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. 29, 1991
Filed:
May. 02, 1990
Jean-Pierre Hazan, Sucy en Brie, FR;
Michel Steers, La Queue en Brie, FR;
Gilles Delmas, Epinay sous Senart, FR;
Jean-Louis Nagel, Limeil-Brevannes, FR;
U.S. Philips Corp., New York, NY (US);
Abstract
A detection device for measuring force and pressure is disclosed which includes a monomode optical fiber (1) into which polarized light is fed and, at the output of the fiber, is detected by a detection arrangement (4, 80, 81, 30, 40, 31, 41), which is sensitive to the polarization of the light. The detection arrangement is provided with means (30A, 31A) for analyzing the light according to at least two different polarization directions, forming an angle comprised between 30.degree. and 60.degree. between them. According to the invention, the device is provided with means (70, 71, 2) for feeding several non-correlated light signals, each polarized differently, into the input of the fiber, and with means (4) for distinguishing between the light signals in the said detection arrangement at the output of the fiber, which light signals have been fed into the input of the fiber. The invention is applied in intrusion detection, monitoring and security systems.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile