PHASE TYPE DIFFRACTION ELEMENT, MANUFACTURING METHOD THEREOF, AND IMAGE CAPTURE DEVICE

摘要

A phase-type diffraction device is provided, which includes a transparent substrate (2) having a front surface and a rear surface, and a solidified liquid crystal layer (3) formed on the front surface of the transparent substrate and constituted by a continuous film comprising at least a liquid crystal compound. The solidified liquid crystal layer is constituted by first and second regions (3a, 3i) arranged periodically. The first region is optically anisotropic and the second region is optically isotropic. The first region differs in in-plane average refractive index from the second region.