Abstract
The formulae developed in the preceding chapters all refer to light sources which can be regarded as a point constituting the apex of a solid angle). The derivations have each time been based on the cone-shaped propagation of the luminous radiation, i.e. on the inverse square law.
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References
E. D. Mc Allister, Trans. I.E.S. Am. 9, 1911, 703–721. “The Law of Conservation as applied to Illumination Calculations”. See also: N. A. Halbertsma: “Der Lichtstrombegriff und seine Anwendungen”, Berlin, 1921, p. 34 e.s.
H. Zijl, Ph. T. R. 6, 1941, 147–152. “The Calculation of Lighting Installations with Linear Sources of Light”
H. Zijl: “Manual for the Illuminating Engineer on Large Size Perfect Diffusors”. Philips Technical Library, Eindhoven, 1959
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© 1971 N. V. Philips’ Gloeilampenfabrieken, Eindhoven (The Netherlands)
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Keitz, H.A.E. (1971). Non-Point Sources. In: Light Calculations and Measurements. Philips Technical Library. Palgrave, London. https://doi.org/10.1007/978-1-349-00012-8_9
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DOI: https://doi.org/10.1007/978-1-349-00012-8_9
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