Patent ID: 7570343
Filing Date: 2009-08-04
Classification: G03F

Abstract:
1. An apparatus, comprising: a housing, a final lens element, a terminating element having a first surface and no overall refractive power that is positioned between, but spaced apart from, the final lens element and an image plane of the apparatus; a fastening member which is fixedly attached to the housing of the apparatus and supports the terminating element in an adjustable manner such that the position of the terminating element with respect to the fastening member is adjustable; a first liquid between the terminating element and the final lens element; a second liquid contacting a second surface of the terminating element, the second liquid extending to the image plane of the apparatus, the second surface of the terminating element is opposite the first surface of the terminating element, wherein the apparatus is a projection lens of a microlithographic projection exposure system.