Determination of small angular displacement by moire fringes of matched radial-parallel gratings

被引：17

作者：

Kim, BJ ^{[1
]}

Song, JS ^{[1
]}

Kim, JT ^{[1
]}

Jo, JH ^{[1
]}

Chang, S ^{[1
]}

Yuk, KC ^{[1
]}

机构：

[1] KONGJU NATL UNIV, DEPT EDUC PHYS, CHUNGNAM, SOUTH KOREA

来源：

APPLIED OPTICS | 1997年 / 36卷 / 13期

关键词：

Moire techniques; gratings; angular displacement;

D O I：

10.1364/AO.36.002848

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the properties of the moire fringes of matched radial-parallel (MRP) gratings that are useful for the fine visual indication of angular displacements. Moire patterns formed by overlapping two different MRP gratings of angular pitches, P-theta and P-theta' (<P-theta) can provide a simple fringe-counting method for determining both the angle and the direction of the relative angular displacement of the gratings within the accuracy of (P-theta'/M-theta), where M-theta is the angular magnification for radial vernier fringes. (C) 1997 Optical Society of America.

引用

页码：2848 / 2855

页数：8

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