Method and apparatus for elimination of distortion in rear proje

Details Method and apparatus for elimination of distortion in rear proje Method and apparatus for elimination of distortion in rear proje

1997-07-07

1999-01-26

Epps, Georgia

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359637, G02B 2714

Patent

active

058644318

ABSTRACT:
A display system employs rear projection to a curved, translucent display or image screen. A lens between the projecting device and the display screen eliminates or reduces distortion by altering a convergence of the projected image, transforming the projected image from diverging to converging for a convex rear projection screen surface or further diverging the image for a concave rear projection screen surface. A lightweight and economical Fresnel lens may be employed for this purpose.

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patent: 4743200 (1988-05-01), Welch et al.
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patent: 5572229 (1996-11-01), Fisher
patent: 5572363 (1996-11-01), Fergason
patent: 5695406 (1997-12-01), Park
"The Flostation" circular, Flogiston Corporation, date unknown.

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