Patent ID: 7664159
Filing Date: 2010-02-16
Classification: G02B,H01S

Abstract:
1. A header assembly for supporting an end mirror in a gas discharge laser comprising: a flange including an inner surface facing the discharge and an opposed outer surface, said flange including a mirror support, said mirror support including a post on the inner surface of the flange for attachment to a mirror element, said mirror support further including a mirror tilt adjustment mechanism on the outer surface of the flange; an elongated mirror element formed substantially from a metal material and attached to the post of the mirror support at the rear surface of the mirror element and with the front surface of the mirror element including an elongated curved reflecting portion for controlling light propagation, said front surface further including at least one planar surface extending parallel to the curved portion; and an elongated strip connected to said planar surface of said mirror element, said strip being formed from a metal material having a coefficient of thermal expansion less than that of the metal material forming the mirror element.