2072results about "Photometry" patented technology

The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic effective solar irradiance measurement method, which comprises the following steps of: converting optical power into irradiance and tracing the irradiance to an SI unit system by taking trap detection transmitted by a low-temperature radiation meter as an optical power standard device and combining a precise diaphragm; respectively collecting the output voltage of the total radiometer, the output voltage of the monitoring radiometer, the zenith angle of the total radiometer in the non-shielding state and the solar irradiance output by the absolute radiometer when the total radiometer is in the shielding state and the non-shielding state, and calibrating the total radiometer; angle response, temperature response, sensitivity linear response and spectral response data of the total radiometer and the photovoltaic module under different influence parameters are obtained, a correction coefficient set is obtained through fitting and used for conducting temperature, angle, irradiance linearity and spectral mismatch correction on the irradiance measured by the total radiometer, photovoltaic effective solar irradiance data are obtained, and the photovoltaic effective solar irradiance data are obtained. Accurate measurement of the solar irradiance for photovoltaic power generation is realized.

The invention relates to the technical field of laser heat treatment, and provides a calibration method of a full-automatic circuit board cutting machine. The method comprises the following steps: acquiring physical coordinates of a circuit board of a cutting device through an intelligent sensor, and constructing a reference coordinate system matrix based on the physical coordinates; determining vibration parameters of the cutting device according to coordinates of laser spots emitted by a laser and the reference coordinate system matrix, and generating a nonlinear error component according to the vibration parameters and power information of the laser; generating an error function based on an error matrix formed by the error components, and determining a calibration coefficient vector by solving the error function; closed-loop control is conducted on the laser path of the cutting device through the calibration coefficient vector, the adaptability of the cutting device to complex working conditions is improved by integrating multi-source error factors and establishing a nonlinear mapping relation, and the cutting precision and stability are ensured.

In certain embodiments, ophthalmic laser system includes an auxiliary light system, laser system, imaging system, and computer. The auxiliary light system directs auxiliary light towards a test target according to a planned test pattern to yield one or more actual auxiliary spots of an actual test pattern on the test target. The planned test pattern indicates one or more planned auxiliary spots located relative to a planned laser spot in a predetermined manner. The laser system directs a laser beam to yield an actual laser spot of the actual test pattern on the test target. The imaging system generates a digital image of the actual test pattern. The computer analyzes the digital image to compare the actual to the planned test pattern, detect a deviation of the actual from the planned test pattern, identify an issue indicated by the deviation, and provide output in response to the issue.

The invention relates to the technical field of image generation, in particular to an intelligent vision trend chart generation method and system based on multi-modal data fusion, and the method comprises the steps: collecting the multi-modal vision data of a user through an intelligent terminal device; performing space-time alignment processing on the multi-modal vision data to generate a standardized data set with a unified timestamp; inputting the standardized data set into a multi-modal feature fusion module, and generating a comprehensive feature vector including time-space correlation information; carrying out dynamic modeling on the vision change trend by adopting a residual error connection bidirectional LSTM network, and outputting a prediction track comprising a confidence interval; the predicted trajectory and historical data are superposed, an interactive stereoscopic vision trend chart is generated through an adaptive smoothing algorithm, and the stereoscopic vision trend chart comprises a pathological factor association layer and a behavior intervention suggestion layer. The method has higher precision and applicability in the aspects of data fusion, trend prediction, visual interaction and the like, and provides technical support for precise and personalized vision health management.

The invention relates to the technical field of lamps, in particular to a light sensor, a lamp and a using method. A light sensor includes: a condenser lens; a light sensor; the shell is provided with a containing space, a through hole is formed in the shell, the condensing lens and the light sensor are fixedly arranged in the containing space of the shell, part of the condensing lens is arranged in the through hole, the condensing lens and the light sensor are correspondingly arranged, the condensing lens is used for collecting light outside the shell, and the light sensor is used for sensing the light outside the shell. And the light sensor is used for sensing the change of the light rays collected by the condensing lens. The invention provides a light sensor, a lamp and a use method, and aims to solve the problems that a lighting element and a sensing element are fixed through two parts in the design process of an existing sensor, and in later assembly and use, due to the fact that the lighting element and the sensing element have installation errors, positioning of the lighting element and the sensing element is not accurate, and the cost is low. The use effect of the sensor is affected, and the experience is poor.

The invention discloses a marine radiance meter immersion factor measurement method, which belongs to the technical field of radiation value measurement, and comprises the following steps: controlling a stable halogen tungsten lamp to irradiate towards a calibration container below the calibration container, the bottom of the calibration container is a diffuse transmission plate to generate a uniform light field, and the calibration container is filled with ultrapure water; the method comprises the following steps: firstly, measuring the radiance value of the optical window of the radiance meter just immersed under the water surface, then discharging ultrapure water in a calibration container in sequence, and obtaining the radiance value when the distance between the optical window of the radiance meter and the water surface is zi; performing water attenuation correction on a measured value in the air of the radiance meter, and extrapolating to calculate radiance when zi is equal to 0; the refractive index of the water body is calculated, and the immersion factor of the to-be-measured radiometer is calculated. According to the marine radiance meter immersion factor measuring device, the problem that in theoretical calculation, only the radiance meter optical window refractive index is considered, and different radiance meter light path design influences are ignored, so that the deviation between a theoretical calculation result and an actual value is large is solved.

The invention belongs to the technical field of laser measurement equipment, and provides a laser experiment device for measuring laser power reduction in a submerged environment, which comprises an experiment platform, a laser generation system and an experiment system, the experiment system comprises a submerging container and a laser power reduction measuring assembly. A liquid medium is stored in the submerged container, and the sample is submerged in the liquid medium; the laser power reduction measuring assembly is located below the submerging container. Laser emitted by the laser head irradiates a sample in the submerged container, and the laser power reduction measuring assembly is used for measuring the power reduction of the laser penetrating through the liquid medium; as a device for measuring laser reduction, the laser reduction degree of laser power and energy under different liquid media can be explored, the reduction influence of different liquid media on the laser power can be explored, the optimal laser power corresponding to the liquid media can be found, the laser-assisted rock breaking strategy in the drilling process can be correspondingly adjusted, and the drilling efficiency is improved. And effective data can be provided for laser-assisted rock breaking in a liquid environment.

Provided are an optical element capable of more easily detecting a change in refractive index of an object to be measured without sweeping a wavelength of incidence light, and an optical sensor using the optical element. An optical element includes a liquid crystal layer that is formed of a composition including a liquid crystal compound, in which the liquid crystal layer has a liquid crystal alignment pattern in which an orientation of an optical axis derived from the liquid crystal compound changes while continuously rotating toward at least one direction of in-plane directions, in a case where a length over which the orientation of the optical axis derived from the liquid crystal compound rotates by 180° in a plane is set as a single period, a length of the single period in the liquid crystal alignment pattern gradually changes in the one direction, and the liquid crystal layer has a resonance structure.

The invention discloses a high-light element damage monitoring method and system, a storage medium and a computer program product, and relates to the technical field of high-energy laser, and the method comprises the steps: starting a laser device to irradiate a to-be-monitored high-light element, the element temperature, the light spot power and the light spot image of the highlight element to be monitored in the irradiation process are acquired through a data acquisition module; generating a light spot analysis diagram, a temperature space distribution diagram and a temperature power time distribution diagram according to the element temperature, the light spot power and the light spot image; and performing damage monitoring on the highlight element to be monitored based on the light spot analysis diagram, the temperature space distribution diagram and the temperature power time distribution diagram. According to the invention, the state of the strong light element under laser irradiation is comprehensively reflected from different angles by simultaneously collecting multiple parameters, and misjudgment or missed judgment possibly caused by single parameter monitoring is avoided, so that the comprehensiveness and accuracy of monitoring are improved.

The invention relates to the technical field of light detection, in particular to a light detection sensor and a light projection device and an optical module thereof, the light projection device comprises an illumination optical system, a light modulation element and a projection optical system, and the illumination optical system is configured to emit light advancing along a first preset light path; the light modulation element is configured to receive light emitted by the illumination optical system and modulate the light to generate modulated light, and the modulated light travels along a second preset light path; the projection optical system is configured to receive the modulated light and guide the modulated light to advance along a second preset light path; the projection optical system comprises a plurality of lenses, and optical axes of partial lenses in the plurality of lenses are offset by a preset offset amount relative to a main optical axis of the projection optical system. According to the invention, under the condition that a relatively small Samm angle is adopted, the misalignment amount is preset for a part of lenses in the plurality of lenses, so that the miniaturization requirement of the sensor can be met, and the light energy transmission efficiency can be improved.

The invention belongs to the technical field of photoelectric countermeasure, and particularly relates to a CMOS detector damage system based on time-domain composite pulse laser, which comprises a time-domain composite pulse laser generation module, a light beam transmission and focusing module, a target damage monitoring module, a parameter optimization control module and a detector to be damaged. The time domain composite pulse laser generating module comprises a short pulse laser, a long pulse laser, a pulse synchronous controller, a power adjusting unit, a power supply module and a cooling device, and the power adjusting unit is electrically connected with the short pulse laser and the long pulse laser; and the power supply module is electrically connected with the long pulse laser, the short pulse laser and the cooling device. According to the method, energy loss generated by plasmas in a traditional laser damage method is avoided, the damage efficiency is remarkably improved, efficient transmission and concentration of energy in the multilayer structure are achieved through the synergistic effect of long pulses and short pulses, all layers of materials synchronously lose efficacy in a short time, and the damage consistency of the whole multilayer structure is ensured.

In certain embodiments, an ophthalmic laser system includes a laser system, imaging system, and computer. The laser system accesses a planned test pattern of planned laser spots and directs a laser beam towards a test target located at a target plane according to the planned test pattern to yield an actual test pattern of actual laser spots on the test target. The actual laser spots correspond to the planned laser spots. The imaging system has a digital camera that generates a digital image of the actual test pattern. The computer analyzes the digital image to: compare the actual test pattern to the planned test pattern; detect a deviation of the actual from the planned test pattern; identify an issue indicated by the deviation; and provide output in response to the identified issue.

The invention provides a color calibration processing method and electronic equipment. The method comprises the following steps: acquiring primary color information of light-emitting equipment; determining the theoretical brightness of each channel corresponding to the target color; determining the current duty ratio of each channel under the current junction temperature according to the current junction temperature, the reference junction temperature brightness of each channel and the theoretical brightness of each channel corresponding to the target color, and obtaining a color mixing output result; determining new reference junction temperature brightness of each channel and junction temperature offset of each channel; obtaining a new maximum brightness and a new current duty ratio of each channel under the current junction temperature, and lightening the light-emitting device again based on each new current duty ratio to obtain a new color mixing output result; and if the new color mixing output result meets the preset error range, taking the junction temperature offset of each channel as the calibration junction temperature offset of each channel of the light-emitting equipment, and taking the new reference junction temperature brightness of each channel as the calibration reference junction temperature brightness of each channel. And the color mixing precision of the light-emitting equipment in the whole working temperature range is improved.

A system and method are provided for determining a location of a laser using a diffraction grating. The system includes a lens that projects diffraction patterns from the diffraction grating as an image of diffraction peaks onto a plane. Optical sensors then sense the diffraction peaks. A processor connected to the optical sensors applies a laser position determination method to determine the laser location. In the method, the processor obtains the diffraction peak measurements from the optical sensors and applies a transform to arrange the diffraction peaks into a grid of regularly spaced peaks. The processor then applies convolution kernels to analyze the grid of regularized peaks to to determine a position of a zeroth order diffraction central peak that is used to calculate the angle of incidence of the axis of the laser beam to determine the laser position.

A squeezed light generator may include a triply-coupled optical resonator having a triplet resonance with a split-resonant frequency spacing Ω, where the triplet resonance receives light at frequencies associated with at least one split-resonant frequency in the triplet resonance and generates squeezed light with at least another split-resonant frequency in the triplet resonance.

Techniques for determining dynamically the intensity of the reflection from a transmissive cover and neutralizing it so as to improve the accuracy of depth measurements. Depth measurements of light modulation at multiple frequencies—which also can be used for depth disambiguation—are obtained and used to decouple the information to estimate the intensity of the signal reflected by the transmissive cover itself or a smudge on the transmissive cover, and the intensity of the signal reflected by the target object.

The present invention provides a method for correcting measurement data of an optical measuring device, comprising: obtaining measured light intensity data of a plurality of samples in a target wavelength band measured before and after an optical device in the optical measuring device is replaced; calculating a light intensity ratio curve, a weighted ratio curve, and a corrected ratio curve for each sample in the target wavelength band at each frame based on the measured light intensity data of the plurality of samples in the target wavelength band; and correcting the measured light intensity data after the optical device is replaced based on the corrected ratio curve to obtain corrected measured light intensity data. The present invention obtains a corrected ratio curve at each frame based on the measured light intensity data of the plurality of samples before and after the device is replaced, and corrects the light intensity data after the device is replaced using the corrected ratio curve, so that the film thickness and complex refractive index extracted from the corrected data are consistent with the film thickness and complex refractive index results before the device is replaced, thereby reducing unknown and difficult-to-characterize errors introduced by the device replacement.

A method of predicting a lifespan of a display device includes preparing a test panel including a test light emitting element including a first and second test light emitting layers, measuring a luminance of the first and second color of the test panel to acquire first and second deterioration data of the first and second color, calculating a lifespan of a pixel based on the first and second deterioration data, and a first and second color component ratio of first emission light for a thickness of a wavelength conversion layer. The pixel includes a light emitting element emitting the first emission light and mixed light of the first and second color, and the wavelength conversion layer, and a light emitting layer of the light emitting element includes a first light emitting layer emitting light of the first color, and a second light emitting layer emitting light of the second color.

The invention relates to the technical field of light quantum metering, in particular to a multifunctional standard single photon source generation and calibration device and a use method, and the device comprises a pumping laser light source, a nonlinear crystal, a signal optical filter, a beam splitter, a temperature control module, an idler frequency optical filter, a control module, a single photon detector group, a beam splitter, a multi-channel coincidence counter, and an optical switch. The pumping laser light source pumps the nonlinear crystal to generate two paths of single photon output of signal light and idler frequency light, the two paths of single photon output are filtered by the filter and then divided into multiple paths by the beam splitter, and standard single photons are directly output or the paths of the signal light or the idler frequency light are controlled by the optical switch to enter the single photon detector group for detection. External input single photons are controlled by the optical switch to enter the single-photon detector group for detection, and a count value of the single-photon detector group is accessed to the multichannel coincidence counter to record data. A pump light stable power system and a multi-path beam splitting coincidence counting system are introduced into a light path, so that standard single photon output with known brightness and g (2) (0) value can be realized.

A method for evaluating degradation of a photodetector (112), the photodetector (112) comprising at least one photosensitive element (116), the photodetector (112) being configured for generating at least one detector current depending on an illumination of the photosensitive element (116) by light, the photodetector (112) further comprising at least one evaluation unit (120) for evaluating the detector current, wherein method comprises: a) determining at least one detector current; b) evaluating the detector current with respect to at least one reference value to obtain at least one relative detector current value; and c) deriving at least one item of degradation information on the photosensitive element (116) using the relative detector current value, the item of degradation information describing the degradation of performance due to temperature hysteresis behavior, aging, excessive temperatures and / or excessive illumination.

A multi-line laser radar (1). The multi-line laser radar (1) comprises: a multi-line ranging laser emission module (110) comprising one or more lasers (112); a multi-line ranging laser reception module (120) comprising one or more photodetectors and designed to be adapted to detect a laser echo generated when a measurement laser emitted by the laser emission module (110) is incident to an obstacle (Z) and is diffusedly reflected; a ranging information resolution module in electrical signal connection with the multi-line ranging laser emission module (110) and the multi-line ranging laser reception module (120), and designed to calculate the distance, in each direction, to the obstacle (Z) by means of calculating the time difference between the emission of the measurement laser and the receiving of the laser echo; and a control circuit and an optical system correspondingly configured for the multi-line ranging laser emission module (110) and the multi-line ranging laser reception module (120).

In one embodiment, a vehicle fire protection system and method therefor determines the combustion oxygen demand for the interior and / or the various enclosed parts of the vehicle, detects a current amount of oxygen in the interior and / or the enclosed parts, and if the current amount of oxygen is greater than the combustion oxygen demand, supplies a gas for venting the oxygen from the interior of the vehicle and / or the enclosed parts to the exterior of the vehicle, wherein the vehicle fire protection system and method are capable of preventing a vehicle fire by adjusting the amount of oxygen in an interior of a vehicle and / or various enclosed parts of the vehicle to be less than the combustion oxygen demand that can cause a combustion reaction.

Methods and apparatus are presented for measuring a photoluminescence (PL) response, preferably a spatially resolved image of a PL response, from an object exposed to solar irradiation. In certain embodiments signals from the object are measured in two or more different spectral bands selected such that one of the measured signals has a higher PL component relative to ambient reflectance compared to another measured signal, enabling the PL component to be enhanced by a suitable differencing procedure. In other embodiments a signal from an object is measured in a spectral band selected such that at least 20% of the measured signal comprises PL generated from the object by the solar irradiation. The methods and apparatus have particular application to outdoor inspection of photovoltaic modules without having to modulate the operating point of the modules.

The invention provides an optical system and a monitoring method for monitoring a stimulated Brillouin scattering effect, and the optical system for monitoring the stimulated Brillouin scattering effect comprises the steps: firstly, conveying a narrow-linewidth seed source into a laser amplifier through a first optical device, and carrying out the narrow-linewidth laser amplification; and the stimulated Brillouin scattering light generated by the laser amplifier is guided out to the return light monitoring module, so that the return light power and the spectral component of the stimulated Brillouin scattering light are detected in real time through the return light monitoring module, and the purposes of simultaneously and accurately measuring the power of the stimulated Brillouin scattering light and observing the laser component are achieved. Whether the stimulated Brillouin scattering effect occurs or not can be judged more easily; furthermore, according to the optical system, the narrow-linewidth seed source and a spectrograph in the return light monitoring module can be protected from being damaged by return light to the maximum extent by adjusting the light splitting proportion of the first optical device and the return light monitoring module, and the purposes of accurately judging the stimulated Brillouin scattering effect and protecting system safety are achieved.

The invention relates to the technical field of illuminometer calibration, and discloses a calibration device and a calibration method of an illuminometer for measuring medium and low illuminance. The calibration device comprises an integrating sphere assembly, a light source control module, a reflecting plate adjusting module, a spectrum monitoring module and a calibration execution module. A plurality of fixing holes are formed in the integrating sphere assembly, the light source control module achieves stable light intensity output through a dynamic current distribution algorithm and PID closed-loop control, the reflecting plate adjusting module compensates edge light attenuation through a self-adaptive positioning algorithm, and the spectrum monitoring module evaluates spectrum stability through a spectrum matching algorithm. And the calibration execution module adopts a nonlinear error correction algorithm to improve the calibration precision. The calibration method comprises the steps of initializing the device, adjusting the height of the reflecting plate, collecting data to generate a calibration curve, correcting errors, testing at multiple angles and the like. According to the invention, the defects of the traditional calibration technology can be effectively overcome, and the calibration precision and reliability of the medium and low illumination illuminometer are improved.

The invention discloses a flame simulator applied to a flame detector, the flame simulator comprises a shell, a reflective cup, a light source board, a light-transmitting board, a first temperature detection device, a power supply device and a controller; the reflective cup is located inside the shell; the reflective cup comprises a cup body, and a cup bottom and a cup mouth located on opposite sides of the cup body; a light-through hole is provided on the cup bottom; a light-emitting surface of the light source board is located in the light-through hole and faces the cup mouth side; the light-transmitting board is located on the side of the cup mouth away from the cup bottom; the first temperature detection device is located on the side surface of the light source board away from the reflective cup; the first temperature detector is used to obtain a first temperature of the light source board; the power supply device is located on the side of the light source board away from the reflective cup; the controller is located on the side of the light source board away from the reflective cup; the controller is electrically connected to the power supply device, the first temperature detection device and the light source board respectively, and the controller is used to control the light-emitting frequency of the light beam emitted by the light source board according to the first temperature, so as to improve the light beam intensity stability of the simulated flame provided by the flame simulator.

The invention discloses a space target luminosity dynamic measurement ground experiment system, and the system comprises a multi-degree-of-freedom controllable rotary table which is connected with a satellite scaling model and is used for driving the satellite scaling model to rotate and adjust at multiple angles; the visible light detection unit is positioned in the reflection light path direction of the satellite scaling model and is used for imaging the satellite scaling model and generating a continuous observation image sequence; the light source unit is used for simulating a parallel light source of the sun, and the light source directly irradiates the satellite scaling model; and a master control unit. And the master control unit is used for controlling the intensity of the light source, the motion parameters of the rotary table and image acquisition, and carrying out downsampling processing on image data to generate a luminosity sequence for simulating long-distance observation. The technical scheme provided by the invention can provide reliable technical support for space target identification, orbit prediction and stealth technical verification, and has innovativeness, practicability and economical efficiency.

An optical module includes a base material, an optical semiconductor element, an optical circuit element, a first adhesive, and a second adhesive. The base material has a first surface. The optical semiconductor element has a first optical port and is provided on the first surface. The optical circuit element has a second optical port, which faces the first optical port and is optically coupled to the first optical port, in a side surface thereof. The optical circuit element is disposed alongside the optical semiconductor element on the first surface. The first adhesive mainly includes a UV curable material. The first adhesive fixes the optical semiconductor element to the first surface and has a first thermal conductivity. The second adhesive mainly includes a thermosetting material and has a second thermal conductivity higher than the first thermal conductivity. The second adhesive fixes the optical semiconductor element to the first surface.

The invention discloses an industrial lighting method based on an HPLC broadband power line carrier, and the method comprises the following steps: S1, obtaining all scene information of a factory production line, the scene information comprising lighting demands corresponding to different processes and different time periods of the production line; s2, formulating an illumination strategy according to a corresponding illumination demand, and storing the illumination strategy in the control platform; s3, acquiring data information in the scene through an acquisition module, transmitting the data information to a control platform through an HPLC (High Performance Liquid Chromatography) broadband power line carrier communication module, analyzing the data information through the control platform, calling a proper lighting strategy, sending a corresponding instruction through the PLC broadband power line carrier communication module, and lighting the current scene; in conclusion, the defects in the prior art are overcome, remote control, debugging and maintenance of the lighting equipment can be achieved through the HPLC broadband power line carrier technology, the flexibility and response speed of the lighting system are greatly improved, and the high social use value and application prospects are achieved.

An electronic device includes a light sensing system and an at least partially translucent housing member positioned over at least the light sensing system. The housing member has an interior surface and an at least partially translucent exterior surface, wherein the interior surface includes multiple facets configured to direct light impinging on a translucent portion of the exterior surface toward the light sensing system. The facets are configured to create a prismatic effect, such as the effect produced by a Fresnel lens, that directs light toward the light sensing system. The light sensing system optionally includes a light sensor and / or a light guide. Where the electronic device is a lighting control device, the electronic device further includes a processor coupled to the light sensing system and operable to generate lighting control signals responsive to receipt of light sensing signals from the light sensing system.