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:
Oct. 14, 2003
Filed:
Apr. 27, 1999
Applicant:
Inventors:
Kurt Pelsue, Wayland, MA (US);
Jonathan S. Ehrmann, Sudbury, MA (US);
Assignee:
GSI Lumonics, Inc., Kanata, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 5/222 ; H04N 7/00 ;
U.S. Cl.
CPC ...
H04N 5/222 ; H04N 7/00 ;
Abstract
The field portion ( ) of a workpiece ( ) that an electro-optical system ( ) can image is deflected by a field-of-view deflector ( ) and an array of light sources ( ) illuminates the workpiece. As the field of view ( ) moves about the workpiece surface, individual sources ( ) in the light-source array are so turned on and off that all sources that could be imaged into the field of view by specular reflection are turned off. In this way, proper dark-field illumination is maintained.