Highly sensitive camera tube using avalanche multiplication in an amorphous selenium photoconductive target

Kenkichi Tanioka; Kejichi Shidara; Tadaaki Harai

doi:10.1117/12.135889

12 August 1992 Highly sensitive camera tube using avalanche multiplication in an amorphous selenium photoconductive target

Kenkichi Tanioka, Kejichi Shidara, Tadaaki Harai

Author Affiliations +

Proceedings Volume 1656, High-Resolution Sensors and Hybrid Systems; (1992) https://doi.org/10.1117/12.135889
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

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.

Citation Download Citation

Kenkichi Tanioka, Kejichi Shidara, and Tadaaki Harai "Highly sensitive camera tube using avalanche multiplication in an amorphous selenium photoconductive target", Proc. SPIE 1656, High-Resolution Sensors and Hybrid Systems, (12 August 1992); https://doi.org/10.1117/12.135889

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