Abstract: A LIDAR unit includes: an LD driver, a laser diode, and a scanner corresponding to an emission unit; a photo detector, a current/voltage conversion circuit, a A/D converter and an valuable segmenter that correspond to a light receiving unit; a landmark position prediction unit and landmark map acquisition unit that acquire position information indicating the position of a landmark on a map; and a synchronization controller that generates a valuable pulse trigger signal and a segment extraction signal. Based on a predicted current vehicle position value and the position of the landmark on the map, the landmark position prediction unit determines a predicted angular range of the landmark. The synchronization controller generates the valuable pulse trigger signal and the segment extraction signal such that the scan density of the light pulse is higher in the predicted angular range than the scan density of the light pulse in the other range.

Abstract: Provided are a LIDAR apparatus based on a time of flight and a moving object which output an electrical signal by transmitting and receiving light, generate a control signal by analyzing the electrical signal, measure a pin point distance by calculating a time of flight of the light based on the control signal, and process point cloud data generated based on a measured distance to accurately construct information on a surrounding environment.

Abstract: A laser beam apparatus that is used for detecting vehicles in an intelligent traffic system according to an embodiment includes: a light source generating a laser beam of a short pulse; an optical transmission system converting the laser beam into a line beam; and an optical reception system receiving a beam dispersed rearward and reflected and returned when the line beam is radiated to a vehicle, and calculating a distance value from a reception time difference between the laser beam and the reflected beam, in which a first lens and a second lens that receive a laser from the light source are sequentially arranged in the optical transmission system, and the length of a horizontal axis of the line beam is increased or decreased to fit to the width of a road to be measured, by adjusting the distance between the light source and the first lens.

Abstract: The present disclosure relates to systems and methods operable to provide point cloud information about an environment based on reconfigurable spatial light emission patterns and reconfigurable light detector arrangements that correspond to the light emission patterns. Additionally, a LIDAR device with a plurality of light emitters and photodetectors may be operated in a first mode of operation or a second mode of operation. The first mode of operation could be a normal mode of operation. The second mode of operation could be a failsafe mode of operation that is used when a fault condition is detected.

Abstract: A distance measurement system includes a light transmitter to generate a modulated light signal, a light sensor to generate measurement signals from reflected light among four quad phase angles with respect to a phase of the generated light signal, and a controller. The controller selects a first set of quad phase angles, and generates first measurement signals at the quad phase angles of the first set. Based on the first measurement signals, the controller computes a first phase angle between the generated light signal and the reflected light signal, generates a second set of quad phase angles based on the first phase angle, and generates second measurement signals at the quad phase angles of the second set. Further, based on the second measurement signals, the controller computes a second phase angle between the generated light signal and the reflected light signal and calculates a distance using the second phase angle.

Abstract: The present disclosure relates to a generally-applicable measurement technique based on coherent quantum enhancement effects and provides embodiments with nonlinear optics. The technique utilizes parametric nonlinear processes where the information-carrying electromagnetic quanta in a number of electromagnetic modes are converted phase coherently to signature quanta in a single mode or a few modes. The phase coherence means that while the quanta before conversion may have unequal or uncertain phase values across the modes, the signature quanta converted from those different modes have the (near) uniform phase. This can lead to significant increase in the signal to noise ratio in detecting weak signal buried in strong background noise. Applications can be found in remote sensing, ranging, biological imaging, field imaging, target detection and identification, covert communications, and other fields that can benefit from improved signal to noise ratios by using the phase coherent effect.

Abstract: A distance measuring method and an electronic laser distance measuring module, in particular for use in a distance measuring apparatus, especially configured as a laser tracker, tachymeter, laser scanner, or profiler, for fast signal detection with an analog-to-digital converter, wherein conversion errors that arise in the context of a signal digitization, in particular timing, gain and offset errors of the ADC, are compensated for by means of variation of the sampling instants.

Abstract: A three dimensional image measurement system including a first optical system and a second optical system is provided. The first optical system is adapted to output a structural light beam and a zero order light beam. There is an angle between the structural light beam and the zero order light beam. The first optical system performs an optical operation to project the structural light beam to a three dimensional object to obtain three dimensional information of the three dimensional object. The second optical system is adapted to receive the zero order light beam and perform another optical operation by using the zero order light beam. The first optical system includes a plurality of optical elements. The value of the angle between the structural light beam and the zero order light beam is determined according to position parameters of the optical elements.

Abstract: The present disclosure relates to a method for identification of a noise point used for a LiDAR, comprising: receiving a point cloud generated by the LiDAR; obtaining at least one of reflectivity and continuity parameter of a point in the point cloud, and a distance between the point and the LiDAR; and determining whether the point is a noise point at least based on at least one of the reflectivity and the continuity parameter, and the distance.

Abstract: A time of flight sensor has a photosensitive image region (1) comprising a linear array of M pixels; a storage region (2) comprising M columns of N storage elements, and transfer circuitry to transfer data along the M columns of storage from an input storage element connected to a respective one of the M pixels along column of N storage elements to an output storage element at a transfer frequency Ft, each row of M storage elements storing data captured at the same time; and a readout section (3) arranged to read out data from the output end of the M columns of the storage region at a readout frequency Fr. In this way the readout frequency and transfer frequency may be separately controlled. An amplifier (4) may be connected to the readout section. An optical shield (5) may shield the storage elements leaving the photosensitive image region unshielded. The elements may be elements of a charge coupled array.

Abstract: A coordinate measuring device for detecting a position of a target object which can move in space and which comprises a retroreflector, wherein an automatic identification of a recognized target object and an assignment of specifications associated with the target object takes place.

Abstract: Provided are a beam steering apparatus, a method of driving the beam steering apparatus, and a light detection and ranging (LiDAR) system including the beam steering apparatus. The beam steering apparatus includes: a phase modulation device configured to modulate a phase of incident light and emit at least first emitted light and second emitted light; and a beam reflection device configured to reflect, to an object, at least one from among the first emitted light and the second emitted light. The phase modulation device includes a plurality of channels configured to independently modulate the phase of the incident light, and a binary phase profile is formed when one of first and second phase values ?1 and ?2 is applied to each of the plurality of channels.

Abstract: A method of determining distances to features in a scene comprising transmitting structured light modulated at a modulation frequency to illuminate the scene with a structured illumination pattern and for each combination of a sampling phase offset ?k and a perturbation phase shift ?n, modulating sensitivity of a photo sensor at the frequency of modulation of the transmitted light, but phase shifted relative to phase of the transmitted light by a phase ?k,n=(?k+?n), and for each value of ?k,n modulo 360°, registering light reflected by features in the scene during a different exposure and using the registered light to provide a range image of the scene.

Abstract: The present disclosure relates to a laser ranging device. The laser ranging device includes an encoded chassis, a rotary disc, a first barrier ring on the rotary disc and/or a second barrier ring on the encoded chassis. The encoded chassis includes a rotary bin and a plurality of ranging teeth disposed at intervals on the periphery of the rotary bin. The rotary disc is mounted within the encoded chassis and is rotatable within the rotary bin when the rotary disc is driven. The first barrier ring is disposed at the edge of the bottom surface of the rotary disc and the second barrier ring is disposed at the periphery of the ranging teeth, and the first barrier ring is located at the periphery of the ranging teeth after the rotary disc is mounted to the encoded chassis.

Abstract: A light detection and ranging (LIDAR) system includes an optical scanner to transmit a frequency-modulated continuous wave (FMCW) infrared (IR) optical beam and to receive a return signal from reflections of the optical beam; an optical processing system coupled with the optical scanner to generate a baseband signal in the time domain from the return signal, where the baseband signal includes frequencies corresponding to LIDAR target ranges; and a signal processing system coupled with the optical processing system to measure energy of the baseband signal in the frequency domain, to compare the energy to an estimate of LIDAR system noise, and to determine a likelihood that an signal peak in the frequency domain indicates a detected target.

Abstract: Provided is a disclosure for detection of objects using projected light of one or more frequencies, where the light may be structured or non-structured.

Abstract: A light detection and ranging system comprises an optical transmitter for beam scanning on a scan region, and receiving reflected light from the scan region; and an optical receiver for directing the reflected light for signal conversion. The optical transmitter includes a beam refractive unit including optical refractive devices, rotatably disposed about a rotation axis, for directing a collimated laser beam from a first optical path towards a direction depending on rotation angles of the optical refractive devices; and a motion unit for actuating relative motion of the optical refractive devices so as to perform beam scanning towards directions on the scan region. The optical receiver includes an off-axis reflective unit, disposed in the first optical path, for directing the reflected light towards a second optical path; and a light detection unit, disposed in the second optical path, for performing signal conversion on the reflected light.

Abstract: The processing unit causes a light source unit to emit modulated light in one or more emission periods in a plurality of charge transfer cycles within a frame period from connection of an accumulating region to a reset potential to next connection of the accumulating region to the reset potential by controlling a reset switch, and increases the number of emission periods per charge transfer cycle within one frame period. The processing unit obtains, from a sensor unit, a plurality of read values corresponding to a charge amount accumulated in the accumulating region at an alternate point with the plurality of charge transfer cycles, in each of a plurality of read cycles corresponding to each of the plurality of charge transfer cycles. The processing unit calculates the distance based on the plurality of obtained read values.

Abstract: To improve a distance measurement accuracy by combining a plurality of distance measuring methods while avoiding interference of projection light. A light source projection unit projects intensity-modulated spatial pattern light. A time-of-flight distance measurement camera measures a distance to an object on the basis of a time of flight of a modulated component included in reflected light of the spatial pattern light from the object. A spatial information distance measurement camera measures a distance to the object on the basis of spatial information included in the reflected light. A depth synthesizing unit synthesizes measurement results of the distances in the time-of-flight distance measurement camera and the spatial information distance measurement camera to determine a depth value of each pixel position of an image imaged by the time-of-flight distance measurement camera or the spatial information distance measurement camera.

Abstract: A stray-light tolerant LIDAR measurement system. The system comprises an interferometer assembly having a continuous-wave laser source, a photodetection arrangement and optical components. The laser source comprises a laser-light-generating component, a downstream optical phase modulator and a control unit connected to the modulator to deliver a control signal corresponding to a pseudo-noise signal defined by a predetermined phase function.