on dichroscope 400, and dichroscope 400 will
Target emanation 000 is divided to for two spectrum ranges, and 000 light beam of target emanation reflected through dichroscope 400 is pumped to through binary channels
Long wave pass filter 1, long wave pass filter 2 522 in Xanthophyll cycle module 500 and absorption long wave pass filter 523
Afterwards, entering signal light collection module 600.Long wave pass filter 1, long wave in binary channels pump light suppression module 500 is logical
The effect of optical filter 2 522 and absorption long wave pass filter 523 is the pump light inhibited under self calibration pattern, in observation mode
Under, binary channels pump light suppression module 500 is simultaneously nonessential.It is total to the design of light path as a result of observation, self calibration pattern, is seeing
Under survey pattern, binary channels pump light suppression module 500 can influence spy of the wavelength less than 000 information of target emanation of pump wavelength
It surveys, if required 000 minimum wavelength of target emanation is more than pump wavelength, binary channels pump light suppression module 500 will not
Influence the observation of target.It is coupled into monochromator one after off axis paraboloid mirror coupling mirror 1, light path folding speculum 1
603, the arbitrary wavelength of one 603 tuning operation of monochromator, the acquisition reading of photon counting detector 1, and be transferred to through signal wire
Two-way meets in device 800.Through dichroscope 400 000 light beam of target emanation through in binary channels pump light suppression module 500
After long wave pass filter 3 511, long wave pass filter 4 512 and absorption long wave pass filter 513, into idle light collection mould
Block 700.It is coupled into monochromator 2 703, monochromator after off axis paraboloid mirror coupling mirror 2 701, light path folding speculum 2 702
The arbitrary wavelength of 2 703 tuning operations, the acquisition reading of photon counting detector 2 704, and be transferred to two-way through signal wire and meet device
In 800.
Two-way meets the reading that device 800 reads photon counting detector 1 and 2 704, is transferred to by connection 801
Control computer 900 obtains the radiation letter of the radiation 000 of target in conjunction with the responsiveness the calibration results obtained under self calibration pattern
Breath realizes the radiation information detection of target emanation 000.
Claims (10)
1. a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric, it is characterised in that：It include phase
It closes photon source module, rotating scanning mirrors, pump Xanthophyll cycle light path without burnt telescope light path module, dichroscope, binary channels
Module, signal light collection light path module, idle light collection light path module, two-way meet device and control computer, have self calibration
Two kinds of operating modes of pattern and observation mode：Under self calibration pattern, the transmission of light beam passes sequentially through relative photon source module, rotation
Turn scanning reflection, without burnt telescope light path module and dichroscope, light path is divided into two bundles after dichroscope, is passed through all the way double
Enter signal light behind one channel of channel pumping Xanthophyll cycle light path module and acquire light path module, another way is pumped by binary channels
Enter idle light behind another channel of Xanthophyll cycle light path module and acquires light path module, signal light collection light path module and idle light
The output signal for acquiring light path module meets device progress photon reading into two-way and meets reading acquisition, is calculated by controlling
Machine upper computer software calculates channel response degree and store calibration result；Under observation mode, the transmission of light beam passes sequentially through rotation
Scanning reflection, without burnt telescope light path module, dichroscope, light path is divided into two bundles after dichroscope, all the way pass through bilateral
Enter signal light behind one channel of road pumping Xanthophyll cycle light path module and acquire light path module, another way passes through binary channels pump light
Enter idle light acquisition light path module, signal light collection light path module and idle gloss after inhibiting another channel of light path module
The output signal for collecting light path module meets device progress photon reading acquisition into two-way, passes through control computer and shows that observation is tied
Fruit.
2. it is according to claim 1 a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
It is characterized in that：The relative photon source module includes the pump laser set gradually, the polarizer, half-wave plate, laser
Power stabilizer, nonlinear crystal, relative photon collimating mirror, light path matching beam expanding lens and light path folding speculum, the pump
The polarization state of pumping laser is changed into linearly polarized light by the pumping laser that Pu laser is sent out after the polarizer, linearly polarized light into
Enter half-wave plate, rotation half-wave plate, which changes its optical axis direction, can change the light vector direction of linearly polarized light, and then ensure to enter non-
Meet or be unsatisfactory for switch condition under I class Spontaneous Parametric after in linear crystal, and then realizes conversion physics effect under I class Spontaneous Parametrics
The opening and closing answered, rear laser enter laser power stability device, stablize to the intensity of laser, and then laser enters non-thread
Property crystal generate I class Spontaneous Parametric under convert, generate wide spectrum distribution relative photon, by relative photon collimating mirror collimate
Afterwards, light path matching is carried out by light path matching beam expanding lens, then subsequent optical path is entered by light path folding speculum.
3. it is according to claim 2 a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
It is characterized in that：The relative photon collimating mirror is using apochromatic transmission-type camera lens or uses Schwarzchild types
Reflecting light line structure.
4. it is according to claim 2 a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
It is characterized in that：The described light path matching beam expanding lens be without burnt light channel structure, using Galilean type beam expanding lens light channel structure or
Kepler-type beam expanding lens light channel structure.
5. it is according to claim 1 a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
It is characterized in that：The rotating scanning mirrors are controlled by motor and are rotated, real when rotating mirror rotates clockwise 90 °
The now switching of observation and self calibration function light path.
6. it is according to claim 1 a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
It is characterized in that：It is described without off axis paraboloid mirror primary mirror, physical optical stop are equipped in burnt telescope light path module successively and off-axis is thrown
Object plane secondary mirror, relative photon source is by off axis paraboloid mirror primary mirror post-concentration at diaphragm, and relative photon light beam is after diaphragm, warp
After off axis paraboloid mirror secondary mirror collimation, into subsequent optical path.
7. it is according to claim 1 a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
It is characterized in that：The binary channels pump light suppression module is divided into two channels, and two channel lights are mutually perpendicular to, L-shaped
Distribution, the configuration of two pass elements is identical, leads to dielectric coating filter and a piece of absorption by the identical long wave of two panels
Long wave pass filter forms, and it is in 45 ° of placements that the two panels long wave, which leads to dielectric coating filter, leads to dielectric filter by long wave
Realize that the cut-off of the nearly 6-7 magnitude of pump light intensities is eliminated, absorption long wave pass filter realizes that the absorption of residual pump light disappears
It removes.
8. it is according to claim 1 a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
It is characterized in that：The signal light collection light path module is identical with idle light light path module light path form, the light of the two
Road sets gradually off axis paraboloid mirror coupling mirror, light path folding speculum, monochromator and photon counting detector, off-axis parabolic
The converging beam numerical aperture of face coupling mirror and the work aperture matching of monochromator.
9. it is according to claim 8 a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
It is characterized in that：The monochromator is double monochromator, is exported for tuning wavelength, realizes Subsection spectrum scanning survey, certainly
Under calibration mode, monochromator will through the filtered wide spectrum relative photon dispersion of dichroscope, through the sweep mechanism in monochromator,
Realize the calibration of Subsection spectrum scanning；Under observation mode, monochromator will be through the filtered wide spectrum target emanation of dichroscope
Dispersion realizes the output detection of Subsection spectrum scanning through the sweep mechanism in monochromator.
10. it is according to claim 8 a kind of based on the absolute spectral radiometer of wide spectrum self calibration converted under Spontaneous Parametric,
It is characterized in that：In the signal light collection light path module and idle optical detection light path module, respective photon counting detection
Device output signal is connected to the same two-way and meets on device, and signal light collection light path module is related to the acquisition of idle light light path module
Photon signal meets the number of photons on each road of interpretation by two-way and meets number, this is calculated and is rung to the channel in relevant wavelength
Response.
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| CN110736540A (en) * | 2019-09-18 | 2020-01-31 | 中国科学院合肥物质科学研究院 | Relevant photon self-calibration solar spectral irradiance instrument with 266nm pumping |
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| CN110736540A (en) * | 2019-09-18 | 2020-01-31 | 中国科学院合肥物质科学研究院 | Relevant photon self-calibration solar spectral irradiance instrument with 266nm pumping |
| 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 |
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