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:
Aug. 04, 1998
Filed:
Oct. 23, 1996
Franz Schwarz, Glottertal, DE;
Sick AG, Waldkirch/Breisgau, DE;
Abstract
The invention relates to an optical detection device for determining the position of an indicator medium on or in front of a projection surface with an optical monitoring field arranged directly in front of or slightly spaced from the presentation surface parallel to the latter, wherein either at least one scanner is provided which transmits light beams in the plane of the monitoring field, which scans the monitoring field and delivers angle and distance measurements related to the respective position of the indicator medium in the monitoring field, or wherein, starting from two different positions, range and/or angle measurement devices are provided which transmit light beams in the plane of the monitoring field, and wherein the angular range scanned by each of the two range and/or angle distance measuring devices respectively embraces the whole monitoring field, and wherein the respective position of the indicator medium in the monitoring field can be computed from the range and angular values delivered by the range and/or angle measurement devices.
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