一、引言多光束干涉及其应用是物理光学、激光和光谱实验教学中的重要内容,以多光束干涉原理而设计制作的干涉仪和法布理—珀罗标准具(简称FPE)在光学、光谱学和长度计量等方面有广泛的应用。在激光技术中F—P扫描干涉仪和FPE被用作为光谱分析器,研究光谱线的精细结构和超精细结构、测量线宽,压窄荧光和激光输出线宽和腔内选模等。目前虽已有共焦腔扫描干涉仪的产品出售,但一般实验室却很少具备,此外,平面型F—P干涉仪还有其本身的特点,所以为满足教学实验和研究工 I. INTRODUCTION The multi-beam interference and its application are the important contents in the experiment of physics optics, laser and spectrum. The interferometer and Fabry-Perot etalon (FPE) Spectroscopy and length measurement has a wide range of applications. In laser technology, F-P scanning interferometers and FPE are used as spectrum analyzers to study the fine structure and ultrafine structure of spectral lines, measuring the line width, narrowing the fluorescence and laser output line width, and selecting cavity modes. Although the confocal cavity scanning interferometer currently available for sale, but the general laboratory is rarely available, in addition, the planar F-P interferometer also has its own characteristics, so to meet the teaching experiments and research workers