CN105509895A - Radiation calibration method of spectral temperature measurer with telescopic optical system - Google Patents
Radiation calibration method of spectral temperature measurer with telescopic optical system Download PDFInfo
- Publication number
- CN105509895A CN105509895A CN201510987675.4A CN201510987675A CN105509895A CN 105509895 A CN105509895 A CN 105509895A CN 201510987675 A CN201510987675 A CN 201510987675A CN 105509895 A CN105509895 A CN 105509895A
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- China
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- spectral
- temperature measurement
- measurement instrument
- standard sources
- optical system
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- 230000003595 spectral effect Effects 0.000 title claims abstract description 50
- 230000003287 optical effect Effects 0.000 title claims abstract description 43
- 230000005855 radiation Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005316 response function Methods 0.000 claims abstract description 13
- 238000012634 optical imaging Methods 0.000 claims abstract description 5
- 238000009529 body temperature measurement Methods 0.000 claims description 47
- 238000001228 spectrum Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 12
- 230000004313 glare Effects 0.000 claims description 10
- 238000013178 mathematical model Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 238000002310 reflectometry Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000002360 explosive Substances 0.000 description 8
- 238000004164 analytical calibration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
- G01J5/54—Optical arrangements
-
- 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
- G01J5/802—Calibration by correcting for emissivity
Abstract
The invention relates to a radiation calibration method of a spectral temperature measurer with a telescopic optical system. Problems which have existed in radiation calibration of the spectral temperature measurer with the telescopic optical system for a long time can be solved through the calibration of a spectral power response function. According to the method, an infinity standard target is simulated according to spectral radiation theories and optical imaging principles; standard radiation parameters of various modules are accurately tested; and the calibration of the radiation power of the spectral temperature measurer with the telescopic optical system is realized through establishing a calibration mathematics model. With the method adopted, difficulties in radiation absolute power calibration of the spectral temperature measurer with the telescopic optical system in the spectral detection field can be eliminated.
Description
Technical field
The invention belongs to optical precision field tests, be related specifically to one and there is telescope optical system radiation calibration method
Background technology
In radiation calibration field, solve the problem of spectroscopic temperature measurement instrument radiation calibration in laboratory with camera optical system at present, the spectroscopic temperature measurement instrument with telescope optical system is mainly completed to the calibration of relative radiated power, or calibrate at a distance in outfield.
For first method, only provide the size that radiation power is relative, accurately can not provide radiation power is how many on earth; Second method is calibrated at a distance in outfield, due to be subject to ambient lighting and weather condition to affect calibration accuracy not high.Therefore the calibration carrying out absolute radiation power for the spectroscopic temperature measurement instrument with telescope optical system is the difficult problem in industry always.
Summary of the invention
The present invention devises one and has telescope optical system radiation calibration method, by solving the radiation calibration problem for a long time with telescope optical system spectroscopic temperature measurement instrument to the demarcation of spectral power response function.
Technical scheme of the present invention is as follows: one has telescope optical system radiation calibration method, comprises the following steps:
1) design has the standard set-up of telescope optical system spectroscopic temperature measurement instrument
According to the test request with telescope optical system spectroscopic temperature measurement instrument, it is imaged on unlimited distance, and therefore, the standard set-up with telescope optical system spectroscopic temperature measurement instrument is generally made up of standard sources module and optical alignment system, as shown in Figure 1.
Wherein standard sources module comprises standard sources and electric power system, spectral radiance monitoring unit, iris etc., be provided in spectral distribution constant when export continuously adjustable radiation power.
Optical alignment system is primarily of compositions such as optical alignment mirror and accurate mounting and adjusting bases thereof.
Finally, the spectral power distribution of standard sources and the spectral reflectivity of optical alignment mirror are calibrated by metrological service.
2) mathematical model with telescope optical system radiation calibration is set up.
Detect theoretical known according to optical imaging concept and spectral radiance, the spectral power response function K (λ) assigning spectroscopic temperature measurement instrument in the irradiation of standard sources is provided by following formula:
K(λ)=Φ
s(λ)·
ρ(λ)/[
V(λ)-
V 0]
In formula, the spectral power that Φ s (λ) is standard sources, the spectral reflectance that ρ (λ) is optical alignment mirror.V (λ) is the output spectrum signal of spectroscopic temperature measurement instrument under standard sources is irradiated, and V0 is the veiling glare signal demarcating environment.According to formula (1), because the spectral power of standard sources and the spectral reflectance of optical alignment mirror are demarcated by metrological service, as long as accurately the test output spectrum signal of spectroscopic temperature measurement instrument and veiling glare signal of V0 environment under standard sources is irradiated can obtain the spectral power response function K (λ) of instrument, its unit is W/V.
3) demarcate
Open standard sources, by spectroscopic temperature measurement instrument according to such as 1 being placed in parallel light path, aiming at incident ray, and top to bottom, left and right, front and rear adjustment being carried out to spectroscopic temperature measurement instrument, make light source as high-visible and be full of the measurement visual field of spectral radiometer.The iris of adjustment criteria light source, makes the output signal of spectroscopic temperature measurement instrument in the best test specification of spectral radiometer.
Secondly, close iris, read the veiling glare signal V0 of environment by spectroscopic temperature measurement instrument, then open iris, read the output signal V (λ) of standard sources by spectroscopic temperature measurement instrument.
Finally, according to the spectral power response function K (λ) of the calculated with mathematical model spectroscopic temperature measurement instrument set up, and input spectrum temperature measurer calibration system.Namely radiation calibration is completed.
The invention has the beneficial effects as follows: the method is theoretical and optical imaging concept according to spectral radiance, simulation infinity standard target, by the accurate test to modules Standard Ratio parameter, the mathematical model setting up calibration realizes the demarcation with telescope optical system spectroscopic temperature measurement instrument radiation power, this method solve in spectrographic detection field for a difficult problem with the calibration of telescope optical system spectroscopic temperature measurement instrument radiation absolute power, and simple possible, measuring accuracy are high.
Accompanying drawing explanation
Fig. 1 is spectroscopic temperature measurement instrument calibration principle figure of the present invention.
Fig. 2 is standard sources module map of the present invention.
Embodiment
The preferred embodiment of the present invention is for the spectroscopic temperature measurement meter of the thermometric that explodes, its radiation temperature scope is generally 1000 DEG C ~ 4000 DEG C, because temperature is too high, standard blackbody cannot be adopted to demarcate, generally by realizing the demarcation of high-temperature part temperature in conjunction with Planck law to the accurate test of radiation power.
(1) caliberating device composition
Its calibration principle is shown in Fig. 1, primarily of standard sources module and optical alignment system composition, wherein standard sources module comprises standard sources and electric power system, spectral radiance monitoring unit, iris etc., be provided in spectral distribution constant when export continuously adjustable radiation power, optical alignment system is primarily of compositions such as optical alignment mirror and accurate mounting and adjusting bases thereof.
(2) calibration principle
According to optical imaging concept, the light beam sent when standard sources becomes directional light after optical alignment system, it is desirable infinity standard target, detected from spectral radiance theoretical, arrive the standard spectrum power Φ (λ) of spectroscopic temperature measurement instrument and the spectral power response function of spectroscopic temperature measurement instrument
k(λ) can be provided by following formula respectively:
Φ(λ)=Φ
s(λ)·
ρ(λ)（1）
K(λ)=Φ(λ)/[
V(λ)-
V 0]（2）
Φ in formula
s(λ) be the spectral power of standard sources,
ρ(λ) be the spectral reflectance of optical alignment mirror.
v(λ) be the output spectrum signal of spectroscopic temperature measurement instrument under standard sources is irradiated,
v 0for demarcating the veiling glare signal of environment.
According to formula (1), (2), have:
K(λ)=Φ
s(λ)·
ρ(λ)/[
V(λ)-
V 0]（3）
(3) demarcate
Open standard sources, by spectroscopic temperature measurement instrument according to such as 1 being placed in parallel light path, aiming at incident ray, and top to bottom, left and right, front and rear adjustment being carried out to spectroscopic temperature measurement instrument, make light source as high-visible and be full of the measurement visual field of spectral radiometer.The iris of adjustment criteria light source, makes the output signal of spectroscopic temperature measurement instrument in the best test specification of spectral radiometer.
Secondly, close iris, read the veiling glare signal of environment by spectroscopic temperature measurement instrument
v 0, then open iris, the output signal of standard sources is read by spectroscopic temperature measurement instrument
v(λ).
Finally, the spectral power response function of spectroscopic temperature measurement instrument is calculated according to formula (3)
k, and input spectrum temperature measurer calibration system (λ).Namely radiation calibration is completed.
(4) test of radiation power and the blast temperature of exploding
After the spectral power response function of spectroscopic temperature measurement instrument is demarcated, then the radiation power Φ that explosive source exported in certain spectrum (λ 1 ~ λ 2) scope of spectroscopic temperature measurement instrument
t(λ) be:
Φ
t(λ)=∫
λ2λ1 K(λ)·[
V t (λ)-
V 0t(λ)]·dλ（4）
In formula
v t (λ) for the output spectrum signal of tested explosive source tested by spectroscopic temperature measurement instrument,
v 0tfor the veiling glare signal of tested explosive source environment.
By formula (3) substitute into formula (4) can obtain spectroscopic temperature measurement instrument radiation power be:
Φ
t(
λ)=∫
λ2λ1Φ
s(
λ)·
ρ(
λ)·[
V t (
λ)-
V 0t(
λ)]/[
V(
λ)-
V 0]·
dλ(5)
From formula (3), as long as carry out absolute calibration to standard sources and optical alignment mirror, spectroscopic temperature measurement instrument spectral power response function can be obtained, according to formula (5) after spectroscopic temperature measurement instrument spectral power response function is demarcated, the radiation power of tested explosive source can be obtained by the veiling glare signal of the output spectrum signal and tested explosive source environment of testing tested explosive source.
After explosive source radiation power is determined, according to Planck law by can obtain the blast temperature of explosive source to the algorithm research of emissivity.
Claims (1)
1. there is a telescope optical system radiation calibration method, it is characterized in that: comprise the following steps:
1) design has the standard set-up of telescope optical system spectroscopic temperature measurement instrument
According to the test request with telescope optical system spectroscopic temperature measurement instrument, it is imaged on unlimited distance, and therefore, the standard set-up with telescope optical system spectroscopic temperature measurement instrument is generally made up of standard sources module and optical alignment system,
Wherein standard sources module comprises standard sources and electric power system, spectral radiance monitoring unit, iris etc., be provided in spectral distribution constant when export continuously adjustable radiation power, optical alignment system is primarily of compositions such as optical alignment mirror and accurate mounting and adjusting bases thereof, finally, the spectral power distribution of standard sources and the spectral reflectivity of optical alignment mirror are calibrated by metrological service;
2) mathematical model with telescope optical system radiation calibration is set up;
Detect theoretical known according to optical imaging concept and spectral radiance, the spectral power response function K (λ) assigning spectroscopic temperature measurement instrument in the irradiation of standard sources is provided by following formula:
K(λ)=Φ
s(λ)·
ρ(λ)/[
V(λ)-
V 0]
In formula, the spectral power that Φ s (λ) is standard sources, the spectral reflectance that ρ (λ) is optical alignment mirror, V (λ) is the output spectrum signal of spectroscopic temperature measurement instrument under standard sources is irradiated, V0 is the veiling glare signal demarcating environment, according to formula (1), because the spectral power of standard sources and the spectral reflectance of optical alignment mirror are demarcated by metrological service, as long as accurately the test output spectrum signal of spectroscopic temperature measurement instrument and veiling glare signal of V0 environment under standard sources is irradiated can obtain the spectral power response function K (λ) of instrument, its unit is W/V,
3) demarcate
Open standard sources, by spectroscopic temperature measurement instrument according to such as 1 being placed in parallel light path, aim at incident ray, and carry out up and down to spectroscopic temperature measurement instrument, left and right, front and back regulate, make light source as high-visible and be full of the measurement visual field of spectral radiometer, the iris of adjustment criteria light source, make the output signal of spectroscopic temperature measurement instrument in the best test specification of spectral radiometer, secondly, close iris, the veiling glare signal V0 of environment is read by spectroscopic temperature measurement instrument, open iris again, the output signal V (λ) of standard sources is read by spectroscopic temperature measurement instrument, finally, according to the spectral power response function K (λ) of the calculated with mathematical model spectroscopic temperature measurement instrument set up, and input spectrum temperature measurer calibration system, namely radiation calibration is completed.
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Cited By (3)
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| CN106643796A (en) * | 2016-12-02 | 2017-05-10 | 北京空间机电研究所 | Radiometric calibration method based on on-orbit benchmark satellite |
| CN108680967A (en) * | 2018-04-03 | 2018-10-19 | 芜湖泰贺知信息系统有限公司 | A kind of robot scaling equipment and its Calibration Method for passive terahertz imaging instrument |
| CN110702274A (en) * | 2019-11-06 | 2020-01-17 | 中国计量科学研究院 | Space calibration method based on accurate miniature phase-change fixed point blackbody model |
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| CN108680967A (en) * | 2018-04-03 | 2018-10-19 | 芜湖泰贺知信息系统有限公司 | A kind of robot scaling equipment and its Calibration Method for passive terahertz imaging instrument |
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| CN110702274A (en) * | 2019-11-06 | 2020-01-17 | 中国计量科学研究院 | Space calibration method based on accurate miniature phase-change fixed point blackbody model |
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