Abstract: The invention relates to an optical lens (10) for a photodiode-equipped device, which is arrangeable at and/or in the photodiode-equipped device in such a way that light beams (14) emitted by at least two photodiodes of the photodiode-equipped device transmit into the optical lens (10) through a light entrance side (S1) of the optical lens (10) and emerge from the optical lens (10) at a light exit side (S2) of the optical lens (10), and for which a central longitudinal axis (16) extending centrally through the light entrance side (S1) and centrally through the light exit side (S2) is definable, wherein the light entrance side (S1) of the optical lens (10) and the light exit side (S2) of the optical lens (10) are embodied in each case as a freeform surface for off-axis projection in such a way that the light beams (14) emitted by the photodiodes (32) arranged on a circular path around the central longitudinal axis (16) are focused off-axis by means of the optical lens (10).

Abstract: A device includes a housing with a first transparent cover (16) which forms at least a partial area of a first housing wall (18), a printed circuit board (20) arranged in the housing with a functional side (22), and at least one the light-emitting device (24a-24c) arranged on the functional side (22). The first transparent cover (16) is inclined at an angle to the functional side (22) of the printed circuit board (20) and/or to the side directed away from the functional side of the printed circuit board (20), and wherein at least one reflector (26) having a reflective surface (28) is arranged in the housing in such a way that the light emitted by the at least one light-emitting device (24a to 24c) and deflected by means of the at least one reflective surface (28, 42) of the at least one reflector (26, 40) at least partly impinges on the first transparent cover (16) and is at least partly transmitted through the first transparent cover (16).

Abstract: A light-emitting unit, comprising a substrate and a light-emitting device, which is situated on the substrate (2) and is designed to emit a laser beam. A swiveling light-deflecting device is situated on the substrate. A capping device is situated on the substrate and covers the light-emitting device and the light-deflecting device, the capping device having a first cap section and a transparent second cap section. The first cap section is designed to redirect the laser beam emitted by the light-emitting device onto the light-deflecting device. The light-deflecting device is designed to deflect the redirected laser beam in such a way that deflected laser beam is able to exit through second cap section.

Abstract: 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 (S1), wherein a) an estimate of the number of particles per volume in the measurement environment is ascertained (S2), 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 (S3), and c) context-related data are made available and the characterization information is estimated on the basis of the available context-related data (S4).

Abstract: 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 (S1), wherein a) an estimate of the number of particles per volume in the measurement environment is ascertained (S2), 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 (S3), and c) context-related data are made available and the characterization information is estimated on the basis of the available context-related data (S4).

Abstract: A particle sensor that includes a first laser Doppler sensor and at least a second laser Doppler sensor, as well as a control unit that is configured to carry out self-interference measurements with the first laser Doppler sensor and simultaneously with at least the second laser Doppler sensor.

Abstract: The invention relates to an optical lens (10) for a photodiode-equipped device, which is arrangeable at and/or in the photodiode-equipped device in such a way that light beams (14) emitted by at least two photodiodes of the photodiode-equipped device transmit into the optical lens (10) through a light entrance side (S1) of the optical lens (10) and emerge from the optical lens (10) at a light exit side (S2) of the optical lens (10), and for which a central longitudinal axis (16) extending centrally through the light entrance side (S1) and centrally through the light exit side (S2) is definable, wherein the light entrance side (S1) of the optical lens (10) and the light exit side (S2) of the optical lens (10) are embodied in each case as a freeform surface for off-axis projection in such a way that the light beams (14) emitted by the photodiodes (32) arranged on a circular path around the central longitudinal axis (16) are focused off-axis by means of the optical lens (10).

Abstract: A device for ascertaining the orientation of a drill relative to a plane, the device being capable of being connected to the drill, the device having a laser distance measuring unit by which, from a prespecified position relative to the plane, a first distance to a first point in the plane and a second distance to a second point in the plane can be measured, and having an evaluation unit that is configured such that on the basis of the first distance and the second distance the orientation of the device relative to the plane can be ascertained.

Abstract: A device includes a housing with a first transparent cover (16) which forms at least a partial area of a first housing wall (18), a printed circuit board (20) arranged in the housing with a functional side (22), and at least one the light-emitting device (24a-24c) arranged on the functional side (22). The first transparent cover (16) is inclined at an angle to the functional side (22) of the printed circuit board (20) and/or to the side directed away from the functional side of the printed circuit board (20), and wherein at least one reflector (26) having a reflective surface (28) is arranged in the housing in such a way that the light emitted by the at least one light-emitting device (24a to 24c) and deflected by means of the at least one reflective surface (28, 42) of the at least one reflector (26, 40) at least partly impinges on the first transparent cover (16) and is at least partly transmitted through the first transparent cover (16).

Abstract: A light-emitting unit, comprising a substrate and a light-emitting device, which is situated on the substrate (2) and is designed to emit a laser beam. A swiveling light-deflecting device is situated on the substrate. A capping device is situated on the substrate and covers the light-emitting device and the light-deflecting device, the capping device having a first cap section and a transparent second cap section. The first cap section is designed to redirect the laser beam emitted by the light-emitting device onto the light-deflecting device. The light-deflecting device is designed to deflect the redirected laser beam in such a way that deflected laser beam is able to exit through second cap section.

Abstract: A control system for a treadmill including a control unit and a laser distance sensor, the laser distance sensor being configured to determine the distance and/or the movement of a user relative to the laser distance sensor with the aid of a laser beam, the control unit being configured to control a movement of the treadmill as a function of measuring data of the laser distance sensor. A treadmill including such a control system is also described.

Abstract: A device for ascertaining the orientation of a drill relative to a plane, the device being capable of being connected to the drill, the device having a laser distance measuring unit by which, from a prespecified position relative to the plane, a first distance to a first point in the plane and a second distance to a second point in the plane can be measured, and having an evaluation unit that is configured such that on the basis of the first distance and the second distance the orientation of the device relative to the plane can be ascertained.

Abstract: A control system for a treadmill including a control unit and a laser distance sensor, the laser distance sensor being configured to determine the distance and/or the movement of a user relative to the laser distance sensor with the aid of a laser beam, the control unit being configured to control a movement of the treadmill as a function of measuring data of the laser distance sensor. A treadmill including such a control system is also described.