Accession Number : ADD015770

Title :   Interference Photocathode.

Descriptive Note : Patent Application, filed 26 May 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Seely, John F ; Hunter, William R

Report Date : 26 May 1992

Pagination or Media Count : 26

Abstract : It is an object of the present invention to selectively reduce sensitivity to radiation of one wavelength while selectively enhancing sensitivity to radiation of a second wavelength, different from the first wavelength, in a photocathode. To achieve this and other objects made apparent hereinafter, the invention concerns a photocathode having a reflector for reflecting incident electromagnetic radiation, and an interference means for causing interference of electromagnetic radiation reflected from the reflector and incident electromagnetic radiation. The reflector and the interference means are adapted to cause the interference to result in an electromagnetic field zero at or near the surface of the interference means for incident electromagnetic radiation at a first selected wavelength, and to cause an electromagnetic field maximum at or near the surface for a second preselected electromagnetic wavelength

Descriptors :   *PHOTOCATHODES, *PATENT APPLICATIONS, *PHOTOELECTRIC MATERIALS, INTERFERENCE, PHOTODIODES, ULTRAVIOLET RADIATION, ELECTRON EMISSION, ELECTROMAGNETIC RADIATION

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE