Journal of The Society of Photographic Science and Technology of Japan
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
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Volume 35, Issue 2
Displaying 1-6 of 6 articles from this issue
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  • College Education on Photographic and Science and Engineering
    Haruo IRIE
    1972 Volume 35 Issue 2 Pages 71-82
    Published: March 31, 1972
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.35.71
    JOURNAL FREE ACCESS
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  • Spectral Sensitization of Photoconduction in CdS Powder by Cyanine Dyes (III)
    Hisashi NAKATSUI, Yasushi HISHIKI
    1972 Volume 35 Issue 2 Pages 83-89
    Published: March 31, 1972
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.35.83
    JOURNAL FREE ACCESS
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    The Photoconductivity processes in both the fundamental absorption region and the spectral sensitization regions of cadmium sulfide are discussed. Spectrally sensitized cadmium sulfide was obtained by adding styryl type cyanine dye to cadmium sulfide powder.
    The experimental results of the photocurrent versus wave length or light intensity showed that the dye became a recombination center as well as a sensitized center.
    The photoconductivity of pure cadmium sulfide has been larger than those of all sensitized cadmium sulfides. Sensitized cadmium salfide has a larger photoconductivity in the f undamental absorption band than in the spectral sensitized absorption band.
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  • Phosphorescence and Excitation Spectra of Cinnamic Acid
    Minoru TSUDA, Setsuko OIKAWA, Ryoichi MIYAKE
    1972 Volume 35 Issue 2 Pages 90-93
    Published: March 31, 1972
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.35.90
    JOURNAL FREE ACCESS
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    Experimental studies were carried out in order to obtain the true phosphorescence and excitation spectra of cinnamic acid. The phosphorescence spectrum measured at 77°K has three peaks, 19600, 18300 and 16950 cm-1, having intervals of 1350 cm-1. The value is very near to the intervals of 1500 cm-1 obtained in the S-T absorption spectrum at room temperature. The excitation spectrum is consistent with the absorption spectrum of the same concentration. The fact means that quantum yield of the phosphorescence of cinnamic acid does not depend on the wave length of excitation light.
    An experimental device using a vacuum thermocouple was made in order to measure the number of photon of monochromatic light. The measurement using the device has a good reproducibility, compared with a quantum counter using standard fluorescent materials in which a trace of impurities disturbs the reproducibility.
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  • Photodecomposition of Aromatic Carbonylazide. III
    Sensitized Photodecomposition
    Mitsunori SUKIGARA, Yoshimi ITO, Kenichi HONDA, Shinichi KIKUCHI
    1972 Volume 35 Issue 2 Pages 94-97
    Published: March 31, 1972
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.35.94
    JOURNAL FREE ACCESS
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    Sensitized photodecomposition of benzoylazide by benzophenone and acetophenone was studied. When benzophenone was used as the sensitizer, the apparent quantum yields of the decomposition of benzoylazide in an isopropanol solution and an ethanol solution were 12.6 and 6.0, respectively. The reaction products were benzamide, acetone, and a small amount of benzpinacol in an isopropanol solution. Measurements of the phosphorescence spectra suggested that the triplet energy transfer from the sensitizer to benzoylazide did not occur. Radical chain reaction initiated by the hydrogen abstraction from a solvent molecule by a triplet state sensitizer would be the most reasonable mechanism of the sensitized photoreaction.
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  • Penetration of Photographic Chemicals into Gelatin Layers (IV)
    Comparison of Penetration Rates of Reacting Species
    Haruhiko IWANO
    1972 Volume 35 Issue 2 Pages 98-104
    Published: March 31, 1972
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.35.98
    JOURNAL FREE ACCESS
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    Competitive penetration of two reacting species from solution into emulsion layers at a stage of photographic processing was studied by several methods reported previously.
    In the case of formalin-sulfate prehardener for the process of coupler-in-developer type, penetration of OH- determined the progress in depth of harden0ed layer, because it penetrated slower than HCHO. The rate of diffusion-controlled development was generally more dependent on penetration rate of developing materials rather than that of 0H-. The rates of diffusion of couplers and other ingredients in processing solution were also determined.
    The factors involved in diffusion-controlled process in photographic processing were discussed from the results.
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  • [title in Japanese]
    Shingo OHUE
    1972 Volume 35 Issue 2 Pages 105-112
    Published: March 31, 1972
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.35.105
    JOURNAL FREE ACCESS
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