CN116256060A - Infrared weak light radiation calibration device and calibration method for photoelectric reconnaissance equipment - Google Patents
Infrared weak light radiation calibration device and calibration method for photoelectric reconnaissance equipment Download PDFInfo
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- CN116256060A CN116256060A CN202211705432.3A CN202211705432A CN116256060A CN 116256060 A CN116256060 A CN 116256060A CN 202211705432 A CN202211705432 A CN 202211705432A CN 116256060 A CN116256060 A CN 116256060A
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- 230000005855 radiation Effects 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000000903 blocking effect Effects 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 17
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- 238000001228 spectrum Methods 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 5
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- 238000003384 imaging method Methods 0.000 abstract description 2
- 230000005622 photoelectricity Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 5
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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
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/08—Arrangements of light sources specially adapted for photometry standard sources, also using luminescent or radioactive material
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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
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Abstract
The invention discloses an infrared weak light radiation calibration device and a calibration method of photoelectric reconnaissance equipment, and belongs to the technical field of photoelectricity. The impurity blocking band detector has the advantages of high sensitivity, large scale array, wide detection spectrum and high response speed; the measurement and calibration of the picowatt-level optical radiation power can be realized, and the unique performance of the picowatt-level optical radiation power can be widely applied to the fields of space imaging and the like; the blocking impurity band detector is used as a magnitude transmission detector, so that the measurement accuracy can be improved, the influence caused by the power jitter of the standard light source is reduced, and the measurement accuracy is improved.
Description
Technical Field
The invention belongs to the technical field of photoelectricity, and particularly relates to an infrared weak light radiation calibration device and a calibration method of photoelectric reconnaissance equipment.
Background
The high-sensitivity photoelectric detection equipment measures weak light radiation by using an infrared detector, an infrared weak light radiation testing system is used for providing infrared collimated light beams, the infrared irradiance of the testing system becomes the most core parameter of the technical indexes such as detection sensitivity and the like of the existing detection infrared detection equipment, and the accuracy and reliability of the magnitude of the infrared irradiance are directly related to the performance indexes of the high-sensitivity photoelectric detection equipment.
Currently, the infrared weak light radiation measurement is best in performance of a KVACC low-temperature background infrared light radiation test system developed by the air force laboratory in the United states; the method comprises the steps of tracing weak infrared light radiation to a low-temperature radiometer by using a national standard laboratory (NIST) to carry out magnitude tracing, and analyzing radiation characteristics under different wavelengths by using a Fourier transform spectrum analyzer to realize a spectrum range of 3-20 mu m; irradiance measurement range 10 -9 W/cm 2 /μm～10 -15 W/cm 2 And/μm, the measurement uncertainty reaches 3% -5%.
The research in the field of low-temperature weak infrared radiation test systems in China starts later, but with the requirements of national defense construction, remarkable research results are obtained, but the research results are limited by the technical process level and the fund situation and have a small gap from abroad all the time. ZM3000 optical remote sensor space environment simulation test equipment based on a blackbody as a standard radiation source is developed by a vinca ray machine of the Chinese academy of sciences, and the magnitude of an infrared weak radiation signal can only be analyzed through theoretical calculation due to the lack of the calibration capability of infrared weak radiation in China, so that accurate and reliable calibration data cannot be given.
The high-sensitivity photoelectric reconnaissance equipment is loaded on equipment such as a remote sensing satellite, a reconnaissance unmanned aerial vehicle, a remote rocket projectile and the like as a payload and is used for tasks such as long-time patrol flight above a target, reconnaissance monitoring, damage evaluation, communication relay and the like. At present, high-sensitivity photoelectric reconnaissance equipment mainly adopts a blackbody as a standard radiation source for calibration, and has the following problems: (1) The black body emissivity has large calibration difficulty and poor surface uniformity measurement precision, and can not meet the high-accuracy calibration and quantification application requirements of photoelectric reconnaissance equipment; (2) The photoelectric reconnaissance equipment is mainly used for collecting weak light radiation, and when the weak light radiation is calibrated by using a blackbody, the influence of the space environment heat radiation on a measurement result is large.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the infrared weak light radiation calibration device and the calibration method for the photoelectric reconnaissance equipment, which are reasonable in design, overcome the defects in the prior art and have good effects.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an infrared weak light radiation calibration device of photoelectric reconnaissance equipment comprises an infrared light source system, an infrared light beam transmission channel, a photoelectric reconnaissance equipment to be tested, a vacuum interface, a vacuum cover, a first off-axis parabolic reflector, a field diaphragm, a second off-axis parabolic reflector, an optical filter, a third off-axis parabolic reflector, an impurity blocking band detector, a pulse tube refrigerator and a vacuum pump unit;
the infrared light source system is a low-temperature blackbody light source and is configured to provide weak infrared radiation for calibration;
the infrared beam transmission channel is a vacuum double-layer corrugated pipe and is configured to isolate interference of external stray light;
the vacuum cover is configured to provide a low-temperature vacuum environment for blocking the impurity zone detector and the optical transmission channel, isolate stray light and improve the measurement signal-to-noise ratio;
the first off-axis parabolic reflector, the second off-axis parabolic reflector and the third off-axis parabolic reflector are configured to reflect and converge weak infrared radiation, and ensure that the light radiation is transmitted to the impurity blocking band detector;
a field stop configured to shield stray light;
a filter configured to filter different wavelengths of optical radiation;
a blocking impurity band detector configured for weak infrared radiation measurement, outputting a current signal;
a pulse tube refrigerator configured to provide a cold source for the impurity blocking band detector and the optical transmission system;
the vacuum pump unit is configured to be used for vacuumizing a measuring system, reducing interference of water molecules on infrared radiation and guaranteeing a weak light radiation measuring vacuum environment.
In addition, the invention also provides an infrared weak light radiation calibration method of the photoelectric reconnaissance equipment, which adopts the infrared weak light radiation calibration device of the photoelectric reconnaissance equipment, and specifically comprises the following steps:
step 1: powering on, reducing the temperature of the infrared weak light radiation calibration device to a working temperature range of 3K-10K for blocking the impurity zone detector, and then preheating;
step 2: the position of the infrared light source system is adjusted, so that the center of an output light spot can accurately irradiate the center position of the impurity blocking band detector after the light radiation passes through the infrared light source system;
step 3: adjusting the rotary filter to select a specific wavelength lambda 0 The light radiation of (2) enters an infrared weak light radiation calibration device, and the light radiation power P is measured 1 (λ 0 )；
Step 4: the detected photoelectric detection equipment is moved into the light path, the position and the inclination angle of the detected photoelectric detection equipment are adjusted, the light path vertically enters the center of the photosensitive surface, and the measured light power value P of the detected photoelectric detection equipment is recorded 2 (λ 0 )；
Step 5: repeating steps 3 and 4 two or more times, and calculating average value
And->
Calculating the photoelectric detection device to be detected according to the formula (1)The prepared correction coefficient:
wherein:
R(λ 0 ) -the calibrated photoelectric detection device is at λ 0 The correction coefficient of the wavelength point is 1;
The invention has the beneficial technical effects that:
1) The blocking impurity band detector, i.e., BIB detector, has a high sensitivity (NEP up to 10 -16 W/Hz -1/2 ) Large-scale array (1024×1024), wide detection spectrum (wavelength coverage of 2-40 μm) and fast response (time constant of 10) -10 s) advantages of; the measurement and calibration of the picowatt-level optical radiation power can be realized, and the unique performance of the picowatt-level optical radiation power can be widely applied to the fields of space imaging and the like;
2) The blocking impurity band detector is used as a magnitude transmission detector, so that the measurement accuracy can be improved, the influence caused by the power jitter of the standard light source is reduced, and the measurement accuracy is improved.
Drawings
FIG. 1 is a schematic diagram of the infrared weak light radiation calibration device of the photoelectric reconnaissance equipment;
wherein, 1-an infrared light source system; 2-an infrared beam transmission channel; 3-a detected photoelectric reconnaissance device; 4-vacuum interface; 5-vacuum low temperature cover; 6-a first off-axis parabolic mirror; 7-aperture stops; 8-a second off-axis parabolic mirror; 9-an optical filter; 10-a third off-axis parabolic mirror; 11-a blocking impurity zone detector B detector; 12-pulse tube refrigerator; 13-vacuum pump assembly.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
as shown in fig. 1, the infrared weak light radiation calibration device of the photoelectric reconnaissance equipment comprises an infrared light source system 1, an infrared light beam transmission channel 2, a photoelectric reconnaissance equipment 3 to be tested, a vacuum interface 4, a vacuum cover 5, a first off-axis parabolic reflector 6, a field diaphragm 7, a second off-axis parabolic reflector 8, an optical filter 9, a third off-axis parabolic reflector 10, an impurity blocking band detector 11, a pulse tube refrigerator 12, a vacuum pump unit 13 and the like.
The infrared light source system 1 is a low-temperature blackbody light source and is used for providing weak infrared radiation for calibration; the infrared beam transmission channel 2 is a vacuum double-layer corrugated pipe and is used for isolating interference of external stray light; the vacuum cover 5 is used for providing a low-temperature vacuum environment for blocking the impurity zone detector and the optical transmission channel, isolating stray light and improving the measurement signal-to-noise ratio; the first off-axis parabolic reflector 6, the second off-axis parabolic reflector 8 and the third off-axis parabolic reflector 10 are used for reflecting and converging weak infrared light radiation, so that the light radiation is ensured to be transmitted to the impurity zone blocking detector 11; a field stop 7 for shielding stray light; the optical filter is used for filtering the light radiation with different wavelengths; the impurity blocking band detector 11 is used for weak infrared radiation measurement, outputs a current signal, and has high sensitivity (NEP reaches 10 -16 W/Hz -1/2 ) Large-scale array (1024×1024), wide detection spectrum (wavelength coverage of 2 μm-40 μm) and fast response (time constant of 10) -10 s) advantages of; pulse tube refrigerator 12 is used to provide a cold source for the BIB detector and the optical transmission system; the vacuum pump unit 13 is used for vacuumizing the measuring system, reducing interference of water molecules on infrared radiation and guaranteeing a weak light radiation measuring vacuum environment.
The infrared weak light radiation calibration device of the photoelectric reconnaissance equipment adopts a Blocking Impurity Band (BIB) detector as a magnitude transmission detector to realize magnitude transmission of picowatt magnitude weak light radiation power; wherein the pulse tube refrigerator provides a cryogenic cold source and selects the wavelength of the optical radiation by using the optical filterAlternatively, the incident beam is converged to the surface of the BIB detector by using two off-axis parabolic reflectors, the optical radiation power is detected, and the calibration of the photoelectric detection equipment is realized by switching the same beam into the photoelectric detection equipment. The calibration device can integrally trace the source to the low-temperature radiometer, so that the light radiation value tracing is realized. An optical radiation calibration device based on a Blocking Impurity Band (BIB) detector is developed, and high-precision calibration of high-sensitivity photoelectric reconnaissance equipment is realized by utilizing the high-sensitivity detection capability of the BIB detector on weak infrared radiation. The Blocking Impurity Band (BIB) detector has high sensitivity (NEP up to 10) -16 W/Hz -1/2 ) Large-scale array (1024×1024), wide detection spectrum (wavelength coverage of 2-40 μm) and fast response (time constant of 10) -10 s) are provided.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (2)
1. An infrared weak light radiation calibration device of photoelectric reconnaissance equipment, which is characterized in that: the device comprises an infrared light source system, an infrared light beam transmission channel, a tested photoelectric reconnaissance device, a vacuum interface, a vacuum cover, a first off-axis parabolic reflector, a view field diaphragm, a second off-axis parabolic reflector, an optical filter, a third off-axis parabolic reflector, an impurity blocking band detector, a pulse tube refrigerator and a vacuum pump unit;
the infrared light source system is a low-temperature blackbody light source and is configured to provide weak infrared radiation for calibration;
the infrared beam transmission channel is a vacuum double-layer corrugated pipe and is configured to isolate interference of external stray light;
the vacuum cover is configured to provide a low-temperature vacuum environment for blocking the impurity zone detector and the optical transmission channel, isolate stray light and improve the measurement signal-to-noise ratio;
the first off-axis parabolic reflector, the second off-axis parabolic reflector and the third off-axis parabolic reflector are configured to reflect and converge weak infrared radiation, and ensure that the light radiation is transmitted to the impurity blocking band detector;
a field stop configured to shield stray light;
a filter configured to filter different wavelengths of optical radiation;
a blocking impurity band detector configured for weak infrared radiation measurement, outputting a current signal;
a pulse tube refrigerator configured to provide a cold source for the impurity blocking band detector and the optical transmission system;
the vacuum pump unit is configured to be used for vacuumizing a measuring system, reducing interference of water molecules on infrared radiation and guaranteeing a weak light radiation measuring vacuum environment.
2. A photoelectric reconnaissance equipment infrared weak light radiation calibration method is characterized in that: the infrared weak light radiation scaling device adopting the photoelectric reconnaissance equipment according to claim 1 comprises the following steps:
step 1: powering on, reducing the temperature of the infrared weak light radiation calibration device to a working temperature range of 3K-10K for blocking the impurity zone detector, and then preheating;
step 2: the position of the infrared light source system is adjusted, so that the center of an output light spot can accurately irradiate the center position of the impurity blocking band detector after the light radiation passes through the infrared light source system;
step 3: adjusting the rotary filter to select a specific wavelength lambda 0 The light radiation of (2) enters an infrared weak light radiation calibration device, and the light radiation power P is measured 1 (λ 0 )；
Step 4: the detected photoelectric detection equipment is moved into the light path, the position and the inclination angle of the detected photoelectric detection equipment are adjusted, the light path vertically enters the center of the photosensitive surface, and the measured light power value P of the detected photoelectric detection equipment is recorded 2 (λ 0 )；
Step 5: repeating steps 3 and 4 two or more times, and calculating average value
And->
Calculating a correction coefficient of the detected photoelectric detection equipment according to the formula (1):
wherein:
R(λ 0 ) -the calibrated photoelectric detection device is at λ 0 The correction coefficient of the wavelength point is 1;
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211705432.3A CN116256060A (en) | 2022-12-29 | 2022-12-29 | Infrared weak light radiation calibration device and calibration method for photoelectric reconnaissance equipment |
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| CN202211705432.3A CN116256060A (en) | 2022-12-29 | 2022-12-29 | Infrared weak light radiation calibration device and calibration method for photoelectric reconnaissance equipment |
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