Active optics experiments with a 62 cm thin mirror

Details Active optics experiments with a 62 cm thin mirror Active optics experiments with a 62 cm thin mirror

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..929i&link_type=abstract

IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 2 (A91-23201 08-89

Physics

Optics

4

Adaptive Optics, Algorithms, Equipment Specifications, Mirrors, Telescopes, Temperature Effects, Aberration, Actuators, Adaptive Control, Astigmatism, Optical Equipment, Seeing (Astronomy)

Scientific paper

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.

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