Luminous intensity8/11/2023 The following members of TC 2. The publication contains 54 pages, 19 figures and 2 tables. The report is based on, and supplementary to, CIE 53-1982 Methods of Characterizing the Performance of Radiometers and Photometers. The various sections contain sufficient data on the required characterization of goniophotometers. The luminous intensity is defined as the luminous flux per solid angle and it expresses the directionality of the energy radiated by the light. Other subjects covered are power supply, measurement conditions and execution, correction, and representation of luminous intensity distribution measurements. Types of goniophotometers, possibilities for angle encoding, characteristics of the photo-electronic system, and data acquisition and processing for measurements of luminous intensity distributions are discussed in detail. The coordinates systems used for the measurement and representation of luminous intensity distributions are described. It summarizes the principles of luminous intensity measurements and the requirements for the photometer heads employed for such measurements. The candela per square metre is sometimes called the nit.This report contains the terminology required for measurements of luminous intensity distributions. Luminous flux per unit solid angle per unit projected source area. These relations apply equally to subscripted flux and intensity and to. does not depend on the azimuthal coordinate ) equation 1.6.3 becomes. If the intensity is axially symmetric (i.e. The lumen second is sometimes called the talbot. Expressed in spherical coordinates, this is. ![]()
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