Patent · US Active

Laser sensor module with indication of readiness for use

US11441998B2 · kind B2 · utility

0Cited by

1References

15Claims

0Family size

Assignees

TRUMPF PHOTONIC COMPONENTS GMBH · DE
Robert Bosch GmbH · DE

Inventors

Petrus Theodorus Jutte · Ulm, DE
Okke Ouweltjes · Veldhoven, NL
Soren Sofke · Reutlingen, DE
Johannes Hendrikus Maria Spruit · Eindhoven, NL

Key dates

Filing date	Dec 18, 2020
Grant date	Sep 13, 2022
Priority date	—
Expiry date	Dec 18, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01N2021/157
WIPO fieldMeasurement
WIPO sectorInstruments

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.

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