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Journal of the SMPTE ( Volume: 79, Issue: 2, February 1970)
[ACTIVE]

A Three-Element Projector Condensing System

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPTE
Volume
79, No. 2, pp. 85–87
Abstract
The design of an efficient optical condensing system is difficult to achieve, since a high aperture must be provided at the source, while an enlarged image of the source is required at the entrance pupil of the projection lens. The system outlined consists of three basic elements, together with a series of supplementary lenses to accommodate a range of projection lenses from 35 to 300 mm. Besides the requirement for high initial aperture, two additional goals were set: correction for the cosine falloff at the source; and compatibility with all projection lenses in a specified range of f-numbers. These two latter objectives were attained using a field flatness of 10% and an f/2.5 lens which received 90% of the flux at its entrance pupil. These conditions are based on a 50 ° acceptance angle at the filament of a 1200-W incandescent projection lamp.
Publication Date
1970-02-01
DOI
10.5594/J10734
ISSN
Print: 0361-4573
Link
https://doi.org/10.5594/J10734
Author(s)
Chan StreetStreet Laboratory and Industries, 139 Nevada St., El Segundo, CA 90245.
Copyright
© 1970 Society of Motion Picture and Television Engineers, Inc.
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Chan Street; A Three-Element Projector Condensing System, Journal of the SMPTE ( Volume: 79, Issue: 2, February 1970); SMPTE, 1970. Available at https://doi.org/10.5594/J10734
Snippet:
Chan Street; A Three-Element Projector Condensing System, Journal of the SMPTE ( Volume: 79, Issue: 2, February 1970); SMPTE, 1970. Available at https://doi.org/10.5594/J10734

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Chan Street; A Three-Element Projector Condensing System, Journal of the SMPTE ( Volume: 79, Issue: 2, February 1970); SMPTE, 1970. Available at https://doi.org/10.5594/J10734
Snippet:
<span class="citation">Chan Street; <cite>A Three-Element Projector Condensing System</cite>, Journal of the SMPTE ( Volume: 79, Issue: 2, February 1970); SMPTE, 1970. Available at <a href="https://doi.org/10.5594/J10734" target="_blank" rel="noopener">https://doi.org/10.5594/J10734</a></span>

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Preview:
Chan Street; A Three-Element Projector Condensing System, Journal of the SMPTE ( Volume: 79, Issue: 2, February 1970); SMPTE, 1970
doi: 10.5594/J10734
url: https://doi.org/10.5594/J10734
Snippet:
<li>
Chan Street; <cite id="bib-10-5594-j10734">A Three-Element Projector Condensing System</cite>, Journal of the SMPTE ( Volume: 79, Issue: 2, February 1970); SMPTE, 1970
<span class="doi">10.5594/J10734</span>
</li>

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