77results about "Photometry using reference value" patented technology

The invention relates to the technical field of LED display testing, in particular to an LED screen backlight module performance testing system which comprises the steps that a model identification code of a module to be tested is received, a corresponding standard optical parameter set is called, and initial driving current is applied. Actual optical signals driven by different currents are collected through a light sensing probe array and converted into a digital optical measurement value set containing brightness and color coordinate values of multiple sampling points. Comparing the brightness measurement value with a target brightness value point by point to generate a brightness consistency deviation matrix; and judging the color coordinate measurement value and the target range, and generating a color coordinate qualified identifier list. And calculating an actual brightness uniformity value according to the deviation matrix, and comparing the actual brightness uniformity value with a standard threshold value. And if the actual brightness uniformity value reaches the standard and the color coordinates of all the sampling points are qualified, generating a module qualification judgment instruction. According to the system, automatic and high-precision comprehensive evaluation of brightness space uniformity and chromaticity consistency of the backlight module is realized.

The application discloses an AOI equipment light intensity curve generation method, system and device and a storage medium, relates to the technical field of light intensity curve generation, and comprises the following steps: in the optical scene of the randomly selected wavelength filter, the optical attenuating sheet placed in the first gear and the second gear and the illumination light source output power increased in the first preset step, the first reference curve and the second reference curve are determined based on the light power value under different illumination light source output powers; the target reference curve is determined according to the first reference curve and the second reference curve; in the optical scene of the reference wafer, the optical attenuating sheet placed in the first gear or the second gear and the illumination light source output power increased in the second preset step under different preset target objectives and the corresponding target wavelength filter, the light intensity curve vertex value is determined based on the reference wafer image gray value, the target reference curve and the preset coefficient; and the target light intensity curve is determined according to the light intensity curve vertex value and the target reference curve. The application can efficiently generate the light intensity curve with strong universality.

Provided are an optical measurement device, an optical measurement method, a data processing device, and a program, capable of generating data that is a stimulus value that takes into account the time response of an eye and suppresses waveform distortion, capable of performing good flicker measurement, and also capable of coping with a measurement target object having a non-periodic light emission waveform. A stimulus value acquisition unit (20) receives light from a measurement target object to continuously acquire intensities corresponding to stimulus values at constant time intervals; a response characteristic acquisition unit (32) acquires a pulse response characteristic from a storage unit (31) that stores a pulse response characteristic corresponding to a visual stimulus response; and a digital filter processing unit (32) performs digital filter processing on continuous data of the acquired stimulus value intensities using the acquired pulse response characteristic to generate data on which a visual stimulus response is superimposed.

A light detection element include: a magnetic element, a capacitor, and a resistor, wherein the magnetic element and the capacitor are connected in series, the resistor is connected to the magnetic element and the capacitor in parallel, the magnetic element includes a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, and the magnetic element is configured to be irradiated with a light containing an optical signal with a change of intensity of the light.

The invention provides a photoelectric detector responsivity testing device, a photoelectric detector responsivity testing method and a wafer. The responsivity of a to-be-tested photoelectric detector can be accurately and rapidly tested with low testing cost. In the responsivity testing device, a first reference photoelectric detector and a to-be-tested photoelectric detector are respectively connected to different output ends of a 1 * N optical splitter, and a light current testing module respectively tests light currents of the first reference photoelectric detector and the to-be-tested photoelectric detector and outputs the light currents to a responsivity calculation module. The responsivity calculation module calculates the responsivity of the to-be-detected photoelectric detector based on the reference responsivity of the first reference photoelectric detector, the corresponding light splitting proportions of different output ends of the 1 * N light splitter, and the ratio of the photocurrent of the to-be-detected photoelectric detector to the photocurrent of the first reference photoelectric detector.

A multispectral sensor device may include a sensor array comprising a plurality of channels and one or more processors to determine that a time-sensitive measurement is to be performed, wherein the time-sensitive measurement is to be performed using data collected by one or more channels of the plurality of channels; cause the data to be collected by a proper subset of channels, of the plurality of channels, wherein the proper subset of channels includes the one or more channels; and determine the time-sensitive measurement based on the data.

Aspects of the present disclosure include methods for determining parameters of a photodetector (e.g., a photodetector in a particle analyzer). Methods according to certain embodiments include illuminating a photodetector positioned in a particle analyzer with a light source (e.g., a continuous wave light source) at a first intensity for a first predetermined time interval, illuminating the photodetector with the light source at a second intensity for a second predetermined time interval, integrating a data signal from the photodetector over a time period including the first and second predetermined time intervals, and determining one or more parameters of the photodetector based on the integrated data signal. The present disclosure also describes systems (e.g., particle analyzers) having a light source and a photodetector for implementing the subject methods. The present disclosure also provides non-transitory computer readable storage media having stored thereon instructions for determining parameters of a photodetector according to the subject methods.

The invention relates to the technical field of semiconductors, and discloses a double-gate two-dimensional transistor for multifunctional storage and logic calculation, which comprises a substrate, a floating gate layer, a tunneling layer, a channel layer, a top gate insulating layer, a bottom gate electrode, a top gate electrode, a source electrode and a drain electrode, the substrate is an N-type single-polished silicon oxide wafer, the floating gate layer is a graphene layer, the tunneling layer is a hexagonal boron nitride layer, the channel layer is a molybdenum disulfide layer, and the top gate insulating layer is a hexagonal boron nitride layer; the floating gate layer is arranged on the upper surface of the substrate, the tunneling layer covers the upper surface of the floating gate layer, the channel layer is arranged on the upper surface of the tunneling layer, and the top gate insulating layer covers the upper surface of the channel layer. By means of a heterogeneous stack structure of h-BN / MoS graphene and a double-gate independent regulation and control mechanism, single device integration of light perception, nonvolatile storage and logic operation is achieved, additional splicing links of sensing, storage and calculation units in a traditional system are omitted, and a hardware architecture is greatly simplified.

The invention discloses a Mini-LED backlight display halo perception boundary determination method and system, and aims to solve the problem that a halo boundary in a high dynamic contrast display scene is difficult to objectively define. The method comprises the following steps: acquiring brightness distribution of a display area and a surrounding dark area in a dark environment; guiding an observer to determine a subjective halo boundary position under a standard observation condition; mapping the position to objective brightness data to extract a boundary brightness threshold value; and establishing a sensing boundary model based on multiple groups of peak brightness and boundary thresholds, wherein the sensing boundary model is used for stably determining a halation region which can be sensed by human eyes under different brightness, partition and dimming strategies. According to the method, the perception boundary is used for replacing a fixed absolute threshold value, evaluation consistency is remarkably improved, closed-loop association of subjective perception and objective data is achieved, and reproducible and computable standardized criteria are provided for halo evaluation, algorithm optimization and production line quality control.

A method for determining natural illumination duration and an electronic device are provided, to more accurately determine a scenario in which a user is located and effectively determine natural illumination duration, to help the user improve vision. The method is applied to an electronic device having a display screen and includes: determining a current scenario based on a preset reference factor (S901), where the preset reference factor includes any one or more of ultraviolet intensity, illumination intensity, and locating signal strength; and counting current natural illumination duration towards cumulative natural illumination duration if the current scenario is a preset scenario (S902), where the preset scenario includes any one or more of an outdoor scenario, an indoor near-window scenario, and an outdoor blocked scenario.

A system including a first laser source configured to generate a first laser beam in a pulsed form, and a second laser source configured to generate a second laser beam. The system further includes an optical fiber configured to: receive the first laser beam, output the first laser beam from a distal end of the optical fiber; receive the second laser beam, output the second laser beam from a distal end of the optical fiber, receive a reflected portion of the second laser beam that is reflected back into the distal end of the optical fiber, and direct the reflected portion of the second laser beam to the optical detector. The optical detector is configured to receive the reflected portion of the second laser beam from the optical fiber and generate an optical detector output based on the reflected portion of the second laser beam.

The invention relates to a device (10) for determining the power of a laser beam (14). The power of a first partial beam (18a) of the laser beam (14) is determined by a first partial power meter (12a), the laser beam (14) being split into the first partial beam (18a) and the main beam (20). The device (10) has a calorimetric power meter (22) having a beam well (36) for absorbing a main beam (20) of the laser beam (14), the calorimetric power meter (22) being arranged downstream of the first partial power meter (12a) in the beam direction of the laser beam (14). A cooling medium (42) of the cooling system (40) is used to absorb thermal energy of the calorimetric power meter (22), which thermal energy is generated as a result of the main beam (20) being incident on the calorimetric power meter (22). In order to determine the temperature difference between the cooling medium (42) and the calorimetric power meter (22) before and after the thermal energy exchange, the calorimetric power meter (22) has a temperature measuring system (58). A control device (62) of the device (10) is designed to calorimetrically determine the power of the main beam (20) from a measured value of the cooling medium (42) during the cooling process.

The invention discloses a water body scattering in-situ measurement method and device based on multidirectional data synchronization, and the method comprises the steps: obtaining corresponding signals of a reference channel and a plurality of collection channels through a data collection module, and enabling the plurality of collection channels to respectively correspond to water body measurement regions in different directions around an underwater robot; collected signals are sent to a processing unit after being subjected to automatic gain control and high-speed analog-to-digital conversion, the back scattering intensity of water body particles at different distances and in different directions is obtained, the back scattering intensity is synchronized with time, position and depth information of an underwater robot, and all-directional full-time monitoring of the water body scattering characteristics is achieved. Meanwhile, on the basis of a homologous sampling clock and unified triggering, an initial delay reference of each acquisition channel relative to a reference channel is obtained through a common calibration pulse, and the initial delay reference is processed based on a time alignment method of a narrowband pilot signal; therefore, sub-sampling-level time synchronization of multi-channel sampling data is realized under a long-term operation condition.

The application discloses a kind of illumination calibration method, device, system and nonvolatile storage medium.Therein, the method comprises: the first light intensity of the preset light source on the standard surface is collected, and the second light intensity of the preset light source on the target surface;According to the first light intensity and the second light intensity, the compensation mode corresponding to the target surface is determined;The original light intensity of the target light source to be detected on the target surface is obtained;Based on the original light intensity and the compensation mode, the target light intensity corresponding to the target light source is determined.The application solves the technical problem that the material and color of light reflection surface can affect the collected light intensity data, resulting in that the obtained light intensity data is not accurate enough.

A method for calibrating a detector device under test includes emitting laser pulses by a first set of laser sources of laser sources in a first time slot and laser pulses by a second set of laser sources of the laser sources in a second time slot different from the first time slot. The first laser pulses and the second laser pulses combine for a first combined laser pulse in the first time slot and a second combined laser pulse in the second time slot. The first and second combined laser pulses are detected by a detector for corresponding first and second electric signals. The laser sources are regrouped into different first and second sets of laser sources through all permutations of the laser sources by keeping the predetermined pulse ratio n / m. Averaged first and second electric signals indicate the response of the device for the predetermined pulse ratio n / m.

This invention discloses a resonant balanced zero-beat photodetector with notch characteristics, its printing apparatus, and a testing apparatus, belonging to the field of photodetectors. By introducing an LC series resonant notch circuit into the resonant balanced zero-beat detector, and adjusting the fine-tuning capacitor in the LC series resonant notch circuit, noise at the repetition frequency of the pulsed light can be suppressed, ensuring optimal notch performance and improving the saturation power and signal-to-noise ratio of the photodetector under pulsed light. It can be applied to testing apparatuses for pulsed compressed light.

[Problem] To provide a mechanism capable of further improving the quality of user experience. [Solution] Provided is an aerosol generation system provided with: a storage unit that has an internal space and an opening through which the internal space is communicated with the outside; at least one detection unit that emits light toward the internal space and detects received reflected light; and a control unit that determines whether or not an article inserted into the storage unit is a base material containing an aerosol source on the basis of the intensities of a plurality of reflected lights detected by the at least one detection unit.

Systems and methods are provided for count-free, equi-depth histograms that may be used in 3D imaging. In one embodiment, a method comprises receiving, at a binner, a stream of photon return events from a pixel of an imaging detector, the stream of photon return events generated by photons transmitted from a pulsed light source and reflected off an object in a scene, classifying, with the binner, each photon return event as either an early event or a late event based on a reference signal controlled by a control value, the control value configured to change based on a relative proportion of early events to late events, and outputting, from the binner, the control value upon request, the control value usable to determine a distance of the object in the scene.

Aspects of the present invention relate to methods and systems for measuring and managing the brightness of digital content in a field of view of a head-worn computer.

An example system includes a first color bandpass filter to receive part of light from a light source and a second color bandpass filter to receive part of the light from the light source. The first color bandpass filter and the second color bandpass filter each has a cutoff wavelength at a band edge. The first color bandpass filter and the second color bandpass filter each has a band edge within a predefined distance of a nominal wavelength of the light source. The first color bandpass filter and the second color bandpass filter is each configured to output filtered light that is based on received parts of the light. One or more processing devices are configured to perform operations that include determining at least first and second values based on the filtered light.

A gauge that is configured to detect a time at which radiation enters the gauge. The gauge may include a member that is configured to transition from a first state to a second state upon receipt of the incoming radiation, and may include a light probe that is configured to detect when the member transitions to the second state. The gauge may provide for determining a time of arrival of the radiation at another gauge. For example, the gauge may correlate the time of arrival at the gauge with the another gauge, thereby providing for correlating a response time of a test specimen with actual exposure time of the test specimen to radiation (e.g., an ion beam).

The application discloses a kind of job object learning and activity visual environment dynamic monitoring feedback system.System includes static monitoring unit, dynamic monitoring unit, data analysis processing unit and feedback unit, static monitoring unit includes object detection module, environment detection module and static monitoring recording module, dynamic monitoring unit includes activity detection recording module, environment change detection module and change monitoring recording module, data analysis processing unit includes learning visual environment monitoring analysis module, dynamic visual environment monitoring analysis module, storage module, processing feedback module and multi-end connection module, feedback unit includes receiving processing module, feedback display module and analysis early warning module.The advantages of the present application are: the present application can let parents more clearly and directly understand the visual environment of the learning activity environment of children, and the feedback display module and the analysis early warning module are combined to comprehensively and more effectively protect the vision of children.

An optical CRA detector unit (14) with an optical CRA sensor (26) arranged on a substrate (22), wherein the optical CRA sensor (26) comprises a number of CRA detector pixels (30) with the same spectral sensitivity, each generating a radiation intensity signal, wherein the radiation intensity signals generated by the CRA detector pixels (30) are provided to generate a parameter characteristic of the principal beam angle (CRA) of the radiation intensity of the CRA detector unit (14), enabling a particularly compact and miniaturized arrangement.According to the invention, this is achieved by providing an aperture element (32) which is arranged above the optical CRA sensor (26) with respect to the substrate (22), wherein the aperture element (32) comprises a flat, laterally extending refractive element (34) which defines a top (36) and a bottom (38), wherein the top and the bottom (36, 38) are provided with an upper aperture layer (40) and a lower aperture layer (42), respectively, and wherein the upper aperture layer (40) is provided with an upper aperture (44) and the lower aperture layer (46) with a lower aperture (46) which has a lateral size of at least the lateral size of the upper aperture (44).

An optical CRA detector unit (14) includes an optical CRA sensor (26) disposed on a substrate (22), where the optical CRA sensor (26) includes a plurality of CRA detector pixels (30) having the same spectral sensitivity, each CRA detector pixel generating an irradiance sensor signal, where the irradiance sensor signal is transmitted to the substrate (22). The irradiance sensor signals generated by the CRA detector pixels (30) are provided with parametric characteristics of the chief ray angle (CRA) for generating the irradiance of the CRA detector unit (14), should allow a specific compact and miniaturized package. According to the invention, this is achieved by providing an aperture element (32) disposed above the optical CRA sensor (26) with respect to the substrate (22), the aperture element (32) comprising a flat, laterally extending refractor element (34) defining a top surface (36) and a bottom surface (38) wherein the top and bottom surfaces (36, 38) are provided with a top aperture layer (40) and a bottom aperture layer (42), respectively, and wherein the top aperture layer (40) is provided with a top aperture (44) and the bottom aperture layer (46) is provided with a bottom aperture (46), the lateral dimension of which is at least the lateral dimension of the top aperture (44).

This invention provides a self-calibrated low-light radiance meter and measurement method based on 355nm pumping, including self-calibration and radiation observation. In self-calibration mode, the multiplexed optical path module periodically imports spontaneous parametric downconversion correlated photons, and the photon counting and coincidence detection modules calibrate the absolute quantum efficiency of the three channels. In radiation observation mode, the multiplexed optical path module imports the low-light target radiation, and simultaneously acquires the absolute spectral radiance of the observed target in the 460nm–1550nm band. The calibration coefficients obtained in the self-calibration mode are used to correct the observation results. This invention starts from the basic principle of calibrating the quantum efficiency of single-photon detectors based on the correlated photon method of spontaneous parametric downconversion, realizing high-precision observation of low-light spectral radiance in the visible to near-infrared bands. It solves the scientific problem of traceability of low-light observation instruments on space platforms and plays an important role in climate monitoring, low-light radiation metrology, and single-photon source radiance measurement.

[Problem] To make an appropriate determination concerning a deposit in a housing unit that is capable of housing a stick-type base material in an inhalation device. [Solution] Provided is an inhalation device which comprises a housing unit which is capable of housing a stick-type base material in an inner space thereof, a first detection unit that emits light into the inner space and detects reflected light received, and a control unit that makes a determination concerning a deposit attached to the housing unit, on the basis of a first detection value corresponding to the amount of received light of reflected light detected by the first detection unit.

The present invention relates to a signage display device provided in an interactive swimming pool, the signage display device comprising: a display having a plurality of signage display modules; a plurality of sensors for sensing a user located in a swimming pool region formed above the signage display modules; and a processor for detecting the user located in the swimming pool region by receiving signals acquired by the plurality of sensors, wherein the processor generates screen information related to the detected user on the basis of the detection result and controls so that the generated screen information is outputted on the signage display modules.

The present invention provides an integrated device for wavelength correlation detection of light, the integrated device comprising: a light collecting element comprising a collecting end and a transmitting end and configured to collect light incident at the collecting end and collect the light at the transmitting end; and a multimode waveguide forming an extension from the receiving end to the distribution end and surrounded by the primary medium along the extension, where the transmission end is coupled to the receiving end, the waveguide configured to receive light from the light condensing element at the receiving end, where the waveguide and the primary medium are configured to propagate light to form a light pattern at the distribution end, the distribution of the light pattern across the distribution end depends on the wavelength of the light; and a plurality of photosensitive elements arranged such that different photosensitive elements receive different portions of the light pattern at the distribution end for wavelength correlation detection of the light.