Patent ID: 7116399

Claim:
A lithographic projection apparatus, comprising: a radiation system configured to provide a beam of radiation; a first support configured to support a patterning device, the patterning device configured to pattern the beam according to a desired pattern; a substrate table configured to hold a substrate; and a projection system configured to project the patterned beam onto a target portion of the substrate, the projection system comprising: an optically active mirror; a second support configured to support at least the mirror; and a heat radiation shield located to intercept heat radiation to or from surfaces of at least one of the second support and the mirror; a heat transport circuit, in thermal contact with the heat radiation shield, configured to transport heat to or from the radiation shield; a third support including respective separate support elements thereon to support the second support and the heat radiation shield on the third support, the support elements and the at least one heat shield being mechanically free from one another except for the support of the third support.