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:
Feb. 04, 1986
Filed:
Dec. 22, 1981
Khosrow Modjallal, Killingworth, CT (US);
Summagraphics Corporation, Fairfield, CT (US);
Abstract
In an optical digitizer, a cursor is movable on a plane surface having coordinate axis. The cursor includes a source of light that is scanned across the coordinate system, and a detector receiving light from the angle to which the beam is instantaneously directed. The coordinate system has curved mirrors at the origin and point spaced from the origin along the axis thereof, and plane mirrors extending along the axis. A calculator determines the position of the cursor in the coordinate system by triangulation. Alternatively, the cursor may be a curved mirror, with rotating light sources and detectors positioned at determined points in the coordinate system.