Patent ID: 7611244
Filing Date: 2009-11-03
Classification: A61F,G02B

Abstract:
1. A device for use in an optical system to compensate for asymmetrical aberrations in a beam of light, wherein the light beam is directed along a beam path, with the beam path defining an axis and said system comprising: at least one dual compensator positioned on the beam path and substantially centered thereon wherein said dual compensator comprises a first plate having a substantially flat surface with a pattern presented thereon, wherein the pattern has a central point and defines a pattern axis in the surface of said plate and a second plate having a substantially flat surface with a same pattern presented thereon, wherein the central point of said first plate and the central point of said second plate are positioned on the beam path axis with the respective pattern axes substantially perpendicular to the beam path axis, and further wherein the pattern axis of said first plate is rotated through an angle α relative to the pattern axis of said second plate; and a means for rotating said dual compensator about the axis of the beam path through an angle β to compensate for asymmetrical aberrations in the light beam.