Patent ID: 7108960
Filing Date: 2006-09-19
Classification: G03F

Abstract:
1. A lithographic projection apparatus comprising: a radiation system configured to provide an unpatterned beam of radiation; a support configured to support a patterning device, the patterning device configured to pattern the unpatterned beam according to a desired pattern; a substrate table configured to hold a substrate; a projection system configured to project the patterned beam onto a target portion of the substrate, a sensor configured to detect luminescent radiation radiated by at least one region of an area on a component of the apparatus traversed by the unpatterned beam or the patterned beam; and a control device configured to determine the intensity, in the at least one region, of the unpatterned beam or the patterned beam from the detected luminescent radiation, wherein the component is a reflector within one of the projection system and the radiation system.