Patent ID: 6248259
Filing Date: 2001-06-19
Classification: C07D,C08F,C09K,G02B

Abstract:
An optical element showing a circular dichroism, comprising a solid layer of a grandjean oriented cholesteric liquid crystal phase comprising a side chain liquid crystal polymer having a structural unit comprising an optically active monomer for forming the side chain liquid crystal polymer represented by the following formula (a): ##STR15##wherein R.sup.1 represents a hydrogen atom or a methyl group, A represents an organic group, and B represents an organic group represented by the following formula (2a) ##STR16##wherein Y represents OCO-- or 0.ltoreq.n.ltoreq.3; and R.sup.3 represents --C.sub.d H.sub.2d+1 when n is 0 and represents --OC.sub.d H.sub.2d+1, --H, --CN, or --Cl when 1.ltoreq.n.ltoreq.3, wherein d is 1.ltoreq.d.ltoreq.3;and the optical element has a retardation layer of converting a circularly polarized light to a linearly polarized light.