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:
Aug. 06, 2024
Filed:
Dec. 21, 2020
Robert Bosch Gmbh, Stuttgart, DE;
Trumpf Photonic Components Gmbh, Ulm, DE;
Hans Spruit, Ulm, DE;
Alexander Van der Lee, Ulm, DE;
Philipp Henning Gerlach, Ulm, DE;
Robert Wolf, Reutlingen, DE;
Robert Weiss, Reutlingen, DE;
Matthias Falk, Reutlingen, DE;
ROBERT BOSCH GMBH, Stuttgart, DE;
TRUMPF PHOTONIC COMPONENTS GMBH, Ulm, DE;
Abstract
A method reduces false-positive particle counts detected by an interference particle sensor module, which has a laser and a light detector. The method including: emitting laser light; providing a high-frequency signal during the emission of the laser light, a modulation frequency of the high-frequency signal being between 10-500 MHz; detecting an optical response by the light detector in reaction to the emitted laser light while providing the high-frequency signal, which is arranged such that a detection signal caused by a macroscopic object positioned between a first and second distance is reduced in comparison to a detection signal caused by the macroscopic object at the same position without providing the high-frequency signal. The high-frequency signal is provided to a tuning structure of the particle sensor module which is arranged to modify a resonance frequency of an optical resonator comprised by the laser sensor module upon reception of the high-frequency signal.