CN107576390A - A kind of atomic weak multiband infrared radiation degree measuring system and method - Google Patents
A kind of atomic weak multiband infrared radiation degree measuring system and method Download PDFInfo
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Abstract
The invention discloses a kind of atomic weak multiband infrared radiation degree measuring system, including optical system, signal detection module, data acquisition and processing system and multi-dimensional adjustment platform, multi-dimensional adjustment platform is provided with vacuum and low temperature cabin, optical system and signal detection module are separately positioned in vacuum and low temperature cabin, optical system includes infrared window, off axis paraboloid mirror primary mirror, off axis paraboloid mirror secondary mirror and parabola focus lamp, off-axis total-light-reflection conversion is carried out to tested light beam, and the tested light beam after conversion is focused in signal detection module；Signal detection module, for detecting tested light beam；Data acquisition and processing system, for controlling the optical system and signal detection module, and receive the signal that the signal detection module detects and processing.The present invention solves the problems, such as the accurate measurement of atomic weak infrared radiation degree using vacuum and low temperature cabin, off-axis be all-trans optical system and single-point infrared detector.
Description
Technical field
The invention belongs to optical radiation fields of measurement, and in particular to a kind of atomic weak multiband infrared radiation degree measuring system
And method.
Background technology
Infrared target simulator is the important component in infrared semi-matter simulating system, is the hair with missilery
Open up and grow up.Infrared target simulator is mainly by radiation source, diaphragm, collimation projection optical system and display system group
Into, its collimated light beam provided, the radiation source at a certain distance from can simulating.The use of infrared target simulator is more next at this stage
It is more, requirement to its performance also more and more higher.Each part of infrared target simulator is in the pre-assembly all by tight
The test of lattice, but because existing rigging error makes all technical of simulator certain deviation be present after combining, so
Also need to calibrate it.In addition, simulator during routine use by environmental factors such as device aging and dusts
Influence, its performance indications can not stable for extended periods of time, so also need to carry out periodic calibration to it with Special testing device, and red
Irradiation level at outer target simulator emergent pupil is a very important Performance Evaluating Indexes.
Accurate measurement to infrared radiation degree is always a difficult point, mainly there is two methods at present, and one kind is to compare to survey
The method of amount, reference blackbody and target simulator are alternately measured using standard irradiance meter, its principle is to utilize standard blackbody
Target simulator is calibrated, makes standard blackbody irradiance level identical with target simulator irradiance level, then Standard Ratio meter
Output signal is identical twice.Another is absolute method of measurement, using the irradiation level crossed by standard collimated telescope source calibration
Meter, a set of absolute irradiance meter is obtained in Laboratory Calibration, is then arrived scene and is completed measurement.
The domestic and international existing infrared radiation degree meter succeeded in developing has been able to reach higher measurement accuracy, its function ratio
It is more powerful, using light splitting spectral technology, the irradiation level of any wavelength can be measured, but its often cost is very high, equipment
Complexity, use very inconvenient.Most typical SR-5000 infrared spectroradio meters, principle are based on gradual filter (CVF)
High-precision infrared spectral radiant light splitting technology, but yet there is be difficult to meet to be less than 10-10W/cm2The faint infrared radiation of magnitude
The problem of spending measurement request.
In summary, in the prior art for less than 10-10W/cm2The problem of faint infrared radiation degree of magnitude measures, still lacks
Weary effective solution.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of atomic weak multiband infrared radiation degree measurement
System and method, with reference to vacuum and low temperature cabin, off-axis be all-trans optical system and single-point infrared detector, solve atomic weak infrared at present
The accurate measurement problem of irradiation level.
The technical solution adopted in the present invention is：
A kind of atomic weak multiband infrared radiation degree measuring system, including optical system, signal detection module, data acquisition
And processing system and multi-dimensional adjustment platform, the multi-dimensional adjustment platform are provided with vacuum and low temperature cabin, the optical system and signal
Detecting module is separately positioned in the vacuum and low temperature cabin, the optical system, for carrying out off-axis total-light-reflection to tested light beam
Conversion, and the tested light beam after conversion is focused in signal detection module；The signal detection module, for detecting by light-metering
Beam；The data acquisition and processing system, for controlling the optical system and signal detection module, and receive the signal and visit
Survey the signal that module detects and processing.
Further, the signal detection module uses refrigeration mode single-point infrared detector.
Further, the optical system includes infrared window, off axis paraboloid mirror primary mirror, off axis paraboloid mirror secondary mirror and parabolic
Face focus lamp, the infrared window are inclined on the shell wall in vacuum and low temperature cabin, the off axis paraboloid mirror primary mirror, off-axis parabolic
Face secondary mirror and parabola focus lamp are arranged in vacuum and low temperature cabin；It is provided between infrared window and the off axis paraboloid mirror primary mirror
Diaphragm for eliminating stray light and aperture diaphragm, the focal point of the off axis paraboloid mirror primary mirror and off axis paraboloid mirror secondary mirror are provided with visual field light
Door screen, narrow band pass filter and chopper are provided between the off axis paraboloid mirror secondary mirror and parabola focus lamp；Tested light beam is through red
Outer window enters in vacuum and low temperature cabin, incides off axis paraboloid mirror primary mirror after aperture diaphragm and diaphragm for eliminating stray light, then pass through
Off axis paraboloid mirror primary mirror and field stop reflex to off axis paraboloid mirror secondary mirror, and off axis paraboloid mirror secondary mirror carries out again accurate to light beam
Directly, and after being filtered by narrow band pass filter and chopper parabola focus lamp is incided, gathers light beam by parabola focus lamp
It is burnt on infrared detector.
Further, aluminium conjunction is respectively adopted in the off axis paraboloid mirror primary mirror, off axis paraboloid mirror secondary mirror and parabola focus lamp
Made of gold, and it is coated with metallic reflective coating and medium protection film.
Further, the data acquisition and processing system includes master controller, the first stepper motor, the second stepping electricity
Machine, direct current generator, filter amplification circuit, interface circuit and computer；First stepper motor and the second stepper motor it is defeated
Enter end to be connected with master controller by stepper motor driving circuit respectively, the output end and field stop of first stepper motor
Connection, the output end of second stepper motor are connected with narrow band pass filter wheel, and the input of the direct current generator passes through numeral
Phase-locked loop circuit is connected with master controller, and the output end of the direct current generator is connected with chopper；The master controller passes through filter
Ripple amplifying circuit is connected with infrared detector, and the master controller is connected by interface circuit with computer.
Further, in addition to measured target sighting system, the measured target sighting system are arranged on infrared window
Front side, the measured target sighting system include turn back plane mirror, zoom lens and ccd detector, are tested light beam irradiation
To after infrared window, it is refracted to and turns back on plane mirror, after plane mirror of turning back reflexes to zoom lens, by becomes
Focus lens are transmitted on ccd detector.
Further, in addition to vacuum and low temperature system, the vacuum and low temperature system include vacuum cavity, the vacuum cavity
It is interior to be provided with aluminum cold drawing, optical component is installed, the aluminum cold drawing is connected with Cryo Refrigerator, is led on the aluminum cold drawing
Cross Cryo Refrigerator and provide cold for aluminum cold drawing.
Further, in addition to liquid nitrogen filling system and pumped vacuum systems, the liquid nitrogen filling system, for controlling vacuum
Liquid nitrogen level in low temperature chamber；The pumped vacuum systems is molecule pump assembly, for vacuum in vacuum and low temperature cabin to be brought up to
10-5Pa magnitudes.
A kind of method of work of atomic weak multiband infrared radiation degree measuring system, comprises the following steps：
(1) liquid nitrogen refrigerating is filled into vacuum and low temperature cabin by liquid nitrogen filling system, it is by pumped vacuum systems that vacuum is low
Vacuum brings up to 10 in warm cabin-5Pa magnitudes；
(2) light beam is tested through infrared window to enter in vacuum and low temperature cabin, through reached after diaphragm for eliminating stray light and aperture diaphragm from
Axle parabola primary mirror, off axis paraboloid mirror secondary mirror is reached through off axis paraboloid mirror primary mirror and field stop, off axis paraboloid mirror secondary mirror is light
Beam re-start collimation after by narrow band pass filter wheel and chopper after, reach parabola focus lamp, gather through parabola focus lamp
It is burnt on single-point infrared detector；
(3) after the signal detected is filtered and amplified by filter amplification circuit by single-point infrared detector, it is transferred to master
The signal of collection is transferred to computer by controller, master controller by interface circuit；
(4) computer is handled the signal of reception, and is shown.
Further, in the step (2), field stop is adjusted by the stepper motor of main controller controls first, and lead to
The second step motor control narrow band pass filter wheel rotation rotary test wavelength is crossed, master controller is controlled by digital PLL circuit
Direct current generator, make the stable measured signal of chopper output frequency.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) the application uses vacuum and low temperature cabin, optical system and infrared detector, realizes the faint infrared spoke of tested light beam
Illumination photometry, vacuum insulation environment is provided for the cooling of optical component and temperature control by vacuum and low temperature cabin, it is sensitive to improve measurement
Degree；Tested light beam is passed through by infrared window, diaphragm for eliminating stray light and aperture diaphragm, off axis paraboloid mirror primary mirror by optical system, regarded
Focused on after field diaphragm, off axis paraboloid mirror secondary mirror, narrow band pass filter wheel, chopper and parabola focus lamp on infrared detector,
Tested light beam is measured using refrigeration mode single-point infrared detector, signal is extracted by data acquisition and processing system, it is complete
Into faint infrared radiation measurement；
(2) the application adds diaphragm for eliminating stray light in the light path of optical system, at the same using off axis paraboloid mirror primary mirror and from
Axle parabola secondary mirror optical beam transformation makes light beam diminish, and light beam is filtered using narrow band pass filter wheel and chopper；From
The focal point of axle parabola primary mirror and off axis paraboloid mirror secondary mirror uses field stop, carries out light beam selection；
(3) the application using can multi-dimensional adjustment platform infrared radiation degree measuring system and the docking location of tested light beam are entered
Row adjustment, infrared radiation degree measuring system can be also placed on stroller, facilitate different places to use；Eliminated using vacuum and low temperature system
The influence of infrared background noise, the heat radiation inside infrared radiation degree measuring system is reduced, improve detectivity；
(4) the application is using the tested light beam of measured target sighting system observation, it is ensured that is measured light beam and fully incides letter
On the infrared detector of number detecting module.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is the structural representation of atomic weak multiband infrared radiation degree measuring system disclosed in the embodiment of the present invention；
Fig. 2 is the structural representation of optical system disclosed in the embodiment of the present invention；
Fig. 3 is the structured flowchart of data acquisition and processing system disclosed in the embodiment of the present invention；
Fig. 4 is the structural representation of measured target sighting system disclosed in the embodiment of the present invention；
Wherein, 1, optical system, 11, infrared window, 12, diaphragm for eliminating stray light and aperture diaphragm, 13, off axis paraboloid mirror master
Mirror, 14, field stop, 15, off axis paraboloid mirror secondary mirror, 16, narrow band pass filter, 17, chopper, 18, parabola focus lamp, 19,
Infrared detector, 2, signal detection module, 3, data acquisition and processing system, 31, master controller, 32, driving stepper motor electricity
Road, the 33, first stepper motor, the 34, second stepper motor, 35, digital PLL circuit, 36, direct current generator, 37, filter and amplification
Circuit, 38, interface circuit, 39, computer, 4, vacuum and low temperature system, 5, measured target sighting system, 6, multi-dimensional adjustment platform,
7th, it is tested light beam, 8, vacuum and low temperature cabin.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, presence in the prior art can not meet to be less than 10-10W/cm2 magnitudes are faint infrared
The deficiency of irradiance measurement requirement, in order to solve technical problem as above, present applicant proposes a kind of atomic weak multiband is infrared
Irradiance measuring system and method.
In a kind of typical embodiment of the application, as shown in Figure 1, there is provided a kind of atomic weak multiband infrared radiation
Measuring system is spent, the measuring system includes optical system 1, signal detection module 2, data acquisition and processing system 3, vacuum and low temperature
System 4, measured target sighting system 5 and multi-dimensional adjustment platform 6, the multi-dimensional adjustment platform 6 are provided with vacuum and low temperature cabin 8, lead to
Cross the docking location that multi-dimensional adjustment platform adjusts infrared spoke irradiance measuring system and tested light beam, infrared radiation degree measuring system
Also stroller can be placed in, facilitates different places to use；The optical system 1 and signal detection module 2 are separately positioned on the vacuum
In low temperature chamber 8, the optical system 1, for entering line translation to tested light beam, and the tested light beam after conversion is focused on into signal
On detecting module；The signal detection module 2, for detecting measured light beam；The data acquisition and processing system 3, is used for
The optical system and signal detection module are controlled, and receives the signal that the signal detection module detects and processing.
The atomic weak multiband infrared radiation degree measuring system that the present embodiment proposes, with reference to low temperature, it is off-axis be all-trans optics and
Single-point infrared detector is designed, and is tested light beam 7 and is entered by infrared window 11 in vacuum and low temperature cabin 8, vacuum and low temperature cabin 8 is
The cooling of optical component and temperature control provide vacuum insulation environment, and the sealed window material in vacuum and low temperature cabin 8 uses ZnSe, ensure
Infrared band transmitance, is easy to carry out optic test to system in cabin, is then tested light beam and incides optical system, optical system
Tested optical beam transformation is realized, the tested light beam after conversion is focused in signal detection module, signal detection module will detect
Signal be transferred to data acquisition and processing system, faint infrared radiation measurement is completed by data acquisition and processing system.
In the another embodiment of the application, the signal detection module 2 is used to carry out the infra-red radiation for being tested light beam
Detection and calibration, are Point Target Detection, do not pursue the performance indications such as resolution ratio, but due to the high mutually reply detector of sensitivity requirement
There is higher detectivity requirement, thus it is red from long wave in the big pixel single-point of J15D12 type refrigeration mode mercury cadmium tellurides of JUDSON companies
External detector 19, refrigeration mode detector is high with respect to non-refrigeration type detector sensitivity, and single point detector then has than bin detector
There is advantage economic, that there are bigger image planes, its bin size is up to 0.5mm × 0.5mm.
In another embodiment of the application, as shown in Fig. 2 the optical system includes infrared window 11, off axis paraboloid mirror
Primary mirror 13, off axis paraboloid mirror secondary mirror 15 and parabola focus lamp 18, the infrared window 11 are inclined at vacuum and low temperature cabin 8
On shell wall, reduce the influence of light beam multiple reflections；The off axis paraboloid mirror primary mirror 13, off axis paraboloid mirror secondary mirror 15 and parabola gather
Burnt mirror 18 is arranged in vacuum and low temperature cabin 8；The veiling glare light that disappears is provided between the infrared window 11 and off axis paraboloid mirror primary mirror 13
Door screen and aperture diaphragm 12, the clear aperture of the diaphragm for eliminating stray light and aperture diaphragm 12 is 70mm；The off axis paraboloid mirror primary mirror
13 and the focal point of off axis paraboloid mirror secondary mirror 15 be provided with field stop 14, realize and tested under different viewing conditions, field stop
14 standard field of view determined are 0.04 °, and the field stop 14 determines which light can be with entering signal detecting module；It is described off-axis
The bore of parabola secondary mirror 15 is 15mm；Arrowband filter is provided between the off axis paraboloid mirror secondary mirror 15 and parabola focus lamp 18
Mating plate 16 and chopper 17, the centre wavelength of the optical filter 16 is respectively 3.05 μm, 4.3 μm, 5.25 μm, 7.9 μm, 9.04 μm,
10.6 μm, 12.4 μm, spectral bandwidth is respectively 100nm, 125nm, 125nm, 175nm, 195nm, 240nm, 180nm, by narrow
Come to carry out broadband light splitting to 3 μm~12 μm of infra-red radiation with optical filter, simple in construction, stability is good.
In the present embodiment, be tested light beam and enter through infrared window 11 in vacuum and low temperature cabin, through a series of aperture diaphragm with
After diaphragm for eliminating stray light 12, off axis paraboloid mirror primary mirror 13 is reached, after off axis paraboloid mirror primary mirror 13 and field stop 14, is reached off-axis
Parabola secondary mirror 15, off axis paraboloid mirror secondary mirror 15 are filtered by narrow band pass filter 16 and chopper 17 after light beam is re-started into collimation
After light, parabola focus lamp is reached, focuses on the tested light beam after optical filtering on infrared detector 19 through parabola focus lamp.
In the present embodiment, by setting the aperture diaphragm and field stop of relative aperture very little, limitation in vacuum and low temperature cabin 8
Reach the thermal background emission of signal detection module, reduce signal detection module noise.
Aluminium alloy is respectively adopted in above-mentioned off axis paraboloid mirror primary mirror 13, off axis paraboloid mirror secondary mirror 15 and parabola focus lamp 18
It is manufactured, and it is coated with metallic reflective coating and medium protection film.
In the another embodiment of the application, as shown in figure 3, above-mentioned data acquisition and processing system 3 includes master controller
31st, the first stepper motor 33, the second stepper motor 34, direct current generator 36, filter amplification circuit 37, interface circuit 38 and computer
39；The input of the stepper motor 34 of first stepper motor 33 and second passes through stepper motor driving circuit 32 and master control respectively
Device 31 processed is connected, and the output end of first stepper motor 33 is connected with field stop 14, second stepper motor 34 it is defeated
Go out end to be connected with narrow band pass filter wheel 16, the input of the direct current generator 36 passes through digital PLL circuit 35 and master controller
21 connections, the output end of the direct current generator 36 are connected with chopper 17；The master controller 31 passes through filter amplification circuit 37
It is connected with infrared detector 19, the master controller 31 is connected by interface circuit 38 with computer 39.
In the present embodiment, master controller 31 drives the first stepper motor 33 and second step by stepper motor driving circuit 32
Stepper motor 34 is worked, and field stop 14 is adjusted by the first stepper motor 33, and narrow-band-filter is controlled by the second stepper motor 34
The rotation selection test wavelength of piece wheel 16, meanwhile, master controller 31 controls direct current generator 36 by digital PLL circuit 35, makes to cut
The stable measured signal of the output frequency of light device 17；Infrared detector 19 filters the signal detected by filter amplification circuit 37
The data received are sent to computer 39 by interface circuit 38 with being transmitted after amplification to master controller 31, master controller,
Faint infrared radiation degree is calculated by computer 39.
In the another embodiment of the application, as shown in figure 4, above-mentioned measured target sighting system 5 is arranged on infrared window
The front side of mouth 11, the measured target sighting system 5 include turn back plane mirror 51, zoom lens 52 and ccd detector 53,
After tested light beam is irradiated to infrared window 11, it is refracted to and turns back on plane mirror 51, plane mirror 51 reflexes to through turning back
After zoom lens 52, it is transmitted to through zoom lens 52 on ccd detector 53, measured target is observed by ccd detector, it is ensured that quilt
Measuring beam is fully incided on the infrared detector 19 of signal detection module.
In the another embodiment of the application, in order to eliminate the influence of infrared background noise, above-mentioned vacuum and low temperature system 4
Main body be a vacuum cavity, is provided with aluminum cold drawing in the vacuum cavity, optical component is installed on the aluminum cold drawing,
The aluminum cold drawing is connected with Cryo Refrigerator, provides cold for aluminum cold drawing by Cryo Refrigerator, aluminum cold drawing is cooled down
To certain temperature, so as to cool down optical component indirectly.The vacuum and low temperature system reduces the heat radiation inside measuring system, lowers
Ambient noise, detectivity is improved, keeps the optical element of optical system to clean, keeps high reflectivity..
In the another embodiment of the application, atomic weak multiband infrared radiation degree measuring system also includes liquid nitrogen filling system
System and pumped vacuum systems, the liquid nitrogen filling system, for controlling the liquid nitrogen level in vacuum and low temperature cabin, by liquid nitrogen by vacuum
Low temperature chamber freezes, and does not produce vibration, easy to operate, temperature is up to below 100K in vacuum and low temperature cabin；The pumped vacuum systems is
Molecule pump assembly, for vacuum in vacuum and low temperature cabin to be brought up into 10-5Pa magnitudes, the volume of whole cryogenic vacuum chamber are less than Φ
500mm × 600mm, weight are about 80kg.
The atomic weak multiband infrared radiation degree measuring system that the present embodiment proposes, with reference to vacuum and low temperature cabin, off axis it is all-trans
Optical system is designed with single-point infrared detector, is tested light beam and is entered by infrared window in vacuum and low temperature cabin, by one
Group off-axis paraboloidal mirror shrink beam, field stop is set between off-axis paraboloidal mirror group to shield veiling glare, the infrared signal after shrink beam passes through
The wave band that narrow band pass filter wheel and chopper selection are wanted, focuses on infrared unit detector by off-axis paraboloidal mirror and is visited
Survey, signal is extracted by data acquisition and processing system, completes faint infrared radiation measurement.Compared with prior art, it is of the invention
It can be achieved to be less than 10-10W/cm2The faint infrared radiation degree measurement of magnitude, while add the target based on ccd detector and aim at system
System, simply, conveniently, a whole set of optical system is located in vacuum and low temperature chamber for measurement, greatly improves measurement sensitivity, and measurement accuracy is high.
A kind of exemplary embodiment again of the application, it is proposed that work of atomic weak multiband infrared radiation degree measuring system
Method, this method comprise the following steps：
(1) liquid nitrogen refrigerating is filled into vacuum and low temperature cabin by liquid nitrogen filling system, it is by pumped vacuum systems that vacuum is low
Vacuum brings up to 10 in warm cabin-5Pa magnitudes；
(2) light beam is tested through infrared window to enter in vacuum and low temperature cabin, through reached after diaphragm for eliminating stray light and aperture diaphragm from
Axle parabola primary mirror, off axis paraboloid mirror secondary mirror is reached through off axis paraboloid mirror primary mirror and field stop, off axis paraboloid mirror secondary mirror is light
Beam re-start collimation after by narrow band pass filter wheel and chopper after, reach parabola focus lamp, gather through parabola focus lamp
It is burnt on single-point infrared detector；
(3) after the signal detected is filtered and amplified by filter amplification circuit by single-point infrared detector, it is transferred to master
The signal of collection is transferred to computer by controller, master controller by interface circuit；
(4) the infrared radiation degree of tested light beam is obtained by computer, and shown.
Further, in the step (2), field stop is adjusted by the stepper motor of main controller controls first, and lead to
The second step motor control narrow band pass filter wheel rotation rotary test wavelength is crossed, master controller is controlled by digital PLL circuit
Direct current generator, make the stable measured signal of chopper output frequency.
In the present embodiment, the detailed process that the infrared radiation degree of tested light beam is calculated by computer is：
Atomic weak multiband infrared radiation degree measuring system is demarcated first, passes through the mark of irradiation level E known to measurement
Quasi-optical source, by the output signal S of computer acquisition single-point infrared detector, then it is red that the atomic weak multiband can be calculated
The irradiation response degree R of external irradiation degree measuring system is E/S；It is infrared by computer acquisition single-point when actual measurement is tested light beam
Detector output signal S ', then measured target irradiation level E '=R × S ' can be calculated.
As can be seen from the above description, the application the above embodiments realize following technique effect：
(1) the application uses vacuum and low temperature cabin, optical system and infrared detector, realizes the faint infrared spoke of tested light beam
Illumination photometry, vacuum insulation environment is provided for the cooling of optical component and temperature control by vacuum and low temperature cabin, it is sensitive to improve measurement
Degree；Tested light beam is passed through by infrared window, diaphragm for eliminating stray light and aperture diaphragm, off axis paraboloid mirror primary mirror by optical system, regarded
Focused on after field diaphragm, off axis paraboloid mirror secondary mirror, narrow band pass filter wheel, chopper and parabola focus lamp on infrared detector,
Tested light beam is measured using refrigeration mode single-point infrared detector, signal is extracted by data acquisition and processing system, it is complete
Into faint infrared radiation measurement；
(2) the application adds diaphragm for eliminating stray light in the light path of optical system, at the same using off axis paraboloid mirror primary mirror and from
Axle parabola secondary mirror optical beam transformation makes light beam diminish, and light beam is filtered using narrow band pass filter wheel and chopper；From
The focal point of axle parabola primary mirror and off axis paraboloid mirror secondary mirror uses field stop, carries out light beam selection；
(3) the application using can multi-dimensional adjustment platform infrared radiation degree measuring system and the docking location of tested light beam are entered
Row adjustment, infrared radiation degree measuring system can be also placed on stroller, facilitate different places to use；Eliminated using vacuum and low temperature system
The influence of infrared background noise, the heat radiation inside infrared radiation degree measuring system is reduced, improve detectivity；
(4) the application is using the tested light beam of measured target sighting system observation, it is ensured that is measured light beam and fully incides letter
On the infrared detector of number detecting module.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. a kind of atomic weak multiband infrared radiation degree measuring system, it is characterized in that, including optical system, signal detection module,
Data acquisition and processing system and multi-dimensional adjustment platform, the multi-dimensional adjustment platform are provided with vacuum and low temperature cabin, the optical system
System and signal detection module are separately positioned in the vacuum and low temperature cabin, the optical system, for tested light beam is carried out from
Axle total-light-reflection is converted, and the tested light beam after conversion is focused in signal detection module；The signal detection module, for examining
Survey tested light beam；The data acquisition and processing system, for controlling the optical system and signal detection module, and receive institute
State the signal that signal detection module detects and processing.
2. the atomic weak multiband infrared radiation degree measuring system of one kind according to claim 1, it is characterized in that, the signal
Detecting module uses refrigeration mode single-point infrared detector.
3. the atomic weak multiband infrared radiation degree measuring system of one kind according to claim 2, it is characterized in that, the optics
System includes infrared window, off axis paraboloid mirror primary mirror, off axis paraboloid mirror secondary mirror and parabola focus lamp, and the infrared window tilts
It is arranged on the shell wall in vacuum and low temperature cabin, the off axis paraboloid mirror primary mirror, off axis paraboloid mirror secondary mirror and parabola focus lamp are set
In vacuum and low temperature cabin；Diaphragm for eliminating stray light and aperture diaphragm are provided between infrared window and the off axis paraboloid mirror primary mirror, institute
The focal point for stating off axis paraboloid mirror primary mirror and off axis paraboloid mirror secondary mirror is provided with field stop, the off axis paraboloid mirror secondary mirror and throwing
Narrow band pass filter and chopper are provided between object plane focus lamp；Tested light beam is through in infrared window vacuum and low temperature cabin, via hole diameter
After diaphragm and diaphragm for eliminating stray light, off axis paraboloid mirror primary mirror, field stop, off axis paraboloid mirror secondary mirror, narrow band pass filter, chopper,
Focused on through parabola focus lamp on infrared detector.
4. the atomic weak multiband infrared radiation degree measuring system of one kind according to claim 3, it is characterized in that, it is described off-axis
Parabola primary mirror, off axis paraboloid mirror secondary mirror and parabola focus lamp are respectively adopted made of aluminium alloy, and are coated with metallic reflective coating
And medium protection film.
5. the atomic weak multiband infrared radiation degree measuring system of one kind according to claim 3, it is characterized in that, the optics
System includes infrared window, off axis paraboloid mirror primary mirror, off axis paraboloid mirror secondary mirror and parabola focus lamp, and the infrared window tilts
It is arranged on the shell wall in vacuum and low temperature cabin, the off axis paraboloid mirror primary mirror, off axis paraboloid mirror secondary mirror and parabola focus lamp are set
In vacuum and low temperature cabin；Diaphragm for eliminating stray light and aperture diaphragm are provided between infrared window and the off axis paraboloid mirror primary mirror, institute
The focal point for stating off axis paraboloid mirror primary mirror and off axis paraboloid mirror secondary mirror is provided with field stop, the off axis paraboloid mirror secondary mirror and throwing
Narrow band pass filter and chopper are provided between object plane focus lamp；Tested light beam enters in vacuum and low temperature cabin through infrared window, warp
Cross aperture diaphragm and incide off axis paraboloid mirror primary mirror after diaphragm for eliminating stray light, then it is anti-by off axis paraboloid mirror primary mirror and field stop
Off axis paraboloid mirror secondary mirror is mapped to, off axis paraboloid mirror secondary mirror is collimated again to light beam, and passes through narrow band pass filter and chopper
Parabola focus lamp is incided after optical filtering, is focused of the light beam into by parabola focus lamp on infrared detector.
6. the atomic weak multiband infrared radiation degree measuring system of one kind according to claim 1, it is characterized in that, in addition to quilt
Director Aiming Sight/System is surveyed, the measured target sighting system is arranged on the front side of infrared window, the measured target sighting system
Including plane mirror of turning back, zoom lens and ccd detector, after tested light beam is irradiated to infrared window, be refracted to turn back it is flat
On the speculum of face, after plane mirror of turning back reflexes to zoom lens, it is transmitted to through zoom lens on ccd detector.
7. the atomic weak multiband infrared radiation degree measuring system of one kind according to claim 1, it is characterized in that, in addition to it is true
Empty cryogenic system, the vacuum and low temperature system include vacuum cavity, are provided with aluminum cold drawing in the vacuum cavity, the aluminum is cold
Optical component is installed, the aluminum cold drawing is connected with Cryo Refrigerator, is that aluminum cold drawing carries by Cryo Refrigerator on plate
Semen donors.
8. the atomic weak multiband infrared radiation degree measuring system of one kind according to claim 1, it is characterized in that, in addition to liquid
Nitrogen filling system and pumped vacuum systems, the liquid nitrogen filling system, for controlling the liquid nitrogen level in vacuum and low temperature cabin；It is described to take out
Vacuum system is molecule pump assembly, for vacuum in vacuum and low temperature cabin to be brought up into 10-5Pa magnitudes.
A kind of 9. work side of atomic weak multiband infrared radiation degree measuring system as any one of claim 1-8
Method, it is characterized in that, comprise the following steps：
(1) liquid nitrogen refrigerating is filled into vacuum and low temperature cabin by liquid nitrogen filling system, by pumped vacuum systems by vacuum and low temperature cabin
Interior vacuum brings up to 10-5Pa magnitudes；
(2) it is tested light beam through infrared window to enter in vacuum and low temperature cabin, off-axis throw is reached after diaphragm for eliminating stray light and aperture diaphragm
Object plane primary mirror, off axis paraboloid mirror secondary mirror is reached through off axis paraboloid mirror primary mirror and field stop, off axis paraboloid mirror secondary mirror is light beam weight
It is new collimated after by narrow band pass filter wheel and chopper rate height after, reach parabola focus lamp, gather through parabola focus lamp
It is burnt on single-point infrared detector；
(3) after the signal detected is filtered and amplified by filter amplification circuit by single-point infrared detector, it is transferred to main control
The signal of collection is transferred to computer by device, master controller by interface circuit；
(4) computer is handled the signal of reception, and is shown.
10. a kind of method of work based on atomic weak multiband infrared radiation degree measuring system according to claim 9, its
It is characterized in, in the step (2), field stop is adjusted by the stepper motor of main controller controls first, and pass through the second stepping
Motor control narrow band pass filter wheel rotates rotary test wavelength, and master controller controls direct current generator by digital PLL circuit,
Make the stable measured signal of chopper output frequency.
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