688 results about "Light detector" patented technology

Disclosed herein is a sensor device for volumetric capnography. The sensor device is coupled to an adapter comprising a housing that encloses a measurement volume. The adapter is configured for gas flow along a first length axis, which aligns with a second length axis of the sensor device. The device includes an IR light source and an IR light detector, positioned on opposite sides of the housing. The IR light source emits IR light toward the detector across the measurement volume. The sensor device also includes a first ultrasonic transceiver in contact with the adapter and configured to emit ultrasound centered at a first position along the second length axis, directed partly along the axis and partly transversely. A second ultrasonic transceiver, also in contact with the adapter, emits ultrasound centered at a second position along the second length axis, directed partly opposite to the first direction and partly transversely.

The invention discloses a multi-mode end point detection system and method for a semiconductor dry process, and relates to the field of gas concentration detection. A gas absorption cell; the reference light path adjusting unit comprises an adjustable attenuator used for adjusting signals; the first photoelectric detector is used for detecting a transmission signal; the second photoelectric detector is used for detecting a reference signal; the lateral scattered light detector is used for detecting a scattered signal of the particulate matters in the gas absorption tank; and the signal processing unit is in signal connection with the first photoelectric detector, the second photoelectric detector and the lateral scattering light detector and is used for performing compensation calculation on the transmission signal based on the reference signal and the scattering signal so as to obtain a corrected gas absorption signal. By adopting the scheme, measurement signal distortion caused by optical mirror surface pollution and particulate matter scattering interference in a semiconductor tail gas optical detection technology is avoided.

The invention relates to the technical field of information processing, in particular to the technical field of optical detection, and particularly relates to a two-dimensional material layer number identification method and equipment. A photoelectron chip composed of a semiconductor light source, a 2 * 2 waveguide beam splitter, a grating coupler, an on-chip spectrometer, a super lens and an optical detector is compact in structure and low in cost; a semiconductor light source emits an optical signal, the optical signal sequentially passes through a 2 * 2 waveguide beam splitter, a grating coupler and a super lens and then irradiates a two-dimensional material sample, a displacement table is used for carrying out accurate Z-axis focusing and XY plane scanning, reflection spectrum signals are collected in real time, spectrum characteristics are analyzed through an upper computer to determine layer number information, and finally a layer number distribution diagram is generated. According to the method, rapid, automatic and high-precision identification of the number of layers of the two-dimensional material is realized, and large-range scanning detection is facilitated.

The invention belongs to the technical field of visible light detection, and aims to realize accurate detection of multicolor visible light and monolithic integration of a multi-wavelength receiver. The invention provides a fully-integrated multicolor visible light detector based on a sub-wavelength polycrystalline silicon grating, which comprises three detectors capable of selectively detecting blue, green and red signals respectively. The principle is as follows: a one-dimensional sub-wavelength polycrystalline silicon grating in the multicolor detector is embedded in an upper SiO2 layer and a lower shallow trench isolation region to form a dielectric waveguide structure of which the middle is a high-refractive-index medium and the periphery is a low-refractive-index oxide layer. The period and the grating width of the sub-wavelength grating are changed, so that the incident polarized light and the sub-wavelength periodic structure are strongly coupled to cause a guided-mode resonance effect, and the sub-wavelength grating can be applied to a transmission optical filter. The size and the cost of the multicolor visible light communication system can be effectively reduced, and the data transmission rate of the system is greatly improved.

A sensor module for Raman spectroscopy includes a sensor package which encloses an application specific integrated circuit (ASIC), a light emitter arrangement, a light detector arrangement and a filter arrangement. The light emitter arrangement is electrically connected to the ASIC and operable to emit light with multiple excitation wavelengths to excite Raman scattering in an external probe to be placed outside of the sensor module. The light detector arrangement is operable to generate sensor signals from incident light emitted back from the external probe due to the Raman scattering. The filter arrangement is operable to filter the incident light according to a target passband. The ASIC is operable to drive the light emitter arrangement at the excitation wavelengths to shift a Raman spectral band of the external probe into the passband of the filter arrangement.

[Object]Provided are a light receiving device and a light receiving circuit that are capable of performing highly accurate ranging with an increased field of view (FOV).[Solving Means]A light receiving device according to the present disclosure includes a light detector array including a plurality of pixels each configured to output a pulse in response to a reaction of a light detector with a photon, a counter circuit configured to count the pulse outputted from at least one of the pixels of the light detector array, and a control circuit configured to select, from the light detector array, one of the pixels to be enabled and one of the pixels to be disabled, on the basis of the number of counts of the pulse from the counter circuit.

Example embodiments relate to light detectors for nearby object detection in light detection and ranging (lidar) devices. An example embodiment includes a lidar device. The lidar device includes a light emitter configured to emit a light signal at a first time. The lidar device also includes a light detector configured to detect the emitted light signal. Additionally, the lidar device includes a biasing circuit configured to modify a detector bias using a bias signal. The bias signal ramps the detector bias from a first bias level at the first time to a second bias level at a second time. The second time is separated from the first time by a ramp duration. The ramp duration is sufficient to prevent any internal feedback within the lidar device caused by the emitted light signal from saturating the light detector or detection circuitry associated with the light detector.

The invention discloses a multi-dimensional spectrum detection device based on combination of a transmission surface and a scattering surface, and belongs to the technical field of spectrum detection.The device comprises a camera obscura, a light source part, a detection part and a sample pool, the detection part and the sample pool are arranged in the camera obscura, the light source part comprises a light source and an angle fixing base, and the light source is connected to the angle fixing base through an optical fiber; an achromatic collimator is arranged on the end surface of the angle fixing seat and is arranged below the sample pool; the detection part comprises an emergent light detector arranged right above the midpoint of the sample cell and a plurality of scattered light detectors arranged on the side surface of the sample cell, and the emergent light detector collects transmission light spots generated after the sample is irradiated and obtains transmission information; the scattered light detector collects scattered light spots generated after the sample is irradiated and obtains a scattered spectrum image. According to the invention, the limitation of a single detection mode is effectively reduced, the distribution characteristics of scattered light at different angles and background information of transmission light are utilized to form complementary calibration, and the spectral quantitative analysis precision of the substance component content is improved.

The utility model discloses an in-situ illumination KPFM testing device. The in-situ illumination KPFM testing device comprises a KPFM tester body, the KPFM tester body comprises a laser detector, a reflective mirror, a spectroscope, a laser and a sample table; laser emitted by the laser device sequentially passes through the spectroscope, the sample table and the reflective mirror and enters the laser detector; an additional light source is arranged at a position close to the sample table, and the distance between a light outlet of the additional light source and the sample table is 3-5cm; and a light filtering assembly is arranged at an inlet of the laser detector. According to the testing device, interference factors in the testing process can be effectively reduced while the authenticity of the testing environment is kept, so that the testing efficiency and precision are improved, and the accuracy and reliability of in-situ illumination testing through the KPFM are remarkably improved.

The application discloses a preparation method of a two-dimensional rhenium sulfide-molybdenum sulfide vertical heterostructure. The method is chemical vapor deposition, and Si / SiO2 is used as a substrate, a metal rhenium foil (Re) is used as a rhenium source, and a metal molybdenum foil (Mo) is used as a molybdenum source. The metal rhenium foil is laid on one end surface of the metal molybdenum foil, the substrate is inverted on the metal molybdenum foil, and the substrate is reacted with sulfur vapor to prepare a two-dimensional ReS2 / MoS2 vertical heterostructure with a multilayer ReS2 as a bottom layer and a double-layer MoS2 as a top layer. The obtained two-dimensional ReS2 / MoS2 vertical heterojunction material is a crystal stacked by two crystals with different sizes, presents obvious luminescent properties, can be used as a channel material of a transistor and applied to the field of ultrathin electronic devices, and has potential application in the field of high-efficiency light detectors.

An apparatus (100) for monitoring a fluid pipe (1), the apparatus comprising a cable (11) disposed within the pipe (1). The cable (11) comprises a plurality of sensing fibres (10, 502, 508, 510), wherein the plurality of sensing fibres (10, 502, 508, 510) are spliced together (504, 512, 506) at their respective ends to form a continuous looped configuration (500) within the cable (11). The apparatus further comprises a light emitter (101) for introducing light pulses into the continuous looped configuration (500), a light detector (110) for detecting backscattering of the light pulses from the continuous looped (configuration 500) and outputting a backscattering signal in response thereto as well as a processing unit (103) configured to process the backscattering signal to identify backscattering signal features characteristic of particular events within or in a vicinity of the fluid pipe (1).

A touch sensor panel can include a plurality of touch electrodes, one or more light detectors, a plurality of chiplets configurable for light sensing operation using the one or more light detectors or touch sensing operation using the plurality of touch electrodes, and processing circuitry coupled to the plurality of chiplets. The processing circuitry can be programmed to, in a first mode of touch sensing operation, in accordance with a determination that light detected by the one or more light detectors coupled to one or more first chiplets of the plurality of chiplets configured for the light sensing operation meets one or more first criteria, discard (or compensate) touch sensing results detected at the plurality of touch electrodes coupled to one or more second chiplets of the plurality of chiplets configured for the touch sensing operation.

Aspects relate to mechanisms to control the effective optical path length through skin tissue for non-invasive optical spectroscopy measurements. An apparatus can include a path length control part configured to control the effective optical path length of diffusely scattered light transmitted through skin tissue to produce a target effective optical path length. The apparatus may further include a spectral sensor, a detector, and a light source configured to produce input light directed towards the path length control part or the spectral sensor. The detector is configured to obtain a spectrum of an analyte under test based on the diffusely scattered light. The spectral sensor is configured to either receive the input light, produce modulated light based on the input light, and direct the modulated light to the skin tissue, or to receive the diffusely scattered light from the skin tissue and obtain the spectrum using the detector.

The utility model relates to a micro-fluidic flow cytometry fluorescence detector which comprises an excitation light source optical fiber, a light beam shaping module, a focusing and fluorescence collecting module and a micro-fluidic chip which are sequentially arranged along the excitation light path direction of the excitation light source optical fiber, and a multi-channel silicon photomultiplier tube is arranged above the micro-fluidic chip. A plurality of groups of detection channels for receiving fluorescence signals of different wave bands are arranged in the multichannel silicon photomultiplier tube at intervals up and down, and a dichroscope, a band-pass filter and a lens group are sequentially arranged in each group of detection channel along a light path and are gathered on a receiving chip; the micro-fluidic flow cytometry fluorescence detector can efficiently and accurately complete multi-wavelength fluorescence excitation and signal collection, and is suitable for multi-channel and multi-wavelength fluorescence detection requirements in a micro-fluidic chip.

The invention discloses a composite aluminum foil current collector coating thickness detection device, and relates to the technical field of coating thickness detection, the composite aluminum foil current collector coating thickness detection device comprises a thickness detection member, the thickness detection member comprises an upper wheel set, a lower wheel set, a detection rack and a laser detector, and the upper wheel set and the lower wheel set are respectively penetrated by an upper shaft and a lower shaft; the detection frame and the lower shaft rotate synchronously to change the inclination angle of the laser detector, and the tensioning wheel can ascend and descend to be used for adjusting the tightness of the composite aluminum foil on the lower wheel set. The two sides of the aluminum foil are clamped and the aluminum foil is transversely stretched, so that the aluminum foil is flatly attached to the measuring wheel. It is ensured that the aluminum foil is in a flat, tight and vibration-free state when passing through a laser measurement point, which is the premise of obtaining accurate measurement data. The whole laser detection frame can be used as a whole, the lower shaft supported by the aluminum foil synchronously rotates to change the angle of incident light, so that a specular reflection light path of ambient light deviates from the laser receiver, laser beams can still keep nearly vertical incidence, and reflected light of the laser beams can be effectively received.

A location system for locating workers including a plurality of light detectors mounted at known locations and configured to detect light from one or more workers, and a processing system configured to determine locations of the workers using the light detected by the light detectors. There is also disclosed a wearable device for locating a worker including a wireless transceiver, and a wearable device light source and / or one or more reflective elements. There is also disclosed a method for locating workers including detecting light from one or more workers using a plurality of light detectors mounted at known locations, and determining locations of the workers using the light detected by the light detectors.

A device for fluorescence-based imaging and monitoring of a target is provided. The device includes a light source emitting light for illuminating the target, the emitted light including at least one wavelength or wavelength band causing at least one biomarker associated with the target to fluoresce, and a light detector for detecting the fluorescence.

To provide an optical transport device that enable the strengths of optical signals to be recovered when the strengths of the optical signals vary, an optical transmission device comprises: a wavelength selection switch that attenuates, in accordance with an attenuation amount, each of a plurality of optical signals outputted from a plurality of optical transmitter, multiplexes and outputs the attenuated optical signals; and an optical detector that detects and compares the strength of at least one of the plurality of optical signals with a first threshold value and a second threshold value higher than the first threshold value. On the basis of the result of said comparison, the wavelength selection switch controls the attenuation amount such that the optical signal the strength of which has been detected has a strength value between the first threshold value and the second threshold value.

The invention provides a paramagnetic micro-nano magnetic particle magnetophoresis separation device and a paramagnetic micro-nano magnetic particle magnetophoresis separation method, and relates to the technical field of micro-nano magnetic particle separation and magnetic labeled biomolecule separation analysis. The separation device comprises a plurality of permanent magnets which have the same magnetism and the same size and are arranged above the separation channel at intervals in the direction of the separation channel, and a plurality of sets of mechanical structures which respectively drive each permanent magnet to move up and down in the vertical direction; the Hall sensor clings to the separation channel and is used for detecting the magnetic induction intensity at the separation channel; a liquid inlet device; a UV / Vis ultraviolet-visible light detector; a collection device and a computer. The magnetic induction intensity in the separation channel can be set, the critical diameter of the micro-nano magnetic particles capable of being captured by the magnetic field is determined, magnetophoresis separation of paramagnetic micro-nano magnetic particles is accurately achieved, the controllability of the magnetophoresis separation process is enhanced, and the separation effect of the micro-nano magnetic particles is improved.

A touch sensing apparatus is disclosed, comprising a light transmissive panel that defines a touch surface, an opposite rear surface, and panel sides extending between the touch surface and rear surface. The panel sides define a perimeter of the light transmissive panel. The touch sensing apparatus comprises a plurality of light emitters and detectors arranged along the perimeter and adjacent the panel sides, a light guide arranged along the perimeter and having a first reflective surface comprising a diffusive light scattering element. The light emitters are arranged to emit a respective beam of light onto the diffusive light scattering element so as to generate propagating light that diffusively propagates above the touch surface, wherein the light detectors are arranged to receive detection light generated as said propagating light impinges on the diffusive light scattering element, and wherein the diffusive light scattering element is arranged at least partly outside the panel sides and extending at least partly above the touch surface.

Methods and systems for in-fluid testing of electro optic liquid sensors are provided. The electro optic sensor has a light source and a light detector such that a first power state is applied to the light source to generate a first light for determining whether liquid is present within the electro optic sensor. Based on a determination that liquid is present within the electro optic sensor, a second power state is applied to the light source for generating a second light. The second power state having higher power over a shorter period of time than the first power state. The second light generated from the light source is reflected and the reflected second light is received at the light detector. The reflected second light is compared to a pulse current threshold value to determine whether the electro optic sensor is functioning properly.

The present invention provides a system and method for spectroscopic imaging. In one embodiment, a system includes: a sample stage for holding a sample to be analyzed; a first light source for generating a pulse of infrared light; a second light source for generating a probing beam of infrared light; an optical system to direct the pulses of infrared light and the probing beam of infrared light at the sample, such that a temperature change is induced in an area of the sample. The duration of the pulse of infrared light is shorter than or equal to a cooling time constant of resolution scale inclusions within the sample such that the temperature change is independent of inclusion size. Light detectors are configured to detect light from the sample and digitization electronics convert data from the light detectors into signal data indicative of a chemical composition of the sample.

The invention relates to an apparatus and a method related to detecting a silent electrical arc. The apparatus comprises an automatically dimming LCD element and circuitry for controlling the automatically dimming LCD element. A light detector detects an incident light intensity as a function of time and generates a detection signal based on the detected incident light intensity. Signal processing circuitry processes the detection signal to generate a silent electrical arc indication signal indicating a presence of a silent electrical arc when an amplitude of the detection signal in a predetermined frequency range characteristic of a silent electrical arc is above a predetermined threshold. Circuitry for activation activates dimming of the automatically dimming LCD element when the silent electrical arc indication signal indicates a presence of a silent electrical arc.

A light detection device includes: a Fabry-Perot interference filter provided with a light transmission region; a light detector configured to detect light transmitted through the light transmission region; a package having an opening and accommodating the Fabry-Perot interference filter and the light detector; and a light transmitting unit arranged on an inner surface of the package so as to close an opening, the light transmitting unit including a band pass filter configured to transmit light incident on the light transmission region. When viewed from a direction parallel to the line, an outer edge of the Fabry-Perot interference filter is positioned outside an outer edge of the opening, and an outer edge of the light transmitting unit is positioned outside the outer edge of the Fabry-Perot interference filter.

A method for detecting a defect in a bonded wafer includes receiving the bonded wafer on a wafer holder, the bonded wafer including a first structure bonded to a second structure, the first structure including first contacts, the second structure including second contacts, and the first structure bonded to the second structure forming a bonding layer including metal contacts between the first contacts and the second contacts. The method further includes illuminating a portion of the first structure for a first time duration to heat the portion of the first structure to a starting temperature, and detecting, using a light detector, a temperature map of the bonded wafer, the temperature map being detected after a second time duration. And the method further includes determining, based on the temperature map, the defect in the bonding layer of the bonded wafer.

The present disclosure discloses a device for detecting substances in a liquid to be tested using plasma spectroscopy, including an electrode, at least a portion of which is configured to be disposed in the liquid to be tested and is suitable to contact the liquid to be tested, the electrode being suitable to generate a plasma in the liquid to be tested by applying an external voltage, wherein the plasma is located in a bubble generated by the external voltage; a light detector, configured to detect the emission spectrum generated by the plasma in the bubble, wherein the light detector is an optical fiber, and there is no focusing element between the light detector and the plasma.

A vacuum cleaner device comprises a housing having a motor fan assembly configured to generate an airflow along an airflow path extending between a dirty air inlet and a clean air outlet. At least one dust particle sensor assembly is mounted along the airflow path and downstream of the motor fan assembly wherein the at least one dust particle sensor assembly comprises a light source and a light detector wherein the light detector is configured to generate a detected light signal in response to backscattered light from dust particles in the airflow. A controller is connected to the at least one dust particle sensor assembly and configured to generate a signal indicative of the operational status of the vacuum cleaner device in response to the received detected light signal from the at least one dust particle sensor assembly.

A method for monitoring a dechucking of a wafer includes illuminating, using light generated from a light source, the wafer disposed on a wafer holder in a processing chamber. The method further includes lifting, using pins disposed in the wafer holder, the wafer, and during the lifting, collecting a portion of the light at a light detector. And the method further includes, based on the collected portion of the light, determining whether to continue the lifting to complete the dechucking.

The application discloses a multi-modal post-fusion invisibility method based on reinforcement learning, an electronic device and a medium, and the method comprises the following steps: acquiring a visible light image and an infrared image; generating an initial mask by an agent; setting the initial mask for the visible light image and the infrared image; inputting the visible light image with the mask into a visible light detector to obtain a confidence score of a target object in a visible light mode; inputting the infrared image with the mask into an infrared detector to obtain a confidence score of the target object in an infrared mode; performing post-fusion processing on the above scores to obtain a post-fusion confidence score; when the above three confidence scores are all less than a threshold value, the target object completes invisibility; otherwise, a reward function is calculated, reinforcement learning parameters are updated, an updated mask is generated by the agent, the above steps are repeated for iteration, and the above three confidence scores are all less than the threshold value.

A method including emitting, by a light emitter, a first light pulse into an environment at a first time, activating a plurality of light detectors including a first light detector and a second light detector, the first light detector and the second light detector having different fields of view, generating, by the plurality of a light detectors, a plurality of analog signals based on return light reflected from the environment, converting, by a circuit configuration coupled to the plurality of light detectors, the plurality of analog signal to digital data, determining, based on the digital data, distance information associated with one or more objects in the environment.