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:
May. 04, 1976
Filed:
Mar. 11, 1974
Applicant:
Inventors:
Ake Hugo Blomqvist, Karlskoga, SW;
Bertil Torbjorn Eriksson, Karlskoga, SW;
Assignee:
AB Bofors, Bofors, SW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ; G01J / ;
U.S. Cl.
CPC ...
356152 ; 2502 / ; 250216 ; 356-4 ; 356-5 ;
Abstract
The invention relates to optical target tracking. A target image, particularly based on reflected laser light, is projected by an optical system onto a light-sensitive detector, control signals for directing purposes being generated depending on the position of the target image on the detector surface. At least when a clear target image on the detector surface would be small in comparison with the detector surface, the area of the target image is increased by blurring the target image, for instance by displacing the detector plane from the image plane of the optical system.