1055 results about "Light detector" patented technology

A wearable system can include an electronic device configured to measure one or more physiological parameters of a patient and a wearable device configured to operably position the electronic device. The electronic device can have at least one light emitter and at least one light detector and be configured to measure at least a pulse oximetry measurement. The wearable device can have a main body with a cavity configured to position the electronic device, a securement portion connected to the main body and configured to secure the main body to the patient, and storage component configured to store patient identification data associated with the patient. When the electronic device and the wearable device are secured to one another, the patient identification data can be transferred from the wearable device to the electronic device.

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.

Systems, methods, and non-transitory computer-readable media containing instructions are disclosed for detecting and utilizing facial skin micro-motion. In some non-limiting embodiments, detection of facial skin micro-motion occurs using a speech detection system that may include a wearable housing, a light source (coherent light source or incoherent light source), a light detector, and at least one processor. The one or more processors may be configured to analyze light reflections received from the facial region to determine facial skin micromotion, and extract meanings from the determined facial skin micromotion. Examples of meanings that may be extracted from the determined facial skin micromotion may include words spoken by the individual (silent or voiced), an identity of the individual, an emotional state of the individual, a heart rate of the individual, a respiratory rate of the individual, or any other biometric, emotion or speech related indicator.

This flow cytometer includes a flow path through which an observation object flows with a fluid; an optical illumination system including a spatial optical modulation device, and a first optical element; and an optical detection system including a first light detector, wherein the optical illumination system further includes a first spatial filter disposed in a first optical path between a light source and an image position of light imaged in the flow path by the first optical element and having a first region which hinders traveling of light emitted from the light source towards the observation object, the optical detection system further includes a second light detector disposed in a second optical path between the first light detector and the image position and having a second region which directs the light modulated by the observation object towards the first light detector, and the position of the first region and the position of the second region are in a substantially optically conjugate relationship.

Methods and device for obtaining microscopic digital images, using an emission module, a detection module and an observation zone arranged between said modules, the method comprises arranging a sample in said observation zone and:-determining at least one target light emitter of said emission module;-determining at least one target detection zone of said detection module each zone corresponding to one target light emitter;-activating the target light emitter(s) and reading the light detectors of the target detection zone(s);-determining a plurality of target pixels of said digital image and obtaining each of said target pixels from said reading of said target light detectors;and, iterating until all the image pixels of said digital image are obtained, thus obtaining said microscopic digital image of said sample.

A thickness-distribution measurement device includes a light source; a light detector; and a control device. The light source irradiates a region of an object being conveyed with light, the region extending in a width direction. The light detector detects emitted light that has transmitted through the object. The control device obtains information on a distribution of a relative thickness of the object in the width direction based on a detection result in the light detector. The light detector includes an image sensor and a lens array. The image sensor includes a plurality of pixels arranged in the width direction, and detects an intensity of the emitted light for each pixel. The lens array includes a plurality of lenses having an equal magnification and arranged along the width direction, and collects the emitted light and forms an image of the emitted light on the image sensor.

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.

A rotatable LIDAR system includes a rotor configured to rotate about a central rotational axis and multiple optical components mounted to the rotor such that the optical components are configured to rotate about the central rotational axis. The optical components include a first light source configured to emit first light towards a first portion of a field of view (FOV) with a first range, a first light detector configured to receive reflections of the first light from first objects in the first portion of the FOV, at least one second light source configured to emit second light towards a second portion of the FOV with a second range shorter than the first range, and a second light detector configured to receive reflections of the second light from second objects in the second portion of the FOV. Other embodiments are also described.

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.

An OCT instrument comprising: an optical coupler which generates signal light and reference light from a swept narrowband light source; a detector which samples a time-varying interference signal based on the reference light and signal light returned from a sample; an adjustable optical frequency shifter which: generates a first sideband light by adjusting an optical frequency of the reference light, such that the detector unit samples a first time-varying interference signal resulting from an interference between the sideband light and the returned signal light; and maintains the optical frequency of the reference light such that the detector unit samples a second time-varying interference signal resulting from an interference between the reference light and the returned signal light. The OCT instrument generates a respective axial depth profile of the sample based on each of the sampled first time-varying interference signal and the sampled second time-varying interference signal.

An embodiment of a spectrophotometric device for measuring blood oxygen saturation includes a light source, a detector for detecting a light signal reflected by a subject's tissue, an electronic data processing unit to calculate blood oxygen saturation based on the light signal, and a motion sensor for detecting a motion signal indicative of motion of the light source and / or the light detector. The electronic data processing unit may discard a light signal measured by the detector if the motion signal detected by the motion sensor exceeds a predetermined threshold value. An embodiment of a method for measuring blood oxygen saturation includes emitting a light signal into a subject's tissue, detecting the light signal reflected by the tissue, calculating blood oxygen saturation using the light signal measured by the detector, and detecting a contact signal indicative of contact between a subject's skin and the light source and / or the detector.

An electronic device may include a proximity sensor for detecting whether an external object is in the vicinity of the device. The proximity sensor may have a light detector and a light source that can be reused for data communications. The light detector may be coupled to optical receiver circuitry, whereas the light source may be coupled to optical transmitter circuitry. The optical transmitter circuitry may include encoding circuits configured to convert electrical signals to optical signals. The optical receiver circuitry may include decoding circuits configured to convert optical signals to electrical signals. The optical signals can be encoded and decoded using pulse width modulation schemes or amplitude modulation schemes.

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.

Provided is a photographing apparatus including an image capturing unit including a first light source, an object lens, and a first light detector, a surface detecting unit including a second light source, the object lens, and a second light detector, a processor configured to obtain a strong reflection signal area where a reflection signal is strong in an oblique plane image obtained from the second light detector, and obtain a relative position relationship between a region of interest and a focal plane of the object lens, and an actuator configured to adjust the region of interest to be in focus.

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 injection system can have a Syringe Dose and Position Apparatus (SDPA) mounted to a syringe. The SDPA can have one or more circuit boards. The SDPA can include one or more sensors for determining information about an injection procedure, such as the dose measurement, injection location, and the like. The SDPA can also include a power management board, which can be a separate board than a board mounted with the sensors. The syringe can also include a light source in the needle. Light emitted from the light source can be detected by light detectors inside a training apparatus configured to receive the injection. The syringe can have a power source for powering the sensors and the light source. The SDPA and the power source can be mounted to the syringe flange.

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.

Disclosed is an optical measurement system for measuring a topology of a surface of a substrate. The optical measurement system includes a light projector configured to project a light beam to the surface of the substrate and a light detector configured to receive the light beam from the light projector that has been reflected from the surface. It also includes a mirror relay comprising a convex mirror and a concave mirror arranged to reflect the light beam in a substantially radial direction and at least partially in a lateral direction to cause multiple lateral reflections between the concave mirror and the convex mirror that extend a path length of the light beam between the light projector and the light detector and increase a field of view of the optical measurement system at the surface.

The invention relates to a radiation measurement device comprising a scintillator (12) and a light detector (14), in which an optical pad (22) is arranged between the scintillator (12) and the light detector (14), and the optical pad (22) has a pot-shaped design and has a body (24) with a base (26) and a circumferential wall (28), in which the body (24) has a receiving area (30), the light detector (14) is at least partially accommodated in the receiving area. The invention also relates to an optical mat (22).

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 motor vehicle headlamp light intensity detection method and device, and the method comprises the steps: obtaining a vehicle front edge structure of a target motor vehicle, and carrying out the matching of a first millimeter wave radar array of which the detection range covers the vehicle front edge of the target motor vehicle; the position of a target motor vehicle is obtained in real time through a first millimeter wave radar array, when it is judged that the position of the target motor vehicle reaches a first preset detection position, high beam light intensity detection is triggered, light intensity distribution of a headlamp of the target motor vehicle on a light detector screen is collected, and light spot mass center coordinates are calculated; whether the deviation of the light spot centroid coordinates relative to the corresponding expected light spot centroid coordinates exceeds a preset deviation amount or not is judged; if so, repositioning to obtain a second detection position; and continuously judging whether the deviation of the light spot centroid coordinate relative to the corresponding expected light spot centroid coordinate exceeds a preset deviation amount, if so, generating a headlamp light abnormity prompt, and otherwise, finishing light intensity detection. According to the invention, the accuracy of light intensity detection can be improved.

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.