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Proceedings Paper

Use of an optical sensor as a directional antenna
Author(s): Manuel Adler Abreu; Jose Cabrita A. Freitas; Fernando D. Carvalho; Fernando Carvalho Rodrigues
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Paper Abstract

The work presented in this paper is related to the study of a system that uses optical sensors as directional antennas for locating laser sources. The use of large area optical transducers, which have a specific angular gain, allow us to design a system that is sensitive to angular displacements of a laser source within the sensor field of view. Through specific algorithms it is possible to obtain an estimate of the direction of the plane waves striking the sensor head. This can be achieved with a resolution better than 1 degree using only four discrete sensors and covering a 180 degree field of view. Since the estimate of the angular position of the laser source is done on a pulse per pulse basis, this system is not affected by any fluctuation or degradation of the signal during the time of exposure. Sensor modeling, radiometric analysis, and algorithms are presented. Specific trade-offs regarding resolution, angular coverage, and SNR are also discussed.

Paper Details

Date Published: 28 August 1995
PDF: 10 pages
Proc. SPIE 2620, International Conference on Intelligent Manufacturing, (28 August 1995); doi: 10.1117/12.217562
Show Author Affiliations
Manuel Adler Abreu, Instituto Nacional de Engenharia e Tecnologia Industrial (Portugal)
Jose Cabrita A. Freitas, Instituto Nacional de Engenharia e Tecnologia Industrial (Portugal)
Fernando D. Carvalho, Instituto Nacional de Engenharia e Tecnologia Industrial (Portugal)
Fernando Carvalho Rodrigues, Instituto Nacional de Engenharia e Tecnologia Industrial (Portugal)


Published in SPIE Proceedings Vol. 2620:
International Conference on Intelligent Manufacturing
Shuzi Yang; Ji Zhou; Cheng-Gang Li, Editor(s)

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