光学 精密工程, 2016, 24 (6): 1272, 网络出版: 2016-08-18   

桌面97单元自适应光学系统性能测试

Performance testing of a desk-top 97-element adaptive optical system
作者单位
中国科学院 长春光学精密机械与物理研究所,吉林 长春 130033
摘要
构建了一套桌面自适应光学系统性能测试系统,用以验证97单元自适应光学系统的校正能力。该测试系统主要由光源、快速控制反射镜、变形镜、Shack-Hartmann波前传感器、高速波前处理器、扰动相位屏等部件组成,分别利用干涉仪和Shack-Hartmann波前传感器的数据控制变形镜进行光路的展平校正,得到了系统的静态校正精度。然后,测试了精密跟踪系统的校正能力。最后,利用扰动相位屏模拟不同的大气扰动条件,以成像相机图像的斯特列尔比(SR)为指标,在不同目标亮度下测试了自适应光学系统的动态校正能力。测试结果显示: 该97单元自适应光学系统的静态波像差校正精度的RMS接近λ/20; 两种控制模式下精密跟踪系统的误差抑制带宽分别达到了15 Hz和39 Hz; 系统在强湍流情况下,动态校正后的成像分辨率基本优于3倍衍射极限。由此表明,97单元自适应光学系统能够有效地校正像差,提高成像分辨率。
Abstract
A set of performance test system of the desktop adaptive optical system was established to verify the correction capability of a 97-element adaptive optical system. The test system mainly consisted of such components as the light source, fast steering mirror, deformable mirror, Shack-Hartmann wave-front sensor, fast wave-front processor and disturbance phase screen. The data of the interferometer and Shack-Hartmann wave-front sensor were employed to control the deformable mirror for the flattening correction of optical path and the static correction precision of the system was obtained. Then, the correction capability of the precision tracking system was tested. Finally, the disturbance phase screen was use to simulate different atmospheric disturbance conditions and the dynamic correction capability of the adaptive optical system was tested under different degrees of target brightness with the Strehl Ratio (SR) of the imaging camera image being the index. The results show that: the RMS of the static wave aberration correction precision of the 97-element adaptive optical system is approximate λ/20; the error suppression bandwidths of the precision tracking system under two control modes can respectively reach 15 Hz and 39 Hz; when the system is under the strong turbulence, the imaging resolution after dynamic correction is basically superior to three times of diffraction limit. It indicates that the 97-element adaptive optical system can effectively correct the aberration and improve the imaging resolution.

林旭东, 刘欣悦, 王帅, 王建立, 卫沛锋, 王亮, 贾建禄, 陈宝刚, 汪宗洋, 姚凯男. 桌面97单元自适应光学系统性能测试[J]. 光学 精密工程, 2016, 24(6): 1272. LIN Xu-dong, LIU Xin-yue, WANG Shuai, WANG Jian-li, WEI Pei-feng, WANG Liang, JIA Jian-lu, CHEN Bao-gang, WANG Zong-yang, YAO Kai-nan. Performance testing of a desk-top 97-element adaptive optical system[J]. Optics and Precision Engineering, 2016, 24(6): 1272.

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