Encyclopedia of Color Science and Technology

Living Edition
| Editors: Ronnier Luo

Instrument: Photometer

  • Shao-Tang Hung
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27851-8_350-1



The photometer is an instrument which can be used to measure photometric quantities such as luminance, illuminance, etc. The parameters are derived from means of law of additives and CIE spectral luminous efficiency functions. The instruments usually transport the measured data either digitally or analogly to display on the screen. CIE had defined the international vocabulary of the photometer: instrument for measuring photometric quantities [1].


The photometer is a universal vocabulary which has plenty of types. According to the applications, the types can be divided to luminance meter, illuminance meter, etc. The luminous-intensity meter is a conventional photometer, which can measure directly luminous intensity (candela, cd). This article will focus on the luminous-intensity meter and is divided into three sections to introduce luminous-intensity meter structure and measuring theories, measuring fields and range, and applications...


Measuring Theory Spectral Weighting Stray Light Luminous Intensity Efficiency Function 
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  1. 1.
    International Commission on Illumination: ILV: International Lighting Vocabulary, CIE S017/E:2011, Vienna (2011)Google Scholar
  2. 2.
    International Commission on Illumination: The Measurement of Absolute Luminous Intensity Distributions, CIE 70–1987, Vienna (2011)Google Scholar
  3. 3.
    International Commission on Illumination: Methods of Characterizing Illuminance Meters and Luminance Meters, CIE 69–1987, Vienna (2011)Google Scholar
  4. 4.
    International Commission on Illumination: Measurement of Luminous Flux, CIE 84–1989, Vienna (2011)Google Scholar

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Center for Measurement StandardsIndustrial Technology Research InstituteHsinchuTaiwan