Patent ID: 9523925
Filing Date: 2016-12-20
CPC Classification: G02B,G03F

Claim Text:
1. A single reflective optical element for use in polarization of a laser beam, comprising: a support having a cut-out to allow passage of a circularly polarized laser beam; and at least two strips having a reflective surface arranged in the cut-out, wherein the strips are tilted at a critical angle relative to the circularly polarized laser beam and the reflective surface faces the circularly polarized laser beam, and wherein the strips are positioned so that when the circularly polarized laser beam passes through the cut-out, portions of the circularly polarized laser beam are reflected to generate linearly polarized beams that overlap with the circularly polarized laser beam and form an interference pattern where the circularly polarized laser beam passes out of the support, wherein the interference pattern creates photonic crystals or photonic crystal templates in a photosensitive material.