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Volume 40, Issue 7
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[in Japanese]1956 Volume 40 Issue 7 Pages 282-283
Published: 1956
Released on J-STAGE: July 19, 2011
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[in Japanese]1956 Volume 40 Issue 7 Pages 284-288
Published: 1956
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSDownload PDF (10382K) -
1956 Volume 40 Issue 7 Pages 289-295
Published: 1956
Released on J-STAGE: July 19, 2011
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Mitio Miura1956 Volume 40 Issue 7 Pages 296-299
Published: 1956
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSTo illuminate the vertical wall, if we set two long linear lightsource in front of the top and bottom lines of the wall parallel to them, the distance for the most efficient illumination will be given by the half height of the wall.View full abstractDownload PDF (2672K) -
Kikuo Okuma, Takashi Azuma, Yoshindo Honda1956 Volume 40 Issue 7 Pages 300-302
Published: 1956
Released on J-STAGE: July 19, 2011
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Shigeharu Nakajima, Yoshito Honda1956 Volume 40 Issue 7 Pages 305-309
Published: 1956
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSSome results of the study on Ca-Sr-orthophosphate phosphor are described. By the development of this phosphor, it was made possible to make a new type of fluorescent lamps which give very good color rendition. As the main constituents of the fluorescent coatings, these lamps utilize the following combination of phosphors; Ca-Sr-orthophosphate: Sn which makes 3, 500°K lamps when applied singly to fluorescent lamps, Ba-pyrophosphate: Ti with blue white emission, and Mg-Boro-arsenate: Mn which adds the deep red emission. In addition to those three phosphors, Zn-silicate: Mn and Catungstate was used in cool white and daylight type lamps respectively for color adjustment. The available color domain of the lamps with Ca-Sr-orthophosphate: Sn phosphor of various compositions has been studied and plotted on the C. I. E. chromaticity diagram. Also the spectral energy distribution curves, color rendering properties, luminous efficiencies and the lumen maintenance of these new type lamps are described.View full abstractDownload PDF (751K) -
1956 Volume 40 Issue 7 Pages plate1-plate2
Published: 1956
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSDownload PDF (2677K)
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