CN107941351B - The infrared scaling light source applied under the conditions of vacuum and low temperature - Google Patents
The infrared scaling light source applied under the conditions of vacuum and low temperature Download PDFInfo
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- CN107941351B CN107941351B CN201610890674.2A CN201610890674A CN107941351B CN 107941351 B CN107941351 B CN 107941351B CN 201610890674 A CN201610890674 A CN 201610890674A CN 107941351 B CN107941351 B CN 107941351B
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- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 3
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
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Classifications
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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
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
- G01J5/53—Reference sources, e.g. standard lamps; Black bodies
-
- 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
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0896—Optical arrangements using a light source, e.g. for illuminating a surface
-
- 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
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/80—Calibration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
A kind of infrared scaling light source applied under the conditions of vacuum and low temperature, the infrared scaling light source mainly includes shell and mechanical mounting interface, black body radiation face, support construction, Vacuum Package window, power supply line, black body radiation face is placed in shell, there are circular iris above black body radiation film for case top, black body radiation face is parallel with plane where diaphragm, shell is equipped with for across the hole of power supply line, housing outer surface emissivity with higher, inner surface has lower emissivity, the one side of black body radiation film face diaphragm is as black body radiation face, with high emissivity, for emitting infrared radiation；Black body radiation film another side has low-launch-rate, and support construction uses the ceramic material of high temperature resistant, lower thermal conductivity to be made, and power supply line is used to power for the black body radiation face, and then controls the temperature in the black body radiation face.
Description
Technical field
The present invention relates to infrared radiation measurement, calibration and calibration technology fields, more particularly to one kind is in vacuum and low temperature condition
The infrared scaling light source of lower application.
Background technique
Currently, with the development of technology, the application of infrared imaging device has extended near space and the outer space, these are
System includes Space surveillance system, near space early warning system, outer space infrared seeker percussion system, spaceborne infrared remote sensing system
Deng, with stepping up for these infrared payload technique and tactics performance requirements, high-precision fixed quantization detection have become infrared payload into
The inexorable trend of one step development.
Radiation parameter calibration is basis and the precondition that infrared payload realizes quantification detection, passes through radiation parameter school
Standard, can quantitative detection target radiation magnitude so that infrared payload can by radiate magnitude judge target type, greatly raising
The detectivity of infrared payload has particularly important meaning for early warning system, outer space infrared seeker system etc..Together
When, radiation parameter calibration make it possible multi-source, multi-temporal data fusion and integrated application, improve Reconnaissance system, remote sensing
The data application efficiency of the infrared payloads such as system.
Using one or more infrared detectors in infrared payload, these infrared detectors are due to material property, production system
The influence of the factors such as technique is made, responsiveness can generate certain difference, so that there are one for same probe unit its detection performance
Fixed is non-linear, there is largely heterogeneity between different probe units.In addition, with the variation of use environment, work
Make the increase of time, the detection performance of infrared detector can generate different degrees of drift.However, infrared detector detection performance
Drift at any time, the heterogeneity of responsiveness between different probe units, to realizing that quantification detecting function has very not
The influence of benefit, therefore, in order to realize that quantification detects, it is necessary to radiation calibration is carried out to infrared payload, between different detectors
Photo-Response Non-Uniformity, same detector performance is corrected with environment and the drift of time etc..
Radiation parameter calibration is broadly divided into calibration and In-flight calibration before transmitting, wherein In-flight calibration is primarily to reduce
Infrared detection system self performance, which changes bring, to be influenced, if the pollution of optical mirror plane can be such that optical efficiency reduces, detector
Aging will affect the response rate of detector.In order to ensure realizing high-precision fixed quantization detection, not only need on ground in face of infrared load
Lotus carries out radiation parameter calibration, and timing is needed to carry out in-orbit radiation parameter calibration to it, to obtain accurate calibration coefficient,
The accurate performance indexes grasped in infrared payload operational process, it is ensured that the detection data accuracy during whole service.
It carries out in in-orbit radiation parameter calibration and calibration process to these infrared imaging load, is visited to cover its temperature
Survey range, it is desirable that it is with wide calibration temperature range；In order to realize high-precision fixed quantization detection, need to its radiation parameter into
The calibration of row multiple spot, while requiring single-point calibration precision high；In order to avoid prover time is long, calibration accuracy is influenced, needs to carry out fast
Speed calibration.
In addition, since load constantly develops to miniaturization, lightweight direction, to the high-precision radiation parameter in little space
The demand of in-orbit calibration is also more more and more urgent, this just proposes very high requirement to in-orbit radiation parameter collimation technique, simultaneously
It is required that parameter calibration and calibrator unit have high temperature stability；It is required that radiation parameter calibrator unit can adapt to a variety of rings
Border, including airborne circumstance, spaceborne high vacuum environment etc., and require its small in size, it is light-weight, with high reliability and good
Good world consistency.
The in-orbit radiation parameter calibration of tradition, calibration point is few, and more generally or two o'clock is calibrated, and calibration temperature range is narrow,
It is unable to satisfy the calibration of in-orbit radiation parameter and calibration requirements of current infrared payload.
Summary of the invention
It is an object of the invention to overcome the shortage of prior art, provide it is a kind of applied under the conditions of vacuum and low temperature it is infrared
Scaling light source is able to solve the on schedule few problem of conventional rail radiation parameter calibration process lieutenant colonel.
Technical solution of the invention:
A kind of infrared scaling light source applied under the conditions of vacuum and low temperature, the infrared scaling light source include black body radiation face 1,
Support construction 2, Vacuum Package window, shell 3 and power supply line 4；
The black body radiation face is placed in the shell, and the shell is by the upper body and lower case that are fixed together
It constitutes, the black body radiation face is gripped by the support construction, and the support construction is fixed on the bottom of the shell, institute
Case top is stated above the black body radiation face there are circular iris, plane where the black body radiation face and the diaphragm is flat
Row, the Vacuum Package window use target wave band have high transmittance optical material close, the upper body and
Lower case is equipped with for across the hole of power supply line, all material for constituting the infrared scaling light source to pass through at vacuum
Reason；
The shell is made of metal or alloy material, and outer surface is coarse using sandblasting or blackening processing
Black outer surface, emissivity with higher, inner surface cover the gold, silver or aluminium coat of high reflectance, and inner surface utilizes polishing
Process is smooth surface, has lower emissivity, and the shell is allowed to leak rate and meets the requirements by vacuum processing,
And do not generate pollution；
The black body radiation face, is made of the metal alloy of high resistivity, high temperature resistant, resistance to oxidation, the black body radiation
The one side of diaphragm described in the face of face keeps its surface thick as black body radiation face, black body radiation face using sandblasting or ion etch process
It is rough, high emissivity is made it have using high temperature oxidation process, or using spraying high emissivity coating there is black body radiation face
High emissivity is used for emitting infrared radiation；Black body radiation face another side makes it have low-launch-rate using polishing process, will
Nichrome heating pattern can be prepared in high temperature resistant substrate, and mechanical strength and resistance are made it have, or independently form one
Film guarantees its heating rate；
Support construction uses the ceramic material of high temperature resistant, lower thermal conductivity to be made, and support construction bottom is equipped with ceramic insulation
Seat 5；
Power supply line is made of metal conductive wire and conductive terminal, is used to power for the black body radiation face, in turn
Control the temperature in the black body radiation face；
The infrared scaling light source is calibrated by following procedure in vacuum low-temperature environment: beginning through institute from 0
Stating power supply line is the infrared scaling light source power supply, using predetermined power value as stepping, applies electricity to the infrared scaling light source
Power records the corresponding black body radiation face temperature value of the electrical power, until the temperature in the black body radiation face reaches described infrared
Scaling light source application environment temperature upper limit, the relationship between record power supply and temperature.
It is further preferred that the heating film is in the rectangle of 20mm*16mm.
It is further preferred that being encapsulated using vacuum sealing window, the Vacuum Package window is used to be had in target wave band
The optical material of high transmittance is made, and the optical material is quartz, zinc sulphide, zinc selenide, germanium or silicon, the vacuum sealing
The minimum thickness of window is determined by following formula:
Wherein, Th is the thickness of the vacuum sealing window, and DIA is the vacuum sealing window diameter, and P is the vacuum
The pressure difference that sealed window is born, MR are the intensity token state of material.
A kind of infrared scaling light source applied under the conditions of vacuum and low temperature provided in an embodiment of the present invention, the infrared calibration light
Source mainly includes shell and mechanical mounting interface, black body radiation face, support construction, Vacuum Package window, power supply line and attachment.
Shell and the predominantly entire miniature black matrix component of mechanical mounting interface provide mechanical support, while having certain mechanical interface,
It can be installed on required mounting surface, guarantee that there is small radiation heat transfer power between shell and black matrix；Black body radiation face
For infra-red radiation exit facet, after certain electrical power heating is provided for it, black body radiation face temperature is increased, and produces in service band
Raw satisfactory infra-red radiation, the calibrated radiation source of the in-orbit radiation calibration as infrared imaging device, infrared payload etc.；Support
The major function of structure provides securely support for black body radiation face, fixes, and is installed on shell, while also acting as and being thermally isolated
Effect, guarantee that there is the smallest leakage heat between black matrix and mounting structure, raising input power utilization rate advantageously ensures that heating
Rate, while reducing the influence to load totality thermal control design；Vacuum Package window guarantees that infrared scaling light source can be low in vacuum
It while work under the conditions of temperature, can work in laboratory environments, guarantee black body radiation face ambient enviroment and vacuum and low temperature condition
It is consistent, to guarantee to approach under the conditions of the temperature characterisitic in black body radiation face and vacuum and low temperature under laboratory condition；Supply lines
Road and attachment connection on the support structure, draw from the side or rear of shell and mechanical mounting interface, connect power supply, realize black
The function of supplying power of body radiating surface.
Detailed description of the invention
Included attached drawing is used to provide to be further understood from the embodiment of the present invention, and which constitute one of specification
Point, for illustrating the embodiment of the present invention, and come together to illustrate the principle of the present invention with verbal description.It should be evident that below
Attached drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying creation
Property labour under the premise of, be also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of infrared scaling light source structural schematic diagram applied under the conditions of vacuum and low temperature in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of support construction in the embodiment of the present invention；
Fig. 3 is band heating film schematic shapes in the embodiment of the present invention；
Fig. 4 is sealed window structural schematic diagram in the embodiment of the present invention；
Fig. 5 is shell mechanism schematic diagram in the embodiment of the present invention；
Fig. 6 is that infrared scaling light source shown in Fig. 1 uses different power supply mode temperature to change over time figure.
Specific embodiment
Specific embodiments of the present invention are described in detail below in conjunction with attached drawing.In the following description, for solution
Purpose and not restrictive is released, elaborates detail, to help to be apparent from the present invention.However, to those skilled in the art
It is readily apparent that the present invention can also be practiced in the other embodiments departing from these details for member.
It should be noted that only showing in the accompanying drawings in order to avoid having obscured the present invention because of unnecessary details
Gone out with closely related device structure and/or processing step according to the solution of the present invention, and be omitted with relationship of the present invention not
Big other details.
The embodiment of the present invention provides a kind of infrared scaling light source applied under the conditions of vacuum and low temperature, the infrared scaling light source
It can work under the conditions of vacuum and low temperature, can also work under normal temperature and pressure conditions, can be used as standard black body radiation source, use
To carry out in-orbit multiple spot, high-precision, wide temperature range, quickly calibrated and calibration to all kinds of imagers and load, have extensive
Application prospect.
Referring to Fig. 1, which includes black body radiation face, support construction, Vacuum Package window, shell and power supply
Route；
Black body radiation face is placed in the shell, and shell is made of the upper body and lower case being fixed together, black
Body radiating surface is gripped by support construction, and support construction is fixed on the bottom of shell, and case top is above black body radiation face
There are circular iris, black body radiation face is parallel with plane where diaphragm, and Vacuum Package window is used in target wave band with higher
The optical material of transmissivity is closed, and upper body and lower case are equipped with for constituting infrared calibration across the hole of power supply line
The all material of light source is by being vacuum-treated；
Shell is made of metal or alloy material, and optional material titanium alloy, aluminium alloy etc. are fabricated to certain machine
The form of tool interface, outer surface are coarse black outer surface, transmitting with higher using process such as sandblasting, nigrescences
Rate, inner surface cover the coating such as gold, silver or the aluminium of high reflectance, and inner surface is smooth surface using process such as polishings,
With lower emissivity, shell is allowed to leak rate and meets the requirements, and do not generate pollution by being vacuum-treated；
Black body radiation face is made of the metal alloy of high resistivity, high temperature resistant, resistance to oxidation, the optional nickel chromium triangle of metal alloy
Alloy, Aludirome, constantan etc., the one side of black body radiation face face diaphragm is as black body radiation face, in order to guarantee emissivity,
Its surface need to be handled, black body radiation face makes its rough surface using techniques such as sandblasting or ion etchings, using high temperature oxygen
The techniques such as change make it have high emissivity, or so that black body radiation face is had high emissivity using spraying high emissivity coating, use
In emitting infrared radiation；Black body radiation face another side makes it have low-launch-rate using techniques such as polishings, in order to guarantee it
Heating rate, while there is certain mechanical strength and resistance, under conditions of meeting index, need to design reasonable thickness and
Figure, in order to guarantee mechanical strength, by nichrome heating pattern preparation in high temperature resistant substrate, make it have mechanical strength and
Resistance, or a film is independently formed, guarantee its heating rate, enhancing mechanical strength, the mesh for improving uniformity can be realized
's；
Support construction uses the ceramic material of high temperature resistant, lower thermal conductivity to be made referring to fig. 2, and optional material includes oxidation
Zircon ceramic, magnesia ceramics, aluminium oxide ceramics etc. guarantee there is good be thermally isolated；
Power supply line is made of metal conductive wire and conductive terminal, is used to power for black body radiation face, and then control
The temperature in black body radiation face, optional plain conductor include copper conductor, aluminum conductor, golden conducting wire, silver wire etc..
The infrared scaling light source is calibrated by following procedure in vacuum low-temperature environment: beginning through institute from 0
Stating power supply line is the infrared scaling light source power supply, using predetermined power value as stepping, applies electricity to the infrared scaling light source
Power records the corresponding black body radiation face temperature value of the electrical power, until the temperature in the black body radiation face reaches described infrared
Scaling light source application environment temperature upper limit, the relationship between record power supply and temperature.
Preferably, heating film is in the rectangle of 20mm*16mm.
Preferably, Vacuum Package window, which is used, in target wave band there is the optical material of high transmittance to be made, can selection
Material includes quartz, zinc sulphide, zinc selenide, germanium, silicon etc., need to be strong according to the machinery of material in order to guarantee to have certain mechanical strength
Characteristic is spent, reasonable thickness is designed.
The infrared scaling light source, by thermal balance, can stablize Mr. Yu in the case where outside provides certain electrical power
Fixed temperature point, as infrared imaging device and the calibration calibrated radiation source of load, passes through to generate quantitative infra-red radiation
Quantitatively calibrating is carried out under the conditions of vacuum and low temperature, obtains the relationship between output power and radiation temperature, it can be by providing not
Same electrical power, makes it be stable at different temperature spots, to realize that multiple spot is calibrated.
The in-orbit radiation parameter calibration of tradition, calibration point is few, and more generally or two o'clock is calibrated, and calibration temperature range is narrow,
The in-orbit radiation parameter calibration requirements of current infrared payload are unable to satisfy, wherein important reason is without corresponding infrared fixed
Mark light source.
A kind of infrared scaling light source applied under the conditions of vacuum and low temperature provided in an embodiment of the present invention, the infrared calibration light
Source mainly includes shell and mechanical mounting interface, black body radiation face, support construction, Vacuum Package window, power supply line and attachment.
Shell and the predominantly entire miniature black matrix component of mechanical mounting interface provide mechanical support, while having certain mechanical interface,
It can be installed on required mounting surface, guarantee that there is small radiation heat transfer power between shell and black matrix；Black body radiation face
For infra-red radiation exit facet, after certain electrical power heating is provided for it, black body radiation face temperature is increased, and produces in service band
Raw satisfactory infra-red radiation, the calibrated radiation source of the in-orbit radiation calibration as infrared imaging device, infrared payload etc.；Support
The major function of structure provides securely support for black body radiation face, fixes, and is installed on shell, while also acting as and being thermally isolated
Effect, guarantee that there is the smallest leakage heat between black matrix and mounting structure, raising input power utilization rate advantageously ensures that heating
Rate, while reducing the influence to load totality thermal control design；Vacuum Package window guarantees that infrared scaling light source can be low in vacuum
It while work under the conditions of temperature, can work in laboratory environments, guarantee black body radiation face ambient enviroment and vacuum and low temperature condition
It is consistent, to guarantee to approach under the conditions of the temperature characterisitic in black body radiation face and vacuum and low temperature under laboratory condition；Supply lines
Road and attachment connection on the support structure, draw from the side or rear of shell and mechanical mounting interface, connect power supply, realize black
The function of supplying power of body radiating surface.
The most preferred embodiment for the infrared scaling light source applied under the conditions of vacuum and low temperature to above-mentioned with reference to the accompanying drawing make into
The description of one step:
The infrared scaling light source overall construction drawing that the present embodiment is applied under the conditions of vacuum and low temperature is as shown in Fig. 1.
The technical indicator that can reach mainly has:
● temperature range: 250K~750K；
● Net long wave radiation bore: >=16mm；
● emissivity: >=0.88；
● heating rate: >=16 DEG C/s；
● temperature-controlled precision :≤0.5K；
● stablize the time :≤60s；
● Temperature Distribution surface uniformity: it is better than ± 3K (tentative)；
● the service life: being no less than 1600 hours under 250K vacuum (10-1pa), and under normal temperature and pressure conditions, temperature is not more than
The service life is no less than 50 hours when 580K；
● weight: less than 500g；
● anti-pollution requirement: total matter damage is no more than 20mg.
Infrared scaling light source component includes that black body radiation face, support construction, Vacuum Package window, shell and mechanical erection connect
Mouth, power supply line and attachment.
Wherein, black body radiation face is radiation emitting device, in specific work process, makes its temperature liter by power supply control
High or reduction, rest part is appurtenances.
Black body radiation face and support construction are as shown in Figure 2.
Wherein, black body radiation face is made of high temperature resistant high-resistivity alloy, currently, more commonly used alloy mainly has nickel
Evanohm, Manic, Aludirome etc. select nichrome as black body radiation plane materiel material by comparing.Nickel chromium triangle closes
Golden material properties such as the following table 1:
1 nichrome material properties table of table
| Serial number | Property | Unit | Numerical value |
| 1 | Maximum operation (service) temperature | ℃ | 1200 |
| 2 | Resistivity | μΩ·m | 1.09 |
| 3 | Temperature coefficient of resistivity | 10-6/℃ | 1.3 |
| 4 | Linear expansion coefficient | 10-6/℃ | 18.0 |
Consider the clamping in black body radiation face, size Preliminary design are as follows: 20mm*16mm.
Consider power-supplying forms, black body radiation face there should be suitable resistance, high current is avoided to power, and primarily determine that resistance is
3-5 Ω, black body radiation surface resistance such as following formula:
Wherein, R is resistance, and ρ is resistivity, and L is radiating surface length, and S is radiating surface sectional area.According to calculating, black matrix spoke
Penetrating face thickness is 1.36 μm.In view of the mechanical strength of film, the form of band need to be used, and film thickness is thinned, is mentioned simultaneously
For mechanical support, guarantee mechanical strength, band heats membrane structure diagram as shown in figure 3, spaced about 10 μm of item, can also adopt
Meet organizational requirements strip pattern with other.
To guarantee emissivity, coating with thermostability and high emissivity need to be plated on black body radiation face.
Due to radiating surface very thin thickness, mechanical strength is poor, therefore, in specific assembling process, needs to formulate reasonable
Assembly technology；In order to guarantee mechanical strength, nichrome heating pattern can also be prepared in high temperature resistant substrate, be can be realized
The purpose (sacrificing heating rate in this way, thermal mass is larger, and heating rate is slower) for enhancing mechanical strength, improving uniformity.
Note: for guarantee system reliability, need to consider backup design, tentative programme be under the premise of meeting volume requirement,
Increase same size radiating surface one, to make backup radiating surface.
Sealed window is the guard block in black body radiation face, not only needs higher intensity and rigidity, it is also necessary at 1 μm
There is preferable transmitance in~5 μm of broadband, there is well adapting to property simultaneously for adverse circumstances.
In broadband have it is less compared with the material of high transmittance, the field application material be generally multispectral ZnS
And ZnSe, table 2 are the performance comparison abridged table of two kinds of materials.
2 ZnS and ZnSe performance comparison abridged table of table
It is comprehensively compared, considers optical property emphatically, select ZnSe as window material.
According to blackbody radiation source specific structure, sealed window design diameter is 16mm, due to having one inside and outside sealed window
Therefore the pressure difference of a atmospheric pressure when designing sealed window, needs to rationally design the thickness of sealed window, enough to guarantee
Intensity.
According to sealed window design theory, the minimum thickness of sealed window is determined by following formula 2:
Wherein, Th is the thickness of window, and DIA is window diameter, and the pressure difference that P is born by window, unit is psi (one
A atmospheric pressure is equal to 14.5psi), MR is the intensity token state of material, and unit psi can be obtained by tabling look-up.
According to formula, calculate ZnSe window with a thickness of 0.72mm, when practical application, need to there are certain surplus, it is preliminary really
Determining thickness window is 1mm, and sealed window structure chart is as shown in Figure 4.
Shell and mechanical mounting interface major function are mechanical connection effect, use aluminium alloy to make, by black matrix development
Technical requirements, outer dimension are Φ 60mm*20mm, and mounting hole is the four M3 mounting holes uniformly distributed in periphery.External coordination structure chart is such as
Shown in Fig. 5.
In order to guarantee that shell and mechanical mounting interface have specific optical property, it need to be carried out at surface appropriate
Reason, for example, inner wall can do polishing treatment to reduce radiation heat transfer, and for outer wall in order to reduce heat transfer, installation contact zone can be with
Blasting treatment is carried out, certain roughness is made it have.
It is subsequent, corresponding verification test need to be carried out, component design is adjusted according to test result.
For the source of infrared radiation applied in vacuum environment (or Vacuum Package), generally supplied using constant pressure source or constant-current source
Electricity, since the resistivity of material varies with temperature, resistivity is varied with temperature as shown in Equation 3.
ρ=ρ0(1+α(T-T0)) (3)
In formula, ρ, ρ0Respectively temperature T, T0When resistivity, α is temperature coefficient of resistivity, for nichrome, α > 0.
Therefore, with the difference of temperature, resistance will generate certain variation, so as to cause the variation of power-up power.For
Constant-current source, power-up power are increased with temperature and are increased, and for constant pressure source, are powered on power and are increased and reduce with temperature.
Through testing, under the conditions of constant pressure source, constant current source power supply, it is as shown in Figure 6 that temperature changes over time curve.
As can be seen that being powered using constant pressure source, it is more advantageous to and is rapidly heated.
In automatically controlled communication process, since constant pressure source technical indicator is more difficult to control, fix tentatively and controlled using constant-current source.
After the completion of infrared scaling light source preparation, is calibrated in vacuum low-temperature environment, calibrate temperature and output power
Between quantitative relationship, can be used as quantitative radiation calibration light source.
Power supply line and attachment use 0.5mm2Copper conductor as conductor cable, support portion is connected to by O-shaped terminal
On part, electrical power is provided for infrared scaling light source.
As above it describes for a kind of embodiment and/or the feature that shows can be in a manner of same or similar at one or more
It is used in a number of other embodiments, and/or combines or substitute the feature in other embodiments with the feature in other embodiments
It uses.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step, component or combinations thereof.
The many features and advantage of these embodiments are clear according to the detailed description, therefore appended claims are intended to
Cover all these feature and advantage of these embodiments fallen into its true spirit and range.Further, since this field
Technical staff is readily apparent that many modifications and changes, therefore is not meant to for the embodiment of the present invention to be limited to illustrated and description essence
Really structurally and operationally, but all suitable modifications and the equivalent fallen within the scope of its can be covered.
Unspecified part of the present invention is known to the skilled person technology.
Claims (3)
1. a kind of infrared scaling light source applied under the conditions of vacuum and low temperature, which is characterized in that the infrared scaling light source includes black
Body radiating surface, support construction, Vacuum Package window, shell and power supply line；
The black body radiation face is placed in the shell, and the shell is by the upper body and lower case structure that are fixed together
At the black body radiation face is gripped by the support construction, and the support construction is fixed on the bottom of the shell, described
For case top there are circular iris above the black body radiation face, plane where the black body radiation face and the diaphragm is flat
Row, the Vacuum Package window use target wave band have high transmittance optical material close, the upper body and
Lower case is equipped with for across the hole of power supply line, all material for constituting the infrared scaling light source to pass through at vacuum
Reason；
The shell is made of metal or alloy material, and outer surface is coarse black using sandblasting or blackening processing
Outer surface, emissivity with higher, inner surface cover the gold, silver or aluminium coat of high reflectance, and inner surface utilizes polishing process
Processing is smooth surface, has lower emissivity, and the shell is allowed to leak rate and meets the requirements, and not by being vacuum-treated
Generate pollution；
The black body radiation face, is made of the metal alloy of high resistivity, high temperature resistant, resistance to oxidation, and the black body radiation face is just
To the one side of the diaphragm as black body radiation face, black body radiation face makes its rough surface using sandblasting or ion etch process,
High emissivity is made it have using high temperature oxidation process, or makes black body radiation face with high-incidence using spraying high emissivity coating
Rate is penetrated, emitting infrared radiation is used for；Black body radiation face another side makes it have low-launch-rate using polishing process, by nickel chromium triangle
Alloy heating pattern is prepared in high temperature resistant substrate, makes it have mechanical strength and resistance, or independently form a film, is protected
Demonstrate,prove its heating rate；
The support construction uses the ceramic material of high temperature resistant, lower thermal conductivity to be made；
The power supply line, is made of metal conductive wire and conductive terminal, is used to power for the black body radiation face, in turn
Control the temperature in the black body radiation face；
The infrared scaling light source is calibrated by following procedure in vacuum low-temperature environment: beginning through the confession from 0
Electric line is the infrared scaling light source power supply, using predetermined power value as stepping, applies electrical power to the infrared scaling light source,
The corresponding black body radiation face temperature value of the electrical power is recorded, until the temperature in the black body radiation face reaches the infrared calibration light
Source application environment temperature upper limit, the relationship between record power supply and temperature.
2. infrared scaling light source according to claim 1, which is characterized in that the film is in the rectangle of 20mm*16mm.
3. infrared scaling light source according to claim 2, which is characterized in that it is encapsulated using vacuum sealing window, it is described true
Empty package window, which is used, in target wave band there is the optical material of high transmittance to be made, and the optical material is quartz, vulcanization
The minimum thickness of zinc, zinc selenide, germanium or silicon, the vacuum sealing window is determined by following formula:
Wherein, Th is the thickness of the vacuum sealing window, and DIA is the vacuum sealing window diameter, and P is the vacuum sealing
The pressure difference that window is born, MR are the intensity token state of material.
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| US6144031A (en) * | 1997-04-21 | 2000-11-07 | Inframetrics Inc. | Infrared video camera system with uncooled focal plane array and radiation shield |
| CN102809435A (en) * | 2012-08-23 | 2012-12-05 | 哈尔滨工业大学 | Surface source black body radiation source based on pulse tube refrigerator |
| CN103743489A (en) * | 2014-01-01 | 2014-04-23 | 西安应用光学研究所 | Infrared radiometer calibration method on basis of standard plane source black body |
| CN204788735U (en) * | 2015-07-10 | 2015-11-18 | 成都森川铁路车辆技术开发有限公司 | Black matrix heat source suitable for temperature calibration |
| CN105890766A (en) * | 2015-01-09 | 2016-08-24 | 北京振兴计量测试研究所 | Blackbody radiation source suitable for vacuum low-temperature environment |
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| KR101389003B1 (en) * | 2013-02-05 | 2014-04-24 | 에이피시스템 주식회사 | Apparatus for calibrating thermometer |
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| US6144031A (en) * | 1997-04-21 | 2000-11-07 | Inframetrics Inc. | Infrared video camera system with uncooled focal plane array and radiation shield |
| CN102809435A (en) * | 2012-08-23 | 2012-12-05 | 哈尔滨工业大学 | Surface source black body radiation source based on pulse tube refrigerator |
| CN103743489A (en) * | 2014-01-01 | 2014-04-23 | 西安应用光学研究所 | Infrared radiometer calibration method on basis of standard plane source black body |
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