Abstract: A method for tracking moving particles in a fluid. The method includes illuminating the moving particles with an illumination sequence of patterns generated by a light projector; measuring with a single camera light intensities reflected by the moving particles; calculating, based on the measured light intensity, digital coordinates (x?, y?, z?) of the moving particles; determining a mapping function f that maps the digital coordinates (x?, y?, z?) of the moving particles to physical coordinates (x, y, z) of the moving particles; and calculating the physical coordinates (x, y, z) of the moving particles based on the mapping function f. The illumination sequence of patterns is generated with a single wavelength, and light emitted by the projector is perpendicular to light received by the single camera.

Abstract: A spectroscopy device includes an incoherent light source, tunable to a predetermined emission wavelength; a microscope platform comprising a microscope objective comprising a deep-UV optimized objective and a focal plane defined thereon; a notch filter having an absorption frequency matched to the emission wavelength; and a frequency-selective optical path from the wide-field UV light source to the microscope platform onto the focal plane and from the focal plane through the notch filter.

Abstract: A LiDAR system includes an optical subsystem with an optical axis. The optical subsystem includes an optical source to emit an optical beam, a first optical lens to transmit the optical beam, an optical window to reflect a first portion of the optical beam to generate a LO signal, an optical scanner to transmit a second portion of the optical beam to a target to scan the target to generate a target return signal, a second optical lens to transmit the LO signal and the target return signal to a PD, and the PD to mix the target return signal with the LO signal to extract range and velocity information. The LO signal is disposed to be decentered from the optical axis on the second optical lens to increase a percentage of an overlap of the LO signal and the target return signal on a detection plane of the PD.

Abstract: The present invention provides a sensor and an illumination lamp with the sensor. The illumination lamp with the sensor includes an illumination lamp, a sensor mounting base disposed in the illumination lamp, a sensor electrically connected to the sensor mounting base in a plug-in manner by telescopic conductive pins. A sensing module disposed in the sensor generates a corresponding electrical signal after detecting a triggering signal, to control the lamp on or off. The illumination lamp with the sensor is artistic and practical, without external wiring, complicated mounting steps and wiring connection. Meanwhile, different functional modules, such as a microwave sensing module, an infrared sensing module, a light sensing module, a Bluetooth control module, a WIFI control module, an Internet control module, a smoke sensing module, a fire sensing module and a security monitoring module with special purposes can be selectively mounted in the sensor to realize corresponding functions.

Abstract: A target acquisition system includes a transmitter configured to emit a plurality of pulses at a plurality of transmit times toward a target, a receiver configured to detect a plurality of photon arrival events at a plurality of receive times, and a processor configured to determine a range of the target and a range-rate of the target by identifying a subset of the receive times and a subset of the transmit times, generating scaled transmit times based on the subset of the transmit times and a plurality of trial target velocities relative to the receiver, cross-correlating the scaled transmit times and the subset of the received times to generate a plurality of cross-correlation power values, and calculating the range and the range-rate of the target based on the plurality of cross-correlation power values.

Abstract: A system for generating an automatically segmented and annotated two-dimensional (2D) map of an environment includes processors coupled to a scanner to convert a 2D map from the scanner into a 2D image. Further, a mapping system categorizes a first set of pixels from the image into one of room-inside, room-outside, and noise by applying a trained neural network to the image. The mapping system further categorizes a first subset of pixels from the first set of pixels based on a room type if the first subset of pixels is categorized as room-inside. The mapping system also determines the room type of a second subset of pixels from the first set of pixels based on the first subset of pixels by using a flooding algorithm. The mapping system further annotates a portion of the 2D map to identify the room type based on the pixels corresponding to the portion.

Abstract: This fluid measuring device is provided with: an irradiation unit that irradiates a fluid with light; a light receiving unit that receives light scattered by the fluid; a detecting unit that detects a backflow of the fluid on the basis of a light reception signal from the light receiving unit; and a calculating unit that calculates, on the basis of the detection result by the detection unit and the light reception signal from the light receiving unit, estimated fluid information indicating the flow rate or flow speed of the fluid. Accordingly, even when a backflow of the fluid temporarily occurs, the flow speed of the fluid can be precisely measured.

Abstract: An air data sensor can include an acoustic transmitter configured to output an acoustic signal into an airflow and a plurality of acoustic transducers configured to receive the acoustic signal output by the acoustic transducer. The air data sensor can also include a light source configured to output a light beam into the airflow, and a light receiver configured to receive scattered light from the light beam. The light source and the light receiver can be bistatic such that a measurement zone is formed away from the air data sensor.

Abstract: Sensing apparatus includes a transparent window and a LiDAR assembly, including a beam source, which is configured to emit one or more beams of optical radiation along a beam axis, and which is configured to scan the one or more beams over an angular range about the beam axis. A diffractive structure is mounted approximately parallel to the transparent window and positioned to intercept the one or more beams emitted by the LiDAR assembly and turn the beam axis to pass through the transparent window at an angle greater than 30° relative to a normal to a surface of the transparent window.

Abstract: A gas component measuring device includes: a cyclone including a gas inlet; and a laser gas analyzer configured to take, in the cyclone, a measurement of a component of a subject gas that contains particulate matter and is introduced into the cyclone through the gas inlet.

Abstract: A system for determining airborne light detection and ranging (lidar) installation angles includes an airborne platform, a light detection and ranging (lidar) apparatus, a navigation system and a processor. The airborne platform performs a calibration flight in an orbit. The lidar apparatus is installed on the airborne platform for wind-velocity measurement. The navigation system is on board the airborne platform and measures motion data associated with movements of the airborne platform and generates a navigation signal. The processor determines in real time one or more installation angles of the lidar apparatus on the airborne platform to improve accuracy of the wind-velocity measurement.

Abstract: An imaging system (200) including a phase-modulating element (202) configured and arranged with optics (100) in an imaging path (300) of the imaging system, to modulate light emitted from an object (150), while the object is in motion with respect to the imaging system, to create a modified point-spread function (PSF); and a processor (700) configured and arranged to generate, on an image plane (500) of the imaging system, a three-dimensional image from the modulated light to provide depth-based characteristics of the object. Other applications are also described.

Abstract: A tool control system may include: a tactile sensor configured to, when a tool holds a target object and slides the target object downward across the tool, obtain tactile sensing data from the tool; one or more memories configured to store a target velocity and computer-readable instructions; and one or more processors configured execute the computer-readable instructions to: receive the tactile sensing data from the tactile sensor; estimate a velocity of the target object based on the tactile sensing data, by using one or more neural networks that are trained based on a training image of an sample object captured while the sample object is sliding down; and generate a control parameter of the tool based on the estimated velocity and the target velocity.

Abstract: A light detection and ranging (LIDAR) apparatus is provided that includes an optical source to emit an optical beam towards a target. The LIDAR apparatus further includes a mode field expander operatively coupled to the optical source to expand a mode area of the optical beam.

Abstract: In one embodiment, a waveguide is added to the LiDAR sensor that redirects some of a received target return laser beam to a first stage photodetector and amplifier. When the amplitude of the target return laser beam is high enough to oversaturate the amplifier, an electric current is generated by the amplifier and received by a tunable coupler. As the tunable coupler heats up due to the electric current, it redirects energy from the return target laser beam to a beam dump. The reduced return target laser beam is then received by a photodetector or RF amplifier and is used to calculate the distance between the LiDAR sensor and object that reflected the received target return laser beam. In addition, rather than redirect the energy to a beam dump, the energy may be redirected to another photodetector or amplifier and may be used to supplement the distance calculation.

Abstract: An information processing apparatus includes a display panel, and a ToF sensor emitting light through the display panel, in which the display panel includes a glass, and an AF layer (a water-repellent layer) having water-repellency, formed in an area other than a certain area including a passing area of light emitted from the ToF sensor on a surface of the glass opposite to a surface facing the ToF sensor.

Abstract: A keyless synthesizer t can stimulate all three senses (hearing, muscle movement and visual) at once in patients born with C.H.A.R.G.E. syndrome while they play and, at the same time, enjoy and have fun with the device. A keyless synthesizer operational by a single hand of the user includes an ultrasound range sensor responsive to the distance “d” of a user's hand from the sensor for generating a sensor signal corresponding to the distance “d”. A programmable microcontroller programmed to convert the sensor signal to one of a plurality of discrete signals. A synthesizer is responsive to each discrete signal for generating a discrete tone. A multi-color generator is responsive to each discrete signal for generating a discrete color so that for each discrete signal corresponding to a distance “d” both a discreet tone and an associated discreet color are generated.

Abstract: An optical device creates 3D images comprising a field of points, each point comprising horizontal, vertical, and distance metrics. The device comprises an illumination subsystem, comprising light sources, such as LEDs, a non-resonant beam steering element such as a micro-electro-mechanical system (MEMs) mirror, beam-shaping optics, a beam director plate, and a diffuser. The device also comprises an imaging subsystem with one or more optical detector chips that measure time-of-flight (TOF). Devices may dynamically and sequentially images solid-angle sub-regions of interest, in an arbitrary order, out of a total FOV, using eye-safe illumination. The corresponding received image portions are stitched together. The beam steering element is non-resonant, allowing arbitrary and rapid changes to its pointing vector. Beam shaping optics generates rectangular solid-angle illumination. One detector chip integrates light from one sub-region while another chip is reads out image data.

Abstract: A method and system for positioning of autonomously operating entities are disclosed. A positioning system receives a current location of an entity capable of autonomous operation and generates a 3D virtual construct by splitting a spatial volume associated with the current location into a plurality of voxels. The positioning system receives spatial data corresponding to the current location generated by at least one sensor associated with the entity and determines an occupancy status of one or more voxels using the spatial data. A voxel map is configured from the 3D virtual construct based on the occupancy status of the one or more voxels. The positioning system generates a 3D map by overlaying visual semantic data onto the voxel map. The visual semantic data is derived from image frames corresponding to the current location captured by one or more imaging devices. The 3D map is capable of autonomously positioning the entity.

Abstract: A position estimating device is provided with an image acquiring unit that acquires images around a moving body, a moving body movement amount estimating unit that estimates an amount of movement of the moving body based on the images, and a moving body position estimating unit that estimates the position of the moving body based on the estimated amount of movement. The moving body movement amount estimating unit includes a tracking unit that tracks a first feature point to a second feature point, a distance calculating unit that calculates the distance from the moving body to the second feature point, an azimuth estimating unit that estimates the azimuth of the moving body based on the distance from the moving body to the second feature point, and a movement amount estimating unit which estimates the amount of movement of the moving body based on the azimuth of the moving body.

Abstract: The present application provides a volumetric measuring method and apparatus based on a TOF depth camera, which is achieved by: acquiring depth images; denoising the depth images; selecting a first feature area of the first depth image and a second feature area of the second depth image that have been denoised respectively, traversing each pixel point in the first feature area at multiple traversal speeds, and matching a first depth value of a current pixel point with a second depth value of a target pixel point corresponding to the current pixel point in the second feature area to acquire multiple total similarity values; determining a traversal speed corresponding to a maximum total similarity value as an instantaneous speed at a current moment; calculating a package volume according to the instantaneous speed. The present application effectively solves the problem that an accurate package volume cannot be obtained when a speed of the conveyor belt is not fixed, and high in feasibility.

Abstract: A system and method for performing speckle correlation flow cytometry (SCFC). By subtracting out the stationary background when shining light through a sample (e.g., a vessel within a biological tissue), light only scattered by the desired targets (e.g., cells) can be captured and different types of targets (e.g., cells) can be distinguished by the autocorrelation of the speckle pattern. In this way, the targets (e.g., cells) can be classified and counted based on the features of their speckle correlations. The technique can be applied not only for noninvasive, label-free, in vivo CTC counting but also for counting other types of blood cells such as white blood cells or red blood cells.

Abstract: A light detection and ranging (LIDAR) system uses optical sources to emit a continuous-wave (CW) optical beam and a frequency-modulated (FMCW) optical beam. A first set off optical components is coupled with the optical sources to generate a CW local oscillator (LO) signal from the CW optical beam, to generate an FMCW LO signal from the FMCW optical beam, and to combine the CW optical beam and the FMCW optical beam into a combined optical beam. A second set of optical components is coupled with the first set of optical components, to transmit the combined optical beam toward a target environment and to receive a target return signal from the target environment. A third set of optical components is coupled with the second set of optical components, to generate and detect a target velocity component of the target return signal and a target range component of the target return signal.

Abstract: A debris detection system includes a chamber configured to permit particles to pass through the chamber; an optical fiber or fiber optic cable providing a light path; a collimator configured to channel light from the light path into the chamber; and a reflector configured to reflect light back to the collimator for signal detection. In embodiments, the reflector may include a mirror. Methods for detecting particles and information and/or parameters associated with particles, including that associated with reflected light, are disclosed.

Abstract: A thermal flow sensor is provide for beverage metering using a heater in physical and thermal communication the beverage dispensing conduit. A temperature sensing element is positioned distant from and downstream from said heater along said direction of fluid flow. A computing device controls the heater and the temperature sensing element and computes a cumulative total volume during a metering cycle. The computing of a cumulative total volume during a metering cycle may be adapted or approximated to account for residual changes in temperature of the conduit or thermal sensing element metering cycles. Flow measurement is thereby without direct physical contact with the beverage itself, thereby providing cleanable fluid paths within the beverage conduit that limits or eliminate voids or trapped volumes. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: A debris detection system includes a chamber configured to permit particles to pass through the chamber; an optical fiber or fiber optic cable providing a light path; a collimator configured to channel light from the light path into the chamber; and a reflector configured to reflect light back to the collimator for signal detection. In embodiments, the reflector may include a mirror. Methods for detecting particles and information and/or parameters associated with particles, including that associated with reflected light, are disclosed.

Abstract: The flow rate of light scattering fluid is measured more easily and at a higher speed. A flow rate measuring method according to the present disclosure includes: generating two or more speckle images by continually imaging light scattering fluid to be measured, while defining time shorter than spatial correlation disappearance time corresponding to time in which spatial correlation between speckle patterns generated by the light scattering fluid disappears as exposure time, at a time interval shorter than the spatial correlation disappearance time; and calculating direction and speed of flow of the light scattering fluid from time variation of the speckle patterns between the two or more speckle images, in which the speckle images are imaged by using an imaging device mounted with an area sensor and a pixel group of a part of the area sensor or by using an imaging device mounted with a line sensor.

Abstract: Through discrimination of the scattered signal polarization state, a lidar system measures a distance through semi-transparent media by the reception of single or multiple scattered signals from a scattering medium. Combined and overlapped single or multiple scattered light signals from the medium can be separated by exploiting varying polarization characteristics. This removes the traditional laser and detector pulse width limitations that determine the system's operational bandwidth, translating relative depth measurements into the conditions of two surface timing measurements and achieving sub-pulse width resolution.

Abstract: If a controller determines the calculation of a measured vehicle body velocity is possible, the controller calculates the measured vehicle body velocity as an estimated vehicle body velocity to conduct update processing for a K table and an AB table. If the controller determines the calculation of the measured vehicle body velocity is impossible, the controller extracts a conversion coefficient from the K table based on a detected running state while extracting a sensitivity coefficient and an offset coefficient from the AB table based on the temperature by a temperature sensor. The vehicle mounted apparatus calculates an axle pulse-based vehicle body velocity from the extracted conversion coefficient while calculating an acceleration-based vehicle body velocity from the extracted sensitivity coefficient and offset coefficient.

Abstract: A detection system for a vehicle in an environment has a reflective member positioned along an x-y plane for rotation around a rotational axis orthogonal to the x-y plane. The reflective member has a plurality of reflective sides, each of the reflective sides sloping towards the rotational axis at a slope angle different than the slope angle of at least one of the others of the reflective sides. At least one detector is positioned offset from the rotational axis and the x-y plane, an active side of the plurality of reflective sides positioned to provide a field of view between the detector and the environment. An actuator is configured to rotate the reflective member around the rotational axis to change the active reflective side to a different one of the plurality of reflective sides.

Abstract: A multi-angle imager (10) comprises an imaging array (Mij) configured to receive light beams (Li) via one or more entrance pupils (A1) according to distinct fields of view (Vi) of an object (P0) along each of multiple entry angles (?i). The imaging array (Mij) comprises multiple imaging branches (M1j, M2j) configured to form respective optical paths for the light beams (L1, L2) through the imager (10) for imaging respective subsections (S1, S2) of the object (P0). Each imaging branch (M1j) comprises a distinct set of optical elements (M11, M21) configured to receive the respective light beam (L1) along the respective entry angle (?1) and redirect the respective light beam (L1) towards the imaging plane (P1). The light beams (L1, L2) from each of the multiple imaging branches (M1j, M2j) are redirected to travel in a common direction (y) between the imaging array (Mij) and the imaging plane (P1).

Abstract: A laser sensor for detecting a particle density includes: a laser configured to emit a measurement beam, an optical arrangement being arranged to focus the measurement beam to a measurement volume, the optical arrangement having a numerical aperture with respect to the measurement beam, a detector configured to determine a self-mixing interference signal of a optical wave within a laser cavity of the laser, and an evaluator. The evaluator is configured to: receive detection signals generated by the detector in reaction to the determined self-mixing interference signal, determine an average transition time of particles passing the measurement volume in a predetermined time period based on a duration of the self-mixing interference signals generated by the particles, determine a number of particles based on the self-mixing interference signals in the predetermined time period, and determine the particle density based on the average transition time and the number of particles.

Abstract: An example LIDAR system includes a detector, an amplifier, a time-to-digital converter (TDC), an integrator, an analog-to-digital converter (ADC), and a processor. The detector is configured to receive a reflected light pulse, where the reflected light pulse is reflected off of an object. The amplifier is coupled to the detector to generate an analog signal in response to the reflected light pulse. The TDC is coupled to the amplifier to generate a first time data and a second time data in response to the analog signal. The integrator is coupled to the amplifier to integrate the analog signal. The ADC is coupled to the integrator to sample an output of the integrator and to generate a digital sample. The processor is configured to process the first time data, the second time data, and the digital sample to estimate a total reflected energy of the reflected light pulse.

Abstract: In conventional laser radar systems, the wind velocity measurement accuracy cannot be improved without changing their time gate widths, which is a problem. A laser radar system according to the present invention includes: an optical oscillator to perform laser light oscillation; an optical modulator to modulate the laser light by oscillation of the optical oscillator; an optical antenna to emit the laser light modulated by the optical modulator into the atmosphere and to receive scattered light from an irradiated target as reception light; an optical receiver to perform heterodyne detection on the reception light received by the optical antenna; and a signal processor to calculate a spectrum of a reception signal obtained by the optical receiver's performing heterodyne detection, to decompose the spectrum using signal-to-noise ratios, and to calculate a velocity of an irradiated target from a decomposed spectrum.

Abstract: A portable electronic device is operable in a particulate matter concentration mode where the portable electronic device uses a self-mixing interferometry sensor to emit a beam of coherent light from an optical resonant cavity, receive a reflection or backscatter of the beam into the optical resonant cavity, produce a self-mixing signal resulting from a reflection or backscatter of the beam of coherent light, and determine a particle velocity and/or particulate matter concentration using the self-mixing signal. The portable electronic device is also operable in an absolute distance mode where the portable electronic device determines whether or not an absolute distance determined using the self-mixing signal is outside or within a particulate sensing volume associated with the beam of coherent light. If not, the portable electronic device may determine a contamination and/or obstruction is present that may result in inaccurate particle velocity and/or particulate matter concentration determination.

Abstract: This invention provides technology that can provide a driver with an opportunity to decide whether or not to continue automatic drive control. A cancel point management system includes a cancel point collector that collects first notification information, indicating a manual cancel point which is a point where automatic drive control has been cancelled in response to operation by a driver in a notification vehicle, from the notification vehicle and a guide information distributer that distributes first guide information for showing the manual cancel point to a guide vehicle traveling on a road.

Abstract: A vehicle includes a liftgate system for mitigating a liftgate from contacting an object within a closing path of the liftgate. The liftgate system includes the liftgate, a camera, and a processor. The liftgate includes a surface facing an interior of the vehicle when the liftgate is closed. The camera is disposed on the surface. The processor detects, via the camera, an object within a closing path of the liftgate. The processors estimate a trajectory of the object when the object is in motion. The processor controls the liftgate based on the estimated trajectory and a speed setting at which the liftgate closes.

Abstract: A micro-fluidic device is described. The micro-fluidic device includes a semiconductor substrate; at least one micro-reactor in the semiconductor substrate; one or more micro-fluidic channels in the semiconductor substrate, connected to the at least one micro-reactor; a cover layer bonded to the semiconductor substrate for sealing the one or more micro-fluidic channels; and at least one through-substrate trench surrounding the at least one micro-reactor and the one or more micro-fluidic channels.

Abstract: The invention is related to a laser diode based multiple beam laser spot imaging system for characterization of vehicle dynamics. A laser diode based, preferably VCSEL based laser imaging system is utilized to characterize the vehicle dynamics. One or more laser beams are directed to the road surface. A compact imaging system including an imaging matrix sensor such as a CCD or CMOS camera measures locations or separations of individual laser spots. Loading status of vehicles and vehicles' pitch and roll angle can be characterized by analyzing the change of laser spot locations or separations.

Abstract: An optical orbital angular momentum (OAM) encoding system includes an optical source configured to generate a source light, an optical OAM encoder configured to encode the source light based on OAM modes to generate an encoded light, and an optical unit configured to direct the encoded light to a target.

Abstract: A system for measuring the distance of an obstacle, in which an optical flow is measured radially while rotating along a circle in a plane intersecting the obstacle; and the distance of the obstacle is determined according to the amplitude of the optical flow, the radius of the circle, and the speed of rotation.

Abstract: A reflective laser-based particle detector for detecting contamination particles moving through a vacuum. Laser light is directed through a vacuum access window in the containment vessel and toward a reflective surface on an inner surface opposite the window. A photonic detector is positioned to monitor reflected laser from the opposite inner surface inside the vessel and is capable of detecting perturbations of the reflected light. The system makes use of optical interferometry techniques embodied as a photonic integrated circuit to detect the particles. The reflective laser-based system can be placed entirely outside the vacuum thereby avoiding the need for breaking the vacuum environment to check for accumulation of contaminant particles.

Abstract: Disclosed are an experience-oriented virtual baseball game apparatus that enables a user to practice baseball or play a baseball game with a virtual player in a virtual baseball image projected on a screen based on the virtual baseball image, configured such that the user experiences a very interesting war of nerves between a pitcher and a batter, for example, the user pitches a ball toward the screen in order to induce a virtual batter in the image to ground out or to fly out through the location of his/her pitch or the virtual batter makes a hit or hits a home run due to a careless pitch of the user, through the baseball game, and a virtual baseball game control method using the same.

Abstract: Embodiments include apparatus and methods for generating a localization geometry or occupancy grid for a geographic location. Point cloud that describes a vicinity of a pathway is collected by a distance sensor and describing a vicinity of the pathway. The point cloud data is reduced or filtered to a predetermined volume with respect to the roadway. The remaining point cloud data is projected onto a two-dimensional plane including at least one pixel formation. A volumetric grid is defined according to the at least one pixel formation, and a voxel occupancy for each of a voxels forming the volumetric grid is determined. The arrangement of the voxel occupancies or a sequence of data describing the voxel occupancies is a localization geometry that describes the geographic location of the pathway.

Abstract: An optical system for providing crosswind aim point correction for a sniper rifles and similar weapons comprising an optical transmitter, an optical receiver, a display device and a processor. The optical transmitter produces a collimated laser beam for illuminating a spot on the target. The optical receiver receives optical signals transmitted by the optical transmitter and scattered back from the target and converts the optical signals into time varying electrical signals. The processor processes the time varying electrical signals to determine a path weighted average crosswind. The processor is equipped with software that permits it to calculate the path-weighted average crosswind utilizing at least three different methods.

Abstract: An improved ground collision avoidance system and method is provided for aircraft driven during ground operations by electric taxi drive systems. One or more monitoring devices employing scanning LiDAR technology may be mounted in exterior locations on or near aircraft landing gears or aerodynamically in locations on the aircraft fuselage selected to generate panoramic three-dimensional images from any point of view within or without the aircraft as the aircraft is driven independently within an airport ramp area. The point of view images are transmitted in real time to displays in the aircraft cockpit and may be transmitted to displays outside and remote from the aircraft, allowing the pilot and airport personnel to monitor the aircraft moving within the ramp environment and to respond quickly to control the aircraft's electric taxi drive system-powered ground travel to avoid and prevent a potential collision.

Abstract: An optoelectronic sensor (10) for detecting an object in a monitored zone (20) that has at least one light transmitter (22) for transmitting a plurality of mutually separated transmitted light beams (26a-d); a plurality of light receivers (34a-d) that are each associated with one of the transmitted light beams (26a-d) for generating a received signal from the associated light beam (26, 30) remitted at the object; and an evaluation unit (46) that is configured to acquire information on the object at the respective point of incidence of the transmitted light beam (26a-d) from the received signal of the light receiver (34a-d) that is associated with the transmitted light beam (26a-d) and to additionally consider at least one received signal of a light receiver (34a-b) that is not associated with the transmitted light beam (26a-d) on the acquiring of information on the object at the point of incidence of at least one transmitted light beam (26a-d).

Abstract: A measuring device, in particular a tachymeter, laser scanner, profiler, or laser tracker, having an electronic laser distance measuring module, which comprises an optical transmitting channel having a transmitting unit and an optical receiving channel having a receiving unit for laser measuring radiation, wherein the beam guiding in the electronic laser distance measuring module is implemented by means of fiber optics, and wherein a settable attenuation unit based on an optically active crystal for attenuating the laser measuring radiation generated by the transmitting unit is provided in the optical transmitting channel.

Abstract: A method for recognizing an obstacle includes: acquiring a first dynamic parameter of the terminal at a current moment; acquiring a second dynamic parameter of the terminal at the current moment; and performing motion analysis on the obstacle based on the first dynamic parameter and the second dynamic parameter, to obtain an event recognition result of the obstacle.

Abstract: A method for particle velocity measurement may include transmitting an optical beam from an optical source, splitting the optical beam into a first beam and a second beam where the first beam and the second beam each have different polarizations, directing the first beam and the second beam toward an object, and determining a velocity of the object based on receiving the first and second beams reflected from the object.