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:
Jun. 02, 1992
Filed:
Aug. 24, 1990
Philippe Grosso, Lannion, FR;
Abstract
Method and device for the geometric characterization of transparent tubes. According to the invention, in order to characterize a transparent tube whose internal and external walls are approximately cylindrical and coaxial, the tube is placed in the air and scanned by an incident luminous beam moved parallel to it within a section plane perpendicular to the axis of the tube. Beams (F0, F1, F2, F3, F4) not deflected by the tube are detected. The detected beams, except for one which passes through the axis of the tube form two pairs. The distance between the two beams of each of these two pairs is determined, and, with the aid of these distances, the internal and external diameters of the tube at the level of the cutting plane are determined. Application for the geometric characterization of tubes for preforms for optical fibers.