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Proceedings Paper

High precision measurement method of laser divergence angle based on CCD imaging
Author(s): Cheng-hao Jiang; Jing-guo Zhu; Feng Li; Meng-lin Li; Yang Hu
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Paper Abstract

The use of CCD imaging to measure laser divergence angle and imaging spot quality directly affect the accuracy of measurement results. Analysis of laser spot imaging features, do noise reduction and desaturation process for the image. With the method of image coordinate vectors superposition to obtain the laser intensity distribution curve in x, y direction, and laser spot diameter is exactly calculated by curve fitting algorithm. Experiment for different exposure intensity spot images, this method is effective to suppress the influence of CCD self-noise and improve measurement accuracy. Different exposure intensity spot images obtained a high measurement accuracy results, and laser divergence angle measurement results with an accuracy higher than 0.01mrad.

Paper Details

Date Published: 24 October 2017
PDF: 10 pages
Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 104621B (24 October 2017); doi: 10.1117/12.2283454
Show Author Affiliations
Cheng-hao Jiang, Academy of Opto-Electronics (China)
Jing-guo Zhu, Academy of Opto-Electronics (China)
Feng Li, Academy of Opto-Electronics (China)
Meng-lin Li, Academy of Opto-Electronics (China)
Yang Hu, Bejing Information Science and Technology Univ. (China)


Published in SPIE Proceedings Vol. 10462:
AOPC 2017: Optical Sensing and Imaging Technology and Applications
Yadong Jiang; Haimei Gong; Weibiao Chen; Jin Li, Editor(s)

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