Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 6, December 1946)

[ACTIVE]

A Processing Control Sensitometer

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 47, No. 6, pp. 474–481
Abstract: A sensitometer which gives an intensity-scale exposure has been developed as an aid to the control of photographic processing conditions. The illumination is modulated by a photographic step tablet of 21 steps in which the exposure increases by increments of . Positive films are exposed to an incandescent lamp operating at 2850 K, while with negative films, dyed gelatin filters are inserted in the optical system to approximate sunlight quality. A pendulum mechanism furnishes a 1/10-sec exposure time for positive and negative films. Where longer exposure times are needed, as, for example, with photographic papers, an additional manual shutter is provided. The instrument gives highly reproducible results for process control but is not calibrated in absolute units.
Publication Date: 1946-12-01
DOI: 10.5594/J12749
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J12749
Author(s): Gerald A. Johnson
Copyright: © 1946 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

A Motion Picture Laboratory Sensitometer [Active]
1 Mees C. E. K. : “The Theory of the Photographic Process,” Macmillan Co. ( New York ), 1942 ; Chap. XVI, p. 587 . EXTERNAL

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J12749.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

Gerald A. Johnson; A Processing Control Sensitometer, Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 6, December 1946); SMPTE, 1946. Available at https://doi.org/10.5594/J12749

Snippet:

Gerald A. Johnson; A Processing Control Sensitometer, Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 6, December 1946); SMPTE, 1946. Available at https://doi.org/10.5594/J12749

HTML (ISO 690 compliant)

Preview:

Snippet:

<span class="citation">Gerald A. Johnson; <cite>A Processing Control Sensitometer</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 6, December 1946); SMPTE, 1946. Available at <a href="https://doi.org/10.5594/J12749" target="_blank" rel="noopener">https://doi.org/10.5594/J12749</a></span>

SMPTE's HTML Pub

Preview:

Gerald A. Johnson; A Processing Control Sensitometer, Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 6, December 1946); SMPTE, 1946
doi: 10.5594/J12749
url: https://doi.org/10.5594/J12749

Snippet:

<li>
Gerald A. Johnson; <cite id="bib-10-5594-j12749">A Processing Control Sensitometer</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 47, Issue: 6, December 1946); SMPTE, 1946
<span class="doi">10.5594/J12749</span>
</li>