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:
Jul. 04, 2023
Filed:
Jun. 07, 2019
Philips Photonics Gmbh, Ulm, DE;
Johannes Hendrikus Maria Spruit, Eindhoven, NL;
Alexander Marc Van Der Lee, Eindhoven, NL;
Petrus Theodorus Jutte, Eindhoven, NL;
Holger Joachim Moench, Eindhoven, NL;
Joachim Wilhelm Hellmig, Eindhoven, NL;
Roy Ovink, Eindhoven, NL;
TRUMPF PHOTONIC COMPONENTS GMBH, Ulm, DE;
Abstract
A laser sensor module for detecting a particle density of small particles with a particle size between 0.05 μm and 10 μm includes a first laser configured to emit a first measurement beam, a second laser configured to emit a second measurement beam, and an optical arrangement configured to focus the first measurement beam to a first measurement volume and to focus the second measurement beam to a second measurement volume. The optical arrangement includes a first numerical aperture and a second numerical aperture arranged to detect a predetermined minimum particle size. The laser sensor module further includes a first detector configured to determine a first self-mixing interference signal of a first optical wave, a second detector configured to determine a second self-mixing interference signal of a second optical wave, and an evaluator.