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:
Apr. 06, 2004
Filed:
Jul. 27, 2001
Jörg Wörner, Weilheim/Teck, DE;
Leuze Electronic GmbH & Co., Owen/Tech, DE;
Abstract
An optoelectronic apparatus for detecting objects in a monitored region includes a transmitter that emits transmission light, a receiver that receives a reflected light, and an evaluation unit, in which the transit time t of the transmission light that is guided in the monitored region and reflected back, as a reflected light, by an object is evaluated. The transmitter emits the transmission light in the form of a sequence of transmission light pulses. A portion of the light quantity of a transmission light pulse is coupled out as a reference transmission light pulse and guided by way of a reference path to the receiver. The transit time t of the reference transmission light pulse guided as a reference reflected light pulse to the receiver is determined in the evaluation unit. The transit-time difference t −t is used to determine the distance of an object.