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Proceedings Paper

Membrane-mirror-based display for viewing 2D and 3D images
Author(s): Stuart McKay; Steven Mason; Leslie S. Mair; Peter Waddell; Simon M. Fraser
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Paper Abstract

Stretchable Membrane Mirrors (SMMs) have been developed at the University of Strathclyde as a cheap, lightweight and variable focal length alternative to conventional fixed- curvature glass based optics. A SMM uses a thin sheet of aluminized polyester film which is stretched over a specially shaped frame, forming an airtight cavity behind the membrane. Removal of air from that cavity causes the resulting air pressure difference to force the membrane back into a concave shape. Controlling the pressure difference acting over the membrane now controls the curvature or f/No. of the mirror. Mirrors from 0.15-m to 1.2-m in diameter have been constructed at the University of Strathclyde. The use of lenses and mirrors to project real images in space is perhaps one of the simplest forms of 3D display. When using conventional optics however, there are severe financial restrictions on what size of image forming element may be used, hence the appeal of a SMM. The mirrors have been used both as image forming elements and directional screens in volumetric, stereoscopic and large format simulator displays. It was found that the use of these specular reflecting surfaces greatly enhances the perceived image quality of the resulting magnified display.

Paper Details

Date Published: 20 May 1999
PDF: 12 pages
Proc. SPIE 3634, Projection Displays V, (20 May 1999);
Show Author Affiliations
Stuart McKay, Univ. of Strathclyde (United Kingdom)
Steven Mason, Univ. of Strathclyde (United Kingdom)
Leslie S. Mair, Caledonian Univ. (United Kingdom)
Peter Waddell, Univ. of Strathclyde (United Kingdom)
Simon M. Fraser, Univ. of Strathclyde (United Kingdom)

Published in SPIE Proceedings Vol. 3634:
Projection Displays V
Ming Hsien Wu, Editor(s)

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