Wave Propagation in Turbulent Media and Adaptive Optics

为建立高分辨率观测的自适应光学系统，开展了以下研究：(1)1993年和1994年分别举办了两次为期三天的“湍流介质中的波传播与自适应光学”研讨会。这些密集的研讨会对促进相关领域研究人员之间的合作研究非常有用。本次研讨会的会议记录将刊登在《研究成果报告》中。(2)制备了专门用于低噪声波前传感器的硅雪崩光电二极管（APD），并对其进行了评价。实验证明，用于光子计数模式的apd具有高达60%的光子探测效率、200nsec的短死区时间和较低的热背景可接受水平。(3)对专为冈山188cm望远镜红外Coude光谱仪制造的稳像器进行了标定，并制作了专门设计的圆顶视象监测器。(4)组装光学干涉仪系统，采用孔径掩模法对双星进行观测。提出了光学干涉仪和红外干涉仪的长期发展规划。(5)对高功率激光的波前测量与控制进行了研究。值得注意的是，目前的项目产生了参与这一新的科学领域的研究人员之间的一些合作项目。

The folloing researches were carried out to establish adaptive optics systems for high resolution observations :(1) Two workshops on "Wave Propagation in Turbulent Media and Adaptive Optics" were held in 1993 and in 1994 for three days each. These intensive workshops were very useful to promote collaborative researches among the resaerchers working in the related fields. The proceedings of this workshop will be printed in the Report of the Research Achievments.(2) Silicon avalanche photodiodes (APD) specially designed for use as low-noise wavefront sensors were fabricated and evaluated. The APDs used in the photon counting mode were proved to show high photon detection efficiency of 60%, short dead time of 200nsec, and low acceptable level of thermal background.(3) The image stablizer manufactured for use at the infrared Coude spectrograph of Okayama 188cm telescope was calibrated and the dome seeing monitor specially designed were manufactured.(4) Optical interferometer system was assembled and observation of double stars were made using an aperture masking method. Long term plans for optical and infrared interferometer were proposed.(5) Wavefront measurement and control to gain the efficiency of high power laser were studied.It is important to note that the present project yielded some collaborative projects among the researchers involved in this new field of science.