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:
Nov. 13, 1990
Filed:
Mar. 07, 1989
Lawrence H Gilligan, Charlottesville, VA (US);
Sperry Marine Inc., Charlottesville, VA (US);
Abstract
The range to an object is obtained by conveying light rays from the object through an afocal telescope to spatially displaced objective lenses that view the scene from two displaced points of view. The scene images from the objective lenses are focussed on two television sensors, respectively. The video frame from the TV sensors are digitized and stored in respective frame grabbers. A timing and logic circuit controls the television sensors and frame grabbers to alternately provide frames from the two television sensors to a monitor. The timing and logic circuit time shifts the output of one of the frame grabbers with respect to the output of the other frame grabber. A correlator responsive to the frame grabber outputs provides the correlation therebetween. The time shift required to bring the video images of the object into coincidence, at the correlation peak, provides a measure of the range to the object.