Accession Number : AD0820552

Title :   ELECTRO-OPTIC TECHNIQUES AND PHENOMENA.

Descriptive Note : Final rept.,

Corporate Author : SPERRY RAND CORP ST PAUL MN UNIVAC FEDERAL SYSTEMS DIV

Personal Author(s) : Hart, U. L.

Report Date : SEP 1967

Pagination or Media Count : 142

Abstract : An investigation has been carried out for the purpose of evaluating materials and techniques for use in a high capacity optical memory. During the past year, emphasis has been placed on the evaluation of materials which were available or readily synthesized. The materials selected were among those which appeared to have promising photochromic properties on the basis of information available in the literature and previous experience in our laboratory. The materials chosen for intensive study were those which were either known or reported to be photo-reversible. The properties which were evaluated were those on which information must be obtained if a material is to be used in an optical memory: color change or contrast, reversibility of the changes, wavelengths causing changes between the two states, energy requirements for causing the changes, stability of the two states, and resistance to fatigue. The evaluation which was carried out does not necessarily cover these properties in the order of importance nor are all of these properties equally significant for any particular memory. Because various memories make different demands on the memory elements, it is to be expected that the ideal properties for one type of memory will not necessarily be optimal or even desirable for another type of memory.

Descriptors :   *OPTICAL GLASS), (*ELECTROOPTICS, DATA STORAGE SYSTEMS), (*PHOTOCHROMISM, HALOGENATED HYDROCARBONS, OXIDES, COLORS, SILVER COMPOUNDS, HALIDES, ALKENES, X RAY DIFFRACTION, ABSORPTION SPECTRA, DIGITAL SYSTEMS.

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE