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About This Item

 

Full Description

The purpose of photometry is to measure light as perceived by the human eye. The brightness of a luminous surface depends not only on the amount of radiation it emits, transmits or reflects, but also on its spectral composition and on the visual response function of the observer viewing it.

 

Document History

  1. CIE ISO 23539:2023


    Photometry - The CIE system of physical photometry

    • Most Recent
  2. CIE ISO DIS 23539:2021

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    Photometry - The CIE system of physical photometry

    • Historical Version
  3. CIE S 010/E:2004 (ISO 23539:2005)


    Photometry - The CIE system of physical photometry

    • Historical Version