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Calibration method for blackbody cavity absorption coefficient under variable temperature condition

A technology of absorption coefficient and black body cavity, which is applied in the field of calibration of black body cavity absorption coefficient under variable temperature conditions, can solve problems such as drift of black body cavity absorption coefficient and lack of real-time monitoring technology of black body cavity absorption rate, so as to reduce optical noise and improve testing Efficiency, the effect of improving signal strength

Pending Publication Date: 2022-04-05
西安应用光学研究所
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Problems solved by technology

[0009] The purpose of the present invention is to develop a measurement technology based on flip-chip photodetectors to solve the problem of blackbody cavity absorption coefficient drift caused by temperature fluctuation and the technical problem of lack of real-time monitoring technology for blackbody cavity absorptivity. The power escaped from the absorption cavity is monitored to achieve accurate calibration of the absorption coefficient of the blackbody cavity

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  • Calibration method for blackbody cavity absorption coefficient under variable temperature condition
  • Calibration method for blackbody cavity absorption coefficient under variable temperature condition
  • Calibration method for blackbody cavity absorption coefficient under variable temperature condition

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Embodiment Construction

[0045] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0046] Aiming at the problem of temperature-varying real-time calibration of blackbody cavity absorptivity, the present invention greatly simplifies the optical path structure of the traditional integrating sphere method by introducing an upside-down photodetector. At the same time, it can realize the real-time monitoring of the absorption coefficient of the black body absorption cavity under the variable temperature environment.

[0047] Such as figure 1 As shown, the calibration method of the variable temperature blackbody cavity absorption coefficient in this embodiment is realized based on the radiation source 1, the laser power stabilization system 2, the blackbody cavity absorption coefficient calibration system 3...

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Abstract

The invention belongs to the field of optical metrology testing, and discloses a blackbody cavity absorption coefficient calibration method under a variable temperature condition, which comprises the following steps of: generating uniform monochromatic radiation by using a high-stability radiation source in combination with a stable power instrument, receiving the monochromatic radiation by a blackbody cavity to be tested, and measuring the absorption coefficient of the blackbody cavity by adding an inverted photoelectric detector in front of a Brewster window. And the reflected light beam intensity is calibrated, so that the full-temperature-section calibration of the blackbody cavity absorption coefficient is realized. According to the method, aiming at the verification problem of blackbody cavity absorption coefficient drift caused by current temperature fluctuation, a variable-temperature cavity-detector integrated test means is innovatively introduced, the measurement of the full-band absorption coefficient of the cavity in a variable-temperature environment is realized, and the method has the characteristics of small size, high calibration accuracy and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of optical metrology and testing, and relates to a method for calibrating the absorption coefficient, in particular to a method for calibrating the absorption coefficient of a black body cavity under variable temperature conditions. Background technique [0002] Absolute low temperature radiometer is a high-precision optical power measuring instrument integrating light, mechanics, electricity and calculation, involving optical design simulation, optical process design, precision optical component manufacturing, precision machining, photoelectric system integration and precision assembly, Technical research in various fields such as precision temperature measurement and control, vacuum technology, refrigeration technology, superconducting technology, automatic control, etc., research and construction of an optical radiation measurement system based on a low temperature radiometer, not only enables the measurem...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/56G01J5/53
CPCY02E30/10
Inventor 俞兵储隽伟范纪红袁林光秦艳孙宇楠曹锋王曼
Owner 西安应用光学研究所
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