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    • 5. 发明申请
    • Space-Variant Liquid Crystal Waveplate
    • 空间变体液晶波片
    • US20080226844A1
    • 2008-09-18
    • US12045510
    • 2008-03-10
    • David M. ShemoScott McEldowneyJerry Zieba
    • David M. ShemoScott McEldowneyJerry Zieba
    • G02B27/00C09K19/00
    • G03F7/70566G02B5/3016G02B5/3083G02F2413/09G03F7/70966Y10T428/10
    • The invention provides a space-variant liquid-crystal (LC) photo-aligned waveplate having a vortex optic axis pattern, and an apparatus and method for fabricating thereof. The method in it preferred embodiment includes exposing a substrate coated with a photo-alignable material such as LPP to linearly polarized UV radiation through a wedge-shaped aperture, while rotating two of the aperture, the substrate and the polarization of the UV light, so that an exposure area performs a full rotation about a center point on the substrate, at angular velocities selected so as to form a vortex alignment pattern of a pre-defined order. An LC material is then deposited on the substrate in direct contact with the photo-alignable material so that the LC director is aligned according to the photo-induced vortex alignment pattern. The method enables to fabricate vortex waveplate of any pre-defined vortex order.
    • 本发明提供一种具有涡旋光轴图案的空间变异液晶(LC)光取向波片及其制造方法。 在其优选实施例中的方法包括将通过楔形孔的光可对准材料(例如LPP)涂覆的线性偏振UV辐射同时旋转孔径,衬底和UV光的偏振两者,使得 曝光区域以选定的角速度围绕基板上的中心点执行完全旋转,以便形成预定顺序的涡流对准图案。 然后将LC材料沉积在与光可校准材料直接接触的基板上,使得LC导向器根据光诱导的涡流对准图案对准。 该方法能够制造任何预定义的涡流顺序的涡流波片。