Patent ID: 8066905

Claim:
A method of producing an optical element, comprising: coating a birefringence layer composition liquid comprising a liquid crystal monomer having a polymerizable group at a terminal thereof and an additive for promoting a homeotropic orientation of the liquid crystal monomer on a light transmitting base material; homeotropically orienting the liquid crystal monomer; crosslinking the liquid crystal monomer to form a birefringence layer to fix an orientation of the liquid crystal monomer; baking the birefringence layer to improve heat resistance and adhesiveness of the birefringence layer by heating at a predetermined temperature; and removing an additive layer formed on an upper surface of the birefringence layer during baking by applying a solvent treatment with a spin coater, wherein: the thickness of the additive layer to be removed is determined on the basis of the thickness of the additive layer to be formed upon design and production of the optical element, and a dose of light in the crosslinking step, the additive, and the amount of the additive to be added, and a haze of the optical element is reduced to 0.1 or less by removing the additive layer.