API Build-data JSON Resources
Theme

Choose how MSRBot.io looks on this device.

Auto (match system) Light mode Dark mode

Preference is stored in this browser only.

Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931)
[ACTIVE]

A Motion Picture Laboratory Sensitometer

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPE
Volume
17, No. 4, pp. 536–559
Abstract
This instrument is one giving a time scale of exposure. The exposure scale consists of 21 steps in which the exposure increases by consecutive powers of √2. The modulation of exposure time is accomplished by means of a sectored drum driven by a synchronous motor. Two standardized electric incandescent lamps are provided, one for use in exposing negative materials and one for positive materials. These are mounted in pre-positioned bases, the lamp itself being permanently set in position at the factory so that when the base is placed on its support by means of two dowel pins the filament of the lamp must lie upon the optical axis of the instrument and in register with the distance indicating scale. Standardized dyed gelatin filters are provided so that for positive materials the exposure illumination has a color temperature of approximately 3000°K., while for negative materials the color temperature is approximately 5400°K., approximately matching mean noon sunlight in quality. Electrical measuring instruments for controlling the standard lamps are an integral part of the sensitometer. Convenient guides for positioning the film to be exposed are provided as well as a roll holder for carrying a supply of raw stock. It is estimated that the probable error in exposure does not exceed ± 2.5 per cent.
Publication Date
1931-10-01
DOI
10.5594/J05570
ISSN
Print: 0097-5834
Link
https://doi.org/10.5594/J05570
Author(s)
Loyd A. JonesEastman Kodak Co., Rochester, N. Y.
Copyright
© 1931 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • 1 Mees C. E. K. Sheppard S. E. : “On Instruments for Sensitometric Investigation, with an Historical Résumé,” Phot. J. , 44 ( n. s. 28 ) ( 1904 ), p. 200 . EXTERNAL
  • 2 Nietz A. H. : “Theory of Development, Monograph No. 2 from the Kodak Research Laboratories” Eastman Kodak Company ( 1922 ). EXTERNAL
  • 3 Jones L. A. : “Photographic Sensitometry,” J. Soc. Mot. Pict. Eng. , XVII ( 1931 ), p. 491 . EXTERNAL
  • 4 Davis R. Gibson K. S. : “Artificial Sunlight for Photographic Sensitometry,” Trans. Soc. Mot. Pict. Eng. , XII ( 1928 ), p. 225 . “Filters for the Reproduction of Sunlight and Daylight and the Determination of Color Temperature,” Misc. Publ., Bur. of Standards (1931), No. 114. EXTERNAL
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J05570.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:
Loyd A. Jones; A Motion Picture Laboratory Sensitometer, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J05570
Snippet:
Loyd A. Jones; A Motion Picture Laboratory Sensitometer, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J05570

HTML (ISO 690 compliant)

Preview:
Loyd A. Jones; A Motion Picture Laboratory Sensitometer, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J05570
Snippet:
<span class="citation">Loyd A. Jones; <cite>A Motion Picture Laboratory Sensitometer</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931. Available at <a href="https://doi.org/10.5594/J05570" target="_blank" rel="noopener">https://doi.org/10.5594/J05570</a></span>

SMPTE Icon SMPTE's HTML Pub

Preview:
Loyd A. Jones; A Motion Picture Laboratory Sensitometer, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931
doi: 10.5594/J05570
url: https://doi.org/10.5594/J05570
Snippet:
<li>
Loyd A. Jones; <cite id="bib-10-5594-j05570">A Motion Picture Laboratory Sensitometer</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931
<span class="doi">10.5594/J05570</span>
</li>

Referenced By