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Proceedings Paper

Studies on system and measuring method of far-field beam divergency in near field by Ronchi ruling
Author(s): Chenbo Zhou; Li Yang; Wenli Ma; Peiying Yan; Tianquan Fan; Shangfeng He
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Paper Abstract

Up to now, as large as seven times of Rayleigh-range or more is needed in measuring the far-field Gaussian beam divergency. This method is very inconvenient for the determination of the output beam divergency of the industrial product such as He-Ne lasers and the measuring unit will occupy a large space. The measurement and the measuring accuracy will be greatly influenced by the environment. Application of the Ronchi ruling to the measurement of far-field divergency of Gaussian beam in near-field is analyzed in the paper. The theoretical research and the experiments show that this measuring method is convenient in industrial application. The measuring system consists of a precision mechanical unit which scans Gaussian beam with a microdisplaced Ronchi ruling, a signal sampling system, a single-chip microcomputer data processing system and an electronic unit with microprinter output. The characteristics of the system is stable and the repeatability errors of the system are low. The spot size and far-field divergency of visible Gaussian laser beam can be measured with the system.

Paper Details

Date Published: 3 October 1996
PDF: 6 pages
Proc. SPIE 2899, Automated Optical Inspection for Industry, (3 October 1996); doi: 10.1117/12.253084
Show Author Affiliations
Chenbo Zhou, Institute of Optics and Electronics (China)
Li Yang, Institute of Optics and Electronics (China)
Wenli Ma, Institute of Optics and Electronics (China)
Peiying Yan, Institute of Optics and Electronics (China)
Tianquan Fan, Institute of Optics and Electronics (China)
Shangfeng He, Institute of Optics and Electronics (China)

Published in SPIE Proceedings Vol. 2899:
Automated Optical Inspection for Industry
Frederick Y. Wu; Shenghua Ye, Editor(s)

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