Self-mixing inteferometry sensor module, electronic device and method of determining an optical power ratio for a self-mixing inteferometry sensor module

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United States of America

PATENT NO 11927441
APP PUB NO 20240060766A1
SERIAL NO

17821077

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Abstract

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A self-mixing interferometry sensor module, comprising a light emitter (LE), a detector unit (DU) and an optical element (OE), wherein the light emitter (LE) is operable to emit coherent electromagnetic radiation towards an external object (ET) to be placed outside the sensor module and undergo self-mixing interference, SMI, caused by reflections of the emitted electromagnetic radiation from the external object back inside the sensor module. The detector unit (DU) is operable to generate output signals indicative of an optical power output of the light emitter (LE) due to the SMI. The optical element (OE) is aligned with respect to the light emitter (LE) such that a first fraction of electromagnetic radiation is directed towards the external target (ET) or the light emitter (LE) and a second fraction of electromagnetic radiation is directed towards the detector unit (DU). An optical power ratio determined by the first and second fractions meets a pre-determined value.

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Patent Owner(s)

  • AMS INTERNATIONAL AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Najer, Daniel Rotkreuz, CH 2 1
Suarez, Ferran Chandler, US 35 123

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