| 摘要 |
An optical element is claimed, which comprises a substrate, one or more orientation layers and one or more anisotropic layers made from crosslinked liquid crystal monomers or oligomers with local differences in orientation of the liquid crystal molecules. The novelty is that at the boundary between the liquid crystal layer and the orientation layer, the orientation layer has a fan-like or zig-zag structure, so that the average dimension of the lines making up the fans is no greater than the thickness of the liquid crystal and the angle between neighbouring lines is not more than 3 degrees. Also claimed is the preparation of the element. |
