Beam position detection system for use in an optical scanning system

• Main Author: RUD; MAYER
• Format: Patent
• Language: English
• Published: 16.10.1984
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

An incremental optical position sensing system utilizes a single laser beam and an out of focus grating which is between a pair of lenses whose focal planes coincide. The scanning laser beam passes through the first lens, scans the grating, passes through the second lens and impinges upon a pair of...