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1.中国科学院 长春光学精密机械与物理研究所,吉林 长春 130033
2.中国科学院大学,北京 100049
[ "罗 敬(1992-),男,江西抚州人,博士,助理研究员,主要从事光学装调与检测、光学系统偏振像差分析与优化等方面的研究。E-mail: luojingopt@ciomp.ac.cn" ]
[ "徐抒岩(1963-),男,吉林长春人,硕士,研究员,博士生导师,参加省部级课题及国防科研重点工程项目多项,发表学术论文100余篇,荣获中国载人航天工程突出贡献奖章,曾宪梓载人航天基金突出贡献奖,主要研究方向为空间大口径光学望远镜、光学系统空间在轨组装等。Email: xusy@ciomp.ac.cn" ]
收稿日期:2021-12-27,
修回日期:2022-01-14,
纸质出版日期:2022-04-10
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罗敬,王金鑫,鞠国浩等.主动随机送风条件下大口径离轴三反光学系统的计算机辅助装调[J].光学精密工程,2022,30(07):802-812.
LUO Jing,WANG Jinxin,JU Guohao,et al.Computer-aided alignment for large-aperture off-axis three mirrors optical system with artificially random air flow[J].Optics and Precision Engineering,2022,30(07):802-812.
罗敬,王金鑫,鞠国浩等.主动随机送风条件下大口径离轴三反光学系统的计算机辅助装调[J].光学精密工程,2022,30(07):802-812. DOI: 10.37188/OPE.20223007.0802.
LUO Jing,WANG Jinxin,JU Guohao,et al.Computer-aided alignment for large-aperture off-axis three mirrors optical system with artificially random air flow[J].Optics and Precision Engineering,2022,30(07):802-812. DOI: 10.37188/OPE.20223007.0802.
气流扰动是决定大口径、长焦距光学系统波前检测精度的重要因素,进而影响光学系统装调的效率和质量。针对该问题,提出采取主动随机送风来抑制气流扰动对波前检测的影响。实验结果表明,通过主动随机送风,可以提高系统波前检测的稳定性,Zernike系数测量结果标准差由0.04降低到0.01以下。进一步地,在主动随机送风条件下完成了一个0.5 m有效通光口径,6 m焦距的离轴三反消像散光学系统的计算机辅助装调。经过两轮迭代,系统波像差RMS平均值由0.49
λ
降低到0.086
λ
,满足系统像质要求。通过主动随机送风可以有效地抑制气流扰动对大口径、长焦距光学系统波前检测的影响,从而为计算机辅助装调提供稳定、正确的波前数据,提高了系统装调的效率和质量,这对于研制大口径光学系统具有重要意义。
Airflow disturbance becomes critical to wavefront measurements in large-aperture and long focal length optical systems. Hence, airflow disturbances have significant impact on the efficiency and quality of optical alignment. To solve this problem, a method based on an active random air supply is proposed to suppress the influence of air flow disturbances on wavefront measurements. The experimental results show that the standard deviations of the obtained Zernike coefficients are reduced to below 0.01 from 0.04 due to the active random air supply. Furthermore, an off-axis three-mirror anastigmat telescope whose clear aperture is 0.5 m and focal length is 6 m is aligned when random air is actively supplied. After two rounds of computer-aided alignment, the mean RMS of the wavefront error of the optical system is reduced to 0.086
λ
from 0.49
λ
, which meets the requirements of the system image quality index. Evidently, the influences of airflow disturbance on wavefront measurements in large aperture and long focal length optical systems can be effectively suppressed by an active random air supply, which is critical to optical alignment in terms of efficiency and quality. This study is of great significance for developing large aperture optical systems.
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