Accession Number : AD0758057

Title :   Evaluation of Holographic Elements in a Heads-Up Display.

Descriptive Note : Final rept. 3 Apr-31 Oct 72,

Corporate Author : MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY

Personal Author(s) : Latta,John N. ; Champagne,Edwin B.

Report Date : MAR 1973

Pagination or Media Count : 44

Abstract : The report covers work on the application of a hologram optical element to a pilot's heads-up display. Two problem areas are addressed: the compensation of a wavelength shift in the hologram geometry from construction to reconstruction, and compensation of the effects of dispersion on the image in a hologram element system as a result of the spectral bandwidth of the illumination source. To examine these areas, a general vector formulation of hologram grating properties is developed. This permits the analysis of holograms recorded on either flat or curved surfaces. The wavelength shift correction of both the aberrations and first-order imaging properties of a hologram is accomplished by designing the construction geometry to offset the change in wavelength upon reconstruction. Applying these techniques to both the flat and curved surface geometries results in considerable performance improvement. (Author Modified Abstract)

Descriptors :   (*PILOTS, HELMETS), (*HELMETS, STEREOSCOPIC DISPLAY SYSTEMS), VECTOR ANALYSIS, PHOTOGRAPHY, SYSTEMS ENGINEERING, OPTICAL PROPERTIES

Subject Categories : Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE