Patent ID: 8758869

Claim:
An optical element comprising: a base layer; a liquid crystal layer which is formed on a top portion of the base layer, of which a difference between in-plane refractive indexes in a slow axis direction and a fast axis direction is from 0.05 to 0.2, which has a thickness of 0.5 μm to 2.0 μm, which comprises a multifunctional polymerizable liquid crystal compound and a monofunctional polymerizable liquid crystal compound, the monofunctional polymerizable liquid crystal compound being comprised in an amount of greater than 0 parts by weight and not more than 100 parts by weight relative to 100 parts by weight of the multifunctional polymerizable liquid crystal compound, and which comprises first and second regions having different phase retardation properties; a polarizer attached to a bottom portion of the base layer; and a water-based adhesive layer, by which the polarizer is attached to the base layer.