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Proceedings Paper

Auto-nulling system design of ultraviolet enhanced electrically calibrated pyroelectric radiometer
Author(s): Qi Hu; Lingjuan Gu; Wen Li; Songlin Zhuang
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Paper Abstract

Electrically calibrated pyroelectric radiometer (ECPR) is a kind of electrical substitution radiometer (ESR) with high precision in optical power measurement. Its electrically calibrated pyroelectric detector (ECP) has been a widely used instrument in measuring optical power at relatively low levels over a broad wavelength range. The Precise automatic electrical pulse is used to heat the detecting surface which has the gold-black absorber material, and the electrical signal is accurately equal to the generated electrical signal of the modulated optical signal illuminated on the same detecting surface. This paper presents the principle of the electrical-optical equivalence and the auto-nulling circuit. The auto-nulling circuit is a kind of servo-loop circuits which could adjust the magnitude of the current pulses to reach the null condition at the output of the synchronous rectifier circuit. At this point, the optical power is equal to the electrical power, so the absolute value of the optical illumination can be determined by measuring the electrical power.

Paper Details

Date Published: 23 February 2006
PDF: 6 pages
Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 61504W (23 February 2006); doi: 10.1117/12.676750
Show Author Affiliations
Qi Hu, Univ. of Shanghai for Science and Technology (China)
Lingjuan Gu, Univ. of Shanghai for Science and Technology (China)
Wen Li, Univ. of Shanghai for Science and Technology (China)
Songlin Zhuang, Univ. of Shanghai for Science and Technology (China)


Published in SPIE Proceedings Vol. 6150:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Xun Hou; Jiahu Yuan; James C. Wyant; Hexin Wang; Sen Han, Editor(s)

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