455 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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Optical calibration structures for optical probes, optical probe systems that include the optical calibration structures, and methods of calibrating a plurality of optical probes. The optical calibration structures include a reflector, an obstructive structure, and an optical detector. The optical probe systems include the optical calibration structure, a chuck, an optical assembly, and a signal generation and analysis assembly. The methods include methods of operating the optical probe systems and / or methods of utilizing the optical calibration structures.

The invention relates to the technical field of crystal growth control, in particular to a multi-sensor-based crystal growth furnace temperature control system, which comprises a crystal unit, a heating unit, a stirring unit, a gas conveying unit, a lifting unit, a temperature acquisition unit, a saturation accounting unit, an identification unit and an analysis unit, wherein the crystal unit is provided with a sublimation area and a seed crystal area; the temperature acquisition unit detects temperature distribution and gradient through multiple sensors; the saturation accounting unit and the recognition unit are used for calculating the solution supersaturation degree and monitoring crystal contour features through an optical detector respectively; the analysis unit is used for determining the growth rate according to the contour characteristics, judging the crystal quality by comparing the overlap ratio of an actual growth curve and an expected growth curve, intelligently diagnosing reasons when the crystal quality is unqualified, adjusting the gas phase conveying rate aiming at the impurity enrichment problem to improve stirring, correcting the temperature ratio between regions aiming at the heat dissipation problem, and realizing multi-parameter linkage regulation and control.

The apparatus (10) for measuring the performance of an optical detector (20) comprises: - Cryostat (17) - a holder (19) capable of receiving a detector (20), fixed inside the cryostat (17); - means for measuring the performance of the detector (20); a shield (12a-12b) arranged around the holder (19) capable of limiting radiation that may reach the holder in the wavelength range of the detector (20); - a single-mode optical fiber (16) in the wavelength range of the detector (20), inserted into the opening (15) of the cryostat (17); at least one light flux generating module (50) incorporating a fiber light source (23) capable of generating a light flux in an optical fiber (16); Equipped with.

A microscopy system (1) is provided for imaging a sample. The microscopy system comprises a light source system (10) configured for providing a first train of optical pulses (T1) at first optical center wavelengths (l1) and a second train of optical pulses (T2) at second optical center wavelengths (l2), both at a first repetition frequency (f1). A repetition rate multiplier (30) is configured to receive the first train of optical pulses (T1) and to output a third train of optical pulses (T3) at a second repetition frequency (f2) different from the first repetition frequency (f1), focusing optics (40) configured to direct the second train of optical pulses (T2) and the third train of optical pulses (T3) to a sample in a focal volume (5). The microscopy system comprises an optical detector (60) configured to detect a transmitted or reflected third train of optical pulses (T31) after interaction in the sample in the focal volume, and a processor (80) configured to process signal components at the first repetition frequency (f1) from the detected transmitted or reflected third train of optical pulses (T31) and to output a signal or a pixel representative of the interaction in the sample.

An X-ray detector comprising a semiconductor detector layer coupled with a light-emitting diode (LED) layer on the optical side. The detector features an X-ray-side electrode layer deposited on one side of the semiconductor detector layer and an optical-side electrode layer, such as transparent Indium Tin Oxide (ITO), on the opposite side. The semiconductor detector layer is composed of a high atomic number (Z) material with high density and electrical resistivity (around or larger than 106Q·cm) to effectively absorb X-ray radiation while minimizing dark current. A fiber optic plate is used to guide the light generated in the LED layer to an optical detector.

The invention relates to a scanning device, in particular a laser scanner. The scanning apparatus includes: a detector device having a plurality of optical detectors; a scanning module designed to vary the position and / or orientation of the field of view of the detector device to define a corresponding scanning area; and an evaluation unit, which is designed to obtain information of an object in the scanning range of the scanning device on the basis of the combined detection signals of the detectors. According to the invention, the optical detectors of the detector arrangement are designed in the form of at least two detector arrays which are oriented in the same direction as one another, each detector array having at least three linear optical detectors which are adjacent to one another. According to the invention, the so-called detector array is arranged on a common circular ring, which extends perpendicular to the common orientation of the so-called detector array.

The invention belongs to the technical field of optical detectors. The invention provides a preparation method of a broadband optical detector for dynamic encryption communication. The preparation method comprises the following steps: S1, providing a SiO2 / Si substrate; s2, sequentially transferring a first transition metal sulfide and a second transition metal sulfide on the SiO2 / Si substrate in a directional transfer manner to form a transition metal sulfide layer; s3, spin-coating a PbSe QDs solution or a PbS QDs solution on the transition metal sulfide layer to form a quantum dot film with uniform quantum dots; s4, an EDT acetonitrile solution is dropwise added to the surface of the quantum dot thin film, standing reaction is conducted for preset time, and then spin coating is conducted to remove redundant ligands and reaction by-products; and S5, placing the mixed dimension quantum dot / transition metal sulfide heterostructure optical detector on a heating table for annealing treatment to complete the preparation of the mixed dimension quantum dot / transition metal sulfide heterostructure optical detector. Wherein the energy barrier at the quantum dot / transition metal sulfide heterostructure can be independently and cooperatively regulated and controlled through the drain-source voltage and the gate-source voltage, and the confidentiality of the photoelectric detector can be improved.

Provided in the present disclosure is an optical detector, comprising: N detectors, the detectors being configured to receive optical signals and output electrical signals, and N being an integer greater than 1; a signal processing circuit, which is connected to the N detectors in a direct-current coupling manner, and is configured to acquire the electrical signals; and a switching group, which is connected to the N detectors and the signal processing circuit, and is configured to connect a target detector to the signal processing circuit, the target detector comprising one or more of the N detectors. The optical detector and a LiDAR provided in the present disclosure can realize gating of target detectors, thereby avoiding crosstalk, and having good detection performance for low-frequency signals.

An optical wear sensor (1) for identifying the extent of wear of mining or similar equipment. The sensor (1) includes a probe (5) having one or more optical element (10), a deflector (4), and a transmitter / detector, and a base (6) which includes a processor (81) and wireless transmitter (33). The optical element (1) is provided within a body of a wear part (11) and has a first end and a second end defining a bi-directional optical signal transmission pathway (3). The optical deflector (1) is formed of deflective material and positioned at said second end of said optical element (10) to reflect the optical signal. The optical transmitter (18) / detector (19) is configured to transmit said optical signal from the first end of said optical element (1), and detect whether or not said optical signal is returned via said optical pathway to said first end of said optical element (10). The processor converts any optical signal received by said optical detector to an electrical response signal, and the wireless signal transmitter (33) transmits the electrical response signal indicative of the wear condition of said body (11) to an output device. A plurality of optical elements (10a - 10e), of differing lengths may be provided to identify the depth or extent of wear.

A method for imaging an object illuminated with natural light including arranging an optical filter in an optical path of at least a portion of the natural light that is reflected and / or refracted or scattered from the object; arranging an optical detector in an optical path of light at least one of reflected from and / or transmitted through the optical filter; detecting, using the detector, individual photons for a time period to provide a times series of individual photon events; segmenting the time series into a plurality of bins; determining a number of detected photons within each bin to provide a time series of photon counts per bin; replacing and / or reconfiguring the optical filter a plurality of times followed by detecting, segmenting and determining to obtain a plurality of times series of photon counts per bin; and forming an image of the object based on the plurality of times series.

The invention relates to an electronic device for analyzing (1) an analyte (2) present in a fluid, comprising: - a sensor (10) having a photonic chip (12) comprising a light guide (13) in which are arranged receptors (14) capable of interacting with the analyte present in the fluid, the interaction causing a change in local properties, and - a sensor support (50); - a closure element (60); - a transducer for changing local properties capable of converting the change in local properties into an electronic signal expressing the change in local properties, this transducer comprising: - a light source (130); - an optical detector (131), the light guide comprising an interference arm (134) in which a resulting light beam is guided, characterized in that the luminous power of the resulting light beam guided in the interference arm is greater than or equal to 0.2 µW. Abstract figure: Figure 1

The application provides a liquid crystal module optical detection device and a liquid crystal module detection equipment. The device comprises a feeding assembly, a detection assembly and a discharging assembly. The feeding assembly comprises a feeding transmission belt and a feeding mechanical arm. The detection assembly comprises a detection base, a detection index plate, a module deviation corrector and an optical detector. The module deviation corrector and the optical detector are arranged on the detection base. The discharging assembly comprises a discharging transmission belt and a discharging mechanical arm. The discharging mechanical arm is arranged on the detection base and is used for grabbing the liquid crystal module on the detection index plate to the discharging transmission belt. The liquid crystal module is conveyed to the detection index plate by the feeding mechanical arm. The detection index plate sequentially passes through the module deviation corrector and the optical detector, so as to correct the position deviation of the liquid crystal module and automatically detect the liquid crystal module. Manual detection is not needed, the detection efficiency of the liquid crystal module is effectively improved, and the production cost of the liquid crystal module is effectively reduced.

The optical gas sensor comprises a light detector and a circuit board, the light detector comprises a light detection part, a light filtering part, an integrated circuit chip and a packaging part, and the integrated circuit chip is electrically connected with the light detection part. The optical gas sensor provided by the invention comprises the optical detector, the optical detector comprises the optical detection part and the integrated circuit chip capable of processing the electric signal, and the optical detection part and the integrated circuit chip are both located in the packaging part, so that the influence of the outside on the electric signal processing of the optical gas sensor is reduced. The invention further provides an optical detector capable of reducing the influence of the outside on electric signal processing.

An apparatus monitoring semiconductor manufacturing equipment includes an optical detector, a light generator generating light along an optical path towards a semiconductor substrate, a first grating reticle between the light generator and the semiconductor substrate and including first slits having a first pitch and second slits having a second pitch different from the first pitch, a second grating reticle between the semiconductor substrate and the optical detector and including third slits having a third pitch different from the first pitch and the second pitch, in which the optical detector determines a positional attribute of the semiconductor substrate in relation to a first pattern and a second pattern, the first pattern corresponds to a first portion of light sequentially passing through the first slits and the third slits, and the second pattern corresponds to a second portion of light sequentially passing through the second slits and the third slits.

The application discloses a kind of semiconductor laser system and return light protection method.It includes laser, transmission fiber, processing head and drive control system, drive control system includes drive module and control module.Laser chip emits laser, and after shaping mirror group is shaped, it is coupled into transmission fiber, and from transmission fiber to processing head;Drive module provides operating current to laser chip;Control module monitors the operating voltage of laser chip in real time, when the operating voltage monitored exceeds preset safety threshold, sends off signal to drive module;Drive module receives off signal and cuts off the drive current output to laser chip.The application does not need additional optical detector and expensive magneto-optical isolator, directly monitors laser chip voltage parameter, only realizes return light protection by circuit module, simple structure, easy to integrate, low in cost, response is fast, can identify return light in time and execute protection, avoid laser chip to suffer persistent damage.

Optical frequency reference apparatus (10) comprising - an atomic vapor cell (1), containing a vapor of reference atoms, said atomic vapor cell (1) comprising a first end (41) having a first window (4) and a second end (61), - a laser source (11) for generating a laser probe beam (3) adapted to excite a two-photon optical transition of said reference atoms, - an optical detector (14), adapted to detect a fluorescence signal emitted by said reference atoms, and - at least one reflective element (5, 15) wherein the laser source (11), the atomic vapor cell (1) and the at least one reflective element (5, 15) are configured such that, in operation, the probe beam (3) enters the atomic vapor cell (1) through said first window (4) at said first end (41) and crosses said vapor of reference atoms until said second end (61) through a defined optical path in a first forward direction (3a), the probe beam (3) is reflected backwards by said at least one reflective element (5, 15) and crosses said vapor of reference atoms a second time through the same defined optical path, in a second direction (3b) opposite to the first forward direction (3a), characterized in that the optical frequency reference apparatus (10) further comprises means (7, 9) for absorbing the reflected laser probe beam (3) exiting from the atomic vapor cell (1) according to the second direction (3b).

The application discloses a phase modulation based dual-comb spectrum measurement system and method. In the measurement system: a dual-comb generating unit generates two sets of optical frequency combs with slightly different repetition frequencies, there is a set of optical comb teeth with equal absolute values of optical frequency difference between the two sets of optical frequency combs, a signal generator generates a modulation signal to modulate the optical phase difference between the optical frequency comb 1 and the optical frequency comb 2, at least one of the two optical frequency combs is input into a unit to be measured and output, and the two optical frequency combs are jointly input into an optical detector to generate a measurement signal through beat frequency, in the beat frequency process, the set of optical comb teeth with equal absolute values of optical frequency difference will beat the same frequency component and superimpose to form the measurement signal; and a data acquisition and processing unit samples and processes the measurement signal to obtain the spectrum information of the unit to be measured. The application can eliminate the same frequency beat frequency aliasing generated by the beat frequency of the set of optical comb teeth with the same optical frequency difference by using the changing optical phase difference between the two sets of optical frequency combs, and the technology can be used for simple, low-cost and easily integrated dual-comb spectrum measurement.