Optical Design And Evaluation Of Large Aspherical-Surface Plastic Lenses

Ellis I. Betensky,; Brian H. Welham

doi:10.1117/12.957875

29 November 1979 Optical Design And Evaluation Of Large Aspherical-Surface Plastic Lenses

Ellis I. Betensky,, Brian H. Welham

Proceedings Volume 0193, Optical Systems in Engineering I; (1979) https://doi.org/10.1117/12.957875
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

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.

Citation Download Citation

Ellis I. Betensky, and Brian H. Welham "Optical Design And Evaluation Of Large Aspherical-Surface Plastic Lenses", Proc. SPIE 0193, Optical Systems in Engineering I, (29 November 1979); https://doi.org/10.1117/12.957875

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