Measurement of Luminous Intensity

  • H. A. E. Keitz
Part of the Philips Technical Library book series


In Part I two definitions of luminous intensity were introduced. According to the first of these, luminous intensity is the quotient of luminous flux divided by the solid angle, with infinitely small solid angle, that is, the luminous flux per steradian (see Section III–1), and according to the second it is the limit of the product Ed 2 when d → ∞ (Section IX–1).


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  1. 1).
    O. Reeb, Optik 9, 1952, 254–273. “Zur Frage der photometrischen Grenzentfernung”Google Scholar
  2. 2).
    Th. H. Projector, Ill., Eng. 48, 1953, 189–191. “The Use of Zonal Constants in the Calculation of Beam Flux” The same author, Ill. Eng. 48, 1953, 192–196. “Versatile Goniometer for Projection Photometry”Google Scholar
  3. 3).
    J. Bergmans and H. A. E. Keitz, Ph. T. R. 9, 1947, 114–122. “Determining the Light Distribution and Luminous Flux of Projectors”Google Scholar
  4. 4).
    J. M. Waldram, Trans. Ill. Eng. London 16, 1951, 187–207. “The Photometry of Projected Light”Google Scholar
  5. 5).
    A. Blondel, Comptes Rendus 188, 1929, 1464–1467. “Sur une méthode nouvelle pour l’étude en laboratoire des faisceaux des appareils optiques”Google Scholar
  6. P. Cibié, Comptes Rendus 200, 1936, 2136–2138. “Méthode de contrôle en laboratoire des projecteurs de lumière des automobiles”Google Scholar

Copyright information

© N. V. Philips’ Gloeilampenfabrieken, Eindhoven (The Netherlands) 1971

Authors and Affiliations

  • H. A. E. Keitz

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