Abstract: To provide an article inspection apparatus capable of sensitively and stably detecting a change in a spectrum when an unspecified foreign substance is contained and determining a defective product. A transport unit that transports a tablet for inspection to an article inspection position, a light irradiation unit that irradiates the tablet transported to the article inspection position with light, a light detection unit that detects light transmitted through the tablet, and an article inspection unit that inspects a quality of the tablet based on spectral characteristics of the light detected by the light detection unit are provided, and the article inspection unit standardizes a measured value of a spectrum of the light detected by the light detection unit for each wavelength and determines whether the tablet is a normal product or a defective product based on a standardized value.

Abstract: A laser processing apparatus includes a laser light output section, a laser light scanning section, a distance measurement light emitting section which emits distance measurement light, a pair of light receiving elements which receives the distance measurement light emitted from the distance measurement light emitting section and reflected by the workpiece, optical axes of the pair of light receiving elements being arranged inside the housing so as to sandwich an optical axis of the distance measurement light emitting section, a distance measuring section which measures a distance to the surface of the workpiece, and a light receiving lens which is arranged such that each of the optical axes of the pair of light receiving elements passes through the light receiving lens, and condenses the distance measurement light that has been reflected by the workpiece on respective light receiving surfaces of the pair of light receiving elements.

Abstract: A LIDAR system includes a plurality of lasers that generate an optical beam having a FOV. A plurality of detectors are positioned where a FOV of at least one of the plurality of optical beams generated by the plurality of lasers overlaps a FOV of at least two of the plurality of detectors. The lens system collimates and projects the optical beams generated by the plurality of lasers. An actuator is coupled to at least one of the plurality of lasers and the lens system to cause relative motion between the plurality of lasers and the lens system in a direction that is orthogonal to an optical axis of the lens system so as to cause relative motion between the FOVs of the optical beams generated by the plurality of lasers and the FOVs of the detectors.

Abstract: To shorten a waiting time for a belongings inspection, the present invention provides an inspection system 10 including an acquisition unit 11 that acquires personal unique information unique to each of inspection target persons, and a determination unit 12 that determines a content of a belongings inspection based on a signal of a reflection wave of an electromagnetic wave having a wavelength of equal to or more than 30 micrometers and equal to or less than one meter for the each inspection target person, based on the personal unique information.

Abstract: A device for generating light pulses for characterization, standardization and/or calibration of photodetectors, preferably within a flow cytometer or microscope is disclosed. The device includes emission light sources which are driven with predetermined waveform to emit light pulses. A feedback mechanism based on the provision of separate, series-connected control light sources whose emission is detected by a feedback detector is included. The device may include one or more emission groups of circularly arranged, multi-color emission light sources. To provide different intensity levels, the emission light sources or emission groups can be coupled into a light guide with different efficiencies. Uses of the device and systems or kits including the device is also provided.

Abstract: A photoconductive switch for generating or detecting terahertz radiation (TR) is provided. The photoconductive switch may comprise at least a first and a second pair of electrodes (EV, EH, EGR) on a surface (SS) of a photoconductive substrate, wherein the electrodes of the first pair are separated by a first gap comprising at least a plurality of first rectilinear sections (GV) extending along a first direction (x) and the electrodes of the second pairs are separated by a second gap comprising at least a plurality of second sections (GH) extending along a second direction (y), different from the first direction. The photoconductive switch may further comprise a patterned opaque layer (PML) selectively masking portions of the gaps between the electrodes. Methods and devices for generating and detecting terahertz radiation comprising such photoconductive switches are also provided.

Abstract: An optical measurement apparatus includes a thermal insulation housing, a first light-transmissive plate, a second light-transmissive plate, a heat-conductive layer, a cooling source and a photosensor. The thermal insulation housing, the first light-transmissive plate and the second light-transmissive plate define a chamber. The heat-conductive layer is disposed in the chamber, the cooling source is coupled to the heat-conductive layer, and the photosensor is disposed outside the chamber and on one side of the second light-transmissive plate facing away from the first light-transmissive plate.

Abstract: To improve detection efficiency in a solid-state imaging element including a SPAD in which an electrode and wiring are placed in a central portion. A solid-state imaging element includes a photodiode and a light collecting section. The photodiode includes a light receiving surface and an electrode placed on the light receiving surface, and that outputs an electrical signal in accordance with light incident on the light receiving surface in a state where a voltage exceeding a breakdown voltage is applied to the electrode. The light collecting section causes light from a subject to be collected in the light receiving surface other than a region where the electrode is placed.

Abstract: A device includes at least one photoconductor configured for exhibiting an electrical resistance Rphoto dependent on an illumination of a light-sensitive region of the at least one photoconductor and at least one photoconductor readout circuit. The photoconductor readout circuit is configured for determining a differential voltage related to changes of the electrical resistance Rphoto of the photoconductor. The photoconductor readout circuit includes at least one bias voltage source configured for applying at least one periodically modulated bias voltage to the photoconductor such that the electric output changes its polarity at least once. The device further includes at least one electrical circuit configured to balance the differential voltage at a given illumination level.

Abstract: A light detection device including a substrate, a first light detector, a second light detector, and a switch element is provided. The first light detector is disposed on the substrate and includes a first active layer. The second light detector is disposed between the substrate and the first light detector and includes a second active layer. The switch element is disposed on the substrate. A horizontal projection of the second active layer on the substrate completely falls within a horizontal projection of the first active layer on the substrate. A negative electrode of the first light detector and a negative electrode of the second light detector are electrically connected to the switch element via a first metal layer.

Abstract: An optical fiber with one or more microgratings is disclosed. Methods and apparatus are described for making an optical fiber with one or more microgratings. Methods and apparatus are described for an optical fiber with one or more microgratings Optical sensing methods and an optical sensing system effectively decouple strain range from the laser tuning range, permit the use of a smaller tuning range without sacrificing strain range, and compensate for ambiguity in phase measurements normally associated with smaller tuning ranges.

Abstract: The present disclosure relates to an image sensor including a plurality of pixels formed in and on a semiconductor substrate and arranged in a matrix with N rows and M columns, with N being an integer greater than or equal to 1 and M an integer greater than or equal to 2. A plurality of microlenses face the substrate, and each of the microlenses is associated with a respective pixel. The microlenses are arranged in a matrix in N rows and M columns, and the pitch of the microlens matrix is greater than the pitch of the pixel matrix in a direction of the rows of the pixel matrix.

Abstract: Certain embodiments provide a self-checking photoelectric sensor that is configured to determine a characteristic (e.g., an amount of blockage and/or wellness/decay) of an optical pathway (e.g., an electro-optical pathway). An example method generally includes increasing, over a time period that starts at a first time, a current input to a light emitting element (LEE). The method generally includes receiving, by a light detection element, an output of the LEE via the optical pathway during the time period. The method generally includes converting, during the time period, the LEE output to a voltage output. The method generally includes determining a second time in the time period when the voltage output crosses a threshold. The method generally includes determining the characteristic of the optical pathway between the LEE and the light detection element based on a difference between the second time and the first time.

Abstract: Position sensor for a mechanical device, including: an optical emitter arranged for projecting an incident radiation on a positioning track of the mechanical device provided with multiple optical sections; an optical detector arranged for detecting a reflected radiation coming from the positioning track and for generating a corresponding measurement signal; an electronic processing unit arranged for calculating, on the basis of such measurement signal, a reflectance value indicative of the reflectivity of the zone of the positioning track hit by the incident ray so as to distinguish the different optical sections of the positioning track. The position sensor also comprises a signaling module arranged for sending a warning signal as a function of the reflectance value, in order to provide to the user indications relative to the level of deterioration of the optical sections of the positioning track.

Abstract: An image sensor includes a plurality of thin lens elements, each of the plurality of thin lens elements including a plurality of scatterers configured to concentrate light of a partial wavelength band among light incident on the image sensor. The image sensor further includes a micro lens array configured to concentrate light of another wavelength band wider than the partial wavelength band, and a sensing element configured to sense light passing through the plurality of thin lens elements and the micro lens array.

Abstract: A LIDAR (1) includes at least one light emitting output (11) and at least one light receiving input (12), at least one light source (2) adapted to emit pulsed laser radiation and at least one light detector (3) adapted to receive reflected laser radiation. The light source (2) is coupled to a first port (411) of a duplexer (4), a fourth port (421) of the duplexer (4) is coupled to the light emitting output (11), and a third port (412) of the duplexer (4) is coupled to the light receiving input (12). A second port (422) of the duplexer (4) is coupled to the light detector (3). The LIDAR may be provided to a car or a robot, which employs the device and its method of operation, for optical remote sensing of a target (85).

Abstract: A method of determining perturbation of a grating formed in an optical fiber, comprises: modulating and transmitting a light beam through the optical fiber, measuring at least one phase shift in a modulation of light reflected off the grating, and determining the perturbation of the grating based on the phase shift(s).

Abstract: The present disclosure relates to a method and device for detecting ambient light, an electronic device and a storage medium. The electronic device includes: a first screen, the first screen being a foldable flexible screen; multiple light sensors, orientations of light sensing surfaces of the multiple light sensors being different; and at least one processor electronically connected with the first screen and the light sensors respectively and configured to select a target light sensor from the multiple light sensors according to a present state of the first screen and obtain target detection data representing present ambient brightness according to detection data of the target light sensor.

Abstract: A Light Detection and Ranging (LIDAR) system is provided. The LIDAR system includes a LIDAR transmitter configured with a first field of view and configured to transmit laser beams into the first field of view at a plurality of discrete transmission angles in order to scan the first field of view with the laser beams; a LIDAR receiver configured with a second field of view and configured to receive reflected laser beams from the second field of view and generate electrical signals based on the received reflected laser beams; and a controller configured to shift at least one of the first field of view or the second field of view based on a misalignment in order to optimize an overlap of the first field of view and the second field of view.

Abstract: A laser radar for a work vehicle includes a light emitter, a light receiver, and a light attenuation layer. The light emitter is configured to emit a laser light. At least part of the laser light is reflected as a reflected light. The light receiver is configured to receive the reflected light. The light attenuation layer is provided to weaken the reflected light such that the light receiver is configured to receive the reflected light which has been weakened via the light attenuation layer.