Patent ID: 6535257
Filing Date: 2003-03-18
Classification: G02F

Abstract:
A liquid crystal cell assembly for reducing interference in coherent light beams transmitted therethrough, comprising:a reflective liquid crystal cell comprised of: a substantially transparent flat, planar substrate having electrode materials on its inner surface, a substantially reflective flat, planar substrate having electrode materials on its inner surface, wherein each of said reflective substrate and said transparent substrate has a substantially uniform thickness, a joining adhesive for joining the two substrates to achieve a precisely controlled and parallel spacing between the two substrates, wherein the inner surfaces of the two substrates are facing each other, and a cavity formed by the joining of the two substrates, defined by the inner surfaces, and filled with liquid crystal material; a wedged spacer comprised of a substantially transparent optical material having substantially the same refractive index as the transparent substrate, said wedged spacer having a first planar face and a second planar face non-parallel to the first planar face; and a substantially transparent optical adhesive joining the transparent substrate of the liquid crystal cell to the second planar face of the wedged spacer.