Accession Number : ADD016351

Title :   Interference Photocathode.

Descriptive Note : Patent, Filed 26 May 92, patented 10 May 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

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

Report Date : 10 May 1994

Pagination or Media Count : 12

Abstract : An interference photocathode includes a reflective substrate and interference layers disposed on said reflective substrate for selectively enhancing a first photoelectric yield of said photocathode when irradiated by radiation having a first wavelength relative to a second photoelectric yield of said photocathode when irradiated by radiation having a second wavelength. In one embodiment, the interference layers include a dielectric layer having a wavelength dependent effective thickness disposed on said reflective substrate such that said effective thickness for radiation having said first wavelength is an odd multiple of a quarter of said First wavelength and said effective thickness for radiation having said second wavelength is an even multiple of a quarter of said second wavelength. In another embodiment, the dielectric layer includes a layer of electrically conductive material and a dielectric material disposed between said layer of electrically conductive material and said reflective substrate.

Descriptors :   *INTERFERENCE, *PHOTOCATHODES, *PATENTS, DIELECTRICS, LAYERS, MATERIALS, RADIATION, SUBSTRATES, THICKNESS, YIELD, REFLECTIVITY, PHOTOELECTRIC EFFECT, ELECTRICAL CONDUCTIVITY, COMPOSITE MATERIALS

Subject Categories : Electrical and Electronic Equipment
      Laminates and Composite Materials
      Electricity and Magnetism
      Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE