Infrared and Laser Engineering, Volume. 47, Issue 1, 104003(2018)
Measurement method of self-thermal radiation for coaxial total reflection infrared optical system
Infrared optical system self-thermal radiation was evaluated, calculated and measured. Firstly, it introduced and compared the two kinds of the thermal radiation way of evaluation, effective emissivity and equivalent blackbody radiation temperature; Secondly, the way based on experiment of calculation for equivalent blackbody radiation temperature of self-thermal radiation was introduced in detail; Finally, the coaxial reflection infrared optical system thermal radiation was measured by using self-thermal radiation test platform and error analysis was carried out. The result show that self-thermal radiant exitance is proportional to the square of effectively F number of optical system and the linear coefficient for the output gray of self-thermal radiation between the integral time, is inversely proportional to transmittance. It shows that the equivalent blackbody radiation temperature for self-thermal radiation of coaxial reflection infrared optical system is 217.3 K. Error for radiation form background simulation board is 8.5%, the relative uncertainty of linear coefficient for the output gray of self-thermal radiation between integral time is 0.2%. It shows that infrared detector has a good stability under 5×10-4 Pa.
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Yu Fei, Ren Qifeng, Li Hua, Sun Wei, Huang Zhiqiang. Measurement method of self-thermal radiation for coaxial total reflection infrared optical system[J]. Infrared and Laser Engineering, 2018, 47(1): 104003
Category: 红外技术及应用
Received: Jun. 1, 2017
Accepted: Aug. 15, 2017
Published Online: Jan. 30, 2018
The Author Email: Fei Yu (falcon_yufei@126.com)