Patent ID: 7510741
Filing Date: 2009-03-31
Classification: G02B,G02F

Abstract:
1. A method of making an optical body, the method comprising: coating a mixture on a substrate, wherein the mixture comprises a first cholesteric liquid crystal polymer, a second cholesteric liquid crystal monomer, a second cholesteric liquid crystal polymer formed by polymerizing a portion of the second cholesteric liquid crystal monomer prior to coating the mixture on the substrate, and a solvent; wherein the first cholesteric liquid crystal polymer is different than the second cholesteric liquid crystal polymer; and forming from the mixture an optical body comprising a first layer, a second layer, and a third layer disposed between the first layer and the second layer, on the substrate; wherein the first layer comprises a majority of the first cholesteric liquid crystal polymer, the second layer comprises a majority of a second cholesteric liquid crystal monomer and the third layer comprises the second cholesteric liquid crystal polymer.