Collimation testing using a circular Dammann grating

被引：19

作者：

Zhao, Shual ^{[1
]}

Chung, Po Sheun ^{[1
]}

机构：

[1] City Univ Hong Kong, Dept Elect & Elect Engn, Kowloon, Hong Kong, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2007年 / 279卷 / 01期

关键词：

collimation; diffractive optics; gratings; optical testing;

D O I：

10.1016/j.optcom.2007.06.051

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel technique for collimation testing with a circular Dammann grating is proposed. When the beam under test is incident on a one-order circular Dammann grating with limited aperture, double-humped radial rings will be generated at the back focal plane of a focusing tens. If the beam is collimated, the separation between the two rings will reach its minimal, otherwise the two rings will be apart from each other. Therefore, the degree of collimation of the tested beam can be estimated from the separation. The principle and experimental results of the method are presented. Owing to the simplicity and low cost of the method, it is a promising method for quickly checking the collimation of a laser beam. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1 / 6

页数：6

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