CAJ | 학술논문

对620 mm口径薄镜面主动光学望远镜进行了主镜面形校正和系统波像差校正实验。主镜支撑结构由轴向36个主动支撑点和侧向6个被动支撑点组成，其中轴向33个支撑点用于主动校正，3个作为虚拟硬点用于控制主镜空间位置；利用研制的Shack-Hartmann(S-H)传感器作为检测设备，采用最小二乘法计算校正力。实验中在对系统校正能力测试的基础上，选择了中低频Zernike像差参与校正。通过将S-H传感器固定在主镜曲率中心位置，完成了主镜在不同俯仰角下的面形校正，将初始状态约0.6λRMS校正到λ/12～/15 RMS。而后通过平行光管发出的星点目标，对望远镜系统进行了波像差校正，使系统波像差从初始约0.65λRMS校正到约0.2λRMS，分辨率由18 lp/mm提高到45 lp/mm。
대620 mm구경박경면주동광학망원경진행료주경면형교정화계통파상차교정실험。주경지탱결구유축향36개주동지탱점화측향6개피동지탱점조성，기중축향33개지탱점용우주동교정，3개작위허의경점용우공제주경공간위치；이용연제적Shack-Hartmann(S-H)전감기작위검측설비，채용최소이승법계산교정력。실험중재대계통교정능력측시적기출상，선택료중저빈Zernike상차삼여교정。통과장S-H전감기고정재주경곡솔중심위치，완성료주경재불동부앙각하적면형교정，장초시상태약0.6λRMS교정도λ/12～/15 RMS。이후통과평행광관발출적성점목표，대망원경계통진행료파상차교정，사계통파상차종초시약0.65λRMS교정도약0.2λRMS，분변솔유18 lp/mm제고도45 lp/mm。
For 620 mm diameter active optics telescope, surface error correction for primary mirror and system wavefront aberration correction experiment were carried out respectively. The support system of primary mirror consisted of 36 axial active supports and 6 lateral passive supports, in which 33 axial supports were used for active correction, and 3 were used as dummy hard points for controlling the position of primary mirror. The Shack-Hartmann wavefront sensor was used as testing equipment and the least square method was used to calculate the active corrective forces. In the experiment, low frequency Zernike terms were selected for correction through analyzing the correction ability of the system. Through fixing the S-H sensor at the curvature center of primary, the mirror surface error correction experiment was carried out at different elevation, and around 0.6λRMS surface error of the initial state can be corrected to λ/12-λ/15 RMS. Then the wavefront error of the telescope system was corrected using the star object of collimator, around 0.65λRMS of the initial state was corrected to 0.2λRMS, and the resolution is improved from 18 lp/mm to 45 lp/mm correspondingly.