定天镜

塔高约21m，定天镜口径460mm，成象镜口径330mm，主焦距21m，卡式焦距40m，相应的太阳像直径分别为200mm和373mm。

The aperture of the coelostat mirror is 460 mm . The objective mirror , 330 mm in diameter , has primary focal length of 21 m and Cassegrain focal length of 40 m , corresponding solar image with diameter 200 mm and 373 mm respectively .

1980年2月16日日全食时，我们在云南省瑞丽县用一架无缝光谱仪成功地进行了一次闪光光谱观测。仪器由定天镜供光，平均色散度为5.7/mm。

A successful observation of the flash spectrum was made by a slitless spectrograph in Bui-Li county , Yun-Nan province during the total solar eclipse of Feb. 16 , 1980 . The spectrograph fed by a coelostat has an average dispersion of 5.7 A / mm .

定天镜伺服驱动系统的软件设计

A Software Design for Servo System of Siderostats