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Proceedings Paper

Interference technique for laser wavefront measurement
Author(s): Zhigang Fan; Aihong Zhang; Zhiqiang Wang
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Paper Abstract

The radial sheering interference technique is used to measure the laser wave-front. In the system, the near field and far field wave-front of the laser beam of large caliber are measured respectively. Many evaluation parameters of the laser wave-front can be obtained, such as scattering angle, M2 of the laser beam, peak-to-peak-value (PPV), strehl value et. al. The interferogram is acquired by CCD camera, pretreated by high-capability computer and then used to reconstruct the wave surface. Mathematical principle to reconstruct the wave-front is expatiated in the paper. The interference system can be adjusted easily and operate real-time during the experiment.

Paper Details

Date Published: 12 September 2002
PDF: 4 pages
Proc. SPIE 4915, Lasers in Material Processing and Manufacturing, (12 September 2002); doi: 10.1117/12.482862
Show Author Affiliations
Zhigang Fan, Harbin Institute of Technology (China)
Aihong Zhang, Harbin Institute of Technology (China)
Zhiqiang Wang, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 4915:
Lasers in Material Processing and Manufacturing
ShuShen Deng; Tatsuo Okada; Klaus Behler; XingZong Wang, Editor(s)

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