OPTICAL APPARATUS FOR SCANNING A TAPE-SHAPED RECORD CARRIER

摘要

An optical apparatus for scanning a tape-shaped record carrier (1) is described, in which a mirror polygon (20) is used for scanning tracks which extend perpendicularly to the tape travel direction (5), and in which the mirror polygon is tiltable so as to adapt the scanning direction to the track direction. By rendering the tilt axis (40) parallel to the chief ray of the scanning beam (b) incident on the polygon, it is ensured that the scanning track remains straight.