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Proceedings Paper

Holographic disk scanner for active infrared sensors
Author(s): Yoshikazu Kawauchi; Ryuuichi Toyoda; Minoru Kimura; Koichi Kawata
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Paper Abstract

A holographic disk scanner for a laser vision sensor that can locate objects under hazardous conditions has been developed. The laser vision system utilizes a CO2 laser with a wavelength of 10.6 micrometers , and has excellent transmission characteristics through an environment of smoke and flames. In designing the holographic disk scanner, the diffraction efficiencies were calculated for substrate materials and grating profiles while considering the relationship between the grating period and the groove depth. Based on the calculations, surface-relief transmission gratings were fabricated using germanium (Ge) as a substrate, thereby obtaining a maximum diffraction efficiency of 62.9%. Using the gratings, a ten-facet holographic disk scanner was constructed. By rotating the scanner at 6000 rpm, high-speed image construction of 7 frames/sec, a resolution of 10 cm, and a field of vision of +/- 4 degree(s) were accomplished.

Paper Details

Date Published: 1 December 1991
PDF: 4 pages
Proc. SPIE 1555, Computer and Optically Generated Holographic Optics; 4th in a Series, (1 December 1991); doi: 10.1117/12.50637
Show Author Affiliations
Yoshikazu Kawauchi, Matsushita Research Institute Tokyo, Inc. (Japan)
Ryuuichi Toyoda, Matsushita Research Institute Tokyo, Inc. (Japan)
Minoru Kimura, Matsushita Research Institute Tokyo, Inc. (Japan)
Koichi Kawata, Matsushita Research Institute Tokyo, Inc. (Japan)


Published in SPIE Proceedings Vol. 1555:
Computer and Optically Generated Holographic Optics; 4th in a Series
Ivan Cindrich; Sing H. Lee, Editor(s)

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