Study of measuring the intensity distribution of LED with lock-in amplifier

Kai Zhang; Yujun Zhang; Gaofang Yin; Xue Xiao; Huanbo Wang; Liquan Guo; Wenqing Liu

doi:10.1117/12.863727

11 October 2010 Study of measuring the intensity distribution of LED with lock-in amplifier

Kai Zhang, Yujun Zhang, Gaofang Yin, Xue Xiao, Huanbo Wang, Liquan Guo, Wenqing Liu

Author Affiliations +

Proceedings Volume 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 765622 (2010) https://doi.org/10.1117/12.863727
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

By using Digital Lock-in Amplifier LI5640, the intensity distribution of LED is measured, meanwhile compared with two other common measuring methods with the internal modulation. The structure of the research system, the transmitter module, the optical receiving module, the research light path and Digital Lock-in Amplifier LI5640 are all introduced and the analysis based on research results is given. It's proved that the Lock-in Amplifier is superior for weak light signal detecting; also this research system can be the reference of correlative research designs.

Citation Download Citation

Kai Zhang, Yujun Zhang, Gaofang Yin, Xue Xiao, Huanbo Wang, Liquan Guo, and Wenqing Liu "Study of measuring the intensity distribution of LED with lock-in amplifier", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 765622 (11 October 2010); https://doi.org/10.1117/12.863727

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