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Volume 33 (1970 - 197･･･
- Issue 5 Pages 259-
- Issue 4 Pages 193-
- Issue 3 Pages 127-
- Issue 2 Pages 65-
- Issue 1 Pages 1-
Volume 33, Issue 2
Displaying 1-6 of 6 articles from this issue
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Tadashi KASAHARA1970 Volume 33 Issue 2 Pages 65-72
Published: August 15, 1970
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe progress of holographic techniques have proved a possbility of a practical high quality 3-D display. Hologram might be considered as the ideal 3-D reconstruction of the coherently illuminated object, however, it cannot be applied succesfully to visualize the incoherently illuminated 3-D ordinary scenes.
In order to solve this problem, various methods have recently proposed. The classical idea of Integral Photography (I. P.) which had been originated 62 years ago by Lippmann has rearranged by Pole and many other people utilizing modern imaging devices. In case of Holographic Stereogram (H. S.), fly's eye lenses of I.P. can be substituted by the imaging properties of miniature hologram elements. Parllax Panoramagram utilizing Cylindrical Lenticular Screen (L. S.) may be regarded as a special modefication of I. P.
A f aithf ull reconstruction of 3-D objects requires a vast information capacity of the recording medium or of the transmission line. The concept of the bandwidth compression should become important not only for 3-D T. V. but also for ordinary 3-D displaying devices.View full abstractDownload PDF (4464K) -
Takekimi SHIOZAWA1970 Volume 33 Issue 2 Pages 73-79
Published: August 15, 1970
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSCrystalline structures of developed silver formed on primitive tabular silver bromide emulsion crystals by exposure and partial development were studied electron microscopically. Especially, a high voltage (accelerating voltage, 1000 kV) electron microscope was used for the direct observations of the structures.
The developed silver was found to be classified morhologically into the following three different types;
Type I -One filamentary silver grew from a development center of several thousand angstroms in size. It oriented mainly to the ‹110› direction to the incident electron beam.
Type II-A filament grew from a smaller development center than that of type I (the center was less than 1000 Å in size). It oriented to the ‹211› or ‹110› directions.
Type III-Non-filamentous, platelet silver. First, a development center with a {111} plane was formed and then few specks with a {110} plane grew on it.
By using the high voltage electron microscope, the lattice imperfections in developed silver such as stacking faults were observed clearly.View full abstractDownload PDF (17440K) -
Dependence of Sensitometric Characteristics upon the Composition of Thiocyanate and ThiosulfateNobuo MII, Akira SASAI, Shinya MIZUSAWA, Teruhiko SANO1970 Volume 33 Issue 2 Pages 80-87
Published: August 15, 1970
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSEffects of composition variations of potassium thiocyanate and sodium thiosulfate as fixing agents in a P-Q monobath were investigated.
Thiocyanate acts remarkably as an accelerator for development in the monobath especially at lower exposure levels. An addition of 40 mole % of thiocyanate per total fixing agentswhen the concentration is adjusted to obtain the required gamma, leads to the highest effective speed of photographic materials.
Practical formulations for commercial negative films are considered.View full abstractDownload PDF (982K) -
Tadaaki TANI1970 Volume 33 Issue 2 Pages 88-94
Published: August 15, 1970
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe present auther has previously proposed and discussed the mechanisms of photographic effects (spectral sensitization, supersensitization, and desensitization) caused by various dyes. Based on these mechanisms, photographic dyes are clasified into the following 5 groupes:(Sensitizing dyes) A; “Ultra” sensitizing dyes for visible light-show neither the desensitization by halogen acceptor (DH) nor the desensitization by electron acceptor (DE). B; Conventional sensitizing dyes for visible light-show DH, while they do not show DE. C; Sensitizing dyes for infra-red light-show both DH and DE.(Non-sensitizing dyes) D; Desensitizing dyes-show DE. E; Non-planor dyes-show DH. Photographic effects of some dyes which belong to groups A, B, C, and D were shown in order to clarify the above-mentioned classification.View full abstractDownload PDF (780K) -
Photoconduction of PolythiohydantoinesRyo HIROHASHI, Yasushi HISHIKI, Seiji ISHII1970 Volume 33 Issue 2 Pages 95-102
Published: August 15, 1970
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSPolythiohydantoins were synthesized by the polycondensation or polyaddition reaction of p-phenylene bisthiohydantoin with terephthal aldehyde, dinitrosobenzene, terephthaloyl chloride, p-phenylene diisothiocyanate and 2, 4-tolylene diisocyanate.
For the investigation of photo-conduction in 10-6 Torr, surface-type cell was employed to avoid the effect of space charge which was observed in sandwich-type cell. Dependence of dark-current and photo-current on the electrical field strength showed a linear relationship.
The light-intensity dependences and spectral responce of illumination for photo-current were observed. The values of the slope (n) in the expression Ip=kLn were from 1.33 to 1.49 in polymers. The peaks on the response curve of photo-current were showed at ca. 500 mμ in all polythiohydantoins.View full abstractDownload PDF (876K) -
[in Japanese]1970 Volume 33 Issue 2 Pages 103-108
Published: August 15, 1970
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (3057K)
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