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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 29, Iss. 25 — Sep. 1, 1990
  • pp: 3699–3703

Experimental study of CdCl2:CuCl photochromic coatings

H. Marquez, J. Ma Rincon, and L. E. Celaya  »View Author Affiliations


Applied Optics, Vol. 29, Issue 25, pp. 3699-3703 (1990)
http://dx.doi.org/10.1364/AO.29.003699


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Abstract

We present measurements of the spectral transmittance and photochromic response of CdCl2:CuCl coatings. The coatings are also examined with the aid of electron micrographs. We explain the features observed in the spectral transmittance of darkened photochromic films, using a colloidal model obtained from the generalized Maxwell-Garnett theory. The colloidal model indicates the presence of ellipsoidal copper particles with a shape factor (minor axis/major axis) between 0.39 and 0.42 and mean ratios between 2.03 and 1.73 nm. The optical transmittance curve obtained in the faded state shows a peak near 280 nm attributed to Cu+, and the curve in the darkened state shows two bands, a band located at 375 nm attributed to Cu2+ and another at 600–610 nm assigned to colloidal copper particles.

© 1990 Optical Society of America

History
Original Manuscript: August 4, 1989
Published: September 1, 1990

Citation
H. Marquez, J. Ma Rincon, and L. E. Celaya, "Experimental study of CdCl2:CuCl photochromic coatings," Appl. Opt. 29, 3699-3703 (1990)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-25-3699

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