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Applied Optics

Applied Optics


  • Vol. 20, Iss. 2 — Jan. 15, 1981
  • pp: 251–258

Transparent heat mirrors: influence of the materials on the optical characteristics

J. A. Pracchia and J. M. Simon  »View Author Affiliations

Applied Optics, Vol. 20, Issue 2, pp. 251-258 (1981)

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Transparent heat mirrors of the antireflecting metal type with a dielectric/metal/dielectric structure are studied. It is found that dielectrics of lower refractive index give a higher cutoff wavelength, but the transition becomes more gradual. The angular behavior of these mirrors is also analyzed. The optimum mechanical efficiency obtainable with a plain collector and a carnot engine is given for different concentrations and refractive indices. Moreover it appears that using Al instead of Ag introduces appreciable absorption losses (~25–35%).

© 1981 Optical Society of America

Original Manuscript: December 10, 1979
Published: January 15, 1981

J. A. Pracchia and J. M. Simon, "Transparent heat mirrors: influence of the materials on the optical characteristics," Appl. Opt. 20, 251-258 (1981)

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