Digital Data Recording for Human Readable Machine Readable (HRMR) Information Processor.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1970
- Accession Number
- AD0715983
Entities
People
- Nicholas S. Szabo