Active correction experiment of a 1.2 m thin primary mirror

Dai, Xiaolin, Xian, Hao, Tang, Jinlong, Zhang, Yudong

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For Russian citation (Opticheskii Zhurnal):

Xiaolin Dai, Hao Xian, Jinlong Tang, and Yudong Zhang Active correction experiment of a 1.2 m thin primary mirror (Эксперимент по активной коррекции тонкого первичного зеркала диаметром 1,2 м) [на англ. яз.] // Оптический журнал. 2019. Т. 86. № 6. С. 20–29. http://doi.org/10.17586/1023-5086-2019-86-06-20-29

Xiaolin Dai, Hao Xian, Jinlong Tang, and Yudong Zhang Active correction experiment of a 1.2 m thin primary mirror (Эксперимент по активной коррекции тонкого первичного зеркала диаметром 1,2 м) [in English] // Opticheskii Zhurnal. 2019. V. 86. № 6. P. 20–29. http://doi.org/10.17586/1023-5086-2019-86-06-20-29

For citation (Journal of Optical Technology):

Xiaolin Dai, Hao Xian, Jinlong Tang, and Yudong Zhang, "Active correction experiment on a 1.2 m thin primary mirror," Journal of Optical Technology. 86(6), 341-349 (2019). https://doi.org/10.1364/JOT.86.000341

Abstract:

In this paper an active optics experiment platform based on a 1.2m thin primary mirror is designed and established. Several experiments are conducted on the platform: the influence functions of the active axial supports are measured; the active optics system’s capability on fitting Zernike aberrations and correcting the mirror’s gravitational deformations are tested. The results show the system’s fitting errors for the first 10 Zernike modes are less than 30%, meanwhile it’s capable to reduce the RMS of the mirror’s gravitational deformation from 1.7λ to less than 0.18λ (λ = 650 nm) by active correction. At last, the influence of the Zernike modes used in the active correction are studied, the results show that as the number of the Zernike modes used in the active correction increases, the residual RMS of the 1.2m mirror’s gravitational deformation decreases and reaches steady when the number rises to over 14.

Keywords:

active optics, thin primary mirror, active correction platform, active correction experiment

OCIS codes: 220.100

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