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. 04, 1988
Filed:
Oct. 01, 1986
Lawrence A Johnson, Plymouth, MN (US);
Rosemount Inc., Eden Prairie, MN (US);
Abstract
An optical sensor for providing an output signal representative of a sensed parameter such as pressure or temperature which includes an input/output optical waveguide and an optical resonator. The input/output waveguide is coupled to the resonator so that a significant change in light intensity at the output of the input/output waveguide occurs at resonance of the optical resonator. The optical resonator exhibits first and second independent resonant modes which differ from one another as a function of the parameter to be sensed. A narrow bandwidth variable frequency light source provides a frequency swept light beam to the input/output waveguide, and one or more photodetectors sense the intensity of the light beam at the output of the input/output waveguide to produce an output signal representative of the parameter based upon the time difference between occurrence of the first and second resonant modes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile