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:
Jan. 12, 1988
Filed:
Oct. 01, 1986
Applicant:
Inventor:
Leo Hoogenboom, Ballston Lake, NY (US);
Assignee:
Mechanical Technology Incorporated, Latham, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
250201 ; 250227 ;
Abstract
A proximity sensor includes a bifurcated optic fiber bundle with a face and a projection lens for projecting an image on a target and a feedback control loop for maintaining said face at a preselected distance from the target for tracking. An oscillating device is provided which is disposed in the light path with fixed excursion between the face and the target and which generates an AC component in said sensor signal that is proportional to the deviation of the actual distance from the preselected distance, whereby the error signal is kept near zero.