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. 18, 1989
Filed:
Feb. 22, 1985
Per K Hansen, South Burlington, VT (US);
Position Orientation Systems, Ltd., Burlington, VT (US);
Abstract
The present invention relates to a line-of-sight measuring system. The system comprises a passive optical pointing device which measures the relative change in line-of-sight of a focusing reflector attached to a target such as the operator of the device, located within a prescribed three dimensional space. The system utilizes a source of light adjacent a position sensing detector which source of light causes light to be reflected off the focusing reflector amd back to the position sensing detector. In this way, the line-of-sight between the object within the prescribed space and a particular location on a two dimensional screen positioned adjacent the prescribed space may be determined with great accuracy. The present invention also includes the electronic circuitry which interfaces the present invention with a computer such as a personal computer including an input keyboard and a display screen. Other applications of the present invention are also disclosed herein.