Development of a large-screen high-definition laser video projection system

Tony J. Clynick

doi:10.1117/12.45419

1 August 1991 Development of a large-screen high-definition laser video projection system

Tony J. Clynick

Proceedings Volume 1456, Large Screen Projection, Avionic, and Helmet-Mounted Displays; (1991) https://doi.org/10.1117/12.45419
Event: Electronic Imaging '91, 1991, San Jose, CA, United States

Abstract

A prototype laser video projector which uses electronic, optical, and mechanical means to project a television picture is described. With the primary goal of commercial viability, the price/performance ratio of the chosen means is critical. The fundamental requirement has been to achieve high brightness, high definition images of at least movie-theater size, at a cost comparable with other existing large-screen video projection technologies, while having the opportunity of developing and exploiting the unique properties of the laser projected image, such as its infinite depth-of-field. Two argon lasers are used in combination with a dye laser to achieve a range of colors which, despite not being identical to those of a CRT, prove to be subjectively acceptable. Acousto-optic modulation in combination with a rotary polygon scanner, digital video line stores, novel specialized electro-optics, and a galvanometric frame scanner form the basis of the projection technique achieving a 30 MHz video bandwidth, high- definition scan rates (1125/60 and 1250/50), high contrast ratio, and good optical efficiency. Auditorium projection of HDTV pictures wider than 20 meters are possible. Applications including 360 degree(s) projection and 3-D video provide further scope for exploitation of the HD laser video projector.

Citation Download Citation

Tony J. Clynick "Development of a large-screen high-definition laser video projection system", Proc. SPIE 1456, Large Screen Projection, Avionic, and Helmet-Mounted Displays, (1 August 1991); https://doi.org/10.1117/12.45419

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