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. 30, 2019
Filed:
Sep. 06, 2018
Bae Systems Information and Electronic Systems Integration Inc., Nashua, NH (US);
Robert T Carlson, Bedford, NH (US);
Amod V Dandawate, Basking Ridge, NJ (US);
David A Haessig, Jr., Towaco, NJ (US);
Dale A Rickard, Manassas, VA (US);
BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US);
Abstract
The Quad Cell permits measurement of four quadrant signal powers simultaneously, metrics which are equal when the laser spot is at the desired zero location, at the center of the cell, the origin of the cells' axes. A control action acts upon the Quad Cell signals to move the laser spot toward the origin of the axes bisecting the four quadrants of the cell, moving the laser spot to the origin to achieve a null in the difference between these four signal levels.