On the Theories of Optical Reflection from Cholesteric Liquid Crystal Films

  • J. Shashidhara Prasad


One of the unique optical properties of cholesteric liquid crystals, viz., the optical reflection has been theoretically dealt by a number of workers, using two different models: one based on the Oseen’s dielectric continuum model; and the other by using the difference equations for wave propagation in a periodic structure (as in Darwin’s dynamical theory of X-ray diffraction). de Vries(1) and Aihara and Inaba(2) have used the first model to explain the optical reflection at normal incidence. Taupin(3); Berreman and Scheffer(4) have treated the case of oblique incidence and have calculated by numerical methods the reflected and transmitted intensities. Dreher, Meier and Saupe(5) have solved the case of reflection by cholesteric liquid crystals for arbitrary angles of incidence. Chandrasekhar and Srinivasa Rao(6) and Chandrasekhar and Shashidhara-Prasad(7) have discussed the reflection for normal incidence using the second model. In fact, both the approaches are shown to be fully equivalent by Nityananda Rajaram(8).


Oblique Incidence Optical Reflection Cholesteric Liquid Crystal Secondary Maximum Maximum Reflection 
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Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • J. Shashidhara Prasad
    • 1
  1. 1.Department of Physics, ManasagangotriUniversity of MysoreMysoreIndia

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