Journal of The Society of Photographic Science and Technology of Japan
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
Volume 41, Issue 1
Displaying 1-9 of 9 articles from this issue
  • Masayoshi TSUBOI
    1978 Volume 41 Issue 1 Pages 5-13
    Published: February 20, 1978
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    The photographic materials on non-silver complex compound are reviewed. Cuprous and cupric complex, organo-tellurium compound and cobalt (111) complex are selected, and their chemical and photographic properties are discussed. In some cases, reaction mecanism for development of the materials is assumed.
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  • The Observation of the Bleaching Process of Developed Silver
    Syunji MATSUO
    1978 Volume 41 Issue 1 Pages 14-20
    Published: February 20, 1978
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    Microscopic observation was carried out on bleaching process of developed silver. Filamentary silver, especially formed at short time development, was bleached rapidly, while massive silver remained almost unbleached.
    In ordinary bleaching solution, filamentary developed silver, covered in thin gelatine layer, was rapidly bleached.
    The rate of bleaching of silver plate was, however, very slow over 0.3 hr. to 20 hr., whereas the rate of bleach-fixing was fast.
    Consequently, it seems the rate of bleaching of silver is virtually fast, but it is influenced by the silver halide formed on silver, the diffusing rate of bleaching agents in gelatine layer and, may be, by inhibiting materials on developed silver surface.
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  • Koichi CHATANI, Isamu SHIMIZU, Eiichi INOUE
    1978 Volume 41 Issue 1 Pages 21-27
    Published: February 20, 1978
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    The lateral diffusion of the Ag deped in the chalcogenide glasses (AS2S3, AS2Se3) was studied, relating with the inherent resolving power of the Ag-chalcogenide sensors.
    During the photodoping of Ag into the chalcogenide glass, vertical diffusion was smeared simultaniously the boundary zone between the Ag doped area and the undoped one due to the lateral diffusion of Ag. The lateral diffusion began to proceed rapidly when the chalcogenide layer was saturated with Ag doped. The lateral diffusion was measured spectrophotometrically by using a microspectrophotometer.
    Thermal diffusion depended greatly on the chemical composition of the glasses and was conspicuously observable in the glasses consisting of Se or Te at room temperature. The images formed on AS2S3 glass were stable, since the thermal diffusion of Ag in the glass was negligible small.
    MTF (Modulation Transfer Function) curves were obtained an Ag-AS2S3 sensor in various amount of Ag doped in the glass. It was confirmed from the MTF that the sensor could kept inherently high resolving power, though the lateral diffusion caused the degradation of resolution as a large amount of Ag was doped.
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  • Considerations on Necessity of Flattery Index and Specification of Color Charts intended to use for Evaluation Method
    Souichi KUBO, Takashi SUEMITSU
    1978 Volume 41 Issue 1 Pages 28-33
    Published: February 20, 1978
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    The numerical values which specify the suitability of fluorescent lamps as a light source of taking color photographs were obtained by the experimental evaluation method which was described in the previous paper.
    In this paper, the authors examined the rationalization of the values by a view point of practical use of the light sources in photographing colored objects.
    The suitability factor calculated by the mathematical formula modified by the authors showed high correlations to the result of practical use of light sources. Additionally, it was found that the flattery indices, for individual object colors which recognized as important in color photography, have to be introduced in the evaluation method.
    As the discrepancies on the metamerism between the human visual system and the color photographic system play significant role in use of the color charts, the consideration on spectral characteristics has to be given to specifing the characteristics of the charts intended to be used in the evaluation method.
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  • Hiroshi KOKADO
    1978 Volume 41 Issue 1 Pages 34-41
    Published: February 20, 1978
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    Exposure characteristics of photochemical and photoconductive-memory based photographic systems were analysed, on an assumption of the first or pseudo-first order kinetics. The concept of “reduced characteristic curve” was introduced, which was defined with dimensionless parameters to describe the general behavior of the image or latent image formation. Calculated curves for the diazo-film, the electrolytic electrophotography and the RS film well fitted to experimental observations.
    The recording speed and the gradation were discussed on the basis of the above treatment. It was concluded that in ZnO-resin layers, the electron density in the latent image decays bimolecularly in the course of the development, and this contributes to improve the gradation.
    A definition of the effective recording speed was proposed, which makes it possible to compare the speed with the ASA scale of silver halide processes.
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  • Yasushi OHYAMA
    1978 Volume 41 Issue 1 Pages 42-59
    Published: February 20, 1978
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    The author has theorecically derived the following general formula describing the relation between transmission densities and reflection densities of a photographic image layer;
    R=(1-Ra)RbTa/1-RaRbTA+ST
    where R and T are respectively reflectance and transmittance of the layer and ST is the total light scatter at the image layer of a reflection print. Also Ra is internal reflection at the surface of the image layer, and Rb is reflectance of the base layer or the support. Usually Rb is 1.00 when the support has a white diffuse reflective coating (i.e., baryta or titanium oxide) and theoretically Ra is 0.614 when the image layer consists of gelatin or similar binders and the surface is completely flat and smooth, and A is theoretically 2.13 when reflection densities are measured by a 45°-90° densitometer.
    Actually, however, in author's experiments where strips of a reversal color film and some sorts of black and white (silver image) films are, after exposing, processing and transmission-density-measurement, pasted on to a piece of baryta paper, making the surface of the image layer in optical contact with the baryta coating, and the reflection densities are measured by a “Macbeth” densitometer, A is usually lower than 2.13, e.g. 2.10-1.99, and in an exceptional case of D.T.R. prints the values are further lower, e.g. 1.76 (nega.) and 1.61 (posi.), and Ra is also usually lower than the theoretical value of 0.614, e.g. 0.52 for a color print and 0.47-0.34 for silver images, and the values are the lower for the coarser grains. This means that the internal reflection of the image layer becomes lower if the layer contains light scattering substances in it.
    The higher density part of a reflection print is practically limited by incident-light-scattering property at the image layer, total value of which is ST and consists of outer-surface scatter (SS) and inner-layer scatter (SI). Finally maximum reflection density (max. DR) is defined as-logST.
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  • Teruji OSE
    1978 Volume 41 Issue 1 Pages 60-68
    Published: February 20, 1978
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1978 Volume 41 Issue 1 Pages 69-70
    Published: February 20, 1978
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    Download PDF (222K)
  • 1978 Volume 41 Issue 1 Pages 78-85
    Published: February 20, 1978
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
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