Position actuators for the primary mirror of the W. M. Keck telescope

John D. Meng; J. Franck; George Gabor; Richard C. Jared; Robert H. Minor; Barbara A. Schaefer

doi:10.1117/12.19269

1 July 1990 Position actuators for the primary mirror of the W. M. Keck telescope

John D. Meng, J. Franck, George Gabor, Richard C. Jared, Robert H. Minor, Barbara A. Schaefer

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19269
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

The pistons and tilts of the 36 segments of the Keck Telescope primary mirror are under active control. The mechanical and electronic designs of the actuators used to achieve this control are described along with the performance of the actuators under a variety of tests. In use, the actuators will move in 4-nm increments. This resolution and the accuracy of the actuator moves are adequate for stabilizing the figure of the primary mirror to the precision required for optical and infrared astronomy.

Citation Download Citation

John D. Meng, J. Franck, George Gabor, Richard C. Jared, Robert H. Minor, and Barbara A. Schaefer "Position actuators for the primary mirror of the W. M. Keck telescope", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19269

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