Based on the basic concept of the coupling of LD with the fiber, the principle of operation and operation method of YAG laser welding automatic alignment system for LD/PD modules are given.

从LD与光纤端面耦合的基本概念出发，系统地介绍了用于LD/PD模块化的自动对准YAG激光焊接系统的工作原理和使用方法。

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A new method for large shaft alignment was proposed based on visual laser technology and PSD (position sensitive detector) technology.

提出了一种采用位置敏感探测器(PSD)技术与激光技术相结合实现大型轴系对中检测的新方法。

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This paper introduced, the method about laser alignment using round zone plate, analysed sources and distribution of the method's error in a systematic way.

本文介绍了波带板激光准直的方法，比较系统地分析了波带板激光准直的误差来源和精度分布情况。

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