1 July 1986 Vision System With Ranging For Maneuvering In Space
Author Affiliations +
Automated rendezvous, stationkeeping, and docking, as well as robot vison for space construction, require a compact, rugged system to provide two-and three-dimensional (range) images. The system proposed in this paper consists of a module having a transmitter array of laser diodes and a single detector/receiver that covers the full field of view (FOV) of the module. Each diode in the array is imaged on a pixel in the FOV. Sinusoidal intensity modulation is used such that the range at each pixel can be determined by phase comparison of the transmitted and received signals. The system FOV can be expanded by using multiple modules. The laser diode modulation frequency is initially low to determine coarse range without ambiguities. It is then increased in sequential steps to reach the desired accuracy for a given range. Because the scanning is accomplished by individually illuminating elements in the diode array, the scanning is achieved with no moving parts, and the pixels in the FOV can be randomly accessed. Preliminary results demonstrated a 15 cm range accuracy with an uncooperative target at a range of 13 m in bright sunlight.
W. Thomas Cathey, W. Thomas Cathey, Walter C. Davis, Walter C. Davis, } "Vision System With Ranging For Maneuvering In Space," Optical Engineering 25(7), 257821 (1 July 1986). https://doi.org/10.1117/12.7973913 . Submission:


High power multi beam diode laser transmitter for a flash...
Proceedings of SPIE (October 14 2013)
3D ranging with a single-photon imaging array
Proceedings of SPIE (February 16 2011)
Three-dimensional contouring by an optical radar system
Proceedings of SPIE (January 05 1994)
Distance Measurement Using Laser Diodes
Proceedings of SPIE (October 28 1989)
RF Modulation Of A High Power Gaaias Laser Diode Array
Proceedings of SPIE (October 30 1980)

Back to Top