Active optics experiments with a 62-cm thin mirror

Masanori Iye; Takeshi Noguchi; Yasuo Torii; Yoshitaka Mikami; Yasumasa Yamashita; Wataru Tanaka; Masaki Tabata; Noboru Itoh

doi:10.1117/12.19261

1 July 1990 Active optics experiments with a 62-cm thin mirror

Masanori Iye, Takeshi Noguchi, Yasuo Torii, Yoshitaka Mikami, Yasumasa Yamashita, Wataru Tanaka, Masaki Tabata, Noboru Itoh

Author Affiliations +

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19261
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

An engineering prototype with a 62 cm thin meniscus mirror to investigate the practical problems of the JNLT active optics system has been constructed. The structure and the performance of the prototype and the basis for the control algorithms are described. The stiffness of the mirror and the purity of figure control for the correction of lower order Zernike modes were measured for this system. The results of experiments to control the surface figure of the mirror under varying elevation angle of the telescope or under external force load are reported. The thermal effects on this system were also evaluated.

Citation Download Citation

Masanori Iye, Takeshi Noguchi, Yasuo Torii, Yoshitaka Mikami, Yasumasa Yamashita, Wataru Tanaka, Masaki Tabata, and Noboru Itoh "Active optics experiments with a 62-cm thin mirror", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19261

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