The invention relates to optical elements having image-forming, color- and polarization-selective reflection and containing cholesteric liquid crystals, and to the preparation and use of these elements. In the wavelength- and polarization-selective elements which form an optical image, at least one cholesteric liquid crystal is enclosed in the cavity of constant thickness between two light-transmitting substrates having curved surfaces in such a way that the helix axis of the liquid crystal is aligned perpendicular to the curved surface of the light-transmitting substrates. The elements are suitable for use as beam splitters or recombiners in projection displays.
本发明涉及具有成像、颜色和极化选择性反射的光学元件,其中包含胆甾型液晶,并涉及这些元件的制备和使用。在波长和极化选择性元件中,至少一个胆甾型液晶被封装在两个透光基板之间的恒定厚度的腔体中,这两个透光基板具有曲面,使液晶的螺旋轴垂直于透光基板的曲面。这些元件适用于用作投影显示中的光束分束器或
重组器。