226results 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.

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).

An optical system for a dry biochemical analyzer. The system consists of a light-source feedback unit, a light-homogenizing illumination light path and a collection light path. The electric current of a light source can be adjusted by means of the light-source feedback unit, such that the intensity of light output by the light source is stable. The system has a simple structure, high adjustment precision and high stability. By means of a multi-channel light-source current driver provided in the light-source feedback unit, rapid switching control over monochromatic light sources with different wavelengths can be realized. By means of the light-homogenizing illumination light path, light-homogenizing processing is performed on incident light beams, such that uniform illumination can be obtained on a dry reagent strip under test, the light path is concise, and a plurality of monochromatic light sources with different wavelengths that are provided off-axis can be overlapped and focused at the same position. The collection light path is configured as a telecentric light path, and a field diaphragm is provided, such that light beams on an entire illuminated surface can be uniformly collected. By using the system, the accuracy of collected reaction light beams corresponding to an object to be tested can be improved, thereby improving the accuracy of a subsequent analysis result of said object.

The invention provides an automobile atmosphere lamp illumination uniformity detection method and system, detection points of a simulated automobile cabin are determined, detection parameters of the detection points are set, and simulated human eye light sensation visual detection in the automobile cabin is realized by setting the detection points; by means of illumination detection data of all detection points on atmosphere light, global illumination distribution of a vehicle cabin is constructed, a non-uniform illumination area in the global illumination distribution is determined, and non-uniform illumination space distribution formed under the current atmosphere light illumination condition is accurately positioned; a target atmosphere lamp suitable for eliminating the non-uniform illumination area is determined in combination with the spatial relationship between the non-uniform illumination area and the atmosphere lamp layout, illumination change information of the target atmosphere lamp is determined, it is ensured that global atmosphere lamp uniformity illumination detection is implemented for the specific cabin environment in the design stage, and by changing the light emitting illumination state of the atmosphere lamp, the uniformity of the atmosphere lamp is improved. The overall lighting quality of the cabin is improved.

The invention refers to a photometric process measurement arrangement (10) with a photometric immersion probe (20). The photometric immersion probe (20) comprises a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising at least two separate wavelength-selective detection elements (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70). The photometer control (80) comprises several impulse signal integrators (819, 829, 839) for integrating the electric impulses generated by the detection elements (71, 72, 73), several A / D-converters (81, 82, 83) for converting the voltages of the impulse signal integrators (819, 829, 839) when high-precision-converting trigger ports (H) of the A / D-converters (81, 82, 83) are triggered, and a measuring cycle control (90) with an integration target memory (94) memorizing an integration target voltage value (Ut). The photometer control (80) is provided with a high-precision-request port (93) for synchronously triggering the high-precision-converting trigger ports (H) of all A / D-converters (81, 82, 83) after the voltage of the first of all impulse signal integrators (819, 829, 839) has exceeded the memorized integration target voltage value (Ut).

The invention relates to a method and a device for determining an albedo of the ground and / or an irradiance of radiation reflected by the ground (14), in a solar installation (12), by means of at least one device (30, 31, 54) for capturing ground-based measurement data, comprising at least one camera (32) which captures an image or a plurality of images of the ground (14) and an evaluation unit (42) which evaluates the ground-based measurement data using satellite image data. The invention also relates to a computer program for determining an irradiance of radiation reflected by the ground, to a data processing device, and to trained machine-learning models for extracting features.

A method and system are provided for rapidly determining equi-depth histogram (ED histogram) boundaries for single photon arrival times without storing complete photon timestamp histories. A plurality of control values (CVs) is initialized for a plurality of binners that classify photon events as early or late relative to the respective CVs. Upon detecting photon arrivals, early and late arrival counts are used to update the CVs using an improved stepping strategy. The disclosed stepping strategy includes scaling a base step size, smoothing with exponential smoothing, temporally decaying the smoothed step size, and further smoothing to produce the step size for updating the CV. The disclosed stepping approach enables the CVs to rapidly converge to the desired quantile locations with low bias and variance compared to previous methods. The optimized stepping strategy is robust to noise and background light, providing accurate distance estimates while reducing bandwidth requirements.

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.

To provide a display light measuring apparatus, a measuring method, and a program capable of suppressing errors caused by residual charges of an integration capacitor in an integration circuit.SOLUTION: A display light measuring apparatus includes: optical sensors 41 to 43; integration circuits 51 to 53 each having an integration capacitor, the integration circuits being configured to accumulate charges output from the optical sensors; light quantity limiting means 90 for limiting a quantity of incident light to the optical sensors; trigger detection means 93 for detecting a trigger signal serving as a trigger for operating the light quantity limiting means 90 to limit the light quantity; reception means 7 for receiving a command to perform a measurement operation; and control means 7 for operating the light quantity limiting means 90 to limit the light quantity on the basis of the detection of the trigger signal and releasing the light quantity limitation by the light quantity limiting means 90 on the basis of the received command for the measurement operation.SELECTED DRAWING: Figure 3

A display device includes a display panel which includes a display area including a plurality of pixels; a touch sensing unit disposed on a front surface of the display panel; a display driving circuit, configured to drive the pixels of the display area based on display control firmware; and a touch driving circuit configured to drive touch electrodes of the touch sensing unit based on touch driving firmware, and further configured to generate touch coordinate data, wherein the display control firmware and the touch driving firmware are initialized or changed according to a comparison result between a flicker noise detection value of the display area and a reference flicker noise detection value, wherein the flicker noise detection value is determined by measuring a change in luminance over time of a flicker detection pattern displayed in the display area.

A method and apparatus for estimating capacity of a system including an energy generation system, an energy storage system or both. The method and apparatus initially estimate the system capacity based on a facility location and size. The initial estimate may be adjusted through adjustment of at least one parameter. An updated capacity estimate is generated and displayed.

To provide a technique capable of estimating a camera position without having high processing performance.SOLUTION: An optical wireless communication system includes a plurality of light sources, a receiving device including an event camera, and an information processing device. Each of the plurality of light sources transmits an optical wireless communication signal. The receiving device receives the optical wireless communication signal via the event camera. The optical wireless communication signal includes position-related information for identifying a position in an absolute coordinate system of a transmission source of the optical wireless communication signal. The information processing device identifies a signal region of the optical wireless communication signal in an image plane coordinate system of an image plane obtained by the event camera to acquire a light source image position indicating a position at which each of the plurality of light sources is projected in the image plane coordinate system, acquires a light source absolute position indicating a position at which each of the plurality of light sources is located in the absolute coordinate system on the basis of the position-related information included in the optical wireless communication signal, and uses the light source image position and the light source absolute position to estimate a position and a direction of the event camera in the absolute coordinate system.SELECTED DRAWING: Figure 1

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.

The invention provides a light source calibration method and system for a light sensing chip test and electronic equipment, and relates to the field of light sensing chip calibration. According to the method, light intensity of a light cylinder can be accurately calibrated by utilizing a light cylinder calibration strategy and combining a light sensing chip calibration strategy; therefore, the sensor of the light sensing chip sorting device is fully utilized to process the calibration process, the calibration precision is improved, the calibration process can be automatically guided, the manpower consumption during calibration in light cylinder parameter acquisition is reduced, the calibration execution efficiency is improved, and the test yield of the light sensing chip is improved.

The invention relates to a method for monitoring a taillight (5) of a vehicle (1) by means of a rearwardly directed camera (8), wherein the taillight (5) has a lighting unit (7a, 7b, 7c). The taillight (5) and / or a lamp environment (U5) illuminated by the taillight (5) is / are detected by the at least one camera (8) and camera signals (S8) are output. A camera image containing pixels is provided depending on the output camera signals (S8), wherein the taillight (5) of the vehicle (1) or the lamp environment (U5) is represented in taillight / lamp-related pixels of the respective camera image. Brightness values at least for the taillight / lamp-related pixels of the respective camera image are determined and evaluated. A functional status of the taillight (5) is determined and output depending on the determined brightness values.

The utility model discloses a display module detection jig with a photosensitive element, which is characterized in that a power switch is designed into a hinge shape, an LED light source for testing the photosensitive element is fixed on an upper hinge, the LED light source is provided with a black silica gel protective sleeve, the protective sleeve is made of soft materials, and when the switch is closed, the semi-permeable ink silk-screen area of a glass cover plate can be completely covered. Interference of external environment light on the quantity of light penetrating through the semi-through hole is isolated, whether light sensing of the photosensitive element is normal or not is detected, photosensitive sensing defective products are screened out, and the product quality is guaranteed.

To provide an optical control device that can change an irradiation direction of light with which an object is irradiated without changing the position of an optical system.SOLUTION: An optical control device comprises: a light source; a light condensing unit; and an optical route control unit. The light source emits light. The light condensing unit condenses the light the light source emits to irradiate an object with the condensed light. The optical route control unit is arranged between the light source and the light condensing unit, and changes an irradiation direction of the light relative to the object by changing the position of a portion where the light passes in a plane vertical to an optical axis of the light.SELECTED DRAWING: Figure 1

The present invention provides a photon counter sensitivity and stability test system and test method, which include a shielded dark box, a self-calibration standard light source, a test bench, a photon counter, an electronic system and a computer system. The self-calibration standard light source and the photon counter are placed in a test bench inside the shielded dark box. The test bench is provided with multiple test stations, and multiple groups of photon counters can be tested simultaneously each time. The computer system receives the photon counting measurement value and automatically analyzes the value of the specified time period, and automatically uploads the analysis result to the cloud server. If the result index exceeds the given technical index, an automatic alarm is issued. The electronic system is used to count the photons of the standard photon counter equipped with the self-calibration standard light source, and drive the light source to perform self-calibration according to the deviation between the count value and the standard count value, thereby eliminating the standard output light wave deviation caused by the position change of the light source due to power fluctuation or external factors, and improving the accuracy of the sensitivity test of the photon counter.

A machine for roadwork can include a frame, a power source, and a milling rotor that can be operatively connected to the power source and the frame. The machine for roadwork can also include at least one camera and an image processor. The at least one camera can be configured to capture one or more images of the milling rotor. The image processor can be in communication with the at least one camera. The image processor may be configured to analyze the one or more images of the milling rotor captured by the at least one camera. The image processor may also be configured to determine a scratch height of the milling rotor based on one or more images. The scratch height can define a height of the milling rotor on condition that the milling rotor is in contact with a surface of the roadway.

Methods and devices for the sequential measurement of a plurality of semiconductor-based light sources that operate faster, more accurately and more sensitively than known methods and devices. In accordance with one implementation, a current pulse is applied by a pulsed current source to the low-luminosity light sources consecutively or simultaneously. The emitted light pulse of LED is converted into electric charge carriers by a photodiode, the electric charge carries are added up by means an integrator circuit, the added-together charge carriers are converted by an A / D converter into a digital signal and the digital signal is forwarded to a measurement and control unit.

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 discloses a lamplight verification method and equipment. The method at least comprises the following steps: determining a model and a first deployment mode of a to-be-tested lamp; determining a target illumination curve of the to-be-detected lamp based on the model and the first deployment mode; the target illumination curve is used for representing illumination values of the lamp to be detected at different positions; and verifying whether the illuminance of the to-be-detected lamp meets a demand condition based on the target illuminance curve. According to the scheme, the checking efficiency of the light illumination is improved, and the checking cost is reduced.

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 light brightness detection method, an electronic device, a processor and a computer program product. The method includes: a first detection step of detecting an output electrical signal of a first optical sensor within a first exposure duration; a second detection step of detecting an output electrical signal of a second optical sensor within a second exposure duration; and a determination step of stopping detection when an output electrical signal obtained in any one of the detection steps is within a predetermined electrical signal range. The method solves the problem of low detection accuracy of an ambient light sensor in the related art.

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.

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.