A Rear-Projection System for Television Composites using Low-Powered Projection Apparatus

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 81, No. 9, pp. 672–675
Abstract: The three principal techniques employed to create composite images for television are briefly described. The use of the Lumiscope Fresnel lens rear-projection system is then discussed in some detail. When this system is used, projection of material by means of conventional low-cost equipment produces excellent results. There is no tendency to “hot spot,” and the effective gain may be up to six times as great as the practical maximum with conventional rear projection. The lighting of the set is conventional with Lumiscope, and the performer can see and react to the projected material. This paper details the applications experience in selecting the Lumiscope system gain level, and limits of camera movement with various overall gain levels. The even projection field and total absence of “hot spot” are demonstrated at equivalent projection power levels from approximately 175 to 500 W (incandescent). The system tradeoffs are analyzed and summarized.
Publication Date: 1972-09-01
DOI: 10.5594/J08229
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J08229
Author(s): Norman E. CobbKNXT-TV, 6121 Sunset Blvd., Hollywood, CA 90028
Richard B. Glickman4933 Wortser Ave., Sherman Oaks, CA 91403
Copyright: © 1972 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

The Front-Projection Process of Composite Photography [Active]
Lumiscope Lens-Screen System for Color Television [Active]
Norman O. Dawn: Pioneer Worker in Special-Effects Cinematography [Active]
1. Clark Frank P. , Special Effects in Motion Pictures , Society of Motion Picture and Television Engineers, Inc. , New York , 1966 . EXTERNAL
5. Ryu Keiichiro , “RDS Lumiscope lens-screen system for color television,” presented at the World Colloquium on Theater, Television and Film Lighting of the Illuminating Engineering Society, New York, May 1971 . EXTERNAL

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Norman E. Cobb and Richard B. Glickman; A Rear-Projection System for Television Composites using Low-Powered Projection Apparatus, Journal of the SMPTE ( Volume: 81, Issue: 9, September 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J08229

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Norman E. Cobb and Richard B. Glickman; A Rear-Projection System for Television Composites using Low-Powered Projection Apparatus, Journal of the SMPTE ( Volume: 81, Issue: 9, September 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J08229

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<span class="citation">Norman E. Cobb and Richard B. Glickman; <cite>A Rear-Projection System for Television Composites using Low-Powered Projection Apparatus</cite>, Journal of the SMPTE ( Volume: 81, Issue: 9, September 1972); SMPTE, 1972. Available at <a href="https://doi.org/10.5594/J08229" target="_blank" rel="noopener">https://doi.org/10.5594/J08229</a></span>

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<li>
Norman E. Cobb and Richard B. Glickman; <cite id="bib-10-5594-j08229">A Rear-Projection System for Television Composites using Low-Powered Projection Apparatus</cite>, Journal of the SMPTE ( Volume: 81, Issue: 9, September 1972); SMPTE, 1972
<span class="doi">10.5594/J08229</span>
</li>