离轴大口径全反射式平行光管装调技术研究

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英文篇名：Alignment Metrology of an Off-axis Large-diameter Re?ective Collimator 作者：姚梦远 ; 胡中文 ; 姜海娇 英文作者：YAO Meng-yuan;HU Zhong-wen;JIANG Hai-jiao;National Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology,Chinese Academy of Sciences;CAS Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology;University of Chinese Academy of Sciences; 关键词：仪器 ; 光谱仪 ; 方法 ; 数据分析 ; 现场测试 英文关键词：instrumentation:spectrographs;;methods:data analysis;;site testing 中文刊名：TWXB 英文刊名：Acta Astronomica Sinica 机构：中国科学院国家天文台南京天文光学技术研究所;中国科学院天文光学技术重点实验室(南京天文光学技术研究所);中国科学院大学; 出版日期：2019-03-20 11:00 出版单位：天文学报 年：2019 期：v.60 基金：国家自然科学基金项目(11873013、11403068);; 天文财政专项“无缝光谱仪关键技术研究”资助 语种：中文; 页：TWXB201902006 页数：9 CN：02 ISSN：32-1113/P 分类号：64-72

摘要

随着空间光学系统的发展,光学检测设备的精度要求也更高.介绍了一套口径525 mm、大视场离轴平行光管光学系统的高精度计算机辅助装调方法.该大型平行光管要求全视场波像差优于1/20波长,给装调策略带来了挑战.该方法基于多视场点灵敏度矩阵模型,利用5个不同视场点干涉测得的像差数据,采用阻尼最小二乘法求解系统失调量.通过多次迭代装调,快速成功完成装调,在波长λ=632.8 nm时,该平行光管系统取得了中心视场点波像差均方根粗糙度(rms)值0.036λ、全像面波像差rms平均值0.045λ的装调精度.
        Requirements in imaging quality of space astronomical optic systems are increasing. Higher performance on their ground optical detection equipment are required. The alignment strategy and meteorology method are introduced for an off-axis collimator with a diameter of 525 mm dedicated to the measurement of imaging performance of the diffraction gratings in space application. The collimator has a high sensitivity to environment and adjustment, and tuning parameters are coupled with each other. By sampling and fitting wave aberrations of appropriate five field positions, and damping least square method, the misalignments are reduced more efficiently.Finally, the wavefront error of center field is better than 0.036λ(wavelength λ is 632.8 nm), and the wavefront error over full field of view is better than 0.045λ.

引文

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