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一、前言与许多普通测量法相比,采用光学技术的非接触监测和测量具有许多优点。激光二极管是一种大功率的近红外辐射小光源,适用于硅光电探测器。由于通过直流激励容易产生平行光束,使得激光二极管是测量一系列机械参数的理想光源。工业上可利用的激光二极管主要有三种:
I. INTRODUCTION Non-contact monitoring and measurement using optical techniques have many advantages over many common measurement methods. Laser diode is a high-power, small source of near-infrared radiation suitable for use in silicon photodetectors. Laser diodes are the ideal source for measuring a range of mechanical parameters due to the easy generation of parallel beams by DC excitation. There are three main types of industrially available laser diodes: