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:
Jul. 26, 1988
Filed:
Jun. 04, 1987
Applicant:
Inventors:
Riccardo Calvani, Pino Torinese, IT;
Gianni Coppa, Torino, IT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
356 731 ;
Abstract
A constant force perpendicular to the fiber axis is applied to the fiber and is displaced step by step along the fiber axis. The state of polarization of a radiation outgoing from the fiber is determined at each step and the beat-length values are obtained from both the amplitude ratio and the phase difference between the components, along the two birefringence axes, of the electrical field associated with a radiation launched into the fiber.