Physics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1218..129m&link_type=abstract
IN: Free-space laser communication technologies II; Proceedings of the Meeting, Los Angeles, CA, Jan. 15-17, 1990 (A91-22776 08-
Physics
Optical Measuring Instruments, Optical Tracking, Satellite Communication, Satellite Networks, Semiconductor Lasers, Aerospace Industry, Laser Beams, Optical Communication, Space Communication
Scientific paper
Two tracking sensor breadbroads have been developed for the European SILEX program. Critical requirements to be met by these sensors include the determination of the 1-sigma position of the focused laser spot on the detector surface to accuracies of less than 100 nm, with update frequencies as high as 8 kHz, and the minimum optical power level of 110 pW. The design is based on the use of a 14 x 14 pixel CCD array, where the spot position is determined to small subpixel accuracies over the central 2 x 2 pixel area via a centroiding algorithm executed in a microprocessor. Coarse position measurements are also made over the full area at rates up to 2 kHz.
Beard Christopher I.
Mathur Rajul P.
Purll David J.
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