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Proceedings Paper

Three-dimensional visualization without glasses: a large-screen autostereoscopic display
Author(s): Graham J. Martin; Alan L. Smeyne; John R. Moore; Stewart R. Lang; Neil A. Dodgson
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Paper Abstract

This paper describes Litton's time-multiplexed 3-D display technology, which allows groups of viewers to see full stereo with kineopsis (lookaround capability) without using any eye or head gear. We detail the construction of our latest 50'- screen prototype, which is brighter and has higher resolution than our 25'-prototype presented previously. The time- multiplexed concept allows the sequential projection of narrow strips of images into the viewer space and provides realistic movement parallax in a horizontal plane with full autostereoscopic images. The time-multiplexed nature allows full-screen resolution for each view and shared components for the optical trains. Our latest prototype, configured for entertainment applications, replaces our previous color sequential system with separate red, green, and blue CRTs for a brighter image [up to 120 foot-Lamberts (fL)] with much better color saturation. A new optical layout uses dichroics and beamsplitters to avoid the need for coatings with sharp cut-off frequencies, and a concave-mirror screen provides better image sharpness. We can also provide up to fifteen views in each eyebox without tube-abutment seams. Improved electronic performance provides capability of 30 frames-per- seconds interlaced at 640 by 480 pixel resolution. Special picture-shape correction circuitry has been added for a rectangular image-frame, despite a light path skewed out-of- plane.

Paper Details

Date Published: 28 August 2000
PDF: 11 pages
Proc. SPIE 4022, Cockpit Displays VII: Displays for Defense Applications, (28 August 2000); doi: 10.1117/12.397765
Show Author Affiliations
Graham J. Martin, Litton Industries, Inc. (United States)
Alan L. Smeyne, Litton Industries, Inc. (United States)
John R. Moore, JMEC Ltd. (United Kingdom)
Stewart R. Lang, ASD Systems Ltd. (United Kingdom)
Neil A. Dodgson, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 4022:
Cockpit Displays VII: Displays for Defense Applications
Darrel G. Hopper, Editor(s)

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