Method and device for rotating a wafer which is arranged floating in a reactor. A curved objective mirror directs the incident illumination received along the optical axis toward the retina of the eye and directs image-bearing light reflected from the retina back along the optical axis. A second extra thickness around a bolt hole is a closely layered construction of nearly rigid body little to be deformed. The mobile station may receive data on multiple carriers at the same time for multi-carrier operation on the downlink.