Measurement of Spectral Density

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 81, No. 8, pp. 601–602
Abstract: The Research Institute of Sound and Picture — VÚZORT — had the goal of developing a sensitometric method, giving measurement results applicable to manufacturing control of color film and its processing technology. For this, results must not be influenced by measuring instruments, especially the densitometer. Theoretically, the best way is to use equivalent neutral densities which give a maximum of information about the measured sample. But these densities cannot be measured easily and need very expensive equipment. The scientists of the Institute came to the conclusion that the best method of fulfilling established requirements must be based on monochromatic measurements, which are comparable to the ASA standard. Monochromatic wavelengths have been chosen according to the dyes and types of materials to be measured. They fulfill the condition that when a neutral gray sample is measured equal values for all three primary wavelengths are obtained. Theoretical analysis led to the establishment of a method called SENCOMET (Sensitometric Control Method). Measured values are transferred by means of nomograms, or tables, or directly by an analog computer, into the necessary correcting steps in the processing technology. The latest type of instrument developed is the Czechoslovak Automatic Recording Color Densitometer KBD II. It is being successfully used in research institutes, motion-picture film processing laboratories and photochemical plants.
Publication Date: 1972-08-01
DOI: 10.5594/J13500
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J13500
Author(s): Miroslav JahodaResearch Institute of Sound and Picture, Praha 5 – Smíchov, Plzeňská 66, Czechoslovakia
Copyright: © 1972 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Jahoda M. , “Základy sensitometrie třívrstvových barevných kinofilmů (Basis of sensitometry of three-component color films),” Přehled fotogr. a film. techniky , 3 : 143 – 159 , 1949 . EXTERNAL
2. Jahoda M. , “Barevná sensitometrie (Color sensitometry),” Proceedings VÚZORT , 1 : 37 – 62 , 1965 . EXTERNAL
3. Stejskal L. , “La méthode d'épreuve VÚZORT dans la cinématographie en couleurs.” Congres UNIATEC , Warszawa , 1957 . EXTERNAL
4. Stejskal L. , Unifikacija cvetnych foto-materialov i kontrol cvetnogo processa . Moskva, 1959 . EXTERNAL
5. Stejskal L. , “Dosavadní výsledky užití metody SENCOMET v provozní filmové praxi (Recent results of using SENCOMET in film practice),” Proceedings of the First INTER-KAMERA Symposium, Praha, 1963 . EXTERNAL

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Miroslav Jahoda; Measurement of Spectral Density, Journal of the SMPTE ( Volume: 81, Issue: 8, August 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J13500

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Miroslav Jahoda; Measurement of Spectral Density, Journal of the SMPTE ( Volume: 81, Issue: 8, August 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J13500

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Miroslav Jahoda; Measurement of Spectral Density, Journal of the SMPTE ( Volume: 81, Issue: 8, August 1972); SMPTE, 1972. Available at https://doi.org/10.5594/J13500

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<span class="citation">Miroslav Jahoda; <cite>Measurement of Spectral Density</cite>, Journal of the SMPTE ( Volume: 81, Issue: 8, August 1972); SMPTE, 1972. Available at <a href="https://doi.org/10.5594/J13500" target="_blank" rel="noopener">https://doi.org/10.5594/J13500</a></span>

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Miroslav Jahoda; Measurement of Spectral Density, Journal of the SMPTE ( Volume: 81, Issue: 8, August 1972); SMPTE, 1972
doi: 10.5594/J13500
url: https://doi.org/10.5594/J13500

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Miroslav Jahoda; <cite id="bib-10-5594-j13500">Measurement of Spectral Density</cite>, Journal of the SMPTE ( Volume: 81, Issue: 8, August 1972); SMPTE, 1972
<span class="doi">10.5594/J13500</span>
</li>