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:
Mar. 18, 1986
Filed:
Dec. 13, 1982
Per K Hansen, Burlington, VT (US);
Position Orientation Systems, Ltd., S. Burlington, VT (US);
Abstract
A device is disclosed which enables calculation of the location of an object within a three dimensional work area. The system utilizes a pair of position sensing detectors each of which is surrounded by light emitting diodes (LED's) and requires attachment of a retro-reflector to each target whose position is to be determined. In a preferred embodiment, each position sensing detector is surrounded by infrared LED's of two different light wavelengths. Two targets are present in the work area each with a retro-reflector attached thereto and each including a single bandpass filter, in front of its retro-reflector, one target having a bandpass filter corresponding to one LED wavelength and the other target having a bandpass filter corresponding to the other LED wavelength. Circuitry is also disclosed which drives the LED's and interprets the signals received by the position sensing detectors so that the position of the two targets may be determined and displayed in the form of x, y, and z coordinates.