Abstract: In an embodiment, an optical projector is provided with a laser array. Each laser is either collimated or focused to a fixed distance. At least one multiple beam grating (MBG) is placed in front of the laser array. The light pattern from the laser array is duplicated by the MBG, and cast on an object to be measured. The pattern on the object is changed by rotating the MBG. As a result, the number of patterns of structured dots that can be projected on the object is nearly unlimited. The optical projector can be used to provide depth perception to motion detection systems, to vehicle self-driving systems, and for many other uses.

Abstract: Systems and methods for maintaining a health-related action database are disclosed. The method may include receiving first information corresponding to a health-related action of a first user on a first computing device; wirelessly transmitting the first information from the first computing device; receiving second information corresponding to a health-related action of a second user on a second computing device; wirelessly transmitting the second information from the second computing device; receiving the first information and the second information using a third computing device; and updating a database on the third computing device with the first information and the second information, where the first information comprises a description of the health-related action of the first user, and the second information comprises a description of the health-related action of the second user.

Abstract: Disclosed herein are system, method, and computer program product embodiments for a GNSS interference and spoofing fast detection and mitigation system. A RF signal associated with a PNT device, such as a GNSS receiver, is received. The received RF signal is split into a plurality of sub-data signals. The received RF signal is re-routed by sending each of the plurality of sub-data signals to at least one of a processing module and a switching module. An anomaly associated with a second sub-data signal is detected. The anomaly is detected during a capture period of an adversarial attack on the PNT device, prior to corruption of any associated system depending on outputs from the PNT device. An output of a first sub-data signal of the plurality of sub-data signals is terminated based on the anomaly detected with the second sub-data signal.

Abstract: A GNSS antenna assembly for connection to a receiver circuit of a hardware front-end. The assembly may include a multiplayer antenna and a ground plane board. The antenna board may contain an L1 patch antenna of a first width, an L2 patch antenna of a second width greater than the first width, and a ground plane of a third width that is equal to or greater than the second width. The ground plane board may include a ground plane of a fourth width that is greater than the third width. Upon assembly, contact pads of the antenna board, which are in conductive contact with the ground plane of the antenna board, are in conductive contact with contact pads of the ground plane board.

Abstract: A radiation detection system may include a mobile device having a flash memory. The device may monitor various characteristics of the flash memory to determine when damage to the flash memory has occurred from radiation exposure. The device may associate damage to the flash memory with a radiation dose, and determine a level of radiation to which the memory, and thus the device, has been exposed. The device also may determine a length of time and locations where the radiation exposure has occurred. If the device determines that the level of radiation exposure exceeds a threshold associated with a safe level of radiation exposure for a human user, the device may generate an alert to the user.

Abstract: A radiation counting device is provided that includes a scintillator, a pixel circuit, and an analog-to-digital conversion circuit. In the radiation counting device, the scintillator generates a photon when radiation is incident. In the radiation counting device, the pixel circuit converts the photon into charge, stores the charge over a predetermined period, and generates an analog voltage in accordance with the amount of stored charge. In the radiation counting device, the analog-to-digital conversion circuit converts the analog voltage into a digital signal in a predetermined quantization unit less than the analog voltage generated from the one photon.

Abstract: A Compton camera system and method for detecting gamma radiation, comprising a gamma radiation source, at least one fast scintillator plate P1 of which the rise time to peak light is less than 1 ns, having a thickness greater than or equal to 5 mm, equipped with an array of segmented photodetectors (5) and a dedicated fast-reading microelectronic means. The system is characterised in that it is capable of measuring the spatial and temporal coordinates (X, Y, Z, T) and energy E at at least two successive positions of a gamma photon when said photon undergoes Compton scattering at a first point A before being absorbed at a second point B, by recognising circles of non-scattered photons corresponding to each scintillation interaction. The system has a module for estimating a valid Compton event. The detection system has two scintillator plates P1 and P2.

Abstract: Detector module designs for radiographic imaging include first and second layers of scintillator rods or pixel arrays oriented in first and second directions. The first and second directions are transversely oriented to define a light sharing region between the first and second layers. Encoding features may be disposed in, on or between the first and second layers, and configured to modulate propagation of optical signals therealong or therebetween.

Abstract: Detector systems for enhanced radiographic imaging incorporate one or more Compton and nuclear medicine imaging, PET imaging, and x-ray CT imaging capabilities. The detector designs employ one or more layers of detector modules comprising edge-on or face-on detectors, or a combination of edge-on and face-on detectors, which can employ gas, scintillator, semiconductor, low temperature (such as Ge and superconductor) or structured detectors. The detectors implement tracking capabilities, and operate in non-coincidence or coincidence detection modes.

Abstract: A method is provided for monitoring the exposure to radiation of medical personnel during an X-ray examination of an examination object with an X-ray apparatus. A monitoring unit is activated and continuously scans a first three-dimensional volume that includes a region directly irradiated by the X-ray beam, for objects. When an object is detected, automatic evaluation is performed as to whether the object is a human body part that does not correspond to the examination object and a signal or a display is output if a human body part is determined inside the three-dimensional volume that does not correspond to the examination object.

Abstract: A system and method for accurately detecting contact between two objects in a medium comprises at least one sensor for detecting vibration of a first of the two objects and a central processing unit (CPU) for receiving an output of the at least one sensor, wherein the CPU performs the steps: converting the output of the sensor into digital form; during a calibration phase, changing the data from time domain to frequency domain; and during the calibration phase, determining a first frequency range associated with actual contact between the two objects, and a second frequency range associated with a false positive contact between the two objects. A signal processor is provided for filtering all data except that which falls within the first frequency range so as to confirm actual contact between the objects.

Abstract: A technique includes using a filter having filtering parameters based at least in part on a dispersion curve of at least one vibration mode of a streamer to filter a measurement acquired by at least one sensor of the streamer and using results of the filtering to suppress vibration noise present in the measurement.

Abstract: The shape and size of a borehole may be characterized downhole, using measurements of the borehole shape in conjunction with a catalog of shapes against which the measured shape is matched. A unique identifier for the measured borehole shape, and optionally a size parameter, may be transmitted to a surface facility, generally saving bandwidth compared with the transmission of the raw measured borehole-shape data. Alternatively or additionally, downhole measurements may be adjusted based on the measured shape.

Abstract: A method for determining a fracture aperture of a fracture aperture in a wellbore comprises measuring a resistivity of the wellbore with a downhole tool in a wellbore for obtaining an image of the wellbore. Based on the image, the method detects fractures in the wellbore, and calculates a fracture aperture of the detected fracture according to a predetermined model of the wellbore set up based on hypothesis relative to the configuration of the wellbore. Then, the method estimates a correction to the predetermined model when at least one of the hypothesis is not met, and determines an uncertainty range for the fracture aperture also using a measured parameter.

Abstract: The present specification discloses systems and methods for integrating manifest data for cargo and light vehicles with their X-ray images generated during scanning. Manifest data is automatically imported into the system for each shipment, and helps the security personnel to quickly determine the contents of cargo. In case of a mismatch between cargo contents shown by manifest data and the X-ray images, the cargo may be withheld for further inspection. In one embodiment, the process of analyzing the X-ray image of the cargo in conjunction with the manifest data is automated.

Abstract: Provided are methods, devices, and non-transitory computer-readable storage mediums to generate an itinerary with a weather forecast. The itinerary may comprise a departure location, a destination location and a first time. Based on the itinerary, an intermediary location and an intermediary time associated with the intermediary location may be identified. A weather forecast associated with the identified intermediary location and the intermediary time may be predicted. A weather risk associated with the identified route may be assessed and based on the assessed risk, an alternative route may be additionally identified.

Abstract: The present invention discloses a 2D square-lattice PhC based on cross rods and rotated hollow square rods, comprising a high-refractive-index dielectric rod, a cross plate dielectric rod and a low-refractive-index background dielectric rod; the unit cell of the square-lattice PhC includes a high-refractive-index rotated hollow square rod, a cross plate dielectric rod and a background dielectric; the hollow square rod has an outer contour which is a first rotated square rod with the rotated angle ? of 45° to 65° and the side length b of 0.6 a to 0.75 a, and a hollow part with a cross section being a second rotated square rod with the rotated angle ? of 25° to 50° and the side length c of 0.33 a to 0.5 a; the first rotated square rod is connected with the cross plate dielectric rod, plate dielectric rods of which in the horizontal and vertical directions have different widths.

Abstract: Provided are an optical device and a manufacturing method thereof. The method of manufacturing an optical device may include providing a substrate structure, and depositing an array including curved structures on the substrate structure. The curved structures may include a crystalline organic compound.

Abstract: A substrate and manufacturing method therefor, a display panel, and a display device. The substrate comprises a substrate base; and a first organic film and a second organic film which are located on the substrate base, wherein the first organic film and second organic film are used as a flat layer, and the refractive index of the first organic film is different from that of the second organic film. The first organic film and the second organic film are constructed such that after incident light obliquely incident on the substrate passes through the first organic film and the second organic film, emergent light of the incident light is deflected to the direction away from the substrate.

Abstract: An apparatus for producing structured light comprises a first optical arrangement which comprises a microlens array (L1) comprising a multitude of transmissive or reflective microlenses (2) which are regularly arranged at a lens pitch P and an illumination unit for illuminating the microlens array. The illumination unit comprises an array (S1) of light sources (1) for emitting light of a wavelength L each and having an aperture each, wherein the apertures are located in a common emission plane which is located at a distance D from the microlens array. For the lens pitch P, the distance D and the wavelength L, the following equation applies P2=2LD/N, wherein N is an integer with N?1. High-contrast high-intensity light patterns can be produced. Devices comprising such apparatuses can be used for depth mapping.

Abstract: A method of marking prismatic retroreflective sheeting includes providing prismatic retroreflective sheeting having a front side and a back side, the back side having prismatic features and directing a radiation source at the back side of the prismatic retroreflective sheeting and irradiating a plurality of the prismatic features. The radiation forms a mark in the prismatic retroreflective sheeting.

Abstract: An organic light emitting diode device includes an organic light emitting display panel and a circular polarizing plate disposed on the organic light emitting display panel and including a polarizer and a compensation film, where a retardation of the compensation film in a first direction is determined based on a retardation of the organic light emitting display panel in the first direction.

Abstract: A method of fabricating a wire grid polarizer includes sequentially depositing a conductive wire pattern layer, and a plurality of guide patterns which forms one or more trenches therebetween on the conductive wire pattern layer, hydrophobically treating surfaces of the conductive wire pattern layer exposed in the trenches, and the guide patterns, coating the hydrophobically treated conductive wire pattern layer in the trenches with a neutral layer to partially fill the trenches, filling a remainder of the trenches with a block copolymer of two monomers with different etching rates, aligning the block copolymer filled in the trenches, selectively removing blocks of one monomer among the two monomers from the aligned block copolymer, and patterning the conductive wire pattern layer by using blocks of the other monomer among the two monomers remaining in the trenches and the guide patterns as a mask.

Abstract: Provided are light source module and backlight unit. A wire grid polarizer including a substrate, and a plurality of conductive wire patterns configured to be formed parallel to one another on the substrate, wherein each of the conductive wire patterns includes a first conductive wire pattern, an insulating layer and a second conductive wire pattern and the first and second conductive wire patterns are electrically insulated from each other and have different shapes.

Abstract: A light guide plate includes a first light emitting surface and a second light emitting surface. The first light emitting surface and the second light emitting surface are connected by an inclined surface. The first light emitting surface is connected to the light incident surface of the light guide plate and is higher than the second light emitting surface, and the inclined surface is provided with a protruding structure. According to the technical solutions in the embodiments of the present disclosure, part of the light projected onto the inclined surface is reflected back to the light guide plate by the protruding structure and reflected back and forth between the bottom surface of the light guide plate and the inclined surface to be sufficiently mixed and homogenized. A part of the homogenized light emits from the second light emitting surface to compensate for a longitudinal brightness difference.

Abstract: An optical device including a first layer of a total internal reflection (TIR) waveguide and a second layer of the TIR waveguide is disclosed. The second layer of the TIR waveguide may be coupled to the first layer. The second layer may include an output coupling device configured to reflect light toward an exit face of the TIR waveguide. The output coupling device may include one or more diffractive gratings. The optical device may also include an input coupling face disposed on a non-diffractive edge portion the first layer or the second layer or both the first and second layer. The input coupling face may be configured to receive image light. Another optical device may include an input coupling face disposed on a non-diffractive input coupling element. The non-diffractive input coupling element may be positioned in an optical path for directing the image light to the TIR waveguide.

Abstract: According to embodiments of the present invention, a lighting apparatus is provided. The lighting apparatus includes at least one light source configured to provide a source light, an optical waveguide optically coupled to the at least one light source, the optical waveguide having at least one input region through which the source light enters the optical waveguide for propagation within the optical waveguide, and a plurality of light interacting structures arranged within the optical waveguide, the plurality of light interacting structures adapted to interact with the source light to provide an illumination light emitted from the optical waveguide to an ambient environment, wherein a concentration of the plurality of light interacting structures increases, along a length portion of the optical waveguide, in a direction away from the at least one input region.

Abstract: Systems, devices, and methods that implement waveguides in curved transparent combiners that are well-suited for use in wearable heads-up displays (WHUDs) are described. Waveguide structures with in-couplers and out-couplers are integrated with curved eyeglass lenses to provide transparent combiners that substantially match the shape, size, and geometry of conventional eyeglass lenses and can, in some implementations, embody prescription curvatures to serve as prescription eyeglass lenses. The waveguides and in-/out-couplers are planar or curved depending on the implementation. WHUDs that employ such curved transparent combiners are also described.

Abstract: The present invention discloses a light emitting device. The device may include a printed circuit board, a reflective layer formed on the printed circuit board, a light guide layer formed on the reflective layer, and one or more light sources provided on one or more sides of the light guide layer to allow light to enter the light guide layer from the one or more sides, wherein the light guide layer may be bent with one or more curves, and wherein one surface of the light guide layer may be formed with a plurality of microstructures so as to achieve the best lighting effect and to increase luminance uniformity.

Abstract: Lightguides including pixelated images, and methods of making the lightguides are provided. The lightguides include an image formed on a major side which is illuminated for directly viewing. The image includes an elongated portion being pixelated into an array of pixels. Each of the pixels includes a single light extracting structure adapted to receive the propagating light within the lightguide along the optical axis and extract the received light transversely out of the lightguide.

Abstract: A holographic Bragg grating is used as an output element for a waveguide in a lens used for artificial reality. By using a Bragg grating, a number of waveguides can be reduced. The output element has a first super grating and a second super grating written in a single grating layer of the waveguide. The first super grating has a grating vector that is skew to a grating vector of the second super grating to provide both deflection and out coupling for two-dimensional output coupling.

Abstract: A light source module according to some example embodiments includes a first substrate and a plurality of second substrates. The first substrate includes a plurality of connectors configured to at least receive a supply of electrical power and a plurality of first connection pads that are configured to be electrically connected to the plurality of connectors. The second substrates each include a plurality of mounting elements on an upper surface and a plurality of second connection pads on a lower surface of the second substrate and configured to be electrically connected to the plurality of mounting elements. Each mounting element may be connected to a separate light-emitting device. A plurality of connection members may electrically connect the first connection pads of the first substrate to the plurality of second connection pads of the plurality of second substrates.

Abstract: A surface light source device includes a light source substrate in which a plurality of light sources capable of being driven independently of one another are disposed, a light guide plate provided on the light source substrate to emit, from a specific emission surface, light entered from the plurality of light sources, and a partition frame having a partition wall for dividing the light guide plate into a plurality of cells. The partition wall of the partition frame partially has cutout portions. The light guide plate is connected between adjacent cells through the cutout portions of the partition wall.

Abstract: An optical fiber includes an optical transmission medium comprising a core and a cladding; a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium; and a secondary resin layer coating the primary resin layer, and 1.1 ppm or less of a phosphorus compound and 2.5% by mass or less of a phenol compound based on the total amount of the primary resin layer are contained in the primary resin layer.

Abstract: A solution for fabricating a structure including a light guiding structure is provided. The light guiding structure can be formed of a fluoropolymer-based material and include one or more regions, each of which is filled with a fluid transparent to radiation having a target wavelength, such as ultraviolet radiation. The region(s) can be created using a filler material, which is at least substantially enclosed by the fluoropolymer-based material and subsequently removed from each region. The structure can further include at least one optical element integrated into the light guiding structure.

Abstract: A 400 Gb/s transmitter is integrated on a silicon substrate. The transmitter uses four gain chips, sixteen lasers, four modulators to modulate the sixteen lasers at 25 Gb/s, and four multiplexers to produce four optical outputs. Each optical output can transmit at 100 Gb/s to produce a 400 Gb/s transmitter. Other variations are also described.

Abstract: A guide transition device including a light source designed to generate a light beam, a light input port on a first plane and coupled to receive the light beam from the light source, a light output port on a second plane different than the first plane, the light output port designed to couple a received light beam to output equipment and plane shifting apparatus coupled to receive the light beam from the light input port on the first plane and to shift or transfer the light beam to the second plane. The plane shifting apparatus is coupled to transfer the light beam to the light output port on the second plane.

Abstract: An assembly with optical gain assisted optical transposer is provided. The optical transposer which optically couples a fibre array unit and a photonic integrated circuit. The optical transposer includes one or more optical gain elements which are configured to provide optical compensation, for example optical gain to mitigate optical losses associated with multistage photonic integrated devices. According to some embodiments, the optical gain element is a semiconductor optical amplifier (SOA). According to some embodiments the photonic integrated circuit is a SiPh PIC.

Abstract: A tunable optical source includes a substrate, a light source disposed on the substrate, and a wavelength selecting element configured to select light of a specific wavelength as output light, from light emitted from the light source, in accordance with a control signal. On the substrate, a wavelength filter including multiple output ports and a photodetector are disposed. The wavelength filter is configured to receive a part of the output light and to output light beams to the respective output ports. The photodetector is configured to receive the light beam output from one of the output ports. The tunable optical source further includes an inspection waveguide connecting to the photodetector at one end, and an inspection light input unit for inputting inspection light provided at the other end of the inspection waveguide.

Abstract: Systems and methods are provided for processing an optical signal. An example system may include a source disposed on a substrate and capable of emitting the optical signal. A first waveguide is formed in the substrate to receive the optical signal. A first coupler is disposed on the substrate to receive a reflected portion of the optical signal. A second waveguide is formed in the substrate to receive the reflected portion from the first coupler. A second coupler is formed in the substrate to mix the optical signal and the reflected portion to form a mixed signal. Photodetectors are formed in the substrate to convert the mixed signal to an electrical signal. A processor is electrically coupled to the substrate and programmed to convert the electrical signal from a time domain to a frequency domain to determine a phase difference between the optical signal and the reflected portion.

Abstract: According to one aspect, the invention concerns a system (100) for the in-depth optical functionalization of a sample (10) made of semiconductor material, comprising: a source (20) for emitting a laser beam formed by pulses of effective duration between 1 ps and 100 ns, having a wavelength in the spectral transparency band of the material; a microscope objective (40) for deep focusing in the sample of the laser beam in a predetermined pattern, the light intensity per pulse in a focal volume of the laser beam being adapted for multiphoton absorption in the semiconductor material; a device (30) for measuring the real part of the refractive index of the sample at each point of the pattern; a control unit (60) for controlling the number of pulses received per pattern point as a function of said measurement of the real part of the refractive index so as to obtain, at each pattern point, a progressive modification of the real part of the refractive index of the material until a relative variation of the real par

Abstract: A semiconductor structure is disclosed. The semiconductor structure includes: a substrate and a gate element over the substrate. The gate element includes: a gate dielectric layer over the substrate; a gate electrode over the gate dielectric layer; and a waveguide passing through the gate electrode from a top surface of the gate electrode to a bottom surface of the gate electrode. A manufacturing method of the same is also disclosed.

Abstract: Methods and systems for grating couplers incorporating perturbed waveguides are disclosed and may include in a semiconductor photonics die, communicating optical signals into and/or out of the die utilizing a grating coupler on the die, where the grating coupler comprises perturbed waveguides. The perturbed waveguides may include rows of continuous waveguides with scatterers extending throughout a length of the perturbed waveguides a variable width along their length. The grating coupler may comprise a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating. The grating coupler may comprise a polarization splitting grating coupler (PSGC) that includes two sets of perturbed waveguides at a non-zero angle, or a plurality of non-linear rows of discrete shapes. The PSGC may comprise discrete scatterers at an intersection of the sets of perturbed waveguides. The grating coupler may comprise individual scatterers between the perturbed waveguides.

Abstract: Disclosed is an optical fiber probe for an optical treatment including a core, to which incident light is guided, a cladding disposed to surround the core, a side surface divergence part connected to the core and configured to diverge the incident light guided to the core to a side surface of a cylindrical column, a diffusion layer disposed to surround the side surface divergence part, a distal end divergence part connected to the side surface divergence part, having a cylindrical shape, and configured to diverge the incident light guided to the side surface divergence part to the outside, and a coating layer disposed to surround the cladding and the diffusion layer and configured to seal the cladding and the diffusion layer, wherein the refractive index of the cladding is lower than the refractive index of the core, the refractive index of the diffusion layer is higher than the refractive index of the core, and the refractive index of the coating layer is higher than the refractive indices of the cladding an

Abstract: A tunable optical device comprising an optical ring cavity and one or more pairs of electrodes for capacitive actuation of the optical tuning. Applying a potential difference to the electrodes applies a capacitive force to the optical ring cavity which changes the optical resonance frequency. The device can be used as a binary optical switch.

Abstract: In the examples provided herein, a system has a first racetrack resonant waveguide structure, positioned to enable an input light signal to couple from a first waveguide; and a second racetrack resonant waveguide structure, positioned to enable the input light signal to couple between the first racetrack resonant waveguide structure and the second racetrack resonant waveguide structure, and further positioned to enable an output light signal to couple from the second racetrack resonant waveguide structure to a second waveguide. The system also has a primary heating unit, positioned to heat a primary region including a first portion of the first racetrack resonant waveguide structure and a first portion of the second racetrack resonant waveguide structure, to change a central frequency and a passband width for the system.

Abstract: A SOI device may include a waveguide adapter that couples light between an external light source—e.g., a fiber optic cable or laser—and a silicon waveguide on the silicon surface layer of the SOI device. In one embodiment, the waveguide adapter is embedded into the insulator layer. Doing so may enable the waveguide adapter to be formed before the surface layer components are added onto the SOI device. Accordingly, fabrication techniques that use high-temperatures may be used without harming other components in the SOI device—e.g., the waveguide adapter is formed before heat-sensitive components are added to the silicon surface layer.

Abstract: This application discloses an optical switch and an optical switching system. Both a first waveguide and a second waveguide of the optical switch are immovable relative to a substrate and are located in a first plane. A first deformable waveguide is also located in the first plane. A first section of the first deformable waveguide is fixed relative to the substrate, and a second section other than the first section can deform under control of a first actuator. When the first deformable waveguide is in a first state, the first deformable waveguide is optically decoupled from the first waveguide and the second waveguide, and the optical switch is in a through state. When the first deformable waveguide is in a second state, the first deformable waveguide is optically coupled to the first waveguide and the second waveguide, and the optical switch is in a drop state.

Abstract: A deformable mirror and capacitive array controller is capable of controlling a plurality of individual actuators by applying independent voltages from 0V to 240V to each actuator. The device utilizes a distributed microcontroller (MCU) architecture, including a main microcontroller and a plurality of slave microcontrollers to maximize actuator voltage refresh rate. One Slave MCU may be used for up to 384 actuators. For maximizing actuator refresh rate, each Slave MCU may be limited to 192 actuators. The final circuit stage includes a digital/analog converter, a voltage sample and hold and a high voltage amplifier, all packaged in a single integrated circuit. These integrated circuits are referred hereinafter as HV S&H (high voltage sample and hold). A flexible, stacked PCB assembly significantly reduces overall footprint and weight compared to conventional devices. The device's power consumption is nearly an order of magnitude less than that of a conventions adaptive optical system.

Abstract: A connection module includes a module body and a module circuit board arrangement. The module body defines a first port and an open first end providing access to the first port. The module circuit board arrangement extends across the open first end within a peripheral boundary defined by the module body. The module circuit board arrangement includes at least a first contact set that extends into the first port of the module body; an electronic controller that is electrically connected to the first contact set; and a circuit board connector facing outwardly from the module board arrangement. Example connection modules include optical adapters and electrical jacks.