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:
Sep. 13, 2022
Filed:
Dec. 18, 2020
Trumpf Photonic Components Gmbh, Ulm, DE;
Robert Bosch Gmbh, Stuttgart, DE;
Petrus Theodorus Jutte, Eindhoven, NL;
Okke Ouweltjes, Eindhoven, NL;
Soren Sofke, Reutlingen, DE;
Johannes Hendrikus Maria Spruit, Ulm, DE;
TRUMPF PHOTONIC COMPONENTS GMBH, Ulm, DE;
ROBERT BOSCH GMBH, Stuttgart, DE;
Abstract
A laser sensor module measures a particle density of particles with a size of less than 20 μm. The laser sensor module includes: a laser configured to emit a laser beam; a detector; and an optical arrangement. The optical arrangement is configured to focus the laser beam to a focus region. The laser is configured to emit the laser beam through the optical arrangement to the focus region. The optical arrangement has an emission window. The detector is configured to determine an interference signal of an interference of reflected laser light with emitted later light of the laser beam. The laser sensor module is configured to provide an indication signal of a soiling of the emission window based on the interference signal determined during a mechanical excitation of the emission window.