Patent ID: 7265815
Filing Date: 2007-09-04
Classification: G03B,G03F

Abstract:
1. A system, comprising: an illumination system that produces a beam of radiation, the illumination system having a pupil plane and an object plane; at least one optical element having at least one fluid path therethrough through which the beam passes, which is capable of changing a characteristic of one or more portions of the beam, the at least one optical element being positioned at the object plane; a fluid source that supplies fluid to the at least one fluid path; and at least one of a pressure controller that controls a pressure of the fluid and a concentration controller that controls a concentration of the fluid to change the characteristic of the beam, which is positioned between the fluid source and the optical element, wherein one of telecentricity or intensity uniformity of the one or more portions of the light beam are adjusted based on the optical element in conjunction with the at least one of the pressure controller and the concentration controller.