Sensing Characteristics of A Precision Aligner Using Moire Gratings for Precision Alignment System

被引：2
|
作者：
ZHOU Lizhong (Department of Electronic Engineering
机构：
来源：
Chinese Journal of Lasers | 2001年 / 04期
关键词：
moire gratings; sensing characteristics; alignment accuracy;
D O I：
暂无
中图分类号：
TN253 [光纤元件];
学科分类号：
摘要：
Sensing characteristics of a precision aligner using moire gratings for precision alignment sysem has been investigated. A differential moire alignment system and a modified alignment system were used. The influence of the setting accuracy of the gap length and inclination of gratings on the alignment accuracy has been studied experimentally and theoretically. Setting accuracy of the gap length less than 2.5μm is required in modified moire alignment. There is no influence of the gap length on the alignment accuracy in the differential alignment system. The inclination affects alignment accuracies in both differential and modified moire alignment systems.
引用
收藏
页码：17 / 22
页数：6
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