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Volume 70, Issue 6
Displaying 1-5 of 5 articles from this issue
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I. Spectral Sensitization, Part 2. Sensitizing Dyes after the 1930'sYasushi OISHI2007 Volume 70 Issue 6 Pages 334-347
Published: December 25, 2007
Released on J-STAGE: February 17, 2011
JOURNAL FREE ACCESSA historical review of synthesis of the new spectral sensitizers after the 1930's and of their impacts on the quality of photographic materials and on the industry.View full abstractDownload PDF (2317K) -
Yukio OKANO, Masaya OITA, Yutaka TAKAHASHI, Yasuo MASAKI2007 Volume 70 Issue 6 Pages 348-353
Published: December 25, 2007
Released on J-STAGE: February 17, 2011
JOURNAL FREE ACCESSThe RAW image files of color digital cameras are produced by direct analog to digital converting from the Bayer filtered imaging devices. The Bayer-RAW images are not affected by the digital image processing of the camera system, so the MTF of optical system can be calculated from Bayer-RAW images. The MTFs for three colors (Red, Green, Blue) of an optical system for digital still camera which output the RAW images are calculated from slanted black/white edges. The MTFs for green color are calculated from slanted images interpolated 1-dimensionally. The MTFs for red color and blue color are derived from re-sampled slant edges of filtered images. The white light MTFs are also calculated by white balanced Bayer-RAW images.View full abstractDownload PDF (2890K) -
Proposal of a Method to Arrange Many Samples Systematically on a SheetNaokazu AOKI, Daisuke SATO, Mari YAMAMOTO, Hiroyuki KOBAYASHI2007 Volume 70 Issue 6 Pages 354-357
Published: December 25, 2007
Released on J-STAGE: August 04, 2011
JOURNAL FREE ACCESSIn color subjective evaluation experiments, presentation of samples for evaluation, which were arranged systematically in color, result in advantage to evaluate a large number of samples without stress. In the previous paper, we proposed the systematic arrangement method that several tens card-sized pictures, whose color were systematically changed chromaticity in the a-b plane, were arranged on board, and this method resulted in enormous reduction of evaluation time without significant differences in the results of the analysis, compared with the usual successive categories method. However, when the L factor were included and multiple sheets were used, the data among the samples arranged on another board for each L was required correction.
In the present paper, new presentation method were proposed, which samples with L, a, b three-dimensional factors were arranged systematically on one sheet, and were showed good approximation and accuracy in comparison with the method that each of samples was presented randomly.View full abstractDownload PDF (3697K) -
Mitsutoshi OKANO, Yoshinao SATOH2007 Volume 70 Issue 6 Pages 358-363
Published: December 25, 2007
Released on J-STAGE: February 17, 2011
JOURNAL FREE ACCESSExamination of 5 polygermanes with different substituent groups showed for the first time that polygermane (a typical aconjugated polymer) films can be obtained by means of vacuum deposition. Weight average molecular weight (Mw) of the deposited polygermane was determined to be typically 1000 by gel permeation chromatography using polystyrene standards. However, the true molecular weight seemed much larger. Typical UV absorption and fluorescence of a-conjugated polymers were observed with the films. Close examination on the vacuum deposited poly (dibutylgermane) revealed the followings. (1) Results of UV absorption with tilted angles strongly suggested orientation of polygermane molecules. (2) Examination of Ge-O-Ge content in the deposited films by means of IR spectra revealed that the deposited films had no significant difference from the original polymers and thus no incorporation of oxygen takes place during the vacuum deposition process. (3) The deposited films formed with poly (dibutylgermane) which has tendency to crystallize, seemed not stable because lines were seen on SEM images of the samples measured after 1 day. Finally, a tentative mechanism was discussed together with the unique properties and possibilities of polygermanes (σ-conjugated polymers) for vacuum deposition.View full abstractDownload PDF (1768K) -
Haruki KAMIYAMA2007 Volume 70 Issue 6 Pages 364-367
Published: December 25, 2007
Released on J-STAGE: February 17, 2011
JOURNAL FREE ACCESSTaking images of weak light, such as astronomical objects, requires minutes and hours of exposure. However, the resulting data tend to lack richness in tonal range. Traditional methods of image process can impair the precious tones and there was a need to build a dedicated system. The key to realization is the choice of format for recording the taken image and the design of an image processing software. Because I succeeded in the construction of the image processing system with priority on tone reproducibility by adopting 32 bits shades gray, I report it here.View full abstractDownload PDF (2571K)
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