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

Details Position actuators for the primary mirror of the W.M. Keck Telescope Position actuators for the primary mirror of the W.M. Keck Telescope

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236.1018m&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

Computer Science

Performance

Active Control, Actuators, Mirrors, Pistons, Positioning Devices (Machinery), Telescopes, Hydraulic Equipment, Infrared Astronomy, Performance Tests, Three Axis Stabilization

Scientific paper

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.

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