50 results about "Standard illuminant" patented technology

The utility model discloses a self-calibration multi-grating monochromator. The self-calibration multi-grating monochromator comprises a self-calibration assembly, a grating spectrum system assembly and an optical receiver. The self-calibration assembly comprises a focus lens, a standard light source and a single-face reflector. And the standard light source is used for emitting a light beam with a specified wavelength to the single-sided reflector. And the single-sided reflector is used for reflecting the light beam to the focus lens, and the light beam is focused to the incident end of the grating spectrum system assembly through the focus lens. According to the utility model, an automatic calibration structure composed of the standard light source and the single-sided reflector is arranged at the incident end of the grating spectrum system assembly, so that the monochromator can emit a light beam with a specified wavelength through the standard light source when being used for a long time, and automatic calibration of the grating spectrum system assembly is realized in cooperation with the light receiver. Besides, the single-sided reflector is installed on the sliding rotary table, so that the single-sided reflector gives way when the grating spectrum system assembly is normally used, and interference with external light is avoided when the grating spectrum system assembly is normally used.

The utility model provides a kind of optical intensity adjustable optical filter switching device, belong to filter production technical field, including support assembly, including base, the support table of rotation connection in base end part, the support rod of fixed connection in support table end part and the connecting column of fixed connection in support table center;Switching assembly, including fixed mounting in the connecting piece of connecting column end part, hinged in the connecting piece end part link, the extension rod of insertion in link end part, the clamping block of fixed connection in the extension rod end part and the filter frame body of clamping in the clamping block end part.The utility model has the beneficial effects of: realize the flexible control of filter in three-dimensional space, can be adapted to the optical path demand of different light source, different detection equipment, expand applicable scene, shorten filter switching time, can be quickly completed filter loading and unloading, without other auxiliary tools, improve the efficiency of multiple filter alternate test.Auxiliary lamp panel provides standard light source, without external device can be completed filter light transmission performance test.

To provide a laminated film improved in adhesion while having good optical characteristics, and a method for manufacturing the laminated film.SOLUTION: The laminated film 1 of the present invention includes a base film 2, a cured resin layer 3 disposed on one surface in the thickness direction of the base film 2, and an inorganic material layer 4 disposed on one surface in the thickness direction of the cured resin layer 3. The ratio of the ion intensity of the C3H3O2 fragment to the ion intensity of the HSi2O5 fragment measured by time-of-flight secondary ion mass spectrometry is 1.0 * 10 - 1 or more. In addition, the total reflectance of the laminated film 1 from one side in the thickness direction of the inorganic material layer 4 with respect to irradiated light of wavelengths 380nm to 780nm of a standard illuminant D65 is 0.40% or less.SELECTED DRAWING: Figure 1

The tongue color correction method based on a deep convolutional neural network relates to the field of medical image color correction, and solves the problems of color deviation of tongue image data generated by mobile devices in non-standard light source environment, tongue color image color distortion and the like, and the like.The present application collects picture data under standard illumination with a mobile device, uniformly scales, and enhances data; then collects data under a color-biased light source environment, and uniformly scales. The dataset under the standard light source is trained using a deep convolutional neural network, and the output result of the neural network is given to the downstream to perform a classification task on each pixel point. Each pixel point is converted from an RGB space to an HSV space, the distance of each current pixel point from the nearest point on the HSV space is calculated, the nearest pixel value is taken as a standard value, the RGB value corresponding to the HSV is finally calculated for color space restoration, and finally, tongue image color correction is realized. The present application restores the true color of the tongue image to the greatest extent.

The invention relates to the technical field of dust concentration detection, and particularly provides a photoelectric dust concentration detector for continuously detecting dust concentration in fire and explosion prevention, which comprises a base. The first standard light source emits light with specific light intensity, after the light beam passes through an environment to be detected, the light intensity detector located on the right side can detect the emergent light intensity, meanwhile, the light intensity detector located in the front can detect the reflected light intensity, and then the dust concentration is obtained after calculation is conducted through the calculation component. The second mounting plate and the first mounting plate are rotationally connected through a connecting shaft and are fixed through a manual adjusting bolt, a fixing block, a clamping block and a limiting gear at the same time, a light intensity detector used for detecting the intensity of reflected light can be rotated to different positions, an extension spring is stretched by pulling down an insertion fixing rod, and the upper end of the insertion fixing rod is separated from the interior of an insertion fixing hole. Therefore, the plug board can be moved, the positions of the two light intensity detectors can be adjusted, and the distance between the light intensity detectors and the first standard light source can be changed.

This invention discloses a calibration method and device for a spectroscopic laser-induced phosphorescence imaging system. The calibration method includes: selecting a homogenizing plate as a standard light source and placing the emitting surface of the homogenizing plate at the focal plane of the imaging system; setting the acquisition frequency, total acquisition time, and N different exposure times, and acquiring N sets of grayscale images obtained by the imaging system under different exposure times; averaging the pixel values ​​of the N sets of grayscale images to obtain the image grayscale matrix of each set of grayscale images; performing linear fitting using the least squares method on the set of grayscale matrices under the N exposure times to obtain the bias correction matrix and gain correction matrix; and correcting the original response grayscale matrix obtained under the test state based on the obtained bias correction matrix and gain correction matrix.

The invention belongs to the technical field of sensor correction, and provides an illuminance correction method and an illuminance sensor under the natural light condition of facility horticulture. The method comprises the following steps: respectively determining an initial illuminance compensation coefficient corresponding to each test incident angle of an illuminance sensor under a standard light source; establishing a mapping relation between the test incident angle and the initial illuminance compensation coefficient; determining the illuminance sensor and the current incident angle of light incident to the light sensing surface of the illuminance sensor; acquiring a current measurement value of the illuminance sensor; when the illuminance sensor is placed in the natural light environment and the illumination condition reaches the standard, determining a target illuminance compensation coefficient from the initial illuminance compensation coefficients according to the mapping relation and the current incident angle; and performing compensation processing on the current measurement value based on the target illuminance compensation coefficient to determine a target illuminance value. According to the invention, errors caused by the installation inclination angle or the sun position change of a traditional illuminance sensor can be effectively overcome, and the accuracy of illuminance detection is improved.

This utility model discloses a rapid peanut seed coat color comparison and sampling device. The core structure includes a cutting blade, a base, a locking mechanism, a contrast color card, and a slot. The cutting blade is connected to the base via a T-shaped moving groove and a sliding locking mechanism, allowing it to slide precisely along the T-shaped sliding groove of the base and locking mechanism. Its cutting surface is used to slice the peanut within the slot. Locking rings on both sides of the base cooperate with the locking mechanism inserts to securely fix the peanut. A contrast color card is embedded above the base, and the edge of the slot has a chamfered bevel to facilitate peanut placement and prevent damage to the seed coat. In use, the peanut is placed in the slot with tweezers. After the cutting blade slices the peanut, the seed coat color can be directly compared using the contrast color card under a standard light source. Magnifying glasses, image recognition software, and other auxiliary tools can be used to improve comparison accuracy and efficiency. This device effectively solves the problems of unstable cutting, easy sample contamination, and inconvenient comparison in existing devices, exhibiting high structural integration and simple operation.

Disclosed are: a stress luminescent material which has an afterglow luminance of 17 mcd / m2 or less at one minute after being irradiated for 20 minutes with light having an illuminance of 200 lx using a standard light source D65; a stress luminescent material which has a composition represented by SrpEuqM1rAl2 + tO4 + u; and a stress luminescent material which has a composition represented by SrpEuqLarM2sAl2 + tO4 + u.

The invention relates to the technical field of traditional Chinese medicine detection, and discloses a lycium barbarum root bark quality rapid nondestructive detection method based on hue angle, which comprises the following steps: collecting reflection spectrum chromaticity signals of the surface of lycium barbarum root bark to be detected in a standard light source environment, and calculating the average hue angle; and substituting the average hue angle as an input variable into a preset functional component prediction model for calculation, and directly outputting the predicted contents of kukoamine A, kukoamine B and total flavonoids in the sample to be detected. The prediction model is a unary linear regression equation constructed based on a large amount of experimental data, and a quantitative mapping relation between the appearance hue angle and the internal chemical component content is determined. According to the method, optical detection is used for replacing traditional chemical analysis, the physical form of a sample does not need to be damaged, no chemical reagent is consumed, rapid, low-cost and objective evaluation on the internal quality of the boxthorn root bark is achieved, and the method is suitable for batch screening and grading of a medicinal material circulation site.

A liquid crystal display according to one embodiment of the present invention is provided with a backlight unit having a blue LED light source and a color conversion sheet, and a liquid crystal panel. When the initial chromaticity of the backlight unit is set as x0 and the chromaticity of the backlight unit after the blue LED light source is turned on for 2000 hours under the condition that the input power per unit area of the liquid crystal display is 170 W / m2 in a temperature environment of 50 DEG C is set as x1, the relationship between x0 and x1 is 0.001 < = x1-x0 < = 0.020. The color conversion sheet contains at least a light-emitting material and a binder resin. The chromaticity (x2) of the liquid crystal panel after light from a CIE standard light source (D65) passes through the liquid crystal panel is 0.335 or less.

The invention provides a display device. The display device comprises a display panel and an anti-reflection film. The anti-reflection film is arranged on the display panel. The anti-reflection film comprises a first high refractive index layer and a first low refractive index layer which are stacked in sequence. A thickness of the first high refractive index layer is greater than a thickness of the first low refractive index layer. Under the irradiation of a CIE standard illuminant D65 light source, the reflected light of the display device meets the following conditions in a CIE L * a * b * color space: 0 > = a * > =-6, and 0 > = b * > =-6. The display device can reduce the reflectivity of ambient light or improve the visual effect.

The invention provides an automatic spectrograph debugging device and method, and the device comprises a standard light source module which is used for providing a reference light signal with a known characteristic spectral line for a to-be-debugged spectrograph; the grating adjusting mechanism comprises an electric rotary displacement table and a linear displacement table, the electric rotary displacement table is used for driving a grating in the spectrometer to rotate around a shaft so as to adjust wavelength accuracy, and the linear displacement table is used for translating the grating in the light path direction so as to adjust spectral resolution; the spectrum acquisition module is used for acquiring spectrum data processed by the spectrograph in real time; a reference spectrum is excited through a multi-spectral-line standard light source, the peak position and the full width at half maximum are accurately extracted by adopting spline interpolation, an electric rotary displacement table and a linear displacement table are driven to perform two-dimensional closed-loop adjustment on a grating, and the wavelength-pixel non-linear mapping correction and convergence criterion are combined, so that the resolution of the grating is improved. And full-automatic high-precision calibration of wavelength accuracy and spectral resolution is realized.

The present application relates to a kind of automobile interior atmosphere lamp color calibration methods based on multi-channel fiber synchronous acquisition, color calibration is carried out by the measuring system of two-stage calibration, wherein two-stage calibration includes first stage: under the same geometric condition, the same region of the N fiber probes is simultaneously aligned with a uniformity standard light source, the original spectral signal of each channel is synchronously collected, the relative spectral response correction coefficient of each channel relative to reference channel is calculated based on the signal;Second stage: select a standard transfer light source measured, and using any one specified fiber probe calibrated by the first stage, under standard geometric conditions, the standard transfer light source is aligned and collected, to obtain the original signal;Combined with the known absolute spectral radiance value of the standard transfer light source and the corresponding, the absolute spectral responsivity function of the entire system is calculated.The present application can multi-channel synchronous acquisition, and greatly shorten the measurement time.

Embodiments of the present application disclose a PCB ink color classification method, device and system for Micro-LED. The method comprises: acquiring a target circuit board image collected under linear light source irradiation of a target printed circuit board to be classified; performing regional division on the target circuit board image to obtain a plurality of target region images corresponding to the target printed circuit board; determining a first reflectivity corresponding to each target region image based on standard light source information of the linear light source, determining a second reflectivity and a target reflectivity range corresponding to the target printed circuit board based on the first reflectivity; performing ink color classification based on the second reflectivity, the target reflectivity range and a preset reflectivity variation range corresponding to each ink color category to determine a target ink color category corresponding to the target printed circuit board, thereby realizing ink color classification of the printed circuit board, ensuring ink color consistency after assembly of the printed circuit board, avoiding poor ink color effect and improving display quality of the display screen.

This invention provides a method and system for color correction of facial recognition images based on multispectral ambient light detection, belonging to the fields of image processing and computer vision technology. The method simultaneously acquires an initial facial image and an ambient light intensity sequence. It utilizes the spectral scattering difference between the epidermis and dermis to perform multidimensional decomposition of the image, separating the facial background image from the illumination interference image. Based on luminous flux characteristics, the interference image is decoupled into surface reflection and subcutaneous scattering images, and the incident light path is extracted. A facial undulation gradient is constructed from the background image, and a light decay mapping table is generated by combining it with the ambient light phase delay, thereby calculating the color difference compensation matrix. Subsequently, phase synchronization is performed using the spectral phase difference to obtain the target correction matrix. Finally, pixel spectral reconstruction is performed based on this matrix, and standard light source rendering is applied. This invention effectively eliminates the influence of complex illumination and significantly improves the color reproduction accuracy of facial recognition.

The utility model belongs to the field of detection equipment matching devices. A support is arranged at the bottom of a box body, an observation hole is formed in the top face of the box body, a standard light source and an ultraviolet light source are installed on the inner wall of the top face of the box body, a transmission curtain is arranged on the bottom face of the box body, the transmission curtain is a double-color curtain formed by splicing a dark color and a light color, and the double-color curtain is arranged on a transmission wheel set. The transmission wheel set is installed on the support to form a transmission curtain, and curtain channels are formed in the left side and the right side of the box body. The standard light source and the ultraviolet light source can be exchanged and controlled. The standard light source adopts a single lighting lamp tube for lighting, and according to the fact that aflatoxin can emit light blue or light green fluorescence under ultraviolet irradiation, when an ultraviolet lamp tube is selected for irradiation, whether grains are infected with aflatoxin or not can be detected, and the pollution degree of the grains can be judged. The bottom of the observation box adopts two background colors of dark color and light color, so that sensory comparison is facilitated. Grain is observed through the observation box, the sensory inspection lighting environment is improved, and the grain quality is conveniently judged.

The utility model discloses a kind of eyeglasses frame chromatic aberration rating measuring devices, including light source box, camera module, sample rotary table and computer;The light source box adopts fully enclosed structure, its inner wall is diffuse reflection layer, top is equipped with D65 standard light source, light source incidence direction is 45 ° angle with sample surface;The camera module is installed in light source box top center, is equipped with adjustable focal length lens and detachable polarized filter;The sample rotary table is coaxially arranged in light source box with camera module, bottom is connected lifting component, surface places sample substrate;Fixed device is provided on the sample rotary table, sample substrate is placed in the center of the sample rotary table;Sample and multiple standard gray sample card are dispersed symmetrically placed on the same sample substrate.

The invention relates to dyed cloth cover color difference detecting and sorting equipment based on machine vision and a method thereof, and belongs to the technical field of textile printing and dyeing quality detection.The dyed cloth cover color difference detecting and sorting equipment comprises a flattening traction module, an online detection module, a sorting execution module and a central control module; the online detection module comprises a hyperspectral imaging unit and a color area array imaging unit, the hyperspectral imaging unit is used for collecting cloth surface reflection spectrum information, and the color area array imaging unit is used for collecting cloth surface color texture images. The high-precision and high-stability color difference analysis is achieved based on hyperspectrum, the measurement precision which is advanced in the industry and can be traced to the spectrum reference is provided, the standard light source illumination unit which is integrated is matched, the consistency of detection conditions and the stability of results at different times and different batches are ensured, and data authority and reliability are achieved.

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 application relates to the technical field of intelligent detection, and particularly discloses a traditional Chinese medicine dyeing color uniformity detection method and system. The original RGB image of a to-be-detected fabric is collected under a standard light source, an effective fabric area image is obtained after color correction and appearance compensation, fabric texture energy prior information is extracted through frequency domain transformation combined with a dye penetration uniformity index, a multi-space level image sequence is constructed, the texture prior information is fused, and then input into a pre-trained texture-color decoupling neural network, a color purity feature image with texture interference inhibited is output, quantitative indexes such as a dye distribution standard deviation and an average gradient amplitude are calculated, a local non-uniformity heat map is generated to locate defects, a uniformity grade and a visual report containing an original image and a defect contour are output. The application is suitable for traditional Chinese medicine dyeing, can realize accurate decoupling of texture and color, highlight weak dyeing differences, and is suitable for different materials and dye types, so that the detection precision of traditional Chinese medicine dyeing uniformity is improved.

A display device includes a display panel and an anti-reflective film. The anti-reflective film is disposed on the display panel. The anti-reflective film includes a first high refractive index layer and a first low refractive index layer stacked in sequence. A thickness of the first high refractive index layer is greater than a thickness of the first low refractive index layer. Under irradiation of a CIE standard illuminant D65 light source, a reflected light of the display device satisfies the following conditions in the CIE L*a*b* color space: 0≥a*≥−6 and 0≥b*≥−6. The display device of the disclosure may reduce reflectivity of ambient light or improve visual effects.

The utility model relates to a spectral analysis technology, and particularly discloses a wavelength-calibratable rotating grating spectrometer which comprises a wavelength screening element, a first collimating element, a rotating grating, a focusing element and a detector which are sequentially arranged along a light path of incident light, and further comprises a standard light source and a second collimating element, the standard light source is arranged between the wavelength screening element and the detector along the light path of the incident light, the light emitting side of the standard light source faces the rotating grating, and the second collimating element is arranged on the light emitting side of the standard light source. The rotating grating spectrometer capable of calibrating the wavelength can realize real-time wavelength calibration.

This invention discloses an infrared weak light radiation calibration device and method for optoelectronic reconnaissance equipment, belonging to the field of optoelectronic technology. The calibration device includes an infrared light source system, an infrared beam transmission channel, the optoelectronic reconnaissance equipment under test, a vacuum interface, a vacuum enclosure, a first off-axis parabolic reflector, a field stop, a second off-axis parabolic reflector, a filter, a third off-axis parabolic reflector, a blocking impurity band detector, a pulse tube cooler, and a vacuum pump unit. The blocking impurity band detector of this invention has advantages such as high sensitivity, large array size, wide detection spectrum, and fast response speed; it can achieve picowatt-level optical radiation power measurement and calibration, and its unique performance is widely used in fields such as space imaging; using the blocking impurity band detector as a value transfer detector can improve measurement accuracy, reduce the influence of standard light source power fluctuations, and improve measurement accuracy.

Provided is a radio wave reflector that can reflect radio waves while the intensity thereof is maintained and that can maintain the scenery. The radio wave reflector of the present invention is a radio wave reflector for reflecting radio waves, wherein the intensity of a reflective wave as specular reflection of an incident wave is −30 dB or more relative to the intensity of the incident wave at a frequency, and the radio wave reflector has a total light transmittance of 65% or more as measured using a standard illuminant D65.

This invention relates to the field of spectroscopic instrument calibration technology, and discloses a spectral wavelength calibration method based on grating dispersion and spatial filtering, comprising: 1. incident collimated light from a broadband light source onto a grating; 2. setting a spatial filter that can move along the dispersion direction near the image plane of the dispersive optical path, and selecting narrowband light with different center wavelengths from the continuous spectrum by moving the filter; 3. for each filter position, measuring the center wavelength of the selected narrowband light using a high-precision spectrometer, and capturing a spot image using a detector array to be calibrated; 4. extracting the centroid pixel coordinates of the spot from the image; 5. fitting the wavelength and pixel coordinates to establish a calibration equation between the pixel coordinates and the wavelength. This invention does not overly rely on discrete standard light sources, can actively and continuously acquire high-density calibration points, the process is easy to automate, and the calibration accuracy is high, making it suitable for online calibration of miniaturized and integrated spectrometers.

This invention belongs to the field of headlight calibrator testing technology, specifically a CCD visual perception-based intelligent traceability and evaluation system for headlight calibrators. It includes a screen support assembly and a sample standard light source. The screen support assembly is placed on the ground, and a high-precision illuminance meter module is connected to its right end. The high-precision illuminance meter module is used for image acquisition and processing of the light source illuminated by the sample standard light source. A multi-dimensional stage assembly is set on the right end of the screen support assembly, and the sample standard light source is mounted on the upper surface of the multi-dimensional stage assembly. This invention can increase the detection accuracy of headlight calibrators and solve technical problems in traditional light source detection, such as the susceptibility of spot detection in complex environments to noise interference leading to positioning failure; poor universality of traditional segmentation algorithms when spot shapes are varied; insufficient accuracy due to neglecting light intensity distribution in centroid positioning; and reliance on manual sampling for uniformity analysis, which cannot provide real-time feedback on defects.

This invention provides a fiber optic spectrometer measurement method, comprising: acquiring a light to be measured; substituting the pixel number of the light to be measured into a calibrated wavelength variation curve polynomial to obtain the wavelength corresponding to the pixel number; plotting the spectral curve of the light to be measured based on the correspondence between the wavelength and the pixel number; calculating and analyzing the parameter characteristics of the light to be measured based on the spectral curve, wherein the parameter characteristics include at least one or more of reflectivity, transmittance, absorbance, and chromaticity coordinates. This invention uses standard light source spectral calibration to obtain the wavelength variation curve polynomial of the standard light source spectrum. The measured spectral curve is fitted using this wavelength variation curve polynomial, correcting the testing deviation between spectrometers of different specifications and improving testing accuracy; it also enables multiple testing functions and is highly practical.

1. Name of the product in this design: LED Standard Light Source Box (Multi-channel). 2. Purpose of this design: A lighting box used to simulate various ambient lighting conditions. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.