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Proceedings Paper

Radiation Responses Of Pure-Silica Core Image Guides
Author(s): H. Hayami; T. Shintani; K. Suzuki; T. Ishitani
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Paper Abstract

Radiation resistivity of pure-silica core image guides were investigated in terms of incremental spectral loss and quality of pictures transmitted through the image guides. Radiation-induced spectral losses were measured so as to clarify the dependences of radiation resistivity on such parameters as core materials (OH and Cl contents), picture element dimensions (core packing density and cladding thickness), number of picture elements and drawing conditions. As the results, an image guide with OH-and Cl-free pure-silica core, 30 - 45% in core packing density, and 1.8 - 2.2 μm in cladding thickness showed the lowest loss. The parameters to design the image guide were almost the same as those to obtain a image guide with good picture quality. Radiation resistivity of the image guide was not dependent on drawing conditions and number of picture elements, indicating that the image guide has large tolerances .in production conditions and that reliable quality is constantly obtained in production. Radiation resistivity under high total doses was evaluated using the image guide with the lowest radiation-induced loss. Maximum usable lengths of the image guide for practical use under specific high total doses and maximum allowable total doses for the image guide in specific lengths were obtained by the extrapolating method. Picture quality in terms of radiation-induced degradation in color fidelty in the pictures transmitted through image guides was quantitatively evaluated on the a chromaticity diagram based on the CIE standard colorimetric system and on the color specification charts according to three attributes of colors. The image guide with the least spectral incremental loss gives the least radiation-induced degradation in color fidelty in the pictures as well.

Paper Details

Date Published: 26 April 1989
PDF: 14 pages
Proc. SPIE 0992, Fiber Optics Reliability: Benign and Adverse Environments II, (26 April 1989); doi: 10.1117/12.960030
Show Author Affiliations
H. Hayami, Mitsubishi Cable Industries, Ltd. (Japan)
T. Shintani, Mitsubishi Cable Industries, Ltd. (Japan)
K. Suzuki, Mitsubishi Cable Industries, Ltd. (Japan)
T. Ishitani, Mitsubishi Cable Industries, Ltd. (Japan)

Published in SPIE Proceedings Vol. 0992:
Fiber Optics Reliability: Benign and Adverse Environments II
Roger A. Greenwell; Dilip K. Paul; Shekhar G. Wadekar, Editor(s)

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