Trumpf Photonic Components Gmbh

Robert Boschgmbh

Hans Spruit

Alexander Marc Van Der Lee

Thomas Alexander Schlebusch

Andreas Petersen

Jochen Hellmig

Johannes Meyer

Robert Weiss

Robert Wolf

Balazs Jatekos

Sören Sofke

Jens-Alrik Adrian

Stephan Gronenborn

Okke Ouweltjes

Stefan Weiss

Alexander Herrmann

Matthias Falk

Rico Srowik

Jeroen Dragt

Peter Jutte

Wolfram Johannes Martin Lyda

Pieter Hoeven

Dominik Moser

A laser sensor includes a laser source configured to emit a laser beam, and optics configured to project the laser beam as a one- or two-dimensional patterned laser beam onto an object to be examined, such that a distance of the patterned laser beam from the laser source varies along the patterned laser beam projected on the object. The laser sensor further includes a detector configured to determine a self-mixing interference signal generated by laser light of the patterned laser beam reflected from the object back into the laser source, and circuitry configured to analyze a spectrum of the self-mixing interference signal and extract from the spectrum of the self-mixing interference signal multiple frequencies that are indicative of at least one of the following: multiple distances along the patterned laser beam from the laser source, or multiple velocities along the patterned laser beam with respect to the laser source.

Laser sensor, system and method for self-mixing interferometry

An optical arrangement of data smart glasses includes a first laser device configured to emit a projection light beam, a second laser device configured to emit a measuring light beam, a first scanner, a second scanner, and a beam combiner configured to bundle the projection light beam and the measuring light beam into a common light beam, wherein the first scanner is configured to deflect the projection light beam emitted by the first laser device in a first axis, and wherein the second scanner is configured to deflect the common light beam focused by the beam combiner in a second axis.

Optical arrangement of smart glasses for scanning surface

A laser sensor module includes a first laser source configured to emit first modulated light, the first modulated light being modulated laser light. The laser sensor module further includes circuitry configured to drive the first laser source with a first modulated driving current to cause the first laser source to emit the modulated laser light, a detector configured to detect the modulated laser light, which induces a photocurrent with variations resulting from modulation of the modulated laser light, and a second laser source configured to emit second modulated light. The circuitry is further configured to drive the second laser source with a second modulated driving current to cause the second laser source to emit the second modulated light. The detector is configured to detect the second modulated light. The circuitry is configured to adapt the amplitude of the second modulated driving current to induce a contribution to the photocurrent.

Laser sensor module for self-mixing interferometry

The invention relates to an eye tracking arrangement that includes a camera configured to capture images of an eye at a first scanning rate, a laser velocimeter configured to capture an eye velocity of a movement of the eye by laser Doppler velocimetry at a second scanning rate and a control device configured to determine an absolute eye position based on the images, and track a gaze direction of the eye based on the absolute eye position and the eye velocity.

Eye-tracking arrangement

The invention relates to a method for detecting particles, having the steps of: receiving (S) a measurement signal; calculating (S) at least one estimated noise value using the received measurement signal; and detecting (S) the particles using the measurement signal on the basis of at least one detection criterion, wherein the at least one detection criterion depends on the at least one calculated estimated noise value.

Method and apparatus for detecting particles

The invention relates to a method for determining the absolute value of the flow velocity (v) of a particle-transporting medium. At least two measurement laser beams (L_i) with linearly independent, non-orthogonal measurement directions (b_i) are emitted. The measurement laser beams (L_i) scattered at particles are detected and one measurement signal (m_i) is generated in each case for each measurement laser beam (L_i). The measurement signals (m_i) are evaluated, wherein absolute values of velocity components (v_i) are ascertained as projections of the flow velocity (v) on the respective measurement directions (b_i), wherein a solid angle region is ascertained for the prevalent direction of the flow velocity (v) and signs assigned to this solid angle region are chosen for the individual velocity components (v_i), and wherein the absolute value of the flow velocity (v) is determined using the ascertained absolute values of the velocity components (v_i) and using the chosen signs for the velocity components (v_i).

Method and apparatus for determining the absolute value of the flow velocity of a particle-transporting medium

A method for operating smart glasses includes an input unit and/or output unit and a gaze detection arrangement, wherein the gaze detection arrangement detects any eye movement of an eye including the steps of irradiating at least one wavelength-modulated laser beam to the eye, detecting an optical path length of the emitted laser beam based on laser feedback interferometry of the emitted laser radiation with backscattered radiation from the eye, detecting a Doppler shift of the emitted and backscattered radiation based on the laser feedback interferometry, and detecting an eye velocity based on the Doppler shift, and wherein the input unit and/or output unit is operated based on the optical path length and/or the eye velocity.

Method for operating a pair of smart glasses

A method for detecting a gaze direction of an eye includes the steps of irradiating at least one wavelength-modulated laser beam onto an eye, detecting an optical path length of the emitted laser beam based on laser feedback interferometry of the emitted laser radiation with a backscattered radiation from the eye, detecting a Doppler shift of the emitted radiation and the backscattered radiation based on the laser feedback interferometry, detecting an eye velocity based on the Doppler shift, and detecting an eye movement of the eye based on the optical path length and the eye velocity.

Method for detecting a gaze direction of an eye

The invention relates to an optical lens () for a photodiode-equipped device, which is arrangeable at and/or in the photodiode-equipped device in such a way that light beams () emitted by at least two photodiodes of the photodiode-equipped device transmit into the optical lens () through a light entrance side (S) of the optical lens () and emerge from the optical lens () at a light exit side (S) of the optical lens (), and for which a central longitudinal axis () extending centrally through the light entrance side (S) and centrally through the light exit side (S) is definable, wherein the light entrance side (S) of the optical lens () and the light exit side (S) of the optical lens () are embodied in each case as a freeform surface for off-axis projection in such a way that the light beams () emitted by the photodiodes () arranged on a circular path around the central longitudinal axis () are focused off-axis by means of the optical lens ().

Optical lens for a photodiode-equipped device

An optical particle sensor device comprises an optical emitter device for emitting a multitude of measurement laser beams; a detector device for detecting the measurement laser beams scattered on particles in the vicinity of the optical particle sensor device and for generating a single measuring signal assigned to this for each measurement laser beam; and an evaluation device for determining at least one estimated particle value for the number of particles per volume using at least one single measurement signal, wherein the evaluation device determines at least two estimated particle values for the number of particles per volume, which are based on at least partially different single measurement signals and/or a different number of single measurement signals, and on the basis of at least part of the estimated particle values, determines at least one output value for the particle load.

Optical particle sensor device and method for operating an optical particle sensor device

A system for determining a particle contamination and a method for determining a particle contamination in a measurement environment is provided in which individual particles in the measurement environment are detected (S), wherein a) an estimate of the number of particles per volume in the measurement environment is ascertained (S), b) an estimate of the number of particles per volume and characterization information describing the particle source in the measurement information are taken as a basis for ascertaining an output value for the particle contamination in the measurement environment (S), and c) context-related data are made available and the characterization information is estimated on the basis of the available context-related data (S). The estimation of the characterization information on the basis of the available context-related data avoids the conventional restriction of the evaluable characterization information to firmly prescribed information and instead provides flexible adaptation of the characterization information to be evaluated to the context-related data.

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Waalre, Netherlands

Hans Spruit