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Journal of the SMPTE ( Volume: 76, Issue: 1, January 1967)
[ACTIVE]

Dichroic Safelights

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Volume
76, No. 1, pp. 15–17
Abstract
The majority of laboratories handling color positive films use a filter in their printing and processing areas which has a bandwidth that overlaps areas of high emulsion sensitivity; therefore, the light intensity must be kept low. Some laboratories have tried sodium vapor lamps, with filters to absorb unwanted side radiation. These provide high-intensity monochromatic light at wavelengths where the film has low light sensitivity. Unfortunately, this type of lamp has a high initial cost and a relatively high maintenance cost, making it impractical. A special fixture using a dichroic filter and a prefocused lamp has been designed. The output of this lamp successfully matches the filtered sodium vapor lamp and provides the illumination in a more efficient method requiring lower initial cost and considerably lower maintenance expense.
Publication Date
1967-01-01
DOI
10.5594/J09206
ISSN
Print: 0361-4573
Link
https://doi.org/10.5594/J09206
Author(s)
David J. DegenkolbDeLuxe Laboratories, Inc., General Film Laboratories Div., 1546 N. Argyle Ave., Hollywood, Calif. 90028
Jack P. HallDeLuxe Laboratories, Inc., General Film Laboratories Div., 1546 N. Argyle Ave., Hollywood, Calif. 90028
Copyright
© 1967 Society of Motion Picture and Television Engineers, Inc.
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David J. Degenkolb and Jack P. Hall; Dichroic Safelights, Journal of the SMPTE ( Volume: 76, Issue: 1, January 1967); SMPTE, 1967. Available at https://doi.org/10.5594/J09206
Snippet:
David J. Degenkolb and Jack P. Hall; Dichroic Safelights, Journal of the SMPTE ( Volume: 76, Issue: 1, January 1967); SMPTE, 1967. Available at https://doi.org/10.5594/J09206

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David J. Degenkolb and Jack P. Hall; Dichroic Safelights, Journal of the SMPTE ( Volume: 76, Issue: 1, January 1967); SMPTE, 1967. Available at https://doi.org/10.5594/J09206
Snippet:
<span class="citation">David J. Degenkolb and Jack P. Hall; <cite>Dichroic Safelights</cite>, Journal of the SMPTE ( Volume: 76, Issue: 1, January 1967); SMPTE, 1967. Available at <a href="https://doi.org/10.5594/J09206" target="_blank" rel="noopener">https://doi.org/10.5594/J09206</a></span>

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Preview:
David J. Degenkolb and Jack P. Hall; Dichroic Safelights, Journal of the SMPTE ( Volume: 76, Issue: 1, January 1967); SMPTE, 1967
doi: 10.5594/J09206
url: https://doi.org/10.5594/J09206
Snippet:
<li>
David J. Degenkolb and Jack P. Hall; <cite id="bib-10-5594-j09206">Dichroic Safelights</cite>, Journal of the SMPTE ( Volume: 76, Issue: 1, January 1967); SMPTE, 1967
<span class="doi">10.5594/J09206</span>
</li>

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