日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
51 巻, 5 号
選択された号の論文の10件中1~10を表示しています
  • 塩沢 猛公
    1988 年 51 巻 5 号 p. 355
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
  • 中瀬 真, 伊藤 信一, 佐藤 隆, 東川 巌, 佐藤 一夫
    1988 年 51 巻 5 号 p. 357-363
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
  • 塙 良太郎, 米沢 義朗, 原口 昭, 大野 雅史, 羽田 宏
    1988 年 51 巻 5 号 p. 364-374
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
    Detailed conditions of two novel methods; “spreading method” and “adsorption method” available for preparation of the monolayer assemblies (LB films) of cyanine dyes without long alkyl chains have been examined.Õuinocyanine and thiacarbocyanine dyes capable of J-aggregate formation in aqueous solutions were incorporated into arachidic acid monolayers in the form of the J-aggregate. Importance of electrostatic interaction between negative charge at the carboxyl group of arachidic acid and positive charge at the chromophore was disclosed through careful examination of the effects of pH change and addition of Cd2+ in the water subphase, as well as the kind of matrix molecules on the J-aggregation. LB films prepared by us are promising as a model system to study physicochemical properties of the J-aggregate because of their stability for at least several days in air at room temperature.
  • 小林 範久, 西川 通則, 大野 弘幸, 土田 英俊, 廣橋 亮
    1988 年 51 巻 5 号 p. 375-380
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
    Polymeric solid electrolyte having high ionic conductivity about 10-5 S/cm is applied to construct all solid state WO3-PB based electrochromic device (ECD). Poly [oligo (oxyethylene) methacrylate]/LiClO4 hybrid thin film is prepared and sandwiched between WO3 and PB coated ITO glass electrodes in a dry argon atmosphere. The increase of the applied voltage from 1 to 3 V results in the increase of an optical density change in coloring and bleaching processes for this ECD. Optical density change is about 50% larger than that for WO3 based ECD. Furthermore, the charges can be injected 3 times more than that for WO3 based ECD. The optical density at 800nm for this ECD is proportional to the injected charges. These results suggest that PB electrode acts as effective cation supplying or accepting electrode for WO3 as well as coloring layer, because it shows opposite redox behavior against WO3. Cycling of coloring and bleaching is carried out for more than several hundred times without any decay in the activity and efficiency.
  • 中村 賢, 川崎 三津夫, 羽田 宏
    1988 年 51 巻 5 号 p. 381-387
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
    The fogging photography, which the authors have proposed as an effective method of recording the image of electric field on photographic films, is based on the desensitizing action of electric field on the process of latent image formation. The most important factor influencing the sensitivity to a given field strength is the degree of synchronization between fogging flash and applied impulse voltage. By using simple rectangular high voltage pulses it was elaborated how the variation of leading and lagging time of the fogging flash affects the film response. It was confirmed that the ionic conductivity of emulsion grains, dominating both the rate of ionic neutralization of trapped electrons and the rate of interfacial ionic polarization induced by the applied electric field, is the key parameter that governs the leading and lagging characteristics of the film response. An example of application of these characteristics to the study of surface streamers was also described.
  • 大野 信
    1988 年 51 巻 5 号 p. 388-389
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
    The progress of the development of imaging technology is noticeable. Especially the advance of of hardcopy prepared by electric signal involving visual information is magnificent. The color photography- like high quality and esthetically impressive hardcopies suitable for the new electronic photography system begin to be appeared on the market. As the result, the number of researcher and engineer on the field of imaging is increased rapidly.
    We must continue the further improvement of picture quality on silver-halide photography and take new comers into our photographic party. The typical future problems for us are to propose new imaging systems using photographic materials, to afford better understandings of the principal of photography system as an original of imaging and the usefulness of it for a norm on development of new hardcopy systems.
    The term of fine imaging shows ambiguous meanings of high definition, microscopic, high resolution characteristics on picture formation. These features are able to realize on the picture prepared by silver halide photographic materials.
    This special edition consists of four articles describing “fine imaging” of author's own under-standing. The first paper discusses the contribution of inperfect development on the single diperse AgX particles in photographic layer to the excellent tone reproduction on color photography. The second paper discusses the relation of image recording characteristics and light attenuating function of imaging materials at read-out stage. The third paper discusses the relation of digitizing schemes of input image signal to printer system and definition of output picture. The forth paper describes the fine image quality of pictorial hardcopies prepared by different TV signals. The discussion is focused on the relation of signal standard of input TV signal to printer and definition of output hardcopy picture.
  • 田中 正直
    1988 年 51 巻 5 号 p. 390-394
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
    It is analyzed that the picture quality of the silver photography is generally recognized to be superior to that of other color hard copies from the standpoint of the input/output processes of the photograph. High picture quality of the silver photography compaired with printing is owing to the continuous tone which cannot be divided macroscopically. The process from exposure to development is classified into three categories and the characteristic curves computed in each case are different. However, it is shown that the high picture quality is inherent because of a small picture element such as latent image. This character is affected by the process of development and the imperfect (partial) development contributes to improvement in quality of picture. Especially color development improves its effect. Now the development process is not controlled in view of developing latent image as it is. If we can control its process, we will get atomic level information as visible picture.
  • 三宅 洋一, Win Naing
    1988 年 51 巻 5 号 p. 395-401
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
    Image quality of photographic and quantized continuous tone images is analyzed on the basis of the sampling theorem and the information capacity. Examples of color image with different information capacities are shown and compared with the photographic pictures.
    Image quality of digital halftone images obtained by dither method is also analyzed and described.
  • 岩野 治彦
    1988 年 51 巻 5 号 p. 402-410
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
    One of the important requirements for obtaining fine images is the capability of an efficient attenuation of the imaging substance and of the image-bearing layer.
    From this viewpoint, various kinds of imaging substances, such as silver particles, dyes, pigments, vesicules, relief-forming gelatin, electrophotographic toner and carbon black powder, were investigated in view of their covering power and the attenuation coefficient of the layers in which they were incorporated.
    The results indicate that the silver halide photographic materials, both silver gelatin type and dye gelatin type, have superior attenuation coefficient on their images to those from other imaging materials. The effect of removing scattering on image density reflects on the excellent covering power of galaxy structure image.
  • ビデオハードコピーからハイビジョンハードコピーヘ
    大野 信
    1988 年 51 巻 5 号 p. 411-419
    発行日: 1988/10/28
    公開日: 2011/08/11
    ジャーナル フリー
    The novel term of “electronic image” means a picture prepared by imaging system based on electro-assisted processes of image detection, processing, recording and displaying. The photography print-like hardcopy prepared by TV (video) signal is a typical electronic image and a model of output picture for a new electronic photography system.
    The fine imaging means a procedure to form picture showing excellent image qualities of high resolution and high definition. These characteristics are related to the problem of information capacity in the picture. The information capacity of picture is determined by product of pixel number and tone reproducing function. In hardcopy, the pixel number is the primary factor.
    This 'paper describes the relation of pixel number and definition of output hardcopy. Generally in the analog signal processing, the pixel number of TV picture (frame) is determined by number of scanning lines and aspect ratio of picture. At present new TV standards of Clear-vision and HIVISION are proposed in addition to the actual NTSC standard. The pixel number of the HIVISION system is 5 times as that of the actual NTSC TV system. The image quality of hardcopy prepared by HIVISION signal (HIVISION hard-copy) is extreamely clearer than that formed by NTSC signal (video-hardcopy).
    On the hand-held size (cabinet size) HIVISION hardcopy, a pixel shows equivalent size to that determined by limited resolution of human eye on well seeing distance. Moreover the pixel numberof HIVISION hardcopy is estimated to be as that of photographic color print printed by enlargement of 24×18 mm2 size negative color film. The noise and signal ratio (S/N) on the pixel of HIVISION hard-copy is better than that of traditional color print.
    As the result, the fine imaging of video hardcopy is directly accomplished by changing of input signal standard. Furthermore, in the limited condition, the image quality of pictorial hardcopy can match up to the traditional photograpic color print.
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