CN116337233A - Inclined filter type chromaticity measuring device and method integrating spectrum measurement - Google Patents
Inclined filter type chromaticity measuring device and method integrating spectrum measurement Download PDFInfo
- Publication number
- CN116337233A CN116337233A CN202310209384.7A CN202310209384A CN116337233A CN 116337233 A CN116337233 A CN 116337233A CN 202310209384 A CN202310209384 A CN 202310209384A CN 116337233 A CN116337233 A CN 116337233A
- Authority
- CN
- China
- Prior art keywords
- theoretical
- measurement
- primary color
- center
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 131
- 238000001228 spectrum Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title description 23
- 238000003384 imaging method Methods 0.000 claims abstract description 54
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 230000021615 conjugation Effects 0.000 claims abstract description 3
- 238000000691 measurement method Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 5
- 238000000985 reflectance spectrum Methods 0.000 claims description 4
- 230000003595 spectral effect Effects 0.000 abstract description 21
- 239000000523 sample Substances 0.000 description 30
- 239000003086 colorant Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000001748 luminescence spectrum Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000000774 X-filter Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0262—Constructional arrangements for removing stray light
Abstract
The invention discloses an inclined filter type chromaticity measuring device integrating spectrum measurement, which comprises an imaging part, theoretical three primary color filters, a spectrometer and a converging lens. The mirror surface of the theoretical three primary color filter is arranged in non-parallel with the imaging surface of the imaging part. The imaging part and the spectrometer are arranged in optical symmetry and conjugation relative to the mirror surfaces of the theoretical three primary color filters. After the light source from the sample to be detected is converged by the converging lens, the light source can penetrate through the theoretical three primary color filter and can be imaged in the imaging part; and can be simultaneously reflected to a spectrometer via a theoretical trichromatic filter for spectral measurement. Compared with the prior art, the chromaticity measuring device omits a beam splitter, and the theoretical three-primary color filter is utilized to directly reflect light to the spectrometer for measurement through the non-parallel arrangement of the theoretical three-primary color filter and the imaging part and the optical symmetry conjugate arrangement of the spectrometer, so that the stray light problem caused by reflected light in the vertical incidence and the independent spectrum measurement are avoided, and the measurement precision and the measurement efficiency are improved.
Description
Technical Field
The invention relates to the technical field of industrial imaging detection, in particular to an inclined filter type chromaticity measuring device and method for integrated spectrum measurement.
Background
With the development of technology, the characteristic evaluation of display panels or illuminants is increasingly important for the development of products. Common light emitters and their display products include LED, microLED, miniLED and LD, which are different types of products including consumer electronics (e.g., cell phone screens, television displays, etc.).
For these display products, the evaluation of their luminescence properties is particularly important for the quality evaluation of their products, while colorimetric measurements are one of the most important. The chromaticity value or the brightness value of the display product can be obtained through the imaging colorimeter, so that the uniformity of the display chromaticity, mura characteristics and the like can be evaluated; imaging colorimeters are currently based on basically two structures, one being a filter colorimeter and the other being a filter colorimeter integrating spectral measurements.
By providing a filter wheel in front of the light sensor, a different filter, typically a filter conforming to or approaching the CIE1931 response curve, is added to the filter wheel. In the general working mode, the optical sensor collects an image under the X filter wheel, collects another image under the Y filter wheel and collects another image under the Z filter wheel. And then calibrating and calculating the three XYZ images to obtain the real XYZ values.
If the central point measurement of the spectrometer is integrated, light is reflected to the spectrometer through a beam splitter arranged in front of the filter wheel, the spectrometer collects primary light and obtains measurement data, and then calibration calculation is carried out according to the data result measured by the spectrometer, so that the XYZ data value of a full picture is obtained.
As shown in fig. 1, the conventional filter type colorimetric measurement scheme for integrated spectral measurement is characterized in that the XYZ filter is parallel to the imaging chip, and the filter is generally an interference type filter, which is capable of transmitting light with a specific spectrum (herein, X/Y/Z), and for the light which is not transmitted, all the light is reflected back into the converging lens, a part of the light forms stray light inside the converging lens and finally irradiates the imaging chip, and the other part of the light reflects onto the surface of the sample to be measured, and then the light is imaged onto the imaging chip through the converging lens, and the light together with the light emitted by the sample to be measured is received by the imaging chip, thereby causing a certain measurement error.
Furthermore, the spectroscopic measurement procedure is independent of the XYZ measurement procedure. In general, there is a certain fluctuation in the brightness of the sample to be measured, which results in that the product is not in the same state at all but in the fluctuation in brightness at the time of XYZ chromaticity measurement and spectrometer measurement. Therefore, the resulting XYZ chromaticity values are deviated to some extent. Moreover, one round of measurement requires four operations, namely X-filter imaging, Y-filter imaging, Z-filter imaging, and spectrometer measurement, which takes a long time.
Disclosure of Invention
Aiming at least one defect or improvement requirement in the prior art mentioned in the background art part, the invention provides an inclined filter type colorimetric measurement device and a measurement method for integrated spectral measurement, which are used for solving the technical problems of lower colorimetric measurement precision and longer measurement time consumption caused by multiple stray light and independent spectral measurement flow.
To achieve the above object, in a first aspect, the present invention provides a tilting filter-type colorimetric measurement device for integrated spectral measurement, including: the device comprises an imaging part, a theoretical three primary color filter, a spectrometer and a converging lens;
the mirror surface of the theoretical three-primary-color filter is arranged in non-parallel with the imaging surface of the imaging part;
the imaging part and the spectrometer are arranged in optical symmetry and conjugation relative to the mirror surface of the theoretical three primary color filter;
after the light source of the sample to be detected from the outside is converged by the converging lens, the light source can penetrate through the theoretical three primary color filters and can be imaged at the imaging part; and the light source can be reflected to the spectrometer to measure the spectrum through the theoretical trichromatic filter at the same time after being converged by the converging lens.
In order to achieve the above object, in a second aspect, the present invention provides a colorimetric measurement method based on the above colorimetric measurement device, including:
respectively and simultaneously measuring and obtaining a center point chromaticity value and a center point spectrum value of the sample to be measured in a corresponding measurement mode in a measurement mode of each theoretical primary color filter of the theoretical primary color filters;
randomly selecting a measurement result of one of the theoretical primary color filters in a measurement mode, and respectively performing calibration processing on the central point chromaticity values of the three theoretical primary color filters in the measurement mode to obtain central point calibration chromaticity values of the three theoretical primary color filters in the measurement mode;
and acquiring a calibration coefficient based on the central point calibration colorimetric value, and expanding and applying the calibration coefficient in the full-image of the sample to be measured to obtain a full-picture calibration colorimetric value after calibration.
Further, the formula for arbitrarily selecting the measurement result in the measurement mode of one of the theoretical primary color filters, and performing calibration processing on the chromaticity values of the center points in the measurement modes of the three theoretical primary color filters to obtain the calibration chromaticity values of the center points in the measurement modes of the three theoretical primary color filters, respectively, specifically includes:
X center ’= X center * f 2 （λ）/f 1 （λ）；
Z center ’= Z center * f 2 （λ）/f 3 （λ）；
Y center ’= Y center ；
wherein, represents the multiplication; y is Y center 、X center And Z center Respectively representing the center point chromaticity values of the sample to be measured in the measurement mode of one selected theoretical primary color filter and the other two theoretical primary color filters; f (f) 2 （λ）、f 1 (lambda) and f 3 (lambda) represents the central point spectrum value of the sample to be measured in the measurement mode of one selected theoretical primary color filter and the other two theoretical primary color filters respectively; y is Y center ’ 、X center ' and Z center ' represents the center point calibration chromaticity values in the measurement mode of the selected one and the other two theoretical primary filters, respectively.
Further, regarding f 1 （λ）、f 2 (lambda) and f 3 The formula of (λ) specifically includes:
f 1 （λ）= f X (λ)/(1－X(λ))；
f 2 （λ） = f Y (λ)/(1－Y(λ))；
f 3 （λ） = f Z (λ)/(1－Z(λ))；
wherein f X (λ)、f Y (lambda) and f Z (lambda) respectively represents the reflected light spectrums measured by the spectrometer in the measuring mode corresponding to the theoretical primary color filters; 1-X (lambda), 1-Y (lambda) and 1-Z (lambda) respectively represent reflectance spectra measured in the measurement mode corresponding to the theoretical primary filters.
To achieve the above object, in a third aspect, the present invention provides a tilting filter-type colorimetric measurement device for integrated spectral measurement, including: the device comprises an imaging part, a theoretical three primary color filter, a spectrometer, a beam splitter and a converging lens;
the mirror surface of the theoretical three-primary-color filter is arranged in non-parallel with the imaging surface of the imaging part;
after the light source of the sample to be detected from the outside is converged by the converging lens, the light source can penetrate through the theoretical three primary color filters and can be imaged at the imaging part; and after the light source is converged by the converging lens, the light source can be reflected to the spectrometer by the beam splitter to measure the spectrum.
In order to achieve the above object, according to a fourth aspect, the present invention provides a colorimetric measurement method based on the above colorimetric measurement device, including:
under the measurement mode of each theoretical primary color filter of the theoretical primary color filters, respectively acquiring all images of the sample to be measured under the corresponding measurement mode, and performing calibration calculation on the three all images to acquire the full-picture chromaticity value of the sample to be measured;
after the steps, the light reflected by the beam splitter is collected and measured, and calibration calculation is carried out by using the measurement data of the spectrometer to obtain a corresponding spectrum measurement result.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
(1) Compared with the prior art, the chromaticity measuring device omits a beam splitter, and the theoretical three-primary color filter is utilized to directly reflect light to the spectrometer for measurement through the non-parallel arrangement of the theoretical three-primary color filter and the imaging part and the optical symmetrical conjugate arrangement of the spectrometer and the imaging part relative to the mirror surface of the theoretical three-primary color filter, so that the problem of stray light caused by reflected light in the vertical incidence is avoided, and the measuring precision is improved. Compared with the X filter imaging, Y filter imaging, Z filter imaging and spectrometer measurement in the prior art, the method integrates the spectrum measurement into XYZ three-time measurement, so that the measurement time is shortened and the measurement efficiency is improved compared with the original method.
(2) According to the invention, through randomly selecting the measurement result of one of the theoretical primary color filters in the measurement mode, the center point chromaticity values of the three theoretical primary color filters in the measurement mode are respectively calibrated, so that the measurement error caused by inconsistent states of the sample to be measured in different filter measurement modes is overcome, and the measurement accuracy is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the light path and structure of a filter-type colorimetric measurement device integrated with a stand-alone spectral measurement process according to the prior art;
fig. 2 is a schematic diagram of an optical path and a structure of a filter-type colorimetric measurement device integrated with a combined spectral measurement flow according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The terms first, second, third and the like in the description, in the claims, or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" or "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed or inherent to such process, method, article, or apparatus but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.
According to the three primary color theory of poplar-helmholtz, the perception of color is due to the combined result of the three primary color light stimuli. In the red, green and blue three primary color systems, the stimulus amounts of red, green and blue are indicated by R, G, B, respectively. Since it is impossible to match all colors existing in nature with red, green and blue light selected from the actual spectrum, and a "standard chromaticity observer" is inconvenient to calculate and difficult to understand when used for calibrating spectral colors, three primary colors which are not existing in nature, namely, theoretical three primary colors, are theoretically assumed by CIE in 1931, and all colors are matched in theory, so that an XYZ color measuring system is formed. The theoretical X primary corresponds to red and violet with higher saturation than spectral red, the theoretical Y primary corresponds to green with higher saturation than spectral green at 520 nm, and the theoretical Z primary corresponds to blue with higher saturation than spectral blue at 477 nm. The stimulus amounts of these three theoretical primary colors are expressed as X, Y, Z, so-called tristimulus values or chromaticity values.
In view of the technical problems of the prior art mentioned in the background section that the filter-type colorimetric measurement device or measurement method integrated with the independent spectral measurement procedure has low colorimetric measurement accuracy and long measurement time due to multiple stray light and independent spectral measurement procedure, as shown in fig. 2, embodiment 1 provides a filter-type colorimetric measurement device integrated with the combined spectral measurement procedure, which is different from the conventional XYZ filter (theoretical three primary color filter), wherein the XYZ filter is inclined at a certain angle with the imaging plane of the imaging chip in the filter wheel. For convenience of industrial design of the product, the inclination is preferably 45 degrees, and the product is exemplified and naturally not limited to the 45 degrees inclination. Because the response curve of the filter changes with the change of the incident angle, the filter is different from the prior transmittance spectrum of the normal incident light. Here, the filter should be designed to take into account that the transmittance line of the incident light rays having an angle of 45 ° conforms to the response curve of CIE1931, instead of having an angle of 0 °.
A spectrometer receiving probe, which can be an optical fiber in general, is arranged on the reflection conjugate plane; the optical fiber is optically conjugate symmetric to the imaging surface of the area camera at a position away from the mirror surface of the XYZ filter.
After the light source of the sample to be detected from the outside is converged by the converging lens, the light source can penetrate through the theoretical three primary color filter and can be imaged in the imaging part; after the light source is converged by the converging lens, the light source can be reflected to the spectrometer by the theoretical trichromatic filter to measure the spectrum.
The colorimetric measurement method of the filter colorimetric measurement device integrated with the combined spectral measurement procedure provided based on the above embodiment 1 mainly includes the following steps:
and step 1, respectively and simultaneously measuring and obtaining a center point chromaticity value and a center point spectrum value of the sample to be measured in a corresponding measurement mode in the measurement mode of each theoretical primary color filter of the theoretical primary color filters.
More specifically, the reflectance spectrum of an actual XYZ filter at 45 ° of incident light was measured. It can be seen that when the transmittance spectra of XYZ filters are X (λ), Y (λ) and Z (λ), the reflectance spectra of the three filters are R respectively X = 1－X（λ），R Y =1-Y (λ) and R Z = 1－Z（λ）。
Theoretically, it is assumed that the spectrum of the reflected light received by the spectrometer under the X filter (the virtual first primary filter or the theoretical first primary filter) is f X (λ), then the actual luminescence spectrum of the sample to be measured is f (λ) =f X (λ)/(1－X(λ))。
Similarly, when the sample is in the measurement mode of the Y filter (virtual second primary filter or theoretical second primary filter) and the Z filter (virtual third primary filter or theoretical third primary filter), the luminescence spectrum of the actual sample to be measured can be deduced to be f (λ) =f Y (λ)/(1－Y(λ))，f（λ）= f Z (λ)/(1－Z(λ))。
In actual operation, firstly, the image of the sample to be measured is measured under the X filter to obtain the image of the sample to be measured collected by the optical sensor under the X filter, and the chromaticity value measured by the central point is expressed as X center The method comprises the steps of carrying out a first treatment on the surface of the At the same time, the spectrum value of the center point corresponding to the sample to be measured, which is measured by the spectrometer, is f 1 （λ）= f X (lambda)/(1-X (lambda)). Similarly, the chromaticity value measured by the center point obtained by measurement under the Y filter is expressed as Y center And the spectrum value of the corresponding center point of the sample to be measured by the spectrometer at the moment is f 2 （λ） = f Y (lambda)/(1-Y (lambda)). Similarly, measured under a Z filter to obtain Z center And f 3 （λ） = f Z (λ)/(1－Z(λ))。
And step 2, randomly selecting measurement results of one of the theoretical primary color filters in the measurement mode, and respectively performing calibration processing on the central point colorimetric values of the three theoretical primary color filters in the measurement mode to obtain central point calibration colorimetric values of the three theoretical primary color filters in the measurement mode.
More specifically, due to f 1 （λ）、f 2 (lambda) and f 3 (lambda) is the spectrum or spectral value of the center point of the sample to be measured at three different times, which corresponds to the X measured in three states of the sample to be measured center ,Y center And Z center Values. At this time, one calibration process may be performed for three states. By measuring results in X-or Y-or Z-filtersIs all right. The embodiment is based on the brightness of the Y filter during measurement, and the calibrated X center ’ = X center * f 2 （λ）/f 1 （λ）；Z center ’ = Z center * f 2 （λ）/f 3 (lambda); represents the multiplier number; y is Y center ’ = Y center . That is, after considering the instability of brightness or chromaticity of the product at different moments, the chromaticity value of the center point after calibration measured by the XYZ filter is X center ’,Y center ' and Z center ’。
And step 3, acquiring a calibration coefficient based on the central point calibration colorimetric value, and expanding and applying the calibration coefficient in the full-image of the sample to be measured to obtain the calibrated full-picture calibration colorimetric value.
More specifically, in step 2, the XYZ chromaticity value of the center point is corrected by the spectral value measured by the center point. And applying the corresponding calibration coefficient to the XYZ full image to obtain the X ', Y ' and Z ' chromaticity values of the full picture of the sample to be measured after calibration.
At this time, the X ' Y ' Z ' chromaticity value and the central point spectrum value of the whole picture can be obtained, thereby completing the whole measurement process.
Compared with the prior art, the chromaticity measuring device omits a beam splitter, and through the non-parallel arrangement of the theoretical three primary color filter and the imaging part and the optical symmetrical conjugate arrangement of the spectrometer and the imaging part relative to the mirror surface of the theoretical three primary color filter, the light is directly reflected to the spectrometer by the emitting surface of the theoretical three primary color filter for measurement, so that the problem of much stray light caused by reflected light during normal incidence is avoided, and the measurement precision is improved. Compared with the X filter imaging, Y filter imaging, Z filter imaging and spectrometer measurement in the prior art, the embodiment integrates the spectrum measurement into XYZ three-time measurement, so that the measurement time is shortened and the measurement efficiency is improved compared with the original measurement. According to the embodiment, the measurement results of one of the theoretical primary color filters in the measurement mode are selected at will, and the center point chromaticity values of the three theoretical primary color filters in the measurement mode are calibrated respectively, so that measurement errors caused by inconsistent states of the sample to be measured in different filter measurement modes are overcome, and the measurement accuracy is further improved.
In embodiment 2, the present application provides a filter-type colorimetric measurement device integrated with a stand-alone spectral measurement procedure, which mainly includes: the device comprises an imaging part, a theoretical three primary color filter, a spectrometer, a beam splitter and a converging lens.
After the light source of the sample to be detected from the outside is converged by the converging lens, the light source can penetrate through the theoretical three primary color filter and can be imaged in the imaging part; and after the light source is converged by the converging lens, the light source can be reflected to the spectrometer by the beam splitter to measure the spectrum.
The only difference from the prior art is that the mirror surface of the theoretical trichromatic filter and the imaging surface of the imaging part are arranged in a non-parallel way. In fig. 1, the original XYZ filter parallel to the imaging chip is adjusted to have a lower angle, so that the XYZ filter and the imaging chip are obliquely and non-parallel, thereby avoiding the problem of stray light caused by reflected light in normal incidence and improving the measurement accuracy to a certain extent.
A colorimetric measurement method for a filter colorimetric measurement device integrated with a stand-alone spectral measurement procedure provided based on the above embodiment 2 mainly includes the following steps:
and respectively acquiring all images of the sample to be measured in the corresponding measurement mode in the measurement mode of each theoretical primary filter of the three primary filters, and performing calibration calculation on the three all images to acquire the full-picture chromaticity value of the sample to be measured.
After the above steps, the spectrometer re-collects and measures the light reflected by the beam splitter, and performs calibration calculation according to the measurement data of the spectrometer to further obtain a corresponding spectrum measurement result.
The foregoing is merely exemplary embodiments of the present disclosure and is not intended to limit the scope of the present disclosure. That is, equivalent changes and modifications are contemplated by the teachings of this disclosure, which fall within the scope of the present disclosure. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a scope and spirit of the disclosure being indicated by the claims.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. An inclined filter-type chromaticity measuring device integrating spectrum measurement, comprising: the device comprises an imaging part, a theoretical three primary color filter, a spectrometer and a converging lens;
the mirror surface of the theoretical three-primary-color filter is arranged in non-parallel with the imaging surface of the imaging part;
the imaging part and the spectrometer are arranged in optical symmetry and conjugation relative to the mirror surface of the theoretical three primary color filter;
after the light source of the sample to be detected from the outside is converged by the converging lens, the light source can penetrate through the theoretical three primary color filters and can be imaged at the imaging part; and the light source can be reflected to the spectrometer to measure the spectrum through the theoretical trichromatic filter at the same time after being converged by the converging lens.
2. A colorimetric measurement method based on the colorimetric measurement device according to claim 1, characterized by comprising:
respectively and simultaneously measuring and obtaining a center point chromaticity value and a center point spectrum value of the sample to be measured in a corresponding measurement mode in a measurement mode of each theoretical primary color filter of the theoretical primary color filters;
randomly selecting a measurement result of one of the theoretical primary color filters in a measurement mode, and respectively performing calibration processing on the central point chromaticity values of the three theoretical primary color filters in the measurement mode to obtain central point calibration chromaticity values of the three theoretical primary color filters in the measurement mode;
and acquiring a calibration coefficient based on the central point calibration colorimetric value, and expanding and applying the calibration coefficient in the full-image of the sample to be measured to obtain a full-picture calibration colorimetric value after calibration.
3. The chromaticity measurement method as recited in claim 2, wherein the formula for arbitrarily selecting the measurement result in the measurement mode of one of the theoretical primary color filters, and performing calibration processing on the chromaticity values of the center points in the measurement modes of the three theoretical primary color filters, respectively, to obtain the calibrated chromaticity values of the center points in the measurement modes of the three theoretical primary color filters, respectively, specifically comprises:
X center ’= X center * f 2 （λ）/f 1 （λ）；
Z center ’= Z center * f 2 （λ）/f 3 （λ）；
Y center ’= Y center ；
wherein, represents the multiplication; y is Y center 、X center And Z center Respectively representing the center point chromaticity values of the sample to be measured in the measurement mode of one selected theoretical primary color filter and the other two theoretical primary color filters; f (f) 2 （λ）、f 1 (lambda) and f 3 (lambda) represents the central point spectrum value of the sample to be measured in the measurement mode of one selected theoretical primary color filter and the other two theoretical primary color filters respectively; y is Y center ’ 、X center ' and Z center ' represents center point calibration in measurement mode of one and the other two theoretical primary filters, respectivelyChromaticity values.
4. A colorimetric measurement method as claimed in claim 3, characterized in that in relation to f 1 （λ）、f 2 (lambda) and f 3 The formula of (λ) specifically includes:
f 1 （λ）= f X (λ)/(1－X(λ))；
f 2 （λ） = f Y (λ)/(1－Y(λ))；
f 3 （λ） = f Z (λ)/(1－Z(λ))；
wherein f X (λ)、f Y (lambda) and f Z (lambda) respectively represents the reflected light spectrums measured by the spectrometer in the measuring mode corresponding to the theoretical primary color filters; 1-X (lambda), 1-Y (lambda) and 1-Z (lambda) respectively represent reflectance spectra measured in the measurement mode corresponding to the theoretical primary filters.
5. An inclined filter-type chromaticity measuring device integrating spectrum measurement, comprising: the device comprises an imaging part, a theoretical three primary color filter, a spectrometer, a beam splitter and a converging lens;
the mirror surface of the theoretical three-primary-color filter is arranged in non-parallel with the imaging surface of the imaging part;
after the light source of the sample to be detected from the outside is converged by the converging lens, the light source can penetrate through the theoretical three primary color filters and can be imaged at the imaging part; and after the light source is converged by the converging lens, the light source can be reflected to the spectrometer by the beam splitter to measure the spectrum.
6. A colorimetric measurement method based on the colorimetric measurement device according to claim 5, characterized by comprising:
under the measurement mode of each theoretical primary color filter of the theoretical primary color filters, respectively acquiring all images of the sample to be measured under the corresponding measurement mode, and performing calibration calculation on the three all images to acquire the full-picture chromaticity value of the sample to be measured;
after the steps, the light reflected by the beam splitter is collected and measured, and calibration calculation is carried out by using the measurement data of the spectrometer to obtain a corresponding spectrum measurement result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310209384.7A CN116337233A (en) | 2023-03-07 | 2023-03-07 | Inclined filter type chromaticity measuring device and method integrating spectrum measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310209384.7A CN116337233A (en) | 2023-03-07 | 2023-03-07 | Inclined filter type chromaticity measuring device and method integrating spectrum measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116337233A true CN116337233A (en) | 2023-06-27 |
Family
ID=86884998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310209384.7A Pending CN116337233A (en) | 2023-03-07 | 2023-03-07 | Inclined filter type chromaticity measuring device and method integrating spectrum measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116337233A (en) |
-
2023
- 2023-03-07 CN CN202310209384.7A patent/CN116337233A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6676398B2 (en) | Colorimetric system for display inspection | |
| TWI495857B (en) | High accuracy imaging colorimeter by special designed pattern closed-loop calibration assisted by spectrograph | |
| CN104390703B (en) | For the method determining the calibration parameter of spectrometer | |
| EP2988112A1 (en) | Specimen measuring device and computer program product | |
| US9076363B2 (en) | Parallel sensing configuration covers spectrum and colorimetric quantities with spatial resolution | |
| JP2013238576A (en) | Gonio-photometric spectral imaging measurement method and apparatus for the same | |
| CN104501960A (en) | LED (Light Emitting Diode) light source based light-splitting color measuring instrument and realization method thereof | |
| JP4710393B2 (en) | Excitation spectrum correction method in fluorescence spectrophotometer | |
| CN116337233A (en) | Inclined filter type chromaticity measuring device and method integrating spectrum measurement | |
| JP2016194449A (en) | Coloring checkup device, and coloring checkup method | |
| WO2018012478A1 (en) | Colorimeter | |
| JP6502195B2 (en) | Measuring device and measuring method | |
| JP7286014B2 (en) | High-sensitivity non-contact chromaticity measuring device | |
| CN106885630A (en) | A kind of method and device that spectral measurement is carried out based on color | |
| JP2002323376A (en) | Color information measuring method, display color evaluation method, display color adjusting method, and manufacturing method of device using them and projector | |
| RU2366907C1 (en) | Method for digital photoelectric colorimetry | |
| CN116878660A (en) | Chromaticity measuring device and method | |
| Fiorentin et al. | A multispectral imaging device for monitoring of colour in art works | |
| CN117848981A (en) | Multispectral imaging integrated system, device and use method thereof | |
| CN116678499A (en) | Colorimeter and spectroscopic measurement method | |
| Muray et al. | Tristimulus Colorimetry for Video Display Units | |
| JP2016059054A (en) | Image color distribution inspection device and image color distribution inspection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |