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Auto-stereoscopic double lens raster display with tracked projectors

: Borner, R.

FKT 51 (1997), No.5, pp.249-250, 252-255
ISSN: 1430-9947
ISSN: 0015-0142
Journal Article
Fraunhofer HHI ()
cathode-ray tube displays; lenses; optical projectors; optical testing; three-dimensional displays; autostereoscopic double lens raster display; tracked projectors; heinrich hertz institute; display screens; double lens raster screen; stereoscopic image viewing; contrast enhancement; diffusor layer; transparency/measuring projector; x/z head tracking system; diffusor; scattering indicator; line function; crt screen crosssections; polar diagrams; light outburst density; optical measurements; stereo projectors; observer movement compensation

The article describes work at the Heinrich Hertz Institute on display screens for spectacle-less stereo viewing and gives a general explanation of stereoscopic image viewing. It paper deals with the design and construction of a double lens raster screen with contrast enhancement and an internal diffusor layer, with construction of a transparency/measuring projector and the development of an X/Z head tracking system to monitor and compensate for movement of the observer's head. Diagrams are presented of double lens display screen systems and the following parameters are tabulated: diffusor, scattering-indicator and line function. The CRT screen cross-sections are shown and polar diagrams of light outburst density are presented. The results of optical measurements are tabulated. This leads to a description of complete stereo projectors, with facilities for compensating for observer movement.