Patent 10527830 was granted and assigned to KLA-Tencor on January, 2020 by the United States Patent and Trademark Office.
An optical relay system includes four or more reflective optical elements oriented in a tilted configuration. Each of the four or more reflective optical elements is tilted about one of four or more tilt axes. Further, the four or more tilt axes are oriented to correct for aberrations induced by the tilted configuration.