日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
42 巻, 4 号
選択された号の論文の6件中1~6を表示しています
  • 水木 栄一
    1979 年 42 巻 4 号 p. 227-245
    発行日: 1979/08/30
    公開日: 2011/08/11
    ジャーナル フリー
    A world progress report of photographic science and technology in 1978. Articles are selected from scientific reports and news items in journals and periodical publications of the world in 1978.Items are as follows: A) general view, silver halide photographic materials, color photography, electrophotography, non-silver photographic materials, B) photographic theory, image quality and color reproduction, C) photographic processing and image processing, D) applications of photography including motion picture, graphic arts and radiography, E) photographic systems including cameras and new imaging systems.
  • 光化学初期過程について
    三輪 卓司, 小泉 勝, 源田 秀三郎
    1979 年 42 巻 4 号 p. 246-256
    発行日: 1979/08/30
    公開日: 2011/08/11
    ジャーナル フリー
    In order to elucidate the photoprimary process of photochemical reaction of free radical photosensitive materials, the following investigations are made on N-phenyl-1-naphthylamine, diphenylaminetetrabromomethane, tribromomethane, dibromomethane systems by flash photolytic technique and fluoroandphosphori-metry; 1) the effect of dissolved oxygen on the fluorescence, phosphorescence and cationradical of the amine, 2) the relationship between the yield of the amine cation radical and the concentration of bromoalkane, 3) the relationship between the yield of the cation radical and the light intensity of flash, 4) the quenching effect of bromoalkane on the fluorescence of N-phenyl-l-naphthylamine, 5) etc. According to the results of these investigations, it is confirmed that the cation radicals are made by one photon process and from excited singlet species. Also it is concluded that the photoprimary process is exciplex formation between excited singlet state aromatic amine and ground state halogenated compound, charge separation in the complex and dissociation to amine cation radical and anion radical of halogenated compound.
  • 暗退色試験
    久永 輝明, 藤井 悦男, 宮川 俊夫, 石川 和夫
    1979 年 42 巻 4 号 p. 257-262
    発行日: 1979/08/30
    公開日: 2011/08/11
    ジャーナル フリー
    An accelerated test method for evaluating image stability of color photographic paper was described, and estimation of fading rate of color image was discussed.
    Yellow, magenta and cyan patches having densities of 0.5, 1.0 and 1.5 respectively were prepared, and were storaged at 50°-80°C-75% R.H. in an incubator. The degree of fading refers to the time required for say 10% change in each color density. The lifetime of image was estimated approximately by the extrapolation from Arrhenius Plot for the time taken for dye image to fade by 10% at 13°C and 75% R.H.(yearly mean in Japan).
    From the experimental results, it was clarified that the temperature above 50°C was necessary for the accelerated dark fading test, and that the relation between logarithmic fading rate and inverse temperature (1/K) showed linearity up to 80°C (353 K). The lifetime of cyan dye image having 1.0 in the initial density was estimated as 10-20 years by Arrhenius Plot.
    In the fading test, the lifetime of cyan dye image was estimated more accurately than the others, because of large temperature-dependence and less affection by yellow stain.
    Although the ANSI Standard specifies 60°C (140°F) at 70% R.H. as testing condition, higher temperature than 70°C at 75% R.H. is preferable to obtain 10% fading within 1 or 2 weeks for cyan patches prepared with today's paper products.
  • 現像銀の新しい形態 (樹枝状結晶) について
    原 浩
    1979 年 42 巻 4 号 p. 263-274
    発行日: 1979/08/30
    公開日: 2011/08/11
    ジャーナル フリー
    Some new forms of developed silver known as Dendrite were discovered in some electron micrographs, when a study of the characteristics of radiography with an electron microscope was carried out.
    The production of the dendrite, to which emulsion types of photographic films and development conditions have no relation, is affected by only the sorts and energies of nuclear radiations. The production is more frequent in the cases of radiations with higher energy and incident particles with larger mass, and the growth of dendrite begins suddenly and ceases instantaneously in the initial stage of development.
    Developed silver of dendrite form is originated from the mammoth development centers and the origination is due to the radiation damage in the silver halide crystals.
  • 客観的調子再現曲線
    犬井 正男
    1979 年 42 巻 4 号 p. 275-280
    発行日: 1979/08/30
    公開日: 2011/08/11
    ジャーナル フリー
    In the usual manner objective tone reproduction curves are obtained graphically from flare curves, photographic characteristic curves of negative films and photographic papers. The author attempted to obtain these curves calculatively by using mathematical models.
    Mathematical models for the flare curve, the photographic characteristic curves of the negative film and the photographic paper were established. After numerical analyses on parameters employed in mathematical models from experimental data, density values of prints were calculated from values of parameters by using mathematical models. Caluculated density values of prints were compared with experimental ones. Consequently it was found that good fitness was shown in highlight and midtone regions.
  • 奥山 滋
    1979 年 42 巻 4 号 p. 281-287
    発行日: 1979/08/30
    公開日: 2011/08/11
    ジャーナル フリー
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