长期以来,光学比较仪一直是一种应用比较广泛的测量仪器。它的基本原理到现在没有多大改变。但是随着光电技术的发展和计算机的普遍使用,光学非接触检测的概念也在迅速地改变。检测必须快,必须跟上愈来愈快的制造速度。多年来,检测速度比制造要慢得多,以前用抽样的办法来检查大批产品的质量,而现在则要求对产品进行100％检测。在这种情况下,光学比较仪已经发展 For a long time, optical comparator has been a widely used measuring instruments. Its basic principle has not changed much now. However, with the development of optoelectronic technology and the widespread use of computers, the concept of optical non-contact detection is rapidly changing. Testing must be fast and must keep pace with faster manufacturing speeds. Over the years, the test was much slower than manufacturing. Previously, sampling was used to check the quality of a large number of products, and now the product is required to be 100% tested. In this case, optical comparators have been developed