The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 1990
Filed:
May. 16, 1988
Dietrich Dopheide, Brunswick, DE;
Michael Faber, Brunswick, DE;
Gerhard Reim, Rothemuehle, DE;
Guenter Taux, Brunswick, DE;
Abstract
In a device for measuring the speed of moving light-scattering objects by means of laser beams, with which a periodic intensity distribution (4) is produced at the measuring point (3), and by means of a detecting device (5, 7; 8, 9, 10) for light scattered by the object, it is possible to produce the periodic intensity distribution in a simple fashion with a laser diode array (1) in which a plurality of laser diodes are arranged at a defined separation from one another. Light emitted by the laser diode is focussed at the measuring point (3) with a focusing optical system (2). In addition, when measuring speed it is possible to discriminate direction by arranging the laser diode array (1, 13) such that no emission occurs in at least one such location (11') of the laser diode (11), so that an asymmetric intensity distribution is produced at the measuring point (3).