Patent ID: 7317530
Filing Date: 2008-01-08
Classification: G01J,G01N,G02B

Abstract:
1. A combined spatial filter and relay system comprising three elements: a) a concave spherical mirror having at least one concave spherical surface and an aperture hole therethrough; b) a flat mirror; and c) a convex spherical mirror having at least one convex spherical surface; said elements being arranged such that electromagnetic radiation caused to approach the concave spherical mirror passes through said aperture hole thereby forming an effective point source of electromagnetic radiation thereat, then proceeds as an expanding electromagnetic beam and reflects from said flat mirror onto a first location of a concave surface of said concave spherical mirror, then reflects from said first location onto a convex spherical surface of said convex spherical mirror and reflects therefrom onto a second location of said concave surface of said concave spherical mirror from which it reflects as a converging beam of electromagnetic radiation.