Low Cost, Wide Angle Infinity Optics Visual System.
Abstract
Holographic beamsplitter spherical mirrors have been introduced in the Pancake Window visual simulators as a low-cost and low-weight substitute for the classical glass beamsplitter spherical mirrors. The goal of this project was the production of a three-channel visual simulator consisting of a mosaic of three holographic Pancake Windows in which these beamsplitter spherical mirrors are used. The field of view of the complete display is 45 deg vertical and 140 deg horizontal and will be used to demonstrate a dynamic, unprogrammed visual simulation imagery generated by T.V. camera/model and gantry image generator. Prior to the production of the holograms, holographic research was carried out to investigate and resolve problems which have affected the quality and the repeatability of the final product. Specific attention was given to holographic ghost images which seriously impaired the contrast and the resolution of the images produced by the holographic Pancake Window and to the effects of environmental controls. The final production of the holographic beamsplitter was delayed by a stability problem in the wet cell used to support the holographic plate during the holographic exposure. The phosphors in the CRT displays were originally designed to be P-44 narrow band phosphors but were later changed to a wide-band emission phosphor. The reason for this was a wavelength peak response shift of the holograms with large field-of-view angles. The use of a wide-band phosphor, although it penalized the transmission of the holographic Pancake Window, required less stringent wavelength peak location in the manufacture of these holographic beamsplitter mirrors.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1981
- Accession Number
- ADA105508
Entities
People
- Daniel J. Coleman
- Jose R. Magarinos
- Ted Lenczowski