LIQUID CRYSTAL POLARIZATION INTERFERENCE ELEMENT, OPTICAL FILTER, AND OPTICAL SYSTEM

원문 (중국어)

A liquid crystal polarization interference element is provided that suppresses fluctuation in the wavelength at which maximum transmittance occurs, even when light is incident at an oblique angle. The element includes two or more sets of liquid crystal layers, each set having a first liquid crystal layer and a second liquid crystal layer. Each of the first and second liquid crystal layers includes a liquid crystal layer R formed by immobilizing horizontally aligned rod-like liquid crystal compounds and a liquid crystal layer D formed by immobilizing vertically aligned disk-like liquid crystal compounds. The liquid crystal layer R and the liquid crystal layer D have parallel slow axes and equal in-plane retardations, and the first liquid crystal layer and the second liquid crystal layer have in-plane slow axes that intersect each other. An optical filter including the liquid crystal polarization interference element is also provided.