Encyclopedia of Color Science and Technology

Living Edition
| Editors: Ronnier Luo

Spectral Luminous Efficiency

  • János Schanda
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27851-8_327-1

Synonyms

Definition

Spectral luminous efficiency (of a monochromatic radiation of wavelength λ) [V(λ) for photopic vision; V′(λ) for scotopic vision] (see CIE e-ILV [1])

Ratio of the radiant flux at wavelength λm to that at wavelength λ such that both produce equally intense luminous sensations under specified photometric conditions and λm is chosen so that the maximum value of this ratio is equal to 1.

Unit: 1

Overview

By the end of the nineteenth century, photometry achieved a level where it became necessary to describe the light perception efficiency of radiation of different wavelengths. Several methods were used to determine the spectral luminous efficiency function (called also spectral visibility). The two most important ones were direct comparison and the flicker method (based on the fact that if two lights are seen alternatively with increasing frequency, first the sensation of...

Keywords

Luminance Level Foveal Vision Relative Visibility Scotopic Vision Blue Lead Light 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

  1. 1.
    CIE e-ILV item 17–1222 in http://eilv.cie.co.at/term/1222
  2. 2.
    CIE Compte Rendu 6e session, p. 67Google Scholar
  3. 3.
    CIE Photometry – The CIE System of Physical Photometry CIE S 010/E:2004/ ISO 23539:2005(E)Google Scholar
  4. 4.
    CIE Recommended System for Mesopic Photometry based on Visual Performance, CIE 191:2010Google Scholar
  5. 5.
    CIE Compte Rendu 12e session, vol. 3, p. 37Google Scholar
  6. 6.
    CIE 1988 Modified 2° Spectral Luminous Efficiency Function for Photopic Vision”, VM(λ), CIE 86–1990Google Scholar
  7. 7.
    CIE 10° photopic photometric observer”, V 10(λ), CIE 165:2005Google Scholar
  8. 8.
    CIE Fundamental Chromaticity Diagram with Physiological Axes – Part 1, CIE 170-1:2006, and draft of Part 2Google Scholar
  9. 9.
    Sharpe, L.T., Stockman, A., Jagla, W., Jägle, H.: A luminous efficiency function, V*(λ), for daylight adaptation. J. Vis. 5, 948–968 (2005)zbMATHCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • János Schanda
    • 1
  1. 1.University of PannoniaVeszprémHungary