| http://www.w3.org/ns/prov#value | - ion value in the range of 115 to 150 nm when the retardation value it measured at the wavelength of 550 nm, said quarter wave plate having a ratio of a retardation value to a wavelength in the range of 0.2 to 0.3 when the retardation value is measured at the wavelength of 450 nm, 550 nm, and 650 nm, wherein each of the optically anisotropic layers A and B is a layer made from liquid crystal molecu
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