Accession Number : AD0715983

Title :   Digital Data Recording for Human Readable Machine Readable (HRMR) Information Processor.

Descriptive Note : Technical Rept. 16 Apr-16 Jul 70,

Corporate Author : SINGER-GENERAL PRECISION INC SUNNYVALE CALIF LINK DIV

Personal Author(s) : Szabo,Nicholas S.

Report Date : NOV 1970

Pagination or Media Count : 114

Abstract : The report summarizes work performed during the first ninety days of a study contract for the system design of an information storage and retrieval system. The system is to be able to record both machine readable, as well as human readable information. The first three months of the study were devoted solely to investigating methods for recording digital information on silver halide coated film of microfiche format. In particular, the report examines two methods of recording the information: direct laser recording, using Manchester coding and recording the information in the form of a hologram. For the case of direct recording, film emulsion flaws and reading error probabilities are explored together with methods of coding the information to reduce redundancy. The holographic investigation concentrates on one-dimensional holograms derived by synthetic (computed) techniques. Several different techniques, such as detour phase, superposed gratings, and aperture distribution are examined theoretically. The report also summarizes experimental results which were obtained by synthetically computing the holographic image and recording it on the Link Image Research Laboratory flying spot scanner system. (Author)

Descriptors :   (*DATA STORAGE SYSTEMS, DESIGN), (*DIGITAL RECORDING SYSTEMS, PHOTOGRAPHY), INFORMATION RETRIEVAL, MICROFICHE, DIGITAL COMPUTERS, THIN FILM STORAGE DEVICES, FILM READERS, LASERS

Subject Categories : Computer Hardware
      Holography
      Recording and Playback Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE