Development of Rapid Active Figure Control Systems for Large Telescope Mirrors

大型望远镜镜快速主动形控制系统的开发

基本信息

批准号：
01840002
负责人：
KODAIRA Keiichi
金额：
$ 6.02万
依托单位：
National Astronomical Observatory
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01840002/
关键词：
Large Telescope Mirror Surface Measurement Active Optics Adaptive Optics Image Stabilizer Servo Control 大望遠鏡

项目摘要

National Astronomical Observatory is planning to build an 8m telescope (Japan National Large Telescope : JNLT) for optical and infrared astronomy on top of Mauna Kea, Hawaii. A thin meniscus primary mirror with an active optics system will be used for JNLT to achieve the best imaging quality at a reasonable cost. Another important innovation to be used for improving the imaging quality of JNLT is the adaptive optics system. The wavefront aberration due to the atmospheric turbulence is measured and quickly compensated for by rapid adaptive optical components.The achievements of the present research in these regards are as follows :(1) An automatic control system in a closed loop to operate the active optics of a 62cm engineering telescope was established.(2) The turn around time of the control loop was shortened by a factor of about two by improving algorithms.(3) A new type damper system using magnetic fluid was developed for JNLT actuators.(4) Micro thermal convection arising from the mirror during night time was precisely measured and analyzed.(5) An image stabilizer, which measures the rapid image motion of a star due to the atmospheric turbulence and compensates for this motion by a servo control, was successfully constructed.(6) Very thin glass mirrors and piezo-electric actuators to constitute an adaptive optics system were developed and characterized.

国家天文天文台计划在夏威夷Mauna Kea的顶部建造一个800万望远镜（日本国家大型望远镜：JNLT），用于光学和红外天文学。带有主动光学系统的薄薄弯面镜将用于JNLT，以合理的成本获得最佳的成像质量。自适应光学系统是改善JNLT成像质量的另一个重要创新。通过快速的自适应光学组件来测量并快速补偿由于大气湍流而引起的波前像差。在这些方面，本研究的成就如下：（1）封闭循环中的自动控制系统以操作62cm工程望远镜的转化为62cm工程的主动选择。（3）为JNLT致动器开发了一种新型的阻尼器系统。（4）精确测量和分析了在夜间由镜子引起的微热对流。（5）图像稳定剂，该图像稳定剂，该图像稳定剂衡量了由于大气湍流而导致的恒星运动的快速图像，并通过玻璃构造了玻璃，并成功地构造了玻璃，6. 6 serve serve serve serve the Serve（6）。开发并表征了构成自适应光学系统的压电 - 电动执行器。