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Proceedings Paper

Active optics experiments with a 62-cm thin mirror
Author(s): Masanori Iye; Takeshi Noguchi; Yasuo Torii; Yoshitaka Mikami; Yasumasa Yamashita; Wataru Tanaka; Masaki Tabata; Noboru Itoh
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Paper 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.

Paper Details

Date Published: 1 July 1990
PDF: 11 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19261
Show Author Affiliations
Masanori Iye, National Astronomical Observatory (Japan)
Takeshi Noguchi, National Astronomical Observatory (Japan)
Yasuo Torii, National Astronomical Observatory (Japan)
Yoshitaka Mikami, National Astronomical Observatory (Japan)
Yasumasa Yamashita, National Astronomical Observatory (Japan)
Wataru Tanaka, Univ. of Tokyo (Japan)
Masaki Tabata, Mitsubishi Electric Corp. (Japan)
Noboru Itoh, Mitsubishi Electric Corp. (Japan)

Published in SPIE Proceedings Vol. 1236:
Advanced Technology Optical Telescopes IV
Lawrence D. Barr, Editor(s)

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