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Proceedings Paper

Highly sensitive camera tube using avalanche multiplication in an amorphous selenium photoconductive target
Author(s): Kenkichi Tanioka; Kejichi Shidara; Tadaaki Harai
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Paper Abstract

A study has been made of a very sensitive camera tube especially suitable for HDTV. It was found that an experimental camera tube with a photoconductive target of amorphous selenium exhibits high sensitivity with a quantum efficiency greatly in excess of unity at an applied target electric field of the order of i08 V/rn. This phenomenon results from avalanche multiplication in the target. The camera tube which has a selenium target 2 m thick has a sensitivity about 10 times as great as a conventional camera tube. The sensitivity can be increased still further by using a thicker target. Deterioration of the lag and resolution characteristics caused by avalanche multiplication has not been observed. The avalanche-mode target was also exploited in a camera tube for HDTV and the serious problem of a lack of sensitivity in HDTV cameras has been solved dramatically. 1.

Paper Details

Date Published: 12 August 1992
PDF: 11 pages
Proc. SPIE 1656, High-Resolution Sensors and Hybrid Systems, (12 August 1992); doi: 10.1117/12.135889
Show Author Affiliations
Kenkichi Tanioka, NHK Science and Technical Research Labs. (Japan)
Kejichi Shidara, NHK Science and Technical Research Labs. (Japan)
Tadaaki Harai, Hitachi Central Research Lab. (Japan)


Published in SPIE Proceedings Vol. 1656:
High-Resolution Sensors and Hybrid Systems
Morley M. Blouke; Winchyi Chang; Laurence J. Thorpe; Rajinder P. Khosla, Editor(s)

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