ALEXANDRIA, Va., July 16 -- United States Patent no. 12,669,758, issued on June 30, was assigned to CARL ZEISS SMT GMBH (Oberkochen, Germany).
"Optical element with cooling channels, and optical arrangement" was invented by Eric Eva (Aalen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical element (M2) for reflecting radiation includes: a substrate (31) formed from quartz glass or from a glass ceramic and having a first part-body (26a) and a second part-body (26b) that are joined along a bonding face (27) by hot bonding, a plurality of cooling channels (25) that run within the substrate (31) in the region of the bonding face (27) and are separated from one another by lands (35), and a reflect...