Patent 10989601 was granted and assigned to J.A. Woollam Co., Inc. on April, 2021 by the United States Patent and Trademark Office.
A method of applying a reflective optics system that requires the presence of both convex and a concave mirrors that have beam reflecting surfaces. Application thereof achieves focusing of a beam of electromagnetic radiation with reduced effects on a polarization state of an input beam state of polarization that results from adjustment of angles of incidence and reflections from the various mirrors involved.