Abstract: The present disclosure provides a method for analyzing an error and an existence probability of a multi-sensor fusion. The method includes the ab obstacle sensing step, an obstacle predicting step, an error-model providing step, an existence-probability step, a tracking and fusing step and an error accumulating and correcting step. Therefore, by using the method, a plurality of fused obstacle datasets can be obtained, and an accumulation of error variations thereof can be corrected, which can improve the reliability for judging whether the obstacle exist or not.

Abstract: Disclosed is an intelligent vehicle-mounted radar device for reducing signal interference, wherein, the antenna module includes a dual-polarized antenna, namely, any polarized signal can be measured, and polarization information can be processed and extracted in real time by the polarization digital processor module, the present invention is featured by rapid and real-time. In addition, when the local oscillation module is turned on, the first rectifier diode, the first switch module, the first resistor, the second resistor and the second rectifier diode make the current flowing through the local oscillation module rise gradually to suppress signal interference, and thus improve the performance of the intelligent vehicle-mounted radar device.

Abstract: The present disclosure relates to a concept for calibrating an IQ modulator.

Abstract: A device for calibrating a radar or an antenna and embedded on an aerial vehicle, comprising: a processing unit configured to apply a delay to an incoming electromagnetic signal, wherein the device is configured to provide said electromagnetic signal with said delay to an emitter for its back transmission, wherein the processing unit is configured to control said delay according to one or more delay values, wherein each delay value simulates a virtual range of the device or of the aerial vehicle with respect to said radar or antenna receiving said transmitted electromagnetic signal, said virtual range being different from an actual range of the device or of the aerial vehicle, for calibrating said at least one radar or antenna based on said transmitted electromagnetic signal which simulates a virtual range of the device or of the aerial vehicle with respect to said at least one radar or antenna.

Abstract: A vehicle radar system (3) mounted in a host vehicle (1) arranged to run in a forward running direction (D). The vehicle radar system (3) includes a transceiver arrangement (7) to generate and transmit radar signals (4), and to receive reflected radar signals (5), the transmitted radar signals (4) have been reflected by one or more objects (6, 12). The radar system (3) provides range (rn), azimuth angle (?n) and radial velocity (vrn) for a plurality of measurement points (9, 9?) at the objects (6, 12). The radar system (3) is divides a total detection volume (8) into at least two partial volumes (8a, 8b, 8c, 8d), and performs a velocity estimation for each partial volume (8a, 8b, 8c, 8d) such that a total velocity distribution (14) is acquired along a side extension (E) that is perpendicular to an extension along the vehicle forward running direction (D).

Abstract: A target object detecting device is provided, which may include an acquisition part, a generation part, and a detecting part. The acquisition part may acquire echo signals from target objects around a ship. The generation part may generate a first echo image based on the echo signals. The detecting part may input the first echo image into a model built by a program implementing a machine learning algorithm, and may detect a first target object that is a target object other than a ship corresponding to the model, based on an output from the model.

Abstract: A ground control target includes a solid piece of plastic that is disk-shaped and convex at a top and a center of the solid piece of plastic, to shed water off edges thereof and to diffuse direct sunlight and minimize glare. The ground control target further defines an aperture through the center of the solid piece of plastic through which to fasten the solid piece of plastic to the ground.

Abstract: Embodiments of the present disclosure can include a method and apparatus for adjusting a point cloud data acquisition trajectory, and a computer readable medium. According to the embodiments of the present disclosure, a trajectory may be adjusted based on a characteristic extracted from point cloud data. A parameter that needs to be adjusted may be selected according to the property of the characteristic, instead of adjusting all parameters at the same time. In addition, according to the embodiments of the present disclosure, when trajectories are fused, the sequence relationships between the trajectory points in the trajectories can be considered, which avoids that a loop cannot be closed.

Abstract: In a light deflection device and a lider device, a parallel operation can be realized with a simple constitution, so as to avoid enlargement or complication of a system. The reflection angle of the light deflection device depends on a wavelength and a refractive index, so that light beams with respective wavelengths different from each other are simultaneously and parallelly deflected in directions of deflection angles each defined by the wavelength and the refractive index. The light beams with the plural wavelengths different from each other are deflected at the different deflection angles each defined by each wavelength and the refractive index, so that they can be deflected simultaneously and parallelly. The plural deflected light beams can be distinguished from each other based on the difference in the wavelength and the deflection angle of the light, even in the simultaneous and parallel operation.

Abstract: In one embodiment, an apparatus includes a first stage and a second stage. The first stage may include a gated-light valve (GLV) that is operable to receive a light beam from a light source and direct the light beam along one dimension to discrete input locations of a second stage. The second stage may be operable to receive the light beam from the first stage at the discrete input locations along the one dimension and direct the light beam through two dimensions to discrete output locations of the second stage to scan a three-dimensional space.

Abstract: A system and method for adaptively illuminating a volume with an illumination system that illuminates a volume of interest using separately controllable near field and far field optimized illumination sources, to maintain an irradiance pattern criteria in the volume, where that criteria may be different for a far field portion of the volume than for a near field portion of the volume.

Abstract: A detecting system is provided for detecting distant objects. The system includes a light source configured to emit light pulses towards a distant object, the light pulses are being polarized at a predefined polarization angle; a detector configured to detect at least a portion of the light pulses reflected from the distant objects; and at least one linear polarizer configured for polarizing light at the polarization angle and being so disposed with respect to the detector such that the light reaching the detector passes through the linear polarizer and is polarized at the polarization angle.

Abstract: Mounting a LIDAR above or external to a vehicle can enhance the LIDAR field of view but can conflict with vehicle aesthetics and ergonomics. Within embodiments, vehicle-integrated systems for distributing laser beams around a vehicle to increase coverage with a low-profile laser range finder are disclosed. A LIDAR can be embedded beneath a roof or body panel of a vehicle as part of a laser distribution system including a set of reflectors and lenses operable to adapt the LIDAR field of view to the vehicle shape. The set of embedded reflectors can guide laser beams parallel (e.g. within the roof structure), to and from the set of lenses at the roof edge to transmit the guided laser into regions of the surrounding beyond the direct field of view of the LIDAR. In other embodiments a beam guide (e.g. including a headlight assembly) can enable a LIDAR to perform ranging from behind a vehicle body panel.

Abstract: An active pixel sensor having an array of pixel elements arranged in columns is provided. Each pixel element including: an active area including at least one photodiode being configured to detect light pulses having a predefined time duration; a first and second floating diffusion region coupled to the active area and being configured for readout of charges accumulating in the active area; a controller configured to independently control the readout of the first and the second floating diffusion regions, and to conduct a first readout of the active area by the first floating diffusion region and a second readout of the active area by the first floating diffusion region; wherein the first readout is conducted at a first timepoint with respect to the time duration and the second readout is conducted at a second timepoint with respect to the time duration.

Abstract: In one embodiment, a method includes receiving sensor data from one or more sensors of an autonomous vehicle (AV); determining that a first sensor of the one or more sensors needs recalibration based on the sensor data. The first sensor being of a first sensor type. The method also includes sending a request to a remote management system indicating that one or more of the sensors of the AV need recalibration and a location of the AV; determining the presence of a service vehicle having a calibration target configured to calibrate sensors of the first sensor type; and initiating a calibration routine using the calibration target.

Abstract: A system includes a base having a sensor opening. An object-detection sensor is aligned with the sensor opening. A motor and a guide are each supported by the base and are spaced from each other. A continuous band is flexible relative to and engaged with the motor and the guide. At least a portion of the continuous band is transparent and extends between the sensor and the sensor opening. If a contaminant, e.g., dirt, water, snow, etc., is on the continuous band at the sensor opening, the motor moves the continuous band to locate a clean section of the continuous band at the opening.

Abstract: In one embodiment, a facility for calibrating sensors of an autonomous vehicle (AV) includes a camera calibration target configured to be measured by and used for calibrating an optical camera of the AV; a light detection and ranging (LiDAR) calibration target configured to be measured by and used for calibrating a LiDAR transceiver of the AV; and a platform configured to allow the AV to drive onto and park on the platform. The camera calibration target and the LiDAR calibration target are positioned to be detectable by the optical camera and the LiDAR transceiver while the AV is parked on the platform. The platform is further configured to modify a lateral position, height, or orientation of the optical camera and the LiDAR transceiver relative to the camera calibration target and the LiDAR calibration target while the AV is parked on the platform.

Abstract: An ECU of an object detection device stops transmission of search waves from a plurality of ultrasonic sensors when a vehicle travels at a predetermined speed or more, and counts the frequency of receiving waves with an intensity of not less than a threshold intensity for each of the plurality of ultrasonic sensors. The ECU acquires a first count that is a count of the frequency in a first sensor that is one of the plurality of ultrasonic sensors, and a second count that is a count of the frequency in a second sensor different from the first sensor. The ECU determines that snow accretion has occurred on the first sensor if the first count is smaller than the second count, and a difference between the first count and a representative value that is set based on the second count is not less than a predetermined value.

Abstract: Systems and methods of estimating a location of a mobile computing device are provided. For instance, acoustic signals can be received from one or more transmitting devices associated with a real-time locating system. A set of peaks can be selected from the received acoustic signals. A first set of transmitter locations can be assigned to the selected set of peaks. The first set of transmitter locations can be specified by an acoustic model specifying a plurality of transmitter locations within an acoustic environment in which the one or more transmitting devices are located. A first model path trace associated with the first set of transmitter locations can be compared to the received acoustic signals. A location of the mobile computing device can be estimated based at least in part on the comparison.

Abstract: An inexpensive acoustic beacon-type system suitable for the self-localization of one or more submergable secondary vehicles such as AUVs. A single beacon in a primary system periodically transmits an acoustic signal to the secondary vehicle. The acoustic signal is passively received by at least two receivers such as an AUV-mounted ultra-short baseline (USBL) array, which enables multiple vehicles to localize using just a single beacon. A controller (i) maintains time-synchronization with the primary system, (ii) develops a range estimate signal from measurements of received signals from at least two receivers and (iii) develops an azimuth-inclination estimation of likeliest angle-of-arrival of the primary signals, wherein the controller utilizes a plurality of coordinate frames to provide an estimate of secondary system location.

Abstract: A linear actuator includes a piston, a transmitter, and a receiver. The piston is configured to linearly extend and retract (such as within a cover tube). The transmitter is configured to generate a transmit electromagnetic waveform and direct the transmit electromagnetic waveform along a length of the piston. The receiver is configured to receive a return electromagnetic waveform that includes the transmit electromagnetic waveform after travelling to an extended end of the piston and returning to the receiver and determine a position of the piston based on a phase difference between the transmit electromagnetic waveform and the return electromagnetic waveform.

Abstract: An object's distance is determined using either two RF transmitters and an RF receiver, or a two RF receivers and an RF transmitter. When using two RF transmitters, the direction of the first transmitter is changed until it reaches a first direction defined by a first angle at which the power of the RF signal—transmitted by the first transmitter—reflected off the object and received by the receiver reaches a maximum value. The direction of the second transmitter is also changed until it reaches a second direction defined by a second angle at which the power of the second RF signal—transmitted by the second transmitter—reflected off the object and received by the receiver reaches a maximum value. The distance between the object and the first transmitter is defined by the distance between the two transmitters, the second angle, and the difference between the first and second angles.

Abstract: Embodiments of the present invention include the different methods for data fusion from multi dissimilar sensors to reduce the noise of the tracking the 3D target in Cartesian coordinates. Accuracy of this invention is precise and more stable than the conventional methods that use geometric calculations of 2D radars to track 3D targets. The results of this invention are using the same 3D radars in the tracking system. These methods are not only implemented in existing tracking centers, but also handle the tradeoff between the data transmission capacity at the command center and the computational speed of system. This invention performs the sequential steps: determining the dynamical motion model of target, state prediction and measurement update. Wherein, the variation of steps is shown in the embodiment of this invention by the following different approaches: selective measurement; parallel filtering; state vector fusion; feedback state vector fusion; measurement fusion state vector fusion.

Abstract: A fusion system and method for constructing tracks of a ground target from radar and optical detections are described. The system includes a radar channel and an optical channel The radar channel includes a Ground Moving Target Indicator (GMTI) radars providing GMTI detections in the form of GMTI plots, a GMTI tracker configured for constructing GMTI tracks of the ground target from the GMTI plots, and a Smooth Radar Plots generator configured for sequentially in time producing smooth radar plots in the form of locations of ground target on the GMTI tracks and corresponding location errors. The optical channel includes electro optical (EO) sensors sequentially in time providing EO detections in the form of coordinates of the ground target, and a combiner tracker configured for combining data streams of the radar channel with data streams of the optical channel, and producing fused tracks of the ground target.

Abstract: A vehicle radar system (3) and method including a first and second radar sensor arrangement (4a, 4b). Each radar sensor arrangement (4a, 4b) includes at least two transmitter antenna devices (10a1, 10a2) and at least two receiver antenna devices (13a1, 13a2, 13a3, 13a4), where each receiver antenna device (13a1, 13a2, 13a3, 13a4) has a corresponding boresight extension (46a, 46b) that is perpendicular to an antenna plane (57). Each receiver antenna device (13a1, 13a2, 13a3, 13a4) has a corresponding antenna radiation pattern (47a, 47b) that has a lower gain (48a, 48b) in its boresight extension (46a, 46b) than at a certain corresponding first maximum gain azimuth angle (?1a, ?1b) where there is a first maximum gain (49a, 49b). Each radar sensor arrangement (4a, 4b) is mounted such that each first maximum gain (49a, 49b) is directed along a corresponding first maximum gain extension (51a, 51b), such that an overlap part (56) of the antenna radiation patterns (47a, 47b) is formed.

Abstract: A radio frequency (RF) imaging device comprising a display receives a three-dimensional (3D) image that is a superposition of two or more images having different image types including at least a 3D RF image of a space disposed behind a surface. A plurality of input control devices receive a user input for manipulating the display of the 3D image. Alternatively or additionally, the radio frequency (RF) imaging device may receive a three-dimensional (3D) image that is a weighted combination of a plurality of images including a 3D RF image of a space disposed behind a surface, an infrared (IR) image of the surface, and a visible light image of the surface. A user input may specify changes to the weighted combination. In another embodiment, the RF imaging device may include an output device that produces a physical output indicating a detected type of material of an object in the space.

Abstract: A code reading method and a radar system using a short-range millimeter wave (mmWave) radar are provided. The method includes transmitting a mmWave radar signal to a target object from a radar system and receiving a reflection wave signal reflected on the target object, extracting reflection signal strengths for a plurality of line codes constituting the target object from the reflection wave signal, compensating for the reflection signal strengths considering a difference in antenna gain between the plurality of line codes as per an antenna radiation pattern of the radar system, forming a radar image using the compensated reflection signal strengths, and reading a binary code from the radar image.

Abstract: A measuring device (200) is a device disposed in a mobile body, and includes a measurement unit (202) that scans an object by emitting electromagnetic waves. The measurement unit (202) is controlled by a measurement unit control device (203) including a control unit (204). The control unit (204) sets a scanning range of the measurement unit (202) using information on a position that is a predetermined distance ahead. Specifically, the control unit (204) determines a position that is a predetermined distance ahead of the current position of the mobile body (240), on a predicted course of the mobile body (240). Further, the control unit (204) uses information on the position that is a predetermined distance ahead to set the scanning range of the measurement unit (202).

Abstract: A three-dimensional reconstruction system includes an infrared light source array including a plurality of infrared sub-light sources, and each of the infrared sub-light sources emitting an infrared light, and different infrared sub-light sources being coherent light sources, an infrared detector configured to receive an infrared light reflected from a target object, the reflected infrared light being a reflected light of an interference beam emitted by the coherent light source, a calculation circuit, configured to calculate a reference distance between a reflection point on the target object and the infrared sub-light source according to the reflected infrared light and the infrared light emitted by the infrared sub-light source, and a three-dimensional reconstruction circuit, configured to perform reconstruction of a three-dimensional image on the target object according to the plurality of reference distances.

Abstract: The invention relates to a civil engineering device and a civil engineering method for using a civil engineering device. The device has a support device, a ground preparation tool, which prepares the ground at a preparation location, and at least one GPS unit, which is arranged on the support device and is designed to determine the position of the preparation location, wherein the GPS unit is arranged at a distance from the ground preparation location. The civil engineering device is characterised in that a measuring device is provided in addition to the GPS unit, the measuring device being designed to determine the distance between the GPS unit and the preparation tool.

Abstract: A method for processing a signal arising from coherent lidar includes a coherent source that is periodically frequency-modulated; a beat signal being generated by photodetector on the basis of the interference between an optical signal that is referred to as the local oscillator having a local oscillator frequency (fOL(t)) and an optical signal that is backscattered by a target illuminated by the lidar, said beat signal being digitized; the local oscillator frequency (fOL(t)) being made up of the sum of a mean value (f0) and of a modulation frequency (fmod(t)) arising from the modulation of the source, the modulation frequency being periodic according to a modulation period (TFO), each period comprising n linear portions having n frequency slopes (?i), respectively, where n is greater than or equal to 2, the method comprising the steps consisting in: complexly modulating the beat signal; complexly demodulating the modulated signal (Smod) by n demodulation frequencies (fdemod(i)) each having a single slope tha

Abstract: A detection assembly for a cleaning robot includes: a light emitter, configured to emit test light; a darkroom having an access hole for light to enter the darkroom; a plurality of optical receivers, disposed in pairs in the darkroom and configured to receive light entering the darkroom via the access hole after being emitted by the light emitter and reflected by an external reflective surface and to convert a light intensity signal into an electrical signal; a detection circuit electrically connected to the plurality of optical receivers and configured to perform differential operation processing on the electrical signals of each pair of the optical receivers and to generate an output signal.

Abstract: A ranging light source includes a light source, a frequency division device and a transmitter. The light source is configured to generate a comb laser. The frequency division device is configured to generate a plurality of emitting n laser beams. These emitting laser beams have different center frequencies respectively. The transmitter is configured to output the emitting laser beams. The light source, the frequency division device and the transmitter are located on a first optical path. On the optical path, the frequency division device is between the light source and the transmitter.

Abstract: The present invention relates to an optical telemetry system for measuring the distance between two vehicles comprising a first optoelectronic assembly formed by at least one light source SLs and at least one photosensitive sensor CP+, which source and sensor are oriented towards in front of the vehicle, and a second optoelectronic assembly formed by at least one light source SLc (6) and at least one photosensitive sensor CPc (5) that is oriented towards behind the vehicle, characterized in that said light sources SLs and SLc are conventional light sources, the light source SLs being modulated by a signal of frequency Fs, said light source SLc (6) of the target (4) being modulated by a clock of frequency controlled by a phase-locked loop driven by the electrical signal delivered by said photosensitive sensor CPc, said first optoelectronic assembly furthermore comprising a circuit for measuring the phase shift between the electrical signal delivered by said photosensitive sensor CPs (5) and the signal modulati

Abstract: A method of laser distance measurement includes issuing a command from a single controller to a laser pulse emitter to emit a laser pulse. The method includes issuing a command from the single controller to a laser pulse detector to open for detection of a return of the laser pulse. The method includes detecting a return of the laser pulse, determining total time of travel for the laser pulse, and calculating a distance measurement based on the time of travel of the laser pulse.

Abstract: An electronic device comprising circuity configured to integrate charge collected by at least two floating diffusions on at least one capacitor and to change the direction of charge integration from a first current flow direction to a second current flow direction between a first integration phase and a second integration phase.

Abstract: Techniques are described herein that are capable of forming a depth map and/or projecting an image onto object(s) based on the depth map. A depth map is a three-dimensional representation of an environment. Forming the depth map may utilize a progressive resolution refinement technique. For example, locating information may be determined in accordance with the progressive resolution refinement technique in response to performing a scan of a current point over a field of view. The current point is a point, selected from a plurality of points (e.g., a grid of points) in the field of view, to which a detection beam of light is directed at a respective time as the scan is performed over the field of view. In accordance with this example, the locating information may be coordinated with the scan to form the depth map.

Abstract: The present technology relates to an imaging device and an electronic device that enable construction of an imaging device that outputs information required by a user with a small size. A single-chip imaging device includes: an imaging unit in which a plurality of pixels is arranged two-dimensionally and that captures an image; a signal processing unit that performs signal processing using a captured image output from the imaging unit; an output I/F that outputs a signal processing result of the signal processing and the captured image to an outside; and an output control unit that performs output control of selectively outputting the signal processing result of the signal processing and the captured image from the output I/F to the outside. The present technology can be applied to, for example, an imaging device that captures an image.

Abstract: An anti-collision system for an aircraft is provided. The anti-collision system preferably comprising a plurality of LIDAR sensors installed on the aircraft wherein each LIDAR sensor in the plurality of LIDAR sensors has a wide horizontal field of view and a small vertical field of view; a battery in electrical communication with the plurality of LIDAR sensors; a processor in electrical communication with the LIDAR sensors; a siren coupled to the aircraft and in electrical communication with the processor; and a keypad in electrical communication with the battery and processor and coupled to the aircraft.

Abstract: Methods of checking the integrity of the estimation of the position of a mobile carrier are provided, the position being established by a satellite-based positioning measurement system, the estimation being obtained by the so-called “real time kinematic” procedures. The method verifies that the carrier phase measurement is consistent with the code pseudo-distance measurement. The method comprises a step of calculating the velocity of the carrier, at each observation instant, a step of verifying that at each of the observation instants, the short-term evolution of the carrier phase of the signals received on each of the satellite sight axes is consistent with the calculated velocity and a step of verifying that at each of the observation instants, the filtered position obtained on the basis of the long-term filtered measurements of pseudo-distance through the carrier phase is dependable.

Abstract: Apparatus and methods provide anti-spoofing capability from a first global navigation satellite system (GNSS) receiver to a second GNSS receiver. These GNSS receivers can be, for example, global positioning satellite (GPS) receivers. Via an authentication technique, signals from authentic GNSS sources are distinguished from signals from spoofers. Timing information, such as numerically-controlled oscillator (NCO) settings, used for tracking authenticated signals are then used to generate replica GNSS signals, which are then provided to the second GNSS receiver. As a result, the second GNSS receiver can provide accurate positioning system information in the presence of GNSS spoofers.

Abstract: Systems, methods and apparatuses for multipath mitigation in global navigation satellite system (GNSS) receivers are described. One method includes modifying the locally generated code in the GNSS receiver bit by bit in order to reduce offset peaks in the autocorrelation when receiving the satellite generated code signal. Such modified local codes may be pre-computed and stored or otherwise provided during reception. Moreover, the GNSS receiver may select whether or not to use the modified local code or the standard local code based on a selection criteria. Furthermore, multiple modified version of the same local code may be generated and/or stored in order to provide differing performance levels.

Abstract: A method and system for restoring a GPS signal is provided. The method including the steps of receiving a target location , receiving location of visible satellites, calculating a transmit delay, calculating a Doppler offset, calculating a chipping offset, computing navigating data and PRN codes, formulating signals using the transmit delay, Doppler offset, chipping offset, navigation data and PRN codes, and transmitting the formulated signal.

Abstract: Apparatus, systems, and methods are disclosed relating to a position determination system for a motor vehicle for ascertaining whether the motor vehicle is located in an area covered by a ceiling element of a structure, comprising: a receiver unit, which is designed to receive navigation signals of a plurality of satellites of one or more global navigation satellite systems and to detect a change in signal strength, over time, of the respective navigation signals. An evaluation unit ascertains lines of sight from the motor vehicle to the respective satellites from which navigation signals were received, evaluates the change in signal strength, over time, of the respective navigation signals relative to the respective ascertained line of sight, and ascertains that the motor vehicle is entering the covered area by correlating a driving motion of the motor vehicle with the respective lines of sight.

Abstract: A method of adaptive weighting adjustment positioning has the following steps: performing an initialization procedure, determining whether a first feature point is detected; when the first feature point is detected, based on multiple positioning methods, multiple positioning information will be generated, and multiple weightings will be set, and then based on the weightings and the positioning information, calculating the positioning information output; by way of adaptive weighting adjustment among the multiple positioning methods, the multiple positioning methods can be integrated. In this way, even if one of the positioning methods is temporarily unavailable, the positioning information can still be calculated by weighting adjustment between the positioning information of the remaining two available methods, and that allows users to continue to obtain accurate positioning information to confirm the current location.

Abstract: There is provided a photon-counting x-ray detector system (200) comprising a plurality of photon-counting channels (220), and at least one anti-coincidence circuit (230), each of which is connected to least two of the channels and configured to detect coincident events in the connected channels. The x-ray detector system (200) further comprises an anti-coincidence controller (240) configured to control the operation of said at least one anti-coincidence circuit based on photon count information by gradually adapting the operation of said at least one anti-coincidence circuit with increasing count rates, starting from a threshold count rate.

Abstract: Provided is a radiation monitor, including: a radiation detection unit which includes a radiation detection element, the radiation detection element emitting light of a predetermined light emission wavelength; a light emission unit which emits light of a wavelength different from the light emission wavelength; a wavelength selection unit which passes the light of the light emission wavelength, and is set to a first mode to block the light from the light emission unit; an optical transmission line which transmits the light; a light detection unit which converts the light passing through the wavelength selection unit into an electric pulse; and a control unit which measures a count rate of the electric pulse, and determines whether at least the light emission unit is degraded on the basis of the count rate and a light intensity of the light emission unit.

Abstract: A scintillation crystal can include a rare earth silicate, an activator, and a Group 2 co-dopant. In an embodiment, the Group 2 co-dopant concentration may not exceed 200 ppm atomic in the crystal or 0.25 at in the melt before the crystal is formed. The ratio of the Group 2 concentration/activator atomic concentration can be in a range of 0.4 to 2.5. In another embodiment, the scintillation crystal may have a decay time no greater than 40 ns, and in another embodiment, have the same or higher light output than another crystal having the same composition except without the Group 2 co-dopant. In a further embodiment, a boule can be grown to a diameter of at least 75 mm and have no spiral or very low spiral and no cracks. The scintillation crystal can be used in a radiation detection apparatus and be coupled to a photosensor.

Abstract: The systems and methods receive signals from pixelated anodes for at least one event, and pass the signals from the pixelated anodes through corresponding channel pairs, attenuate the signal from a plurality of select anodes at the first and second shaper circuits coupled to the plurality of the select anodes to form a candidate energy signals and an authentication energy signals, respectively, compare a ratio to identify whether the select anode is a collected energy signal or a non-collected energy signal, repeat the attenuating and comparing operations for a plurality of select anodes have one or more collecting anode and a plurality of peripheral anodes, subdivide the collecting anode having the collected energy signal into a plurality of sub-pixels, and identify a location of the at least one event relative to the plurality of sub-pixels based on non-collected energy signals from the plurality of peripheral anodes.

Abstract: Detector systems for enhanced radiographic imaging incorporate Compton and PET imaging capabilities. The detector designs employ one or more layers of detector modules comprised of edge-on or face-on detectors, or a combination of edge-on and face-on detectors, which may employ structured detectors. The detectors implement tracking capabilities and operate in a non-coincidence or coincidence detection mode.