680 results about "Optical detectors" patented technology

An optical detector system providing electrical output signals. The system includes an apertured surface and a transparent window, with a metasurface on the window's opposite side. The metasurface imparts spatially varying phase delay and / or amplitude or polarization modulation to deflect ILR based on their angle of incidence, producing exiting light rays. These rays are detected by a two-dimensional tetralateral position-sensing detector (TLD) with a single resistive photo-absorption layer and four electrodes. The TLD generates X-Y position signals proportional to the azimuth and elevation of the incoming ILR. A computer may be included to calculate these angular values from the position signals.

In a general aspect, a quantum spectrum sensing system is presented. In some implementations, a quantum spectrum sensing system includes a laser system, a vapor cell sensor, and an optical detector. The laser system includes first and second lasers configured to generate a first and second laser signals. The laser system also includes first and second comb generators configured to produce first and second frequency comb signals based on the first and second laser signals, respectively. The laser system includes a frequency separator that can select frequency components of the second frequency comb signal and a frequency shifter that can shift the selected frequency components toward Rydberg states of a vapor. The vapor cell sensor can receive input optical signals from the laser system and produce output optical signals based on interactions of the vapor with the input optical signals. The optical detector can detect the output optical signals.

The invention provides a high-precision optical pose measurement method based on tower recovery, which adopts a close-range bidirectional optical cooperation mode, measures a mark point of a recovery tower through an optical detector on a rocket, and determines the distance and the pose of the rocket relative to the recovery tower; and the optical measurement system of the recovery tower synchronously detects and identifies the rocket and controls a capture arm and a buffer mechanism of the recovery tower to move, and optical measurement data of the recovery tower are fed back to the rocket and are integrated with optical measurement data on the rocket to control landing of the rocket. According to the invention, optical measurement and navigation are introduced into rocket tower type recovery, and the method has the advantages of high measurement precision, high data frequency, interference resistance and the like. The relative relation between the rocket and the recovery tower can be directly obtained through optical pose measurement, compared with inertial navigation, the coordinate conversion process can be reduced, and the advantage of no accumulated error is achieved. Compared with satellite navigation, optical pose measurement does not depend on external signals, and higher independence and electromagnetic resistance are achieved.

The invention relates to the technical field of optical wireless communication, in particular to an optical wireless communication device and method based on beam shaping, and the device comprises a beam shaping module which comprises at least one beam shaping lens so as to convert a beam outputted by a point light source into a uniformly distributed linear or planar light field; the optical transceiver module comprises a plurality of optical base stations, the optical base stations are arranged in a redundant mode in the extension direction of the communication scene, each optical base station integrates at least one optical transmitter, an optical detector and a plurality of prisms and is used for transmitting and receiving optical signals, and the coverage range of the single optical base station is expanded through the prisms; and the dynamic demodulation module is connected with the optical detector, and dynamically adjusts the demodulation threshold value of the corresponding bit error rate according to the real-time channel state. Therefore, when the technology is applied to wireless optical communication, the communication performance can be improved, the coverage distance can be increased, the coverage uniformity can be improved, the bit error rate can be reduced, the construction cost can be reduced, and the long-term stable communication requirement of a closed scene can be met.

A wearable device with a light source and an optical sensor. In some embodiments, a system includes a wearable device for being worn by a subject and for measuring a first biomarker of a blood vessel of the subject. The wearable device may include a first light source, and a plurality of optical detectors. The system may be configured: to perform a photoplethysmography measurement with each of the plurality of optical detectors, the first biomarker being a blood volume; or to perform a speckleplethysmography measurement with each of the plurality of optical detectors, the first biomarker being a blood flow velocity.

Embodiments herein relate to an optical chemical sensor system that is wearable and includes a microneedle array. In one embodiment, the invention includes a chemical sensing device having a set of microneedles and sensor elements. The sensor element may include a first low refractive index gel layer, a second low refractive index gel layer, and a chromogenic ionophore sensing film disposed between the first low refractive index gel layer and the second low refractive index gel layer. In one embodiment, a retardation layer may be disposed between the sensor element and a set of microneedles. An optical emitter may be configured to emit light into the sensor element. An optical detector may be configured to receive light from the sensor element. Other embodiments are also included herein.

The present disclosure provides a semiconductor structure and a system for manufacturing the semiconductor structure. The system includes a fabrication equipment, configured to perform operations to form a layer on a wafer; an exposure equipment, configured to perform patterning operations to form a pattern of the layer; and an alignment equipment, configured to detect an alignment of two overlay marks at different elevations on the wafer. The alignment equipment includes a stage, configured to support the wafer; an optical device, configured to emit a radiation to excite a photoluminescent material of one of the two overlay marks; an optical filter, configured to receive and filter a radiation emitted from the photoluminescent material; and an optical detector, configured to convert an optical signal filtered by the optical filter to an electrical signal.

In a general aspect, a quantum spectrum sensing system is presented. In some implementations, a system includes a laser system, a vapor cell sensor, an optical detector, and a signal processing system. The laser system includes a first laser that generates a first laser signal; a comb generator that produces a frequency comb signal based on the first laser signal; and a second laser generates a second laser signal. The vapor cell sensor includes a vapor and receives input optical signals based on the frequency comb signal and the second laser signal. The vapor cell sensor produces output optical signals based on interactions of the vapor with the input optical signals and electromagnetic radiation. The signal processing system processes the output optical signals to identifying signals in the electromagnetic radiation that are off resonance with a transition frequency between Rydberg states of the vapor.

The present application provides a chip appearance detection device, a chip, and a chip appearance detection method. The detection device includes: a chip clamping component and a first optical detector. The first optical detector is arranged on one side of the chip clamping component and is used to perform appearance detection on the chip on the chip clamping component at a first position; the chip clamping component includes: a rotating disk, positioning teeth and a fixed frame; the rotating disk is used to transfer the chip to a second position corresponding to the first position so that the first optical detector can perform appearance detection on the chip. The rotating disk is evenly provided with positioning teeth along the circumference, and the sides of the positioning teeth facing the fixed frame are provided with a shading portion, which is used to block the light transmitted through the chip; a fixed frame connected to the circumference of the rotating disk and a rotating space for the fixed frame to rotate to the shading portion are provided between adjacent positioning teeth, and the fixed frame is used to fix the chip. The shading portion is used to block the light transmitted through the chip circuit board, effectively image the chip appearance, and avoid light interference.

The invention discloses a wafer defect identification method and system under multi-feature fusion, and relates to the related field of semiconductor manufacturing, and the method comprises the steps: activating an optical detector to obtain an initial surface image of a target wafer, and carrying out the processing of the initial surface image according to a preprocessing strategy, and obtaining a target surface image; extracting a first image corresponding to the first structure from the target surface image, and constructing a first target image according to a plurality of crystal grain images in the first image; and comparing the first target graph with the first standard graph to obtain a first defect graph, and obtaining a defect identification result of the target wafer based on the first defect graph. The technical problem that existing wafer defect recognition is insufficient in recognition accuracy and robustness is solved, and the technical effect of improving the accuracy and robustness of defect recognition is achieved.

Systems and methods for optically sensing medicament concentrations within medicament delivery devices are disclosed. A medicament delivery device can include a fluid path comprising a reservoir in fluid communication with an outlet port, in which the device is actuatable to drive fluid through the fluid path, from the reservoir and out of the outlet port. A sensor assembly of the delivery device is configured to determine concentration of an analyte in the fluid. The sensor assembly includes an optical emitter configured to emit photons towards a fluid sample within the fluid path, an optical detector configured to receive photons passed through and / or reflected from the fluid sample and provide a detector signal, and one or more signal processing components configured to receive the detector signal and, based at least in part on the detector signal, provide an indication of the analyte concentration in the fluid sample.

In a general aspect, a quantum spectrum sensing system is presented. In some implementations, a system includes a laser system, a vapor cell sensor, an optical detector, and a signal processing system. The laser system includes a first laser that generates a first laser signal; a comb generator that produces a frequency comb signal based on the first laser signal; and a second laser generates a second laser signal. The vapor cell sensor includes a vapor and receives input optical signals based on the frequency comb signal and the second laser signal. The vapor cell sensor produces output optical signals based on interactions of the vapor with the input optical signals and electromagnetic radiation. The signal processing system processes the output optical signals to identifying signals in the electromagnetic radiation that are off resonance with a transition frequency between Rydberg states of the vapor.

A system for monitoring a petrochemical installation is disclosed. The system can include an optical imaging system comprising an array of optical detectors. The system can comprise processing electronics configured to process image data detected by the optical imaging system. The processing electronics can be configured to detect a target species based at least in part on the processed image data. The processing electronics can further be configured to, based on a detected amount of the target species, transmit an alarm notification to an external computing device over a communications network indicating that the target species has been detected at the petrochemical installation.

A stimulated Raman photothermal (SRP) microscope for imaging a sample. A first optical source without an optical resonator emits a pump beam. A second optical source emits an intensity-modulated Stokes beam. The Stokes beam is combined with the pump beam to form a combined beam. The combined beam is directed to the sample to induce a thermal effect caused by the stimulated Raman process. A third optical source emits a probe beam, the probe beam is directed to the sample. An optical detector detects modulation of the probe beam after modulation by the sample to measure an SRP signal. Because noise in the pump and Stokes beam do not significantly effect the measurements from the probe beam, these beams can use a high-powered optical parametric amplifier (OPA) source for improved sensitivity and imaging speed compared to SRP microscopes using an optical parametric oscillator (OPO) source.

In accordance with one aspect of the present invention, an optical coherence tomography-based ophthalmic testing center system includes an optical coherence tomography instrument comprising an eyepiece for receiving at least one eye of a user or subject; a light source that outputs light that is directed through the eyepiece into the user's or subject's eye, an interferometer configured to produce optical interference using light reflected from the user's / subject's eye, an optical detector disposed so as to detect said optical interference; and a processing unit coupled to the detector. The ophthalmic testing center system can be configured to perform a multitude of self-administered functional and / or structural ophthalmic tests and output the test data.

The utility model relates to the technical field of optical communication, and relates to an optical switch module and a test system. The optical switch module comprises an optical signal input end, a plurality of optical transmitting ports, a plurality of optical receiving ports, a first optical splitter, a first optical switch, a second optical switch, a first optical detector, a second optical detector and a third optical detector, the first optical switch can be controlled to switch output channels, and the second optical switch can be controlled to switch input channels; an optical signal input by the optical signal input end is split by the first optical splitter, one optical signal is transmitted to the to-be-detected input port from one optical transmitting port through the first optical switch, and the other optical signal is transmitted to the first optical detector; an optical signal output by the corresponding to-be-detected output port is input from one optical receiving port and then is transmitted to the second optical detector through the second optical switch; an optical signal incident from the optical emission port is transmitted to the first optical splitter through the first optical switch for light splitting, and one path of optical signal is transmitted to the third optical detector. The test efficiency can be improved, and the cost can be reduced.

An aspect of the disclosure provides a non-invasive intracranial pressure sensing apparatus comprising an interferometric near infrared spectroscopy, iNIRS system, the iNIRS system comprising: a light emitting arrangement comprising: a light source configured to emit light; a sample delivery channel coupled to the light source and arranged to be coupled to the subject's scalp to direct light from the light source towards the subject's brain tissue; and a reference channel coupled to the light source for receiving light therefrom; a light detecting arrangement configured to be coupled to the subject's scalp and the light emitting arrangement, the light detecting arrangement comprising an interferometric optical detector configured to receive: (i) reference light from the reference channel, and (ii) sample light from the subject's brain, the sample light comprising light emitted from the light source; wherein the optical detector is arranged to combine the sample light with the reference light to provide combined light signals comprising one or more components at a beat frequency between sample light and reference light; and wherein the sensing apparatus comprises a controller configured to process data indicative of the combined light signals to determine an indication of intracranial blood pressure for the subject based on at least one property of a pulsatile waveform of one or more identified pulses of blood flow through the subject's brain.

The invention relates to the technical field of magnetometers, and discloses a magnetic sensor system based on free induction attenuation and a use method thereof. The sensor system comprises a laser generator, an atomic gas chamber, a strong magnetic generator, a polarizer, a polarization analyzer and a first light detector, a light splitting device is arranged between the laser generator and the atomic gas chamber, laser emitted by the laser generator can be split into a first part of laser and a second part of laser, the first part of laser enters the atomic gas chamber, and the second part of laser enters the atomic gas chamber; and enabling the second part of laser to enter a second optical detector. Once the frequency of the laser generated by the laser generator changes, the proportion of the first part of laser to the second part of laser changes, and the feedback adjustment module feeds back and adjusts the laser generator according to the detection result of the second optical detector, so that the laser emitted by the laser generator is the laser with the preset frequency. Therefore, the laser emitted by the laser generator can be quickly and precisely adjusted, and the detection precision of the whole magnetic sensor system is further improved.

The invention discloses a bridge type structure micro-bolometer based on a Mn-Co-Ni-O thin film and a preparation method of the bridge type structure micro-bolometer. According to the method, a Mn-Co-Ni-O post-high-temperature annealing process is considered, annealing is carried out on the suspension structure where the sacrificial layer is released, an organic sacrificial layer material release process is compatible, and the problem that cracks are generated in Mn-Co-Ni-O manufacturing due to tension and compression stress of materials of all layers of a substrate at a high temperature is minimized through annealing of the suspension structure; a bridge type structure based on Mn-Co-Ni-O is provided, and the limitation that traditional Mn-Co-Ni-O can only adopt an organic sacrificial layer and back digging to carry out thermal isolation design is eliminated; the F-P resonant cavity resonance absorption structure based on Mn-Co-Ni-O is successfully manufactured, traditional self-absorption based on a Mn-Co-Ni-O thick film is replaced, and the heat capacity of a device is reduced while absorption is enhanced by adopting a thin film optical structure; the applicable scene of the invention can be expanded to all cantilever or film-suspending micro-nano devices, such as inertial sensors, pressure sensors, chemical / biological sensors and optical detectors of other principles.

In a general aspect, a quantum spectrum sensing system is presented. In some implementations, a quantum spectrum sensing system includes a laser system, a vapor cell sensor, and an optical detector. The laser system includes first and second lasers configured to generate a first and second laser signals. The laser system also includes first and second comb generators configured to produce first and second frequency comb signals based on the first and second laser signals, respectively. The laser system includes a frequency separator that can select frequency components of the second frequency comb signal and a frequency shifter that can shift the selected frequency components toward Rydberg states of a vapor. The vapor cell sensor can receive input optical signals from the laser system and produce output optical signals based on interactions of the vapor with the input optical signals. The optical detector can detect the output optical signals.

The invention relates to the technical field of detection devices, and discloses a textile fiber component detection device and method, and the device comprises an optical detector which is used for imaging and photographing the surface of textile cloth. When a first magnetic ring is attracted by the magnetic force of a second magnetic ring, textile cloth can be tightly pressed on the upper surfaces of a first arc block and a second arc block, friction force is generated between the textile cloth and the first arc block and friction force is generated between the textile cloth and the second arc block, and when the first arc block and the second arc block move in the direction away from the second magnetic ring, the textile cloth is fixed. Through the arrangement, when the textile cloth is straightened and flattened, the tensile force on the surface of the textile cloth is more uniform, bending wrinkles caused by uneven tensile force on the local surface of the textile cloth are avoided, and it is ensured that under detection of an optical detection lens, fiber types or surface characteristics of the textile cloth are clear; the accuracy of a detection result is ensured.

An optical navigation device includes a case, an illumination light source, an illumination lens, an optical detector and a first optical element. The case is movably located above a navigation surface. The illumination light source is disposed inside the case and adapted to emit an illumination beam. The illumination lens is disposed under the illumination light source and has an output surface. The illumination beam passes through the output surface to project onto the navigation surface. The optical detector is disposed inside the case and adapted to detect a reflection beam from the navigation surface. The first optical element is disposed adjacent to the output surface of the illumination lens and extended to an outer edge of the illumination lens, and adapted to eliminate a stray light beam generated by the illumination beam propagated between the illumination lens and the navigation surface from reaching the navigation surface.

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 an optical fiber-based equipment deformation real-time monitoring method and equipment, and belongs to the technical field of equipment monitoring, and the method comprises the steps: laying an optical fiber sensor on the surface or in the equipment according to the structural characteristics, stress distribution and deformation expected direction of the to-be-monitored equipment; when the equipment is in a non-deformation state or a known deformation state, collecting initial optical signal data reflected or transmitted by the optical fiber through an optical detector; in the equipment operation process, optical signals are continuously injected into the optical fibers, and the optical signals reflecting equipment deformation are collected in real time and preprocessed; feature parameters related to equipment deformation are extracted from the preprocessed optical signals, and the real-time deformation of the equipment is calculated; comparing the calculated real-time deformation amount with a preset deformation safety threshold value; if the real-time deformation exceeds a safety threshold value, sound-light alarm, short message notification or remote control shutdown is triggered immediately, and deformation data and early warning information are stored in a database. According to the invention, comprehensive data support is provided for state evaluation and fault diagnosis of equipment.

The invention discloses an optical sensing system based on double Fabry-Perot cavities. The optical sensing system comprises a laser module, a main light path module and a reference light path module, wherein the laser module is used for generating two laser beams which respectively enter a main light path and a reference light path; the reference light path module is used for providing a light source fluctuation reference signal for noise compensation; the main light path module comprises a double Fabry-Perot cavity sensing unit, a total reflection mirror, a focusing lens, a grating spectrometer, an optical detector and a signal processing unit. A double-Fabry-Perot cavity sensing unit in the main light path module adopts a novel micro-hemisphere double-cavity interference structure, and temperature and pressure changes are tested in combination with a synchronous resolving method. According to the technical scheme provided by the invention, the synchronous high-precision measurement of the temperature and the pressure can be realized by optimizing the structural design of the cavity, deepening the coupling effect of the gas medium and the physical quantity and introducing a high-precision decoupling algorithm and a noise suppression mechanism, and the application requirements of complex and harsh scenes are met.

Embodiments of the present application provide an optical device, a board, and an optical network. The optical device comprises optical modules, and can effectively reduce the power consumption of the optical modules and reduce the heat-dissipation difficulty of the optical modules. The optical device comprises a forwarding module, N processing modules, and M optical modules, where N and M are each any integer greater than 1. The forwarding module is connected to each of the N processing modules. The N processing modules comprise a target processing module, and the M optical modules comprise a target optical module. The target optical module comprises an optical modulator, and the optical modulator is connected to the target processing module via a first physical link, or, the target optical module comprises an optical detector, and the optical detector is connected to the target processing module via a second physical link.

In a first aspect of the disclosure there is provided a multi-spectral optical sensor comprising: a monolithic semiconductor chip defining a plurality of subarrays of optical detector regions, each array comprising the same number and relative spatial arrangement of optical detector regions; a plurality of optical filters; and a plurality of lens elements, wherein each optical filter is positioned between a corresponding lens element and a corresponding subarray of optical detector regions such that light from a scene incident on any one of the lens elements along a direction of incidence propagates through the corresponding optical filter towards a corresponding one of the optical detector regions of the corresponding subarray of optical detector regions, which corresponding one of the optical detector regions depending on the direction of incidence, and wherein the incident light forms an out-of-focus image of the scene at a plane of the optical detector regions.

A stimulated Raman photothermal (SRP) microscope for imaging a sample. A first optical source without an optical resonator emits a pump beam. A second optical source emits an intensity-modulated Stokes beam. The Stokes beam is combined with the pump beam to form a combined beam. The combined beam is directed to the sample to induce a thermal effect caused by the stimulated Raman process. A third optical source emits a probe beam, the probe beam is directed to the sample. An optical detector detects modulation of the probe beam after modulation by the sample to measure an SRP signal. Because noise in the pump and Stokes beam do not significantly effect the measurements from the probe beam, these beams can use a high-powered optical parametric amplifier (OPA) source for improved sensitivity and imaging speed compared to SRP microscopes using an optical parametric oscillator (OPO) source.

An optical detector for detecting a coolant leak from a liquid cooling system within an information handling system includes a light source and a sensor configured to absorb light emitted from objects illuminated by the light source. A first flexible waveguide is communicatively coupled to the light source, and a second flexible waveguide is communicatively coupled to the sensor. The optical detector is configured to detect a potential coolant leak in response to the sensor absorbing light having a predetermined characteristic. The light is reflected from an object illuminated by the first flexible waveguide. The reflected light is transmitted to the sensor via the second flexible waveguide.

A pressure measurement system includes a pressure pod with two chambers separated by a diaphragm such that a deformation / movement of the diaphragm is indicative of a difference between the pressures of the two chambers. Such deformation / movement is detected by a device that has no physical contact with the diaphragm, for example, by an optical detector that detects a change in the shape of the diaphragm or a movement of a protrusion on the diaphragm.