光学精密工程
光學精密工程
광학정밀공정
OPTICS AND PRECISION ENGINEERING
2010年
3期
563-569
,共7页
林旭东%陈涛%王建立%杨飞%张景旭%明名%张丽敏%陈宝刚%李宏壮%王富国
林旭東%陳濤%王建立%楊飛%張景旭%明名%張麗敏%陳寶剛%李宏壯%王富國
림욱동%진도%왕건립%양비%장경욱%명명%장려민%진보강%리굉장%왕부국
拼接镜%共焦%Shack-Hartmann传感器
拼接鏡%共焦%Shack-Hartmann傳感器
병접경%공초%Shack-Hartmann전감기
segmented mirror%co-focus%Shack-Hartmann sensor
为了实现对拼接镜的共焦调整,建立了拼接镜主动光学共焦实验系统.实验中,拼接镜由3块对边长300 mm的正六边形子镜组成,子镜为球面,曲率半径为2 000 mm.采用Shack-Hartmann传感器进行共焦测量,用6个微位移平移台对两块子镜的离焦和倾斜进行调整.每个子镜对应Shack-Hartmann传感器的36个子孔径,用子孔径产生的像点位置偏移计算子镜之间的共焦误差.通过微位移平台调整,可控制子镜的轴向离焦误差优于1 μm rms,倾斜误差在两维方向上均优于0.02″ rms.实验表明,该方法适用于大型拼接镜面望远镜的共焦标定和实时调整.
為瞭實現對拼接鏡的共焦調整,建立瞭拼接鏡主動光學共焦實驗繫統.實驗中,拼接鏡由3塊對邊長300 mm的正六邊形子鏡組成,子鏡為毬麵,麯率半徑為2 000 mm.採用Shack-Hartmann傳感器進行共焦測量,用6箇微位移平移檯對兩塊子鏡的離焦和傾斜進行調整.每箇子鏡對應Shack-Hartmann傳感器的36箇子孔徑,用子孔徑產生的像點位置偏移計算子鏡之間的共焦誤差.通過微位移平檯調整,可控製子鏡的軸嚮離焦誤差優于1 μm rms,傾斜誤差在兩維方嚮上均優于0.02″ rms.實驗錶明,該方法適用于大型拼接鏡麵望遠鏡的共焦標定和實時調整.
위료실현대병접경적공초조정,건립료병접경주동광학공초실험계통.실험중,병접경유3괴대변장300 mm적정륙변형자경조성,자경위구면,곡솔반경위2 000 mm.채용Shack-Hartmann전감기진행공초측량,용6개미위이평이태대량괴자경적리초화경사진행조정.매개자경대응Shack-Hartmann전감기적36개자공경,용자공경산생적상점위치편이계산자경지간적공초오차.통과미위이평태조정,가공제자경적축향리초오차우우1 μm rms,경사오차재량유방향상균우우0.02″ rms.실험표명,해방법괄용우대형병접경면망원경적공초표정화실시조정.
A co-focus experiment system of segmented-mirror active optics is built to realize the co-focus fine-tuning of a segmented-mirror. In this system, the segmented-mirror consists of three hexagonal submirrors with 300 mm side to side, and the shape of each submirror is spherical with 2 000 mm radius. A Shack-Hartmann sensor is used for co-focus measurement, and six micro-displacement translation stages in this system are used for adjusting the co-focus and tilt of the two sub mirrors. Each sub-mirror corresponds to 36 sub-apertures of the Shack-Hartmann sensor,and the co-focus errors can be calculated by the position deviation of the spots formed by the sub-apertures. After fine-tuning for micro-displacement translation stages, the rms de-focus error in the optical axis direction and the rms tilt errors in two orthogonal dimentions of the sub mirror can be controlled to less than 1 μm and 0.02″,respectivelly. The experiment shows that the method used in this system is also compatible to the co-focus calibration and real time adjustment of the large segmented mirror telescope.
