108 results about "Colorimeter" patented technology

To provide a computer color-matching apparatus comprising (A) a colorimeter, (B) a micro-brilliance-feeling measuring device, and (C) a computer in which a plurality of paint blends, the color data and micro-brilliance-feeling data corresponding to each of the paint blends, and the color characteristic data and micro-brilliance-feeling characteristic of a plurality of full-color paints are entered and a color-matching-calculation logic operates and a computer color-matching method for brilliant paints of executing the following steps by the computer color-matching apparatus: (1) a step of measuring the paint film of a reference color by a colorimeter to obtain the color data of the reference color, (2) a step of measuring the paint film of a reference color by a micro-brilliance-feeling measuring device to obtain micro-brilliance-feeling data of the reference color, and (3) a step of comparing the color data and micro-brilliance-feeling data of the reference color with the color data and micro-brilliance-feeling data corresponding to the paint blend previously entered in a computer, and selecting a prospective paint blend.

A toner for developing an electrostatic image includes a binder resin, a colorant and a wax. The toner shows heat-absorption characteristics represented by a DSC heat-absorption curve obtained on temperature increase in a temperature range of 30-150 DEG C. by a differential scanning colorimeter (DSC). The DSC heat-absorption curve shows a maximum heat-absorption peak (P1) in a temperature range of 70-90 DEG C. The DSC curve also provides a differential curve showing a first maximum (Max1) on a lowest temperature side at a temperature (T1) of 50-65 DEG C., showing a second maximum (Max2) on a next lowest temperature side at a temperature (T2) of 65-85 DEG C., and showing a minimum (Min1) on a highest temperature side at a temperature (T3) of at least 95 DEG C. Because of the DSC heat-absorption characteristics, the toner exhibits excellent fixability (including anti-offset characteristic) over a wide temperature range and excellent continuous image forming characteristic.

A method and apparatus for calibrating color temperature of color display devices aims to calibrate output bases of RGB three original color lights of a color display device so that different color display devices can radiate the same color temperature in the same color temperature settings. The method of the invention uses a colorimeter to obtain current chromaticity value radiated from the color display device in a standard color representation system and in the condition of known output bases of the current three original color light signals, and through calculation to obtain the proportional relationship of the current radiating color temperature and an objective color temperature in the same standard color representation system, and based on which to derive the output bases of the required three original color light signals corresponding to the objective color temperature to be calibrated. The results are written through the apparatus into a color profile of the color display device.

The invention relates to a flow injection ammonia nitrogen color matching detection method, belonging to analytical chemistry technical field, which comprises injecting release solution as dilute NaOH solution into a capillary pipeline system connected with a gas liquid separator, injecting quantitative water sample to flow and circulate along with the release liquid in the capillary pipeline system, releasing ammonia from the water sample at the deep groove of the gas liquid separator and penetrate a ventilated membrane to be absorbed by acid-base indicator receive solution of more acid in another capillary groove at another side of the membrane, to change the color of the acid-base indicator, and feeding the receive solution absorbed with ammonia into a flow-through cell of a chromometer, using the photoelectric colorimeter to test the change of translucent photoelectric voltage and calculating out the ammonia nitrogen density of the sample water. The invention further provides a relative device. The invention can realize online detection of ammonia and nitrogen contents of water or solution quickly and simply, with accurate and reliable detected data, which only needs 50ul-1ml water sample injected in one time, low agent consumption, low cost and safe agents.

A method for determining the optimal colorant thicknesses and linear combinations for integral illuminant-weighted CIE color-matching filters is provided. A reflectance colorimeter for configuring printers may be designed using this method.

A correction LED is provided to illuminate a light receiving sensor array, and a calculation controlling circuit calculates correction values at the respective illuminance levels based on sensor output levels expected at the respective illuminance levels and actual sensor output levels while successively turning the correction LED on at a plurality of illuminance levels whose illuminance ratios are at least known, and corrects a sensor output level by the corresponding correction value to obtain a measurement output at the time of an actual measurement. The discontinuity of an input / output characteristic resulting from the switching of gains of an amplifier for amplifying a photocurrent and the non-linearity caused by the saturation of the photoelectrically converting characteristic of the optical sensor and the exponential characteristics of the optical sensor and the amplifier can be corrected without employing a large-scale construction such as a bench. The non-linearity can be highly precisely and efficiently corrected in a measuring apparatus realized as a spectral luminometer or a spectral colorimeter without requiring a special facility.

The invention provides a special method for calibrating a standard colorimetric plate for a cotton colorimeter, comprising the following steps: irradiating a standard white plate with symmetric visible light source in the 45-degree angle direction; receiving and focusing reflected light and eliminating parasitic light; transmitting the reflected light signal; obtaining the reflected signal intensity of each wavelength of the standard colorimetric plate to be tested; and calibrating the reflectance of each wavelength of the standard colorimetric plate. The invention also provides a system for calibrating the standard colorimetric plate for the cotton colorimeter, comprising a microprocessor, a testing bench, a symmetric continuous spectrum visible light source, a first optical system; a second optical system, a monochromator, a photomultiplier tube, an amplifier and an analog / digital converter. The amplified electrical signal is sampled under the control of the microprocessor and is transmitted to the microprocessor. The testing condition is closer to the cotton color testing condition, is beneficial to controlling the cotton colorimeter calibration precision and is available to the more accurate test and calibration of the standard colorimetric plate of different area.

The invention relates to a camera-based method, device and system for detecting product color. The method comprises the following steps: obtaining a conversion relation formula related to RGB-Lab according to a standard color block; measuring an RGB value of a standard product, and obtaining a Lab value of the standard product according to the obtained conversion relation formula of the RGB-Lab; setting the acceptable upper and lower limits of the Lab value of the product according to the obtained Lab value of the standard product; measuring an RGB value of a to-be-measured product, so as to obtain the Lab value of the to-be-measured product according to the conversion relation formula of the RGB-Lab; and comparing the Lab value of the to-be-measured product with the acceptable upper and lower limits of the Lab value of the product, judging that the color of the to-be-measured product is qualified if the Lab value of the to-be-measured product is in the range of the acceptable upper and lower limits of the Lab value of the product, otherwise, judging that the color of the to-be-measured product is unqualified. Therefore, the product color can be efficiently, stably, quantitatively and automatically detected, the problems of arbitrariness of human eye detection and low colorimeter detection speed are solved, and the accuracy and the efficiency of the product color detection are greatly improved.

The grey fabric flaw detecting instrument is one optoelectronic testing instrument for detecting grey fabric quality. The optoelectronic testing instrument is developed based on the operation principle of photoelectric colorimeter. Photosensitive transistor is used for the grey fabric flaw detection, and when grey fabric is made to pass by, the flaw will cause the light flux difference and thus current change in photosensitive transistor and the change in converted voltage. Different kinds of flaw cause different change in light flux, holes cause light flux increase and overlapping, oil strain, etc cause light flux decrease and fluctuation, so that the present invention can recognize flaw type automatically. The present invention has simple structure, high efficiency, capacity of recording and other advantages.

An image forming apparatus includes: an image forming section; an image reading sensor and a colorimeter; a temperature sensor; a memory that stores a first color value and a second color value in a first color chart that has a larger number of patches than a second color chart; a processor that creates a scanner profile for converting a first color value into a second color value using color values obtained by the image reading sensor and the colorimeter, corrects the scanner profile according to the color values obtained by the image reading sensor and the colorimeter, and converts the first color value into the second color value using the corrected scanner profile.

The invention belongs to the technical field of food detection, and discloses a method for evaluating the browning degrees of Chinese chestnuts by using a colorimeter. The method comprises the following steps: (1) sample preparation, namely selecting more than two varieties of Chinese chestnuts, cutting the Chinese chestnuts by virtue of a sharp knife, and peeling off episperm and endopleura, so as to obtain a sample to be detected; (2) colorimeter determination, namely selecting a diffuse reflection D65 light source, determining the sample to be detected, and recording data Delta Eab, Delta L, Delta a and Delta b; and (3) analyzing the data Delta L, and evaluating different browning degrees of the Chinese chestnuts by using the Delta L. According to the method, the browning degrees of the Chinese chestnuts are detected by taking the precision colorimeter as a tool; the numerical values Delta L which reflect the browning degrees of the surfaces of the cooked Chinese chestnuts can be quickly read by using the colorimeter; not only can subjective evaluation be avoided, but also further oxidative browning, which is caused in a long-term grinding process, can be avoided, the time for evaluating the browning degrees of Chinese chestnut kernels can be significantly shortened by virtue of the colorimeter, and concrete data for evaluating the browning degrees can be quickly obtained.

A method for measuring chroma value by colorimeter to solve the drawbacks of conventional technologies, such as an inaccurate illuminant and the filter of color-matching function is difficult to be deposited and manufactured within an filter mod colorimeter, and an expensive spectrometer used within an spectrum mode calorimeter. The present invention does not need the spectrometer and the filter of color-matching function, and can measure an accurate chroma value of an object by using a multi-band illuminant illuminating the object and a power meter. Besides, the multi-band illuminant can be adjusted the illumination condition of standard illuminator under different color temperature, and measure the chroma value of the object under different color temperature. The accuracy of the measured chroma value is up to the level of the spectrum mode colorimeter, and the price is cheaper than the spectrum mode calorimeter.

An image reading apparatus capable of detecting correct color tones of an image printed on a sheet is described. The image reading apparatus includes a scanner 100, a colorimeter 103, a cooling device 145, a temperature control unit 111, and an image correction unit 113. While an image correction process is not performed, the temperature control unit 111 controls the cooling temperature to a first temperature for shifting the cooling device 145 to a predetermined cooled state. While the image correction process is performed, the temperature control unit 111 controls the cooling temperature to a second temperature for making the temperature of the sheet uniform. The image correction unit 113 obtains, while the temperature control unit 111 controls the cooling temperature to the second temperature, the correction amount of the image based on the colorimetric measurement result of the colorimeter 103 and the reading result of the scanner 100.

Provided is a method for automatically determining an error of a user operation or a calorimeter caused when the calorimeter is manually slid to measure the colors of color patches on a row-by-row basis. Also provided is a method capable of determining an error or a scanning direction using a feature value obtained from the calorimetric values without using fixed reference and threshold values for each patch.

The invention discloses a system and a method for detecting and rating the color fastness of a textile. The detecting and rating system comprises a computer system and a colorimeter, wherein the computer system is connected with the colorimeter; the computer system is used for completing blackboard correction and whiteboard correction of the colorimeter, reading detection data of the colorimeter,comparing the detection data with a preset standard rating range to obtain a rating level, and comparing the rating level with a preset product standard to obtain a qualified or unqualified judgment result; and the colorimeter is used for detecting the color fastness of the textile to obtain the detection data. The system and the method have the advantages that a test is simple, convenient and fast; a rating result is basically consistent with a manual visual rating result; and the product qualification judgment is intelligent.

When a grid point that is the object to be mapped is present in a first division region a color of which has lightness equal to or higher than the lightness at the maximum chroma point in the color gamut and has chroma higher than the chroma at that point, the intersection of a straight line connecting the grid point to the maximum chroma point and an achromatic axis is calculated and a point having lightness equal to or higher than the lightness of the intersection is set as the focal color. Then, the intersection of a straight line connecting the object grid point to the focal color and the boundary of color gamut is set as an output color for the grid point. The output colors are prevented from being separated into color on the high and on the low lightness sides with respect to the maximum chroma point.

The invention provides a color value correction control method, a color value correction control program and an image forming apparatus. The color value correction control method uses a printing system including: a printer that prints a chart, a scanner that acquires an RGB value and a colorimeter that acquires a color value. The method comprises the steps of: when estimating a color value using the RGB value obtained by measuring the chart and a scanner profile and calculating a correction amount of the color value based on the color value obtained by measuring the chart and the estimated color value, creating a specific chart having a first patch group for acquiring an RGB value and with a first size and a second patch group for acquiring a color value and with a second size, with the first patch group containing a specific patch with the same CYMK value as a CYMK value of each patch of the second patch group, estimating the color value by using an RGB value obtained by measuring thespecific patch in the first patch group and the scanner profile, and calculating the correction amount of the color value based on a color value obtained by measuring each patch of the second patch group and the estimated color value.

The invention provides a bubble flowing resistant colorimeter cell capable of simultaneously detecting absorbance and fluorescence, which belongs to optical elements for carrying out absorbance analysis and fluorescence analysis on liquid samples in the field of analysis instruments. The bubble flowing resistant colorimeter cell comprises a black base, a sample inlet tube, a light through hole passage, another light through hole passage and a sample outlet tube, wherein a cylindrical light through hole passage is arranged in the black base in a diagonal line direction; the other light through hole passage is arranged in a vertical direction of a central axis of the light through hole passage; the sample inlet tube and the sample outlet tube, which are used for a detected liquid to flow through, are arranged on the black base; the detected liquid flows in from the sample inlet tube, flows through end walls of the light through hole passage and the other light through hole passage and flows out from the sample outlet tube so as to form a Z-shaped liquid passage structure. According to the invention, as one light through hole passage vertical to the other light through hole passage is arranged, detections, such as absorbance detection, fluorescence wavelength detection, can be simultaneously carried out; as the light through hole passage and the other light through hole passage are blocked up, the sample cannot enter between the light through hole passage and the other light through hole passage; and through the adoption of the Z-shaped liquid passage, small bubbles in the sample can be gathered at the top, so that a measuring error is reduced.

A method for quickly determining various ecdysis periods of river crabs is characterized by comprising the following steps of first opening a colorimeter to automatically conduct black-white board correction via a white board, after the correction, conducting standard measurement, adjusting a reading mode into a Lab mode, in which L indicates color lightness,+ means inclination to white, - means inclination to darkness, a indicates color green-red value, + means inclination to red and - means inclination to green indicating blue-yellow value, + means inclination to yellow and - means inclination to blue, taking out of a crab individual, wiping off a crab head, chest and back parts, reading blue-yellow value (b) of crab head-chest exoskeleton via the colorimeter, and making the following determinations according to the blue-yellow value (b): when b is no less than 7, the individual is in a proecdysis; when b is no more than 2, the individual is in ecdysis; and when b is more than 2 and less than 7, the individual is during the ecdysis. The method is simple and convenient to operate; no detection damages are caused to the crabs; and foundations are provided for crab breeding and management level.

The invention discloses a mobile testing mechanism for a colorimeter. The mobile testing mechanism for the colorimeter comprises a conveying unit, a feeding unit, a vision positioning unit, a color detection unit and a blanking unit, wherein the conveying unit comprises a carrier and a movement device A; the feeding unit comprises a feeding gripper and a movement device B; the vision positioning unit comprises a vision positioning device for calculating the actual position of a product after taking pictures and images and a movement device C; the color detection unit comprises the color difference detection device and a movement device D that drives the color difference detection device to move in a third horizontal direction according to the actual position of the product; and the blanking unit comprises a blanking gripper and a movement device E. According to the invention, the mobile testing mechanism for the colorimeter replaces artificial eye inspection, improves product quality,and reduces artificial eye damage, a product can be detected in 0.7s, the product has no secondary damage, the detection rate can reach 99.8%, and the mobile testing mechanism can replace 3-4 workers.

The invention discloses a color difference analysis method which comprises the following steps: 1, constructing a color set with the number of colors not less than 20, the color set comprising 100% white, 100% red, 100% green, 100% blue, 100% cyan, 100% magenta and 100% yellow; 2, measuring color lumps displayed by a display to obtain CIEXYZ measured values; 3, converting the CIEXYZ measured values of seven colors in the CIEXYZ measured values in the step 2 to obtain CIEXYxy measured values, and taking an x component and a y component in the CIEXYxy measured values as chromaticity coordinatesof the seven colors in a CIEXy coordinate system; 4, converting all RGB color values in the color set into CIEXYZ reference values; 5, respectively converting the CIEXYZ measured values and the CIEXYZreference values into CIELab measured values and CIELab reference values; and 6, calculating the chromatic aberration between the CIELab measured values and the CIELab reference values. Meanwhile, the invention provides a display with a color difference analysis function. The color of the display can be visually and efficiently evaluated only by externally connecting a colorimeter, color difference calculation can be more accurate, and an evaluation result is more objective and real.

The invention belongs to the technical field of corrosion inspection, and particularly relates to an evaluation method for a surface rust layer after rapid rust formation of weathering resistant steel. The method comprises the following steps: accurately partitioning the surface of a weathering resistant steel sample by using a standard grating plate, carrying out microscopic analysis through Raman spectrum, confirming components of the rust layer and the ratio of the components, carrying out semi-quantitative analysis on the color of the rust layer through a colorimeter, and finding out the corresponding relation between the macroscopic color and the microscopic components of the rust layer on the surface of the weathering resistant steel. A set of method for macroscopically evaluating the performance of the rust layer can be established by contrastive analysis of the rust layers with different colors, the content range of each component in the rust layer can be determined only by measuring the chromatic aberration value of the rust layer, accurate support is provided for engineering use, and a colorimeter is convenient to carry to engineering application places and strong support is provided for later evaluation of the rusting condition of the weathering resistant steel on a construction site.

An image reading apparatus includes: a conveyor that conveys paper on which an image is formed along a conveyance path; a first guide member including a first opening on a reference surface opposed to the conveyance path that guides the conveyed paper; a first opposing member that arranges the image on the paper in a colorimetric range set in the first opening on the reference surface by pressing the reference surface via the paper to allow the paper to abut the reference surface; a second opposing member that presses the reference surface by a pressing surface including a calibrating member in a reference color to arrange the calibrating member in the colorimetric range; and a colorimeter arranged on a side opposite to the conveyance path across the first guide member that performs colorimetry on the image on the paper and the calibrating member arranged in the colorimetric range.

The invention discloses a rapid tea grade identification method based on color difference and ultraviolet spectrum, and belongs to the technical field of food detection. The method comprises the following steps: (1) brewing a tea sample to be detected to obtain tea soup, and respectively collecting color difference data and ultraviolet spectrum data of the tea soup by using a colorimeter and an ultraviolet spectrophotometer; and (2) respectively processing thecolor difference data and the ultraviolet spectrum data by utilizing principal component analysis, extracting characteristic data, inputting the characteristic data into a tea grade distinguishing model, and operating and outputting a grade label corresponding to a tea sample to be detected. The tea grade distinguishing model is constructed by adopting a random forest method. Contribution of tea soup color and internal quality to tea quality is utilized, and two groups of parameters of color difference and ultraviolet spectrum arecombined to identify the tea grade, so that the tea grade can be accurately judged.

The invention discloses a display screen brightness and chrominance consistency detection method, which comprises the following steps: obtaining a detection image of a to-be-detected display screen through a first filter, and respectively obtaining first response values of a plurality of pixel points on the detection image under the first filter; acquiring a detection image of the to-be-detected display screen through a second filter having a different transmittance curve from the first filter, and respectively obtaining second response values of the plurality of pixel points under the second filter; representing the central wavelength of the corresponding pixel point by a ratio of the first response value to the second response value to obtain a central wavelength difference between different pixel points; and judging the chromaticity consistency of each pixel point on the to-be-detected display screen according to the central wavelength difference. The spectrum deviation of a measured light source can be directly judged, then the chromaticity and brightness uniformity of the measured light source can be judged, the necessary calibration process of an imaging colorimeter or an imaging brightness meter is avoided, and the problem that a probe type color analyzer limits the measurement space and the measurement distance is solved.

This colorimeter is provided with: a light guide portion which introduces measuring light; a light-receiving sensor which has a pixel region including a plurality of pixels, and which outputs light-reception signals from the plurality of pixels when the measuring light is incident thereon; a plurality of filters which are disposed between the light guide portion and the light-receiving sensor, andeach of which faces one of a mutually different plurality of partial pixel regions, each of which is a part of the pixel region, each filter having a different spectral transmittance characteristic;a storage portion which stores pixel positions of pixel groups to be used for computation, from among the pixels included in each of the plurality of partial pixel regions; and a computation control portion which calculates an index related to color using the light-reception signals output from each pixel group. The pixel position of each pixel group is obtained in advance on the basis of a positional relationship between each of the plurality of filters and the light-receiving sensor.

The invention provides a preparation method of poly (aryl ether ketone) and the poly (aryl ether ketone), and belongs to the technical field of high polymer materials. The method comprises the following steps: uniformly mixing a benzophenone compound or a diacyl chloride compound, a hydroxyl-containing compound and sodium borohydride under the action of a first solvent, heating to 80-150 DEG C, and removing the first solvent to obtain a premix; and taking the obtained premix as a reaction substrate, sequentially adding a second solvent and carbonate at 150-160 DEG C, and gradually heating for reaction to obtain the poly (aryl ether ketone). The grade of the poly (aryl ether ketone) color product obtained by the method is improved, after the poly (aryl ether ketone) product is injected into a standard test sample plate, a colorimeter is used for carrying out chromaticity test, the measured lightness index L * is subjected to sample color lightness comparison, and the poly (aryl ether ketone) has the characteristic that the lightness index L * is greater than or equal to 70.

A water testing system having a water sample container that is adapted to retain a water sample, a color indicator container that is adapted to dispense a color indicator which is adapted change the color of the water sample when the water sample contains DTC, and a colorimeter that is adapted to automatically determine a blank value and the concentration of sodium dimethyldithiocarbamate in the water sample. A method for determining the concentration of DTC in a water sample comprising providing a water testing system, placing the water sample in the water sample container, placing the water sample container in the colorimeter, automatically determining a blank value, adding the color indicator to the water sample, placing the water sample container in the colorimeter, and automatically determining the concentration of DTC in the water sample.

The invention provides a colorimeter matching method, a colorimeter and a colorimeter correction method and system, and the colorimeter matching method comprises the steps: obtaining a light passing core diameter of an optical fiber input end, determining the opening angle of the optical fiber input end based on the light passing core diameter of the optical fiber input end, and determining a field angle of a lens based on the opening angle of the optical fiber input end; controlling target light emitted by a to-be-measured area to enter the lens at a field angle and then enter the input end of the optical fiber at a flare angle, so that the target light is emitted from the output end of the optical fiber; and controlling the target light emitted from the output end of the optical fiber toenter the spectrograph, and matching the end face contour of the output end of the optical fiber with the slit contour of the receiving end of the spectrograph. According to the invention, the problem of low measurement efficiency caused by poor light receiving capability of a colorimeter in the prior art is solved.