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Proceedings Paper

A New Wide-Angle TV Projection Lens Having Aspherical Surfaces
Author(s): Ellis Betensky
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Paper Abstract

Large rear-screen TV projection systems are typically enclosed in a large box. To reduce the volume of the box two mirror folds have been used. A new wide angle lens covering a 70-degree field has been developed which further reduces the volume, yet only requires one mirror. The design evolved from the earlier design types, having a relatively weak first group, a strong positive second group, and a negative field flattener. It is dependent upon the use of aspherical surfaces, having no analogous all-spherical type.

Paper Details

Date Published: 14 February 1986
PDF: 8 pages
Proc. SPIE 0554, 1985 International Lens Design Conference, (14 February 1986); doi: 10.1117/12.949266
Show Author Affiliations
Ellis Betensky, Opcon Associates, Inc. (United States)


Published in SPIE Proceedings Vol. 0554:
1985 International Lens Design Conference
Duncan T. Moore; William H. Taylor, Editor(s)

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