Deformographic Storage Display Tube (DSDT) Application for Real-Time Map Annotation.
Abstract
The report describes the investigation into the feasibility of using the Deformographic Storage Display Tube (DSDT) as a real-time annotation device for an airborne moving map projection system. The DSDT is a light valve display device which uses a Schlieren optical projection system to create a visual image from minute deformation on a dielectric membrane material within the tube. The basic problem with real-time annotation systems for airborne moving map units has been the difficulty of attaining light output and contrast from the annotation device sufficient to create visible imagery against the high light background created by the map projection light and the reflected ambient sunlight in the cockpit. The DSDT has the inherent capability to provide high contrast, high brightness imagery; and, because it uses an optical system as a part of its image forming phenomenon, it can be readily integrated with a map projection unit. This study was primarily a laboratory investigation aimed at demonstrating the feasibility of the approach described above. The results of the investigation were favorable. Map annotation derived from the DSDT was visible against a background consisting of a 4300 fL map brightness and the reflected screen brightness from a 10,000 fc incident ambient light. Use of the DSDT could extend the use of the map projection surface for other aircraft display functions, thus creating a favorable cost effectiveness tradeoff for the additional equipment. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1973
- Accession Number
- AD0786234
Entities
People
- B. James Ross
- Gunnar Nielsen
- Harold H. Bloem
Organizations
- International Business Machines Corporation (Armonk, NY)