Development of the phase measurement system for segmented mirror telescope

本研究针对京都3.8米分块镜望远镜的分块镜控制技术进行了研究，其精度为1/20波长。与现有的利用自然星体的方法不同，该方法可以利用5色激光快速地测量出每个分段镜的相对位置，而不受大气或天气的干扰。结合原有的高精度驱动器，我们成功地利用真实的望远镜的复制件来调整分段反射镜的位置。

In this study, the control technology of segment mirrors for Kyoto 3.8m segmented-mirror telescope with an accuracy of 1/20 wavelength has been developed. Different from the existing procedure using natural stars, the relative position of each segment mirror can be measured quickly with this procedure using a 5-color laser, without disturbances of atmosphere or weather. In combination with the original high-accuracy actuator, we could adjust the position of segment mirrors using a duplicated part of the real telescope successfully.