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Proceedings Paper

Analytical beam-width characteristics of distorted cat-eye reflected beam
Author(s): Yanzhong Zhao; Congmiao Shan; Yonghui Zheng; Laixian Zhang; Huayan Sun
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Paper Abstract

The analytical expression of beam-width of distorted cat-eye reflected beam under far-field condition is deduced using the approximate three-dimensional analytical formula for oblique detection laser beam passing through cat-eye optical lens with center shelter, and using the definition of second order moment, Gamma function and integral functions. The laws the variation of divergence angle and astigmatism degree of the reflected light with incident angle, focal shift, aperture size, and center shelter ratio are established by numerical calculation, and physical analysis. The study revealed that the cat-eye reflected beam is like a beam transmitted and collimated by the target optical lens, and has the same characteristics as that of Gaussian beam. A proper choice of positive focal shift would result in a divergence angle smaller than that of no focal shift. The astigmatism is mainly caused by incidence angle.

Paper Details

Date Published: 6 March 2015
PDF: 9 pages
Proc. SPIE 9446, Ninth International Symposium on Precision Engineering Measurement and Instrumentation, 94462W (6 March 2015); doi: 10.1117/12.2181205
Show Author Affiliations
Yanzhong Zhao, Equipment Academy of PLA (China)
Congmiao Shan, Equipment Academy of PLA (China)
Yonghui Zheng, Equipment Academy of PLA (China)
Laixian Zhang, Equipment Academy of PLA (China)
Huayan Sun, Equipment Academy of PLA (China)

Published in SPIE Proceedings Vol. 9446:
Ninth International Symposium on Precision Engineering Measurement and Instrumentation
Junning Cui; Jiubin Tan; Xianfang Wen, Editor(s)

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