Photocathodes

Carl M. Thomas

doi:10.1117/12.953866

1 March 1974 Photocathodes

Carl M. Thomas

Proceedings Volume 0042, Image Intensifiers: Technology, Performance, Requirements, and Applications; (1974) https://doi.org/10.1117/12.953866
Event: Annual Technical Symposium, 1973, San Diego, United States

Abstract

This survey of photocathode research for image intensifiers will begin by defining a photocathode and describing briefly a few general properties and principles of its operation for the benefit of those unfamiliar with the terminology of the field. Basically, a photocathode is a thin film of material inside the faceplate of the image intensifier tube which converts the incoming radiation or photon flux into photoelectrons as illustrated schematically in Figure 1. The photoelectrons thus generated move through the film to the free surface where they are emitted into vacuum for further processing. If the input photon flux contains focussed image information, this image is faithfully reproduced, in principle, as an intensity distribution of photoelectrons emitted from the photocathode surface.

Citation Download Citation

Carl M. Thomas "Photocathodes", Proc. SPIE 0042, Image Intensifiers: Technology, Performance, Requirements, and Applications, (1 March 1974); https://doi.org/10.1117/12.953866

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