A diffraction based polarisation independent lightvalve

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A diffraction based polarisation independent lightvalve

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Polarisation dependence of LC lightvalves results in losses in projection systems and viewers alike. Recently this is typically overcome by the use of polarisation conversion optics (PCOS) in higher efficiency projection systems at the cost of increased optical extent. An alternative approach is to overcome the polarisation dependence at the light valve. Here we report practical, diffraction based, polarisation independent operation and the options for the structure of the lightvalve pixel. (6 pages)

Inspec keywords: light valves; diffraction gratings; liquid crystal displays; optical projectors; light polarisation

Subjects: Liquid crystal devices; Display equipment and systems

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