一、前言由于角度可以表示为长度之比,所以许多研究人员和技术人员试验把长度测定方法中精度最高的光干涉法应用于角度测定中。角度干涉仪虽然精度高,但缺点是装置复杂难以使用,这一点随着最近激光干涉测量仪器的研制和实用而有所改进,即使在工作或检验现场,使用 I. INTRODUCTION As the angle can be expressed as the ratio of lengths, many researchers and technicians experiment to apply the most accurate optical interferometry in the length determination method to angle measurement. Although the high degree of accuracy of the angle interferometer, but the disadvantage is that the device is complex and difficult to use, which with the recent development of laser interferometry instruments and practical improvements, even at work or test site, the use of