36 results about "Integrating sphere" patented technology

The embodiment of the application provides a kind of based on integrating sphere light source's photosensitive diode multispectral calibration device and method, for by dark current measurement, photocurrent correction and wavelength response fitting, photosensitive diode array is carried out wide band multispectral calibration.The device of the application includes integrating sphere device, multi-band adjustable light source module, the photosensitive diode array to be calibrated and control and analysis unit;The inner wall of integrating sphere device is high reflectivity diffuse reflection material;Integrating sphere device further includes trap detector, and trap detector is used for real-time monitoring the reflection loss of the inner wall of integrating sphere device;Trap detector is connected with control and analysis unit communication;Multi-band adjustable light source module is accessed integrating sphere device;The photosensitive diode array to be calibrated is composed of multiple photosensitive diodes;Control and analysis unit and multi-band adjustable light source module, the photosensitive diode array to be calibrated establish communication connection.

This invention relates to the field of aerosol monitoring technology, specifically to an aerosol classification and identification system based on graded filtration and multi-optical parameter detection. The system includes an automatic membrane-changing graded filtration device, a sampling gas path switching device, an optical detection module, and a data processing and control device. The automatic membrane-changing graded filtration device loads multiple nucleopore membranes of different pore sizes and automatically switches them sequentially to achieve stepwise particle size separation of aerosol samples. The optical detection module integrates a cavity ring-down spectroscopy unit and an integrating sphere scattering measurement unit sharing a single laser light source, simultaneously measuring the extinction coefficient and scattering coefficient of the same graded sample. The data processing and control device constructs a matching feature vector based on the current filter membrane pore size and the calculated absorption coefficient, single-scattering albedo, and other optical parameters, compares it with an optical fingerprint database, and outputs the particle type identification result. This invention solves the technical problem of effectively distinguishing mixed aerosol components through dual-dimensional synergistic analysis of particle size and optical parameters, achieving accurate identification of aerosol particle types.

This invention relates to a temperature control method and device for a laser detection system based on pulse waveform feature feedback. The laser detection system includes a laser, an integrating sphere, and a laser detector arranged sequentially. The laser detector is equipped with a cooling system for cooling the laser detector. The laser, integrating sphere, laser detector, and cooling system are each connected to a control terminal. The method is applied to the control terminal and includes: acquiring the pulse waveform characteristics and a first real-time temperature of the laser detector; determining whether the cooling system meets the temperature adjustment conditions based on the pulse waveform characteristics; querying the target adjustment temperature corresponding to the current signal deviation from a database based on the current signal deviation; determining a comprehensive error based on the target adjustment temperature, the first real-time temperature, and the target temperature of the laser detector; inputting the comprehensive error into a PID algorithm to obtain control commands for the cooling system. Timely and accurate temperature control of the laser detection system is achieved based on pulse waveform feature feedback.

The utility model discloses a lamp light radiation safety testing arrangement, including the support frame of integral sphere and bottom. Integral sphere contains fixed hemisphere and mobile hemisphere, and support frame is connected with moving track, and mobile hemisphere is moved along track through moving wheel and realizes opening and closing. The support frame bottom is equipped with the rotary frame, can drive integral sphere along the longitudinal axis rotation, and there is fixed clamp between rotary frame and support frame. The device is through integral sphere rotation, solves the problem that the probe adjustment needs to move because of the large integral sphere is blocked, and combines the design that opens and closes the hemisphere, and improves the operation convenience and test stability.

This application relates to the field of microscopic imaging radiation calibration technology, providing a photon flux standard source and a method for measuring photon flux responsivity. The photon flux standard source includes an integrating sphere light source and an aperture; the outer side of the integrating sphere light source outlet includes a first flat surface with a first area, and the side of the aperture near the integrating sphere light source has a second flat surface with a second area. The first flat surface and the second flat surface are parallel and have a planar gap. The integrating sphere light source outlet has an average brightness within a solid angle defined by the aperture; wherein the planar gap, the average brightness, the first area, and the second area are used to calculate the photon flux to determine the photon flux responsivity of the detector under test. This application can accurately determine the photon flux entering the microscopic imaging system, thus improving the accuracy of the photon flux responsivity of the microscopic imaging system calibrated based on the photon flux.

This utility model discloses a detection device for a low-light image intensifier, comprising a light source, an integrating sphere assembly, a dark box, and a detection component arranged sequentially. The dark box contains a clamp for mounting the low-light image intensifier, and an optical channel is provided between the light source, the integrating sphere assembly, and the dark box. The dark box includes a top plate with a mounting through-hole corresponding to the fluorescent screen of the low-light image intensifier. The detection component includes an eyepiece and a detection camera. The eyepiece is detachably connected to the mounting through-hole via a first adapter. The detection camera is located above the top plate, and a light-shielding tube is connected to its lower part. The lower end of the light-shielding tube is detachably connected to the mounting through-hole via a second adapter. This utility model integrates camera detection and visual detection into a single setup by connecting the eyepiece and the light-shielding tube of the detection camera to the same mounting through-hole via the first and second adapters, respectively, effectively improving the detection efficiency of the imaging uniformity of the low-light image intensifier.

The application discloses a kind of based on bimodal resonance's photoacoustic-scattering aerosol dual-wavelength synchronous detection system and method, belong to photoelectric detection technical field, in the system, dual-wavelength light source modulation module generates two different frequency modulated laser, respectively from two ends into double-difference bulb pipe coupling photoacoustic-scattering combined gas cell;The gas cell includes the two ends of two acoustical tubes arranged in parallel and each is connected with an integrating sphere, form H type coupling structure;Scattering signal collection module, photoacoustic signal acquisition and processing module respectively acquire two-channel scattering photon counting data in two integrating spheres, sound wave signal in two acoustical tubes and two integrating spheres;Digital lock-in signal processing module based on FPGA outputs modulation signal to light source, and receives sound wave signal in two acoustical tubes and two integrating spheres to carry out full-digital demodulation and processing.The application effectively solves the problem of time-space asynchronization and sampling cumulative error caused by time-sharing multiplexing or multiple machine parallel connection.

The application provides a kind of sub-aperture mosaic spectral calibration detection device and its detection method, wherein the detection device includes: broadband light source, wavelength division multiplexing device, coupler, integrating sphere and spectrometer;Detection device is used to detect large aperture telescope system, and telescope system includes primary mirror and secondary mirror;Broadband light source is used to emit broadband light beam to wavelength division multiplexing device, and wavelength division multiplexing device is used to select the frequency band of broadband light beam, and the incident light beam is transmitted to the pupil of telescope system through coupler, and is incident to focal plane after being reflected twice in primary mirror and secondary mirror of telescope system, and integrating sphere is arranged at the focal plane of telescope system, and the outgoing light beam is transmitted to spectrometer by multimode optical fiber to obtain the actual measured spectral data T (i). The application selects spectrum by wavelength division multiplexing device, and the response generated by different spectrum, finally realizes the splicing detection of system through the cooperation of three domains of space domain, time domain and frequency domain.

The application provides a fabric color difference grade determination method based on multi-dimensional spectral analysis, and belongs to the technical field of intelligent textile detection. The method comprises the following steps: acquiring a three-dimensional spectral data cube of a sock band under an integrating sphere diffuse light source environment by using a spectral imaging acquisition system, and converting an original image into spectral reflectance data through black and white board radiation correction; identifying a joint position by using the spectral response difference between the joint and the sock band, completing automatic segmentation of the sock band image, and acquiring effective detection areas of each segment; in combination with OCR-recognized character information, eliminating surface defects by using a deep learning target detection algorithm for a single sock band; separating texture shadows and background noise by using hyperspectral unmixing, and extracting pure spectra representing the true color of the sock band; and mapping the pure spectra to a CIELAB color space to calculate color differences and determine grades. The application realizes the intelligentization and objective evaluation of the sock band determination method by using spectral imaging and intelligent recognition technology.

The utility model discloses a kind of adjustable illumination high-uniformity integrating sphere light source device, including optical platform, optical platform surface is equipped with the fixed connection of integrating sphere leveling base, integrating sphere leveling base is equipped with integrating sphere body, integrating sphere body surface is equipped with integrating sphere light-emitting component, the integrating sphere body below is equipped with integrating sphere light source.

This invention relates to the field of holographic display and optical measurement technology, specifically disclosing a brightness testing system and method for reflective hologram displays based on an integrating sphere. The method uses a single-wavelength laser, spatially filtered and collimated, incident at a specific angle onto a reflective hologram placed within an integrating sphere for reconstruction. The integrating sphere is used to integrate and collect the multi-angle, non-uniform light rays diffracted from the hologram, and a light trap is used to suppress the zero-order reflection background. System calibration is performed using a standard diffuse white plate, and the absolute diffraction efficiency of the hologram is finally calculated. This invention effectively solves the problem that traditional point measurement methods are difficult to accurately obtain the total diffracted light flux of a hologram, and is suitable for the quantitative evaluation of the brightness and efficiency of diffractive optical elements such as reflective holograms and volume holographic gratings.

This invention provides a device and method for measuring diffuse reflectance, comprising a single visible light source, a diffuse reflectance integrating sphere, a first receiver, a second receiver, and a processor. The diffuse reflectance integrating sphere is positioned below the single visible light source. The first and second receivers are positioned vertically on the same side of the single visible light source. A side of the diffuse reflectance integrating sphere is used to place the sample to be tested, which is located on the opposite side of the single visible light source. The first and second receivers are electrically connected to the processor. The single visible light source generates a light signal, one of which is received by the first receiver. Simultaneously, another light signal, under the influence of the diffuse reflectance integrating sphere, causes diffuse reflection from the sample to be tested, and the diffusely reflected light signal is received by the second receiver. The processor calculates the diffuse reflectance of the sample based on the light signals received by the first and second receivers. This method not only provides high measurement stability but also reduces measurement errors and improves measurement efficiency.

The utility model discloses an image test equipment of simulating sun and moon light condition, including the inside integral sphere with analog light source, be used for fixing and moving the mobile base of integral sphere, be located integral sphere one side's light outlet, the outside of light outlet is equipped with the box type light source simulator for providing analog ambient light, be equipped with the moon phase simulation adjusting mechanism between the box type light source simulator with light outlet, the light transmission shape of light outlet forms the moon phase conversion of different shape after adjusting through moon phase simulation adjusting mechanism. Can accurate simulation sun, moon light condition and the different form of moon phase to provide more reliable comprehensive test environment for camera detection, and more effective iteration promotes the image quality of camera under more complex weak light light environment.

This invention discloses a testing apparatus and method for directional reflective devices, including a collimated light source, a through-hole observation screen, a directional reflective device, a photodetector I for monitoring retroreflection, a beam splitter, an integrating sphere I for monitoring the collimated light source, an integrating sphere II for monitoring retroreflection, and a photodetector II for monitoring the collimated light source. This invention fills a gap in current professional testing methods in this field by establishing a dedicated testing apparatus and method for directional reflective devices. Through the implementation of this invention, key performance parameters such as the reflected light field distribution, reflected light field intensity, and directional reflectivity of the directional reflective device can be systematically and accurately obtained, achieving a comprehensive quantitative evaluation of the device's optical performance. This apparatus and method can not only accurately identify structural errors and defects generated during the production process but also further analyze the causes of defects, providing a reliable basis for process optimization, thereby significantly improving the accuracy and consistency of pre-shipment product testing.

HIGH-LUMINANCE INTEGRATING SPHERE COMPATIBLE WITH VACUUM OR AMBIENT ENVIRONMENT The invention relates to an integrating sphere comprising a body delimiting an integration chamber and having at least two access windows to the integration chamber from outside the body. According to the invention, the body of the integrating sphere includes at least one cooling channel for the circulation of a heat transfer fluid. Figure for the abstract: Figure 2

The present invention provides a near-infrared spectral system and a carbonaceous analysis method for carbonaceous analysis. The near-infrared spectral system includes a light source, a coaxial optical path, an integrating sphere, and a spectrometer. The integrating sphere includes a light source inlet, a sample reflector, and a diffuse reflection outlet. The coaxial optical path is positioned between the light source and the integrating sphere and is coaxial with the integrating sphere. The distance between the coaxial optical path and the light source and the distance between the coaxial optical path and the integrating sphere are set so that light emitted from the light source enters the light source inlet and first irradiates the sample at the sample reflector without being directly diffusely reflected by the integrating sphere. The relative position of the sample reflector and the diffuse reflection outlet of the integrating sphere is set so that the reflected light from the sample is diffusely reflected multiple times within the integrating sphere before passing through the diffuse reflection outlet and entering the spectrometer. The spectrometer is used to generate spectral data of the sample. The spectrometer of the present invention is positioned at the rear, allows for easy replacement of different light sources depending on the signal intensity of the sample, has a compact and small structure, high light intensity, and a high signal-to-noise ratio.

A colorimeter 1 that measures a chromaticity of a measured object A comprises: a first light source unit 11 that emits first irradiation light having a first spectrum S1; a second light source unit 12 that emits second irradiation light having a second spectrum S2 different from the first spectrum S1; an integrating sphere 61 that has irradiation light including the first irradiation light and the second irradiation light incident thereon; a light receiver 20 that detects measured light resulting from irradiation of the measured object A with the irradiation light emitted from the integrating sphere 61; and a controller 50 that calculates an optical spectrum of the measured light based on a detection signal of the measured light. A superimposed spectrum S of the first spectrum S1 and the second spectrum S2 corresponds to a reference spectrum S0 of a standard light source as reference for calculating the chromaticity.

The invention discloses a method for observing spatial distribution characteristics of deuterium and impurities of a lower divertor by using hyperspectral imaging, which comprises the following steps of: when a magnetic confinement fusion device runs, realizing multiband 2D image observation of a lower divertor region through a hyperspectral camera, and realizing continuous recording of emission spectral lines of deuterium and impurity elements of the lower divertor; arranging the obtained multiband spectral intensity data in the 2D space, establishing a corresponding database according to corresponding shot numbers, and carrying out calibration analysis on spectral information intensity recorded by a camera through an integrating sphere standard light source to obtain absolute intensity data of emission spectral lines in the multiband; and determining corresponding element information by combining the special emission spectral line wavelengths of different elements recorded in the ADAS atom database. Multiband spectral information data recorded by hyperspectral imaging can provide a basis for research on spatial 2D profile distribution of boundary plasma parameters and tungsten impurity spectral lines, and provide data support for evaluation of first wall tungsten impurity source distribution and tungsten impurity sputtering conditions.

The application provides a temperature measurement system and method based on fluorescence imaging and ratio in a microwave field, adopts a combined mode of fluorescence imaging and fluorescence spectrometry, and divides fluorescence emitted by a chemical reaction container into two paths by an integrating sphere module; first path emergent light enters a fluorescence imaging module, and temperature distribution on a surface of the container is directly reflected by fluorescence imaging; second path emergent light enters a fluorescence spectrometry temperature measurement module, and temperature on the surface of the container is measured according to a characteristic peak of a fluorescent body and a Boltzmann-thermal law. Non-contact optical temperature measurement with high performance is realized, and spatial resolution in a temperature measurement process in the microwave field is improved.

The invention relates to an integrating sphere comprising a body delimiting an integration chamber and having at least two access windows to the integration chamber from outside the body. According to the invention, the body of the integrating sphere includes at least one cooling channel for the circulation of a heat transfer fluid.

The application discloses an infrared focal plane array modulation transfer function testing device and method, which comprises an infrared light source, a knife-edge target, a manual rotating table, an imaging optical system, an infrared focal plane array detector, a three-dimensional displacement mechanism, a driving and data acquisition system and a control computer; the infrared light source comprises two light sources of a surface source black body and an integrating sphere, the surface source black body is used for testing a focal plane detector in a mid-infrared and far-infrared response band, and the integrating sphere light source is used for testing a short-wave infrared focal plane detector; the knife-edge target is installed on the manual rotating table, the imaging optical system is located between the knife-edge and the infrared focal plane array detector, the infrared focal plane array detector is arranged on the three-dimensional displacement mechanism, the driving and data acquisition system is connected with the infrared focal plane array detector and the control computer respectively, and the control computer is also connected with the three-dimensional displacement mechanism and the infrared light source respectively. The application has the advantages of wide application, convenient testing, comprehensive testing parameters, high testing accuracy and the like.

The application discloses a variable-angle multi-wavelength total-integral scattering measurement device and method. The device comprises a light source module, a laser adjusting platform, an integrating sphere, a sample height adjusting platform and a detection module. The light source module generates collimated laser. The laser adjusting platform bears the light source module and changes the incident angle of laser on the sample surface. The surface of the integrating sphere is symmetrically provided with a plurality of incident light holes and reflected light light-out holes. The incident light holes are used for receiving the incident light of the laser, and the reflected light light-out holes are used for emitting the reflected light of the sample. The sample height adjusting platform is used for bearing the measured sample and adjusting the height of the measured sample. The detection module comprises a photoelectric detector and a lock-in amplifier. The photoelectric detector is used for receiving the light signal of the scattered light light-out hole. The lock-in amplifier is used for extracting the voltage signal of the scattered light from the light signal. The device realizes continuous adjustment of the incident angle, eliminates the system error caused by the thickness difference and improves the sample adaptability. In addition, the device supports multi-wavelength measurement, effectively suppresses the noise and improves the signal-to-noise ratio by combining the design of the integrating sphere collection, reflected light leading-out and absorption.

The application provides a kind of laser pumping automatic testing device and method, including three kinds of measuring functions of divergence angle, wavelength and power, wherein divergence angle value measurement adopts measurement head to rotate swing in light beam path and records and calculates light intensity distribution point by point, finally calculates NA value;Wavelength is measured by integrating the spectrometer probe inside the integrating sphere;Power is indirectly measured by integrating photodiode inside the integrating sphere.The laser pumping automatic testing device is composed of stock bin, first storage station, second storage station, laser beam divergence angle measuring mechanism, water wiping mechanism, wavelength and power testing mechanism, and discharge bin.The laser pump is fixed inside the customized fixture, and the double-head manipulator completes the automatic production conversion of pump source between each station by carrying the fixture.The laser pumping automatic testing device provided by the application can realize the automatic testing of three kinds of measuring functions of laser divergence angle, wavelength and power, and has high testing precision.

The application discloses a kind of modular laser device testing devices, it is related to laser performance test technical field, comprising: detachable stage module, for carrying M×N array arrangement laser device;Base module, detachably connected with the stage module, including power supply interface matrix and cooling liquid flow channel;Three-axis mechanical arm module, suspended above detachable stage module, end carries integrating sphere optical test head;Multi-channel independent power supply system, provides independent controllable power supply channel to stage module by the base module;Linkage control system, integrated current / temperature / optical sensor.The application uses Hall current sensor and PID control algorithm by multi-channel independent power supply system, suppresses current fluctuation, compared with traditional scheme, so that detection accuracy is improved.Simultaneously, base cooling system and stage metal straight guide path cooperate, reduce thermal resistance, reduce temperature fluctuation, avoid local overheating to cause device performance degradation, ensure that test environment is stable.

A photodetector includes a flow cell configured to allow a liquid sample containing nanoparticles to flow, a laser generating unit irradiating a pulsed laser beam on the flow cell and generating a plasma, a flow control unit controlling a flow of the liquid sample inside the flow cell, an integrating sphere reflecting multiply an optical signal from the plasma, and a spectrometer measuring the optical signal reflected from the integrating sphere.

The present application relates to the technical field of photoelectric detector testing, and discloses a standard evaluation method for linearity of photoconductive signals of a tester, comprising: configuring an independent driving narrow-band light source coupled to an integrating sphere to build a binary-weighted light flux synthesis environment; measuring a thermal time constant of a detector, defining a test cycle containing a measurement time slot and a thermal compensation time slot, and setting a single-cycle target total dissipated energy; opening a light source combination according to a binary control code, collecting instantaneous response current under the condition that a constant measurement bias voltage is applied to maintain a constant internal electric field of the detector; calculating an energy gap based on the principle of energy conservation, applying a dynamic compensation voltage pulse to perform dark-state thermal injection in the thermal compensation time slot, and maintaining a constant detector lattice temperature; traversing the full dynamic range, and calculating linearity deviation by using the superposition principle. The time-division multiplexing electrothermal compensation mechanism keeps the total dissipated energy of the detector constant during the testing process.

The application discloses a calibration method and device of a wide-band irradiance meter with high irradiance. The method comprises the following steps: calibrating a spectral radiometric device to obtain a spectral correction coefficient; measuring spectral radiant flux of a fiber type wide-band light source and correcting the spectral radiant flux by using the spectral correction coefficient to obtain corrected spectral radiant flux; calculating radiant flux of a predetermined wave band according to the corrected spectral radiant flux; calculating a radiant illuminance value of a fiber output port as a standard value according to the radiant flux of the predetermined wave band; measuring a reading of a measured irradiance meter at the same fiber output port, comparing the reading with the standard value, and obtaining a calibration result. The application solves the problem that the existing light track method cannot be adapted to the fiber type irradiance meter by combining an integrating sphere with a standard fiber and introducing a fiber output light source into the integrating sphere to homogenize light. The radiant illuminance is accurately calculated by using a standard lamp calibration and a fiber end surface area, near distance measurement error is avoided, and accurate calibration of high irradiance is realized.

The application belongs to the technical field of photoelectric testing, and discloses a testing and sorting device with an LED placed inside an integrating sphere, which comprises a material moving assembly, a material feeding station, a centering station, a testing station and a material discharging station. The centering station comprises a mechanical centering assembly, which comprises a centering mold and a centering mold driving member. The centering mold is used for clamping the material to be tested, and the centering mold driving member is used for driving the centering mold to move so as to center the material to be tested on the carrier. The testing station is used for measuring the energized test data of the material to be tested, and comprises an integrating sphere, a probe base and a jacking assembly. The probe base is arranged inside the integrating sphere, and comprises a probe. The jacking assembly is used for pushing the carrier to move upwards so that the material to be tested enters the inside of the integrating sphere and abuts against the probe. The material discharging station is used for sorting the tested material from the carrier according to the energized test data. The application realizes effective collection and stable measurement of full-angle light parameters of side-emitting products, and significantly improves the testing accuracy and repeatability of key indicators such as luminous flux and light intensity distribution.

The disclosure relates to an integrating sphere having a body delimiting an integration chamber and being provided with at least two access windows to the integration chamber from the outside of the body. The body of the integrating sphere includes at least one cooling channel for the circulation of a heat transfer fluid.