Date of Award

12-1990

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Electrical and Computer Engineering

First Advisor

Phil Amburn, Major, USAF

Abstract

A process was developed to produce three dimensional images using computer generated holography (CGH). This process consisted of a series of steps that began with a geometric description of an object and concluded with a three dimensional holographic image being computed from a synthetic wavefront. The objects used in this series of steps (or CGH pipeline) were described geometrically as a collection of three dimensional points. The modular nature of the CGH pipeline provided a flexible platform from which to evaluate various object geometries, interference calculations algorithms, and interference pattern recording and reduction techniques. This system was implemented with general purpose computer workstations to compute the interference patterns, a postscript laser printer to record the patterns, and standard photographic reduction techniques to generate transmission holograms. Optical density filters were used to allow a hologram's virtual image to be safely viewed through the transmission hologram down the bore of the laser. The hologram's real image was observed as a collection of the object's planes captured on a white card. The reference beam was modeled as a plane wave normal to the recording surface with a constant phase angle of zero radians at all locations of the recording surface. The major constraint of this system was the limited spatial resolution of the laser printer which limited the geometric placement of the objects to be recorded.

AFIT Designator

AFIT-GCS-ENG-90D-14

DTIC Accession Number

ADA230583

Comments

The author's Vita page is omitted.

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