Reference number
ISO/CIE 23539:2023
International Standard
ISO/CIE 23539:2023
Photometry — The CIE system of physical photometry
Edition 1
2023-03
Read sample
ISO/CIE 23539:2023
83178
Published (Edition 1, 2023)

ISO/CIE 23539:2023

ISO/CIE 23539:2023
83178
Language
Format
CHF 173
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Abstract

This document specifies the characteristics of the system of physical photometry established by the CIE and accepted as the basis for the measurement of light. It defines the photometric quantities, units and standards that make up the CIE system of physical photometry and that have been officially accepted by the Comité International des Poids et Mesures (CIPM). This comprises:

    the definition of photometric quantities, symbols and units;

    the definition of CIE spectral luminous efficiency functions for photopic vision, scotopic vision, mesopic vision and 10° photopic vision;

    the definition of CIE photometric observers that conforms to these functions;

    the definition of maximum luminous efficacy for photopic vision, mesopic vision, scotopic vision and 10° photopic vision.

General information

  •  : Published
     : 2023-03
    : International Standard published [60.60]
  •  : 1
     : 44
  • CIE
    17.180.01 
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