Motion pick-up apparatus in a non-mechanical printer

US4019186A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Anton Dressen · Dachau, DE
• Klaus Menzel · Berlin, DE

Key dates

• Filing date: Mar 18, 1976
• Grant date: Apr 19, 1977
• Expiry date: Mar 18, 1996

Classification

• Technology area (CPC G): Physics
• CPC primary: G06K15/1271
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A motion pick-up in a non-mechanical printer to produce electric timing signals at instances of time at which given points of a path of motion are crossed includes a light transmissive rod arranged along the path of motion which is parallel to the line of print on a data carrier. The light transmissive rod has marks thereon, or associated therewith at the level of the given points and a laser beam which is split into sub-beams by an acousto-optical beam deflector provides a predetermined sub-beam which is deflected by a polygonal reflector and scanned thereby along the rod. The sub-beam is influenced by the marks in such a manner so as to cause light scattering and reflection through the rod so as to strike a photo-element and produce output signals which constitute electric timing signals. The rod may be glass or a synthetic material. The marks may be constituted by scratches on the rod.