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1 February 1998 Diffraction optical elements with nematic liquid crystals and their applications
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In this paper consideration is being given to the principle underlying the operation of switchable diffraction elements based on the relief grating of isotropic materials and nematic liquid crystals contacting it. Electrical control of the phase grating diffraction efficiency has been experimentally realized. The problems of LC orientation on the relief substrate have been considered. Consideration has also been given to the optical diffraction lens with switchable focal lengths and to two-layer systems operating with radiation of any polarization. It has been demonstrated that LC having large value of optical anisotropy are most suitable for this application. The requirements to liquid crystals to be used in optical elements are covered.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ihar V. Stashkevitch "Diffraction optical elements with nematic liquid crystals and their applications", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998);

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