A simple method for testing laser beam collimation

被引：13
|
作者：
Mehta, DS [1 ]
Kandpal, HC [1 ]
机构：
[1] Natl Phys Lab, New Delhi 110012, India
来源：
OPTICS AND LASER TECHNOLOGY | 1997年 / 29卷 / 08期
关键词：
laser beam collimation; one-dimensional periodicity; moire fringe patterns;
D O I：
10.1016/S0030-3992(97)00033-9
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A simple and improved method is proposed for testing laser beam collimation by a new type of grating, comprising concentric equilateral triangles and the mirror images of these triangles, Although this type of grating possesses one-dimensional periodicity in a particular direction and inherent defects in periodicity, the moire fringe pattern formed by placing an exact replica of such a grating at its self-imaging plane shows that the self-imaging phenomenon takes care of the defects in the periodic objects. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：469 / 473
页数：5
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