Patent ID: 6877869

Claim:
A cooled mirror for laser applications having a mirror body provided with a mirror surface, the mirror body including several layers connected in a stack-like arrangement, the several layers including a cooler structure provided with connection for an inlet and outlet supplying coolant to the cooler structure, whereby the top layer of the several layers is made from copper forming or containing the mirror surface, comprising: a first intermediate layer made of a material with a reduced heat expansion coefficient equal to or smaller than 10×10 −6 [1/K], said first intermediate layer directly adjacent to the top layer; a bottom layer made from copper facing away from the top layer; a second intermediate layer directly adjacent to said bottom layer, said second intermediate layer made of a material with a reduced heat expansion coefficient; the cooler structure formed from a plurality of copper cooler layers provided between said first and second intermediate layers formed with a plurality of openings, with the area surrounding said openings forming continuous posts that extend in one axis direction perpendicular or crosswise to the mirror surface across the entire thickness of the cooler structure; and wherein all layers of the mirror body connect with each other on the surface by means of direct copper bonding technology or active soldering.