Abstract
Obviously, the amount of luminous flux falling on an object emitting no light of its own is very important from the aspect of observation of that object. We wish to know, therefore, how strongly an object or a surface is illuminated and the natural course is to express the intensity of the illumination, or illumination (symbol E) in terms of the luminous flux per unit area of the surface thus illuminated.
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© 1971 N. V. Philips’ Gloeilampenfabrieken, Eindhoven (The Netherlands)
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Keitz, H.A.E. (1971). Illumination. In: Light Calculations and Measurements. Philips Technical Library. Palgrave, London. https://doi.org/10.1007/978-1-349-00012-8_6
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DOI: https://doi.org/10.1007/978-1-349-00012-8_6
Publisher Name: Palgrave, London
Print ISBN: 978-1-349-00014-2
Online ISBN: 978-1-349-00012-8
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