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:
Sep. 08, 1987
Filed:
Jan. 29, 1986
Applicant:
Inventor:
Leo Hoogenboom, Ballston Lake, NY (US);
Assignee:
Mechanical Technology Incorporated, Latham, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
250227 ; 250561 ;
Abstract
A proximity sensor is disclosed having two bifurcate fiber optical bundles arranged in parallel. Light is directed at a target by the bundles and the reflected light from the target is transmitted to two separate sensors. The output difference of the sensors is used to derive a control signal for tracking a target. The control signal has a null point and is used in a servo loop to keep the bundles at a constant distance from the target.