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

Publisher Website
Google Scholar
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.

This publication has 0 references indexed in Scilit: