一、序言光电开关作为检测元件 ,因为不受检测对象物材质的影响 ,而且能够长距离检测 ,在各类机械设备中的应用越来越广 ,特别在自动生产线和无人化工厂中用得非常多 ,其主要用途列于表 1。表 1　光电开关的主要用途检测方法与应用种类放大器内藏型光纤式放大器内藏型放大器分 First, the preamble Photoelectric switch as a detection element, because the material from the test object is not affected, but also long-distance testing, in various types of machinery and equipment more widely used, especially in automatic production lines and unmanned chemical plant use Very large, its main purpose is listed in Table 1. Table 1, the main purpose of the photoelectric switch Detection methods and applications Type Amplifier Built-in fiber amplifier Built-in amplifier points