Accession Number : AD0755620

Title :   Optimization of Thin Holographic Data Storage Systems.

Descriptive Note : Technical rept.,

Corporate Author : WASHINGTON UNIV ST LOUIS MO DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Sander,Bernard , Jr. ; Chang,William S. C. ; Snyder,Donald

Report Date : 10 JUN 1972

Pagination or Media Count : 205

Abstract : A procedure for optimization of holographic digital data storage systems is proposed and discussed. By optimization of the memory, is meant choosing the operating point of the memory either to maximize the capacity or to minimize the total read time. The operating point of the memory is defined by the number of holograms, the number of bits per page, the bias transmittance of the storage material, and the minimum beam balance ratio. The relationship of the number of holograms and the number of bits per page to the properties of the memory's components are determined. These numbers are limited in a complicated way by the minimum beam-balance ratio, which is the last parameter of the operating point to be specified. A model for the holographic process using thin holograms is proposed and analyzed. The model includes the optical diffusion, the nonlinearity of the transmittance-exposure curve, the random noise, and the diffraction-limit of the hologram aperture. (Author)

Descriptors :   (*DATA STORAGE SYSTEMS, STEREOPHOTOGRAPHY), LASERS, OPTICAL EQUIPMENT, PHOTOGRAPHIC RECORDING SYSTEMS, PHOTOGRAPHIC RECORDING MEDIA, OPTICAL PROPERTIES, PERFORMANCE(ENGINEERING)

Subject Categories : Computer Hardware
      Holography

Distribution Statement : APPROVED FOR PUBLIC RELEASE