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Journal of the SMPTE ( Volume: 80, Issue: 6, June 1971)
[ACTIVE]

A Wide Dynamic Range Photometer for Film Densitometry

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPTE
Volume
80, No. 6, pp. 481–485
Abstract
A wide dynamic range photometer has been designed with a photomultiplier operated at constant anode current by means of a feedback circuit. The output of the photometer is accurately proportional to the logarithm of light intensity over a range as great as eight decades. The internal feedback loop is stable, with a unity-gain bandwidth up to 100 kHz, depending on the photomultiplier type and anode current. Day-long stability is better than 1% or 0.004 log units. The photometer is being used in a photographic film scanning microdensitometer.
Publication Date
1971-06-01
DOI
10.5594/J05788
ISSN
Print: 0361-4573
Link
https://doi.org/10.5594/J05788
Author(s)
David G. KocherOptical Measurements, Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, MA 02173
Copyright
© 1971 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • 1. Sweet M. H. , Electronics , Nov. 1946 , p. 105 . EXTERNAL
  • 2. Sweet M. H. , Phot. Sci. Eng. , 3 : 97 ( 1959 ). EXTERNAL
  • 3. Gunderson N. R. , U. S. Pal. 2,454,871. . EXTERNAL
  • 4. Bode H. W. , Network Analysis and Feedback Amplifier Design , D. van Nostrand Company , Princeton, N.J. , 1945 . EXTERNAL
  • 5. Roberts S. , Rev. Sci. Inst. , 10 : 181 ( 1939 ). EXTERNAL
  • 6. Farmer F. T. , Brit. J. Rad. , XIX : 27 ( 1946 ). EXTERNAL
  • 7. Philbrick/Nexus Research , Dedham, Mass. EXTERNAL
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David G. Kocher; A Wide Dynamic Range Photometer for Film Densitometry, Journal of the SMPTE ( Volume: 80, Issue: 6, June 1971); SMPTE, 1971. Available at https://doi.org/10.5594/J05788
Snippet:
David G. Kocher; A Wide Dynamic Range Photometer for Film Densitometry, Journal of the SMPTE ( Volume: 80, Issue: 6, June 1971); SMPTE, 1971. Available at https://doi.org/10.5594/J05788

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David G. Kocher; A Wide Dynamic Range Photometer for Film Densitometry, Journal of the SMPTE ( Volume: 80, Issue: 6, June 1971); SMPTE, 1971. Available at https://doi.org/10.5594/J05788
Snippet:
<span class="citation">David G. Kocher; <cite>A Wide Dynamic Range Photometer for Film Densitometry</cite>, Journal of the SMPTE ( Volume: 80, Issue: 6, June 1971); SMPTE, 1971. Available at <a href="https://doi.org/10.5594/J05788" target="_blank" rel="noopener">https://doi.org/10.5594/J05788</a></span>

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Preview:
David G. Kocher; A Wide Dynamic Range Photometer for Film Densitometry, Journal of the SMPTE ( Volume: 80, Issue: 6, June 1971); SMPTE, 1971
doi: 10.5594/J05788
url: https://doi.org/10.5594/J05788
Snippet:
<li>
David G. Kocher; <cite id="bib-10-5594-j05788">A Wide Dynamic Range Photometer for Film Densitometry</cite>, Journal of the SMPTE ( Volume: 80, Issue: 6, June 1971); SMPTE, 1971
<span class="doi">10.5594/J05788</span>
</li>