Patent · US Active

Optical sensor

US9417147B2 · kind B2 · utility

4Cited by

4References

16Claims

0Family size

Assignee

XARION Laser Acoustics GmbH · AT

Inventors

Balthasar Fischer · Wien, AT
Friedrich Reining · Wien, AT
Ernst Wintner · Oberweiden, AT

Key dates

Filing date	May 16, 2012
Grant date	Aug 16, 2016
Priority date	—
Expiry date	Dec 21, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/216
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A device comprising measurement (7) and reference (3) interferometers is disclosed. Each interferometer is configured to receive light from the same light source (1) and to emit light to respective detectors (6) and has a respective operating point. The measurement interferometer (7) is configured to respond to variations in a physical parameter by varying the intensity of light emitted, whereas the reference interferometer (3) is configured to be unresponsive to variations in the physical parameter. The device further comprises a signal processor for generating a differential output signal depending on respective output signals generated by the detectors (6).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.