Indexing system for optical beam steering

Details Indexing system for optical beam steering Indexing system for optical beam steering

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1340..361s&link_type=abstract

IN: Cryogenic optical systems and instruments IV; Proceedings of the Meeting, San Diego, CA, July 10-12, 1990 (A92-22851 08-31).

Computer Science

Beam Leads, Infrared Telescopes, Instrument Orientation, Light Beams, Optical Equipment, Positioning Devices (Machinery), Alignment, Cryogenic Equipment, Indexes, Pointing Control Systems, Space Infrared Telescope Facility

Scientific paper

This paper describes the design and testing of an indexing system for optical-beam steering. The cryogenic beam-steering mechanism is a 360-degree rotation device capable of discrete, high-precision alignment positions. It uses low-precision components for its rough alignment and kinematic design to meet its stringent repeatability and stability requirements (of about 5 arcsec). The principal advantages of this design include a decoupling of the low-precision, large angular motion from the high-precision alignment, and a power-off alignment position that potentially extends the life or hold time of cryogenic systems. An alternate design, which takes advantage of these attributes while reducing overall motion, is also presented. Preliminary test results show the kinematic mount capable of sub-arc second repeatability.

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