Accession Number : ADD004278

Title :   Method for Holographic Storage.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Schneider,Irwin

Report Date : 26 Jul 1977

Pagination or Media Count : 6

Abstract : A method of improving the holographic storage of data by yielding brighter holograms with higher densities which comprises recording an interferogram of an object wave and a reference wave into a holographically recordable medium consisting of an ionic crystal initially with a random distribution of anisotropic centers, and mutually off-set at an angle of at least arc sin 10lambda/d wherein d is the crystal thickness and lambda the wavelength of the coherent source; and then consecutively exposing the crystal to the object wave and the reference wave, each with a Pi/2 rotation in the plane of polarization but without any change in light intensity, wavelength, or crystal temperature.

Descriptors :   *Patents, *Data storage systems, *Memory devices, Holography, Holograms, Interferometry, Crystals, Color centers, Alkali metal compounds, Halides

Subject Categories : Computer Hardware
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE