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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 22, Iss. 3 — Mar. 1, 2005
  • pp: 416–423

Color rendering properties of interior lighting influenced by a switchable window

Marta Klanjšek Gunde, Urša Opara Krašovec, and Werner J. Platzer  »View Author Affiliations

JOSA A, Vol. 22, Issue 3, pp. 416-423 (2005)

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Switchable windows are being installed into modern buildings. We report on how the variable transmittance of gasochromic and electrochromic switchable windows changes the color rendering properties of the daylight passing through these windows. We present a series of color rendering examples. Correlated color temperature and color rendering indices are insufficient to describe the color properties of this filtered light, as these indices are beyond the applicability limits. We obtain more reliable results using the color shifts ( Δ E ) of different objects. We find that as the transmittance of the window changes, each surface color moves along a path of the CIELAB space in the same direction for both switchable units. The direction and distance moved differs among test-color samples. The appearance of an array of colored objects is strongly distorted at higher coloration states of the windows.

© 2005 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(310.6860) Thin films : Thin films, optical properties
(330.1730) Vision, color, and visual optics : Colorimetry

Original Manuscript: February 10, 2004
Revised Manuscript: October 6, 2004
Manuscript Accepted: September 12, 2004
Published: March 1, 2005

Marta Klanjšek Gunde, Urša Opara Krašovec, and Werner J. Platzer, "Color rendering properties of interior lighting influenced by a switchable window," J. Opt. Soc. Am. A 22, 416-423 (2005)

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