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. 21, 2011
Filed:
Jan. 08, 2010
Axel Kramer, Wettingen, CH;
Frank Kassubek, Rheinfelden, DE;
Klaus Bohnert, Oberrohrdorf, CH;
Hubert Braendle, Oberengstringen, CH;
Axel Kramer, Wettingen, CH;
Frank Kassubek, Rheinfelden, DE;
Klaus Bohnert, Oberrohrdorf, CH;
Hubert Braendle, Oberengstringen, CH;
ABB Research Ltd, Zurich, CH;
Abstract
A pressure sensor is disclosed wherein pressure induced changes in birefringent properties of an optical sensing element are read out by transmission of at least one light beam. The pressure sensor can include at least one single-material transparent body which is subjected to at least two different pressures (p, p) in at least two different regions via at least two pressure chambers. The transparent body can transmit by a parallel or minimally divergent light beam without total reflection in the body such that the pressure-induced birefringence and a corresponding differential phase shift between linear polarisation components of the light beam depends on a difference of the different pressures (p, p).