High-Sensivity Television as an Aid to Low-Light-Level Photographic Recording

High-sensitivity closed-circuit television equipment can be used as an aid to recording a scene where the effective exposure limitation is below the capability of direct photography. The monitor presentation is photographed by normal techniques. The effective speed of such systems has been increased rapidly during the past three years. Equivalent ASA ratings in excess of 100,000 are now available. — The sensitivity of a well-designed closed-circuit television equipment is determined primarily by the pickup tube and the optics. The most sensitive tube available for the past several years has been the image orthicon or its variations. The sensitivity has been increased to the point that the statistical variation in light photons received is a limitation. The characteristics of these tubes, mode of operation and relative sensitivity are discussed.

Print ISSN

0361-4573

Published

1961-09

Content type

Original Research

DOI

10.5594/J09384