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. 09, 1991
Filed:
Nov. 06, 1989
Timothy A Skunes, Columbia Heights, MN (US);
Steven K Case, St. Louis Park, MN (US);
Jeffrey A Jalkio, St. Paul, MN (US);
CyberOptics Corporation, Minneapolis, MN (US);
Abstract
A laser based, noncontacting measurement instrument is particularly adapted for the printed circuit board drilling industry to measure drill diameter, runout, and tip position under actual operating conditions. A laser beam is focused in space and the amount of light occluded by the drill bit as the bit is passed through the beam is sensed by a detector. Diameter, runout, and tip position are calculated by measuring the amount of occlusion, monitoring the position and angular orientation of the rotating drill, and correlating the amount of light occlusion to the position and angular orientation of the drill. The instrument automatically compensates for dust and debris in the optical path.