Journal of the Illuminating Engineering Institute of Japan

Online ISSN : 2185-1506
Print ISSN : 0019-2341
ISSN-L : 0019-2341

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Volume 9, Issue 3

Displaying 1-8 of 8 articles from this issue

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Graphical and Mechanical Computations of Illumination Design

Ryonosuké Kurosawa

1925Volume 9Issue 3 Pages 275-359
Published: 1925
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.2150/jieij1917.9.275

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With a view to convenience of computation in the illumination design, how many schemes have been laid! However, many of them were buried in eternal obscurity. Now, I will pick up as many of them as possible to introduce to you, and they, as well as those which were recently devised in our Illuminating Engineering Section, shall be exposed to receive your comments.

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A New Calculatineg Method of Light Flux, and A New Light Distribution Curves

S. Seki

1925Volume 9Issue 3 Pages 360-368
Published: 1925
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.2150/jieij1917.9.360

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1. From experiences, the writer compared the striking features of the known methods of obtaining light flux from distribution Curve, and introduced a new mode after his own design.
This mode does not involve degree of skilfulness; moreover it may be readily used by unfamiliar hands acculately.
2. In Wohlauer's method, error in the value of constant used is observad and corrected.
3. For the study of street lighting fixtures, a particular type of distribution curve is devised
By means of this curve not only the light distributioa but also the illumination on the read may be deduced at the same time.
Thereby any street ligting fixtures are immediately determined as to fitness for this purpose.

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Approximate Methods of Calculating the Mean Value and its Application to the Determination of Mean Candle Power and Total Flux. I

Ziro Yamanouti

1925Volume 9Issue 3 Pages 369-390
Published: 1925
Released on J-STAGE: March 02, 2011

DOIhttps://doi.org/10.2150/jieij1917.9.369

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The several methods of approximate calculation of mean value are shown. The number of ordinates taken are 2 to 10 and the coefficients are calculated to seven figures. Accuracy of those methods are compared with each other by calculating the values of for m= 1, 2, 3 and 5. The results are concluded as follows

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Miscellaneous

1925Volume 9Issue 3 Pages 391-400
Published: 1925
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.2150/jieij1917.9.391

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Erratum to : Graphical and Mechanical Computations of Illumination Design

1925Volume 9Issue 3 Pages e1
Published: 1925
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.2150/jieij1917.9.3_e1

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Erratum to : A New Calculatineg Method of Light Flux, and A New Light Distribution Curves

1925Volume 9Issue 3 Pages e2
Published: 1925
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.2150/jieij1917.9.3_e2

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Erratum to : A New Calculatineg Method of Light Flux, and A New Light Distribution Curves

1925Volume 9Issue 3 Pages e3
Published: 1925
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.2150/jieij1917.9.3_e3

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Erratum to : Miscellaneous

1925Volume 9Issue 3 Pages e4
Published: 1925
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.2150/jieij1917.9.3_e4

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