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Applied Optics

Applied Optics


  • Vol. 17, Iss. 19 — Oct. 1, 1978
  • pp: 3051–3053

Thermal emissivity of semitransparent and opaque films of cholesteric liquid crystal

Nobuya Tamura and Seiji Takata  »View Author Affiliations

Applied Optics, Vol. 17, Issue 19, pp. 3051-3053 (1978)

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Thermal emissivity of cholesteric liquid crystal films is measured as a function of the film thickness d. increases from 0.2 to 0.4 in parallel with the increase of d from 13 μm to 33 μm and arrives at a constant value as high as 0.87 in the case of d ~ 1 mm. Reflectance at the air-to-liquid crystal interface and the absorption coefficient of the liquid crystal layer are found to be 0.130 and 7.24 × 10−3μm−1, respectively. The dependency of on d is interpretable on the basis of McMahon’s theory of radiant characteristics of semitransparent radiators.

© 1978 Optical Society of America

Original Manuscript: January 10, 1978
Published: October 1, 1978

Nobuya Tamura and Seiji Takata, "Thermal emissivity of semitransparent and opaque films of cholesteric liquid crystal," Appl. Opt. 17, 3051-3053 (1978)

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  1. For example, C. Tingwaldt, U. Schley, J. Verch, S. Takata, Optik 22, 48 (1965).
  2. S. Takata, J. Soc. Instrum. Control Eng. 4, 867 (1965) (in Japanese).
  3. H. O. McMahon, J. Opt. Soc. Am. 40, 376 (1950). [CrossRef]
  4. J. C. Richmond, W. M. Harrison, J. Res. Nat. Bur. Stand. Sect. C: 66, 261 (1962).

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