Accession Number : ADD010611

Title :   Method of Bragg Angle Adjustments for Copying Holograms.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Duthie,Joseph G M ; Christensen,Charles R ; Leonard,Carl D

Report Date : 11 Oct 1983

Pagination or Media Count : 13

Abstract : A method of copying holograms wherein the process of contact copying of holographic optical elements provides a copy plate for readout at a specific wavelength different from the original wavelength. The original or master holographic element is manufactured at one established wavelength. The copying process involves contact printing using coherent illumination in actinic light at an established second wavelength, and the finished copies are to be read out at a third wavelength. The third wavelength or readout frequency lies in a range where the copy plate is not sensitive to development or recordation and is consequently excluded from routine photographic manufacture. (Author)

Descriptors :   *Patent applications, *Holograms, *Contact printers, *Holography, *Bragg angle, *Reproduction(Copying), Laser beams, Optical equipment, Diffraction, Read out techniques, Illumination, Angle of arrival, Glass, Frequency, Sensitivity, Coherence, Parts

Subject Categories : Lasers and Masers
      Holography
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE