Optical Elements Having Image-Forming, Color- and Polarization-Selective Reflection and Containing Cholesteric Liquid Crystals, and the Preparation and Use of These Elements

摘要

The invention relates to optical elements with imaging, colour- and polarisation-selective reflection, containing cholesteric liquid crystals, and to the manufacture and use of these elements. The optically imaging, wavelength- and polarisation-selective elements are characterised by the fact that at least one cholesteric liquid crystal is enclosed in the intermediate space of constant thickness between two light-transmitting substrates with curved surface such that the helical axis of the liquid crystal is aligned perpendicularly to the curved surface of the light-transmitting substrates. The elements are suitable for use as beam splitters or recombinators in projection displays.