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Proceedings Paper

New techniques to apply an optical fiber image guide to harsh radiation environments in nuclear facilities
Author(s): Atsushi Kimura; Eiji Takada; Yoneichi Hosono; Masaharu Nakazawa; Hiroyuki Takahashi; Hiroyuki Hayami
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Paper Abstract

To apply optical fiber image guide (IG) to harsh radiation environments, we have developed two new techniques. One technique is a visible type IG with a color correcting system and the other technique is an IR type IG. We irradiated the IGs utilizing a 60Co gamma source. Measured Images with the visible type IG became dark and yellowish because of radiation induced loss. By using a color correction system, the original color of the images can be obtained. In the case of IR type IG, because of low radiation induced loss in the IR region, the degree of darkening was less than half of that for the visible type of IG. For a fixed irradiated length of 2.5m, the dose limit for using IG was estimated to be 4.6 X 108 with the visible type IG and 1.2 X 109 with the IR type IG. These radiation resistivities were more than 103 times of that for usual CCD cameras. With these techniques, IG can be applied to harsh radiation environment.

Paper Details

Date Published: 11 January 1999
PDF: 8 pages
Proc. SPIE 3538, Process Monitoring with Optical Fibers and Harsh Environment Sensors, (11 January 1999); doi: 10.1117/12.335761
Show Author Affiliations
Atsushi Kimura, Univ. of Tokyo (Japan)
Eiji Takada, Univ. of Tokyo (Japan)
Yoneichi Hosono, Univ. of Tokyo (Japan)
Masaharu Nakazawa, Univ. of Tokyo (Japan)
Hiroyuki Takahashi, Univ. of Tokyo (Japan)
Hiroyuki Hayami, Mitsubishi Cable Industries, Ltd. (Japan)

Published in SPIE Proceedings Vol. 3538:
Process Monitoring with Optical Fibers and Harsh Environment Sensors
Michael A. Marcus; Michael A. Marcus; Anbo Wang, Editor(s)

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