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

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
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
Link: https://doi.org/10.5594/J08229
Author(s): Norman E. Cobb, Richard B. Glickman

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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>