Study of a Stellar Interferometer for Astrometry

1. 迈克尔逊恒星干涉仪的构造迈克尔逊恒星干涉仪是在olf PZT观测室用两台独立的对射望远镜构造的。望远镜的尺寸为：主镜直径D=250mm，主镜焦距f_1=750mm，副镜焦距f_2=-7.5mm。底座是德国赤道式的。两台望远镜沿南北方向安装。基线长度为3米。恒星干涉仪孔径的大小迈克尔逊恒星干涉仪的孔径的大小被发现是不敏感的条纹可见性，如果两个孔径相隔较远。利用SIT电视摄像机进行图像检测与处理，对SIT电视摄像机的灵敏度进行了测试，发现当干涉仪的星图在1mm左右时，可以检测到4颗等星。由SIT电视摄像机拍摄的恒星图像和月球图像，在微机和vtr的辅助下进行处理。实验通过观测明亮的恒星（如< α >Cyg），对望远镜系统进行了调整，并对双星望远镜的恒星图像进行了叠加。, < slpha >本身。和木星。介绍了波束合并器和延时补偿器，研究了图像处理软件的开发。

1. Construction of a Michelson stellar interferometerA Michelson stellar interferometer is constructed in the olf PZT observation room with two independent coude telescopes. Dimensions of the telescopes are as follows: the diameter of the primary mirror D=250mm, the focal length of the primary mirror f_1=750mm, the focal length of the secondary mirror f_2=-7.5mm. The mounting is an equatorial of German type. The two telescope are equipped along the north-south direction. The baseline length is 3m. 2. Aperture diameter of the stellar interferometerSizes of the aperture of a Michelson stellar interferometer are found to be insensitive on fringe visibility, provided that two apertures are separated for a long distance.3. Image detection and process with SIT TV cameraSensitivity of SIT TV camera was tested and it was found that 4 mag stars can be detected when the star image is about 1mm for the interferometer. Stellar images and Moon images taken by SIT TV camera are processed with the aid of a microcomputer and VTR.4. ExperimentsAdjustments of the telescope system and superpositions of stellar images of the coude telescopes were carried out by observing bright stars, such as <alpha>Cyg., <slpha>Aur. and Jupiter. Introduction of the beam combiner and the delay compensator, development of image processing software are studied in this work.