Polarization element comprising a plurality of metal protruding sections formed in a striped manner having first and second heat radiation sections tilted in opposite directions

摘要

A polarization element includes: a substrate; a plurality of protruding sections formed on the substrate in a striped manner in a plan view; and a heat radiation section formed on a top portion of each of the protruding sections, wherein the heat radiation section has a concavo-convex section.