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Proceedings Paper

Optical Design And Evaluation Of Large Aspherical-Surface Plastic Lenses
Author(s): Ellis I. Betensky,; Brian H. Welham
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Paper Abstract

Over the last several years there has been a growing consumer interest in Large Screen Television; large screen being defined as a 45 inch to 96 inch diagonal image. Present technology accomplishes this size imagery by using a lens to project a CRT image onto a viewing screen. Systems being manufactured today consist of front or rear screens, one or more CRT's and one or more lenses. The primary performance requirement most difficult to achieve economically is sufficient light output to permit comfortable viewing with a high ambient light level. This requirement, in conjunction with maintaining image quality, a reasonable configuration and low cost, established the need for inexpensive large aperture lenses. Several types of all-plastic objectives and large plastic Schmidt correctors are presently in production at U. S. Precision Lens to meet this growing requirement. The following discussion describes the optical design of the large refracting systems and some of the difficulties associated with these designs.

Paper Details

Date Published: 29 November 1979
PDF: 14 pages
Proc. SPIE 0193, Optical Systems in Engineering I, (29 November 1979); doi: 10.1117/12.957875
Show Author Affiliations
Ellis I. Betensky,, Opcon Consultants (Israel)
Brian H. Welham, U. S. Precision Lens, Inc. (United States)

Published in SPIE Proceedings Vol. 0193:
Optical Systems in Engineering I
Paul R. Yoder, Editor(s)

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