CN103616076A - Color calibration device covering complete color gamut - Google Patents
Color calibration device covering complete color gamut Download PDFInfo
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- CN103616076A CN103616076A CN201310603213.9A CN201310603213A CN103616076A CN 103616076 A CN103616076 A CN 103616076A CN 201310603213 A CN201310603213 A CN 201310603213A CN 103616076 A CN103616076 A CN 103616076A
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Abstract
The invention provides a color calibration device covering a complete color gamut. The color calibration device comprises a monochromator, a light-guide fiber, an integrating sphere, a luminosity probe, a luminosity indicating gauge and a color analyzer. The color calibration device can generate a calibration light source covering the complete color gamut to realize calibration of colorimetric parameters of the color analyzer and other instruments, has the advantages of being wide in color gamut coverage, stable in performance, high in accuracy and the like, can be used as a color measurement standard, and effectively solves the problems during color calibration in a wide color gamut.
Description
Technical field
The invention belongs to color calibration field, relate in particular to a kind of color calibration device that covers complete colour gamut.
Background technology
Development along with color science, the testing and calibration of color has shown its importance in increasing place, such as in fields such as display device, ambient lighting, textile printing and fine arts art, accurate generation and the measuring technique demand of particular color are very urgent.In order to measure the characteristic attribute of color, shades of colour surveying instrument produces thereupon, such as color analyzer, spectrophotometer, spectral radiometer and colour examining colour-difference-metre etc.And along with the development of technology, use current methods cannot meet the measurement demand of the various maximum conditions of continuous generation, the example that develops into that shows field with colour, reaching its maturity of laser display technology, by the synthetic combination of three primary colors laser, realizing color video shows, have high color domain coverage ratio, primary color saturation degree approaches 100%.When these instrument and equipments are carried out to measurement and calibration, most important being to locate a kind ofly can be created in complete colour gamut and can regulate continuously chromaticity coordinates and reliable and stable light source.
At present, the light source of large gamut range is all to utilize standard sources to coordinate optical filter to carry out matched combined, thereby realize, in chromaticity diagram adjusted, goes out larger colour gamut area coverage.Different according to combined method, the optical filter kind of using has narrow band pass filter, primary filter, polarizing filter etc., and the schematic diagram of implementation method as shown in Figure 1.
Filter set cooperation is the key position of above-mentioned implementation method, has following two kinds of common schemes: a kind of is to adopt several pieces narrow band pass filters to be used in combination.Due to the bandwidth of the narrow band pass filter magnitude in several nanometers, the monochromaticity of output light can be guaranteed, and saturation degree approaches 100%, and chromaticity coordinates can reach the border of color space substantially.Utilize multi-disc narrow band pass filter, can sketch the contours of the color space that approaches complete colour gamut along gamut boundary, realize the light output of large gamut range, see Fig. 2.Another kind is to adopt primary filter and complementary color optical filter, regulates the tristimulus values of light source by controlling the logical light ratio example of different optical filters, reaches the object that regulates colour mixture.The light source chromaticity diagram that primary colours, complementary color optical filter are realized as shown in Figure 3.
But all there is various shortcomings or deficiency in prior art:
The color measurement method that display manufacturer is used at home at present can not guarantee the accuracy of measured value, because color analyzer itself does not carry out direct magnitude tracing to color, only, to indivedual points, as the chromaticity coordinates of A light source, calibrate, cannot adapt to the calibration requirements of measuring color.
The continuous ager of large gamut range that some colleges and universities is studied now, owing to having adopted many groups integrating sphere light source and color filter, and by regulating the ratio of luminous flux to reach the large gamut range of output light, cause the chromaticity coordinates of light source output light to introduce a large amount of uncertainties, and repeated, less stable, cannot use as measurement standard.
Some research institutions are in order to pursue monochromaticity and the saturation degree of light source, adopt laser instrument as monochromatic source, laser has the advantages such as stability, monochromaticity is good, but because all kinds of laser instrument output wave bands are subject to the effects limit such as principle of luminosity, and cost is higher, be not suitable in colour gamut calibration field widespread adoption.
Reproduction cost and the difficulty of standard illuminants and specific illumination/observation condition are higher, and the measuring system stability and the traceability that form be there are certain requirements, and uncertain factor is more; Standard color card on sample size, have certain restriction, can only form the set of color gamut space top minute chromaticity coordinate points, and cannot realize continually varying color is calibrated and measured in theory; Standard sources coordinates the additive colo(u)r system complex structure of optical filter, and the blending ratio of color needs calibration equally, has brought more influence factor; The saturation degree of standard color card and optical filter, has limited the gamut range that the color that produces can cover on chromaticity space to a great extent, cannot realize the generation of complete colour gamut.
Summary of the invention
For addressing the above problem, the invention provides a kind of color calibration device that covers complete colour gamut, this calibrating installation comprises: monochromator, light transmitting fiber, integrating sphere, luminosity probe, luminosity indicating gauge, color analyzer.Colorific adjustment device of the present invention can produce the regulation light source that covers complete colour gamut, realizes the calibration to analogous instrument photometric parameters such as color analyzers.There is colour gamut wide coverage, stable performance, accuracy advantages of higher, can be used as color measurement standard and uses, the problem having run into while effectively having solved wide colour gamut color calibration.
A kind of color calibration device that covers complete colour gamut of the present invention comprises:
Monochromator, realizes the broad spectrum light source of Halogen lamp LED output is exported to monochromatic light after grating beam splitting, utilizes a plurality of monochromators to export the monochromatic light of a plurality of different wave lengths, can be created in any chromaticity coordinates point on chromaticity diagram after colour mixture;
Light transmitting fiber, realizes and monochromator to be exported to monochromatic source is coupled in fibre-optic front end, through fiber optic transmission, to the other end, is injected into and in integrating sphere, carries out colour mixture;
Integrating sphere, for the monochromatic light of different wave length is carried out to colour mixture, mixed complex light is exported by integrating sphere light-emitting window, realizes the regulation light source output that covers complete gamut range;
Luminosity probe, for monitoring monochromatic light in the colour mixture result of integrating sphere, realizes the output of different monochromators is carried out to feedback regulation, for regulation light source provides indicating value output;
Color analyzer, for receiving the output light source after integrating sphere colour mixture, and measures the parameters such as chromaticity coordinates of described complex light, realizes the calibration to its color measuring result.
Further, the minimum 0.5nm that reaches of the output light source bandwidth of described monochromator, saturation degree approaches 100%, output wavelength scope 350nm～800nm, completely covering visible light wave band; Described integrating sphere, can be realized the monochromatic even mixing of multichannel more than 99% in the spectral reflectance of visible light wave range; The chromaticity coordinates measuring accuracy of described color analyzer can reach x: ± 0.0015, y: ± 0.001, and measuring repeatability, good stability, can be used as standard measuring instruments and use.
Beneficial effect of the present invention is:
The present invention produces monochromatic light by monochromator can guarantee the monochromatic monochromaticity for colour mixture, and the chromaticity coordinates of exporting light is positioned at gamut boundary, has so just reached the calibration range that covers complete colour gamut.
The present invention by exporting the monochromatic light that overlaps monochromator generation more in integrating sphere after colour mixture, can realize so the continuous adjustable output of arbitrfary point on color domain space, and stability and the accuracy of output mixed light are high, can meet the calibration requirements of the instrument color parameters such as color analyzer, can be used as measurement standard and use.
Accompanying drawing explanation
Fig. 1 is the adjustable large colour gamut light source principle schematic of prior art;
Fig. 2 is the colour gamut light source chromaticity diagram that the narrow band pass filter of prior art is realized;
Fig. 3 is the primary colours of prior art, the light source chromaticity diagram that complementary color optical filter is realized;
Fig. 4 is the principle schematic of color calibration device of the present invention.
Embodiment
The present invention is directed to the problem that prior art exists, a kind of color calibration device that covers complete colour gamut is provided.Fig. 4 is the calibrating installation schematic diagram of colour gamut of the present invention and color domain coverage ratio.As shown in Figure 4, the calibrating installation in the present invention comprises: monochromator, light transmitting fiber, integrating sphere, luminosity probe, luminosity indicating gauge, color analyzer.Color calibration device of the present invention utilizes a plurality of monochromators to produce saturation degree and approaches 100% monochromatic light, use light transmitting fiber that monochromatic light is injected into and in integrating sphere, carries out colour mixture processing, by being attached to the luminosity probe of integrating sphere inwall, color blending effect is monitored, control integrating sphere light-emitting window place and produce the regulation light source that covers complete colour gamut, realize the calibration to analogous instrument photometric parameters such as color analyzers.There is colour gamut wide coverage, stable performance, accuracy advantages of higher, can be used as color measurement standard and uses
The color calibration device functions that covers complete colour gamut comprises:
Monochromator, realizes the broad spectrum light source of Halogen lamp LED output is exported to monochromatic light after grating beam splitting, utilizes a plurality of monochromators to export the monochromatic light of a plurality of different wave lengths, can be created in any chromaticity coordinates point on chromaticity diagram after colour mixture;
Light transmitting fiber, realizes and monochromator to be exported to monochromatic source is coupled in fibre-optic front end, through fiber optic transmission, to the other end, is injected into and in integrating sphere, carries out colour mixture;
Integrating sphere, for the monochromatic light of different wave length is carried out to colour mixture, mixed complex light is exported by integrating sphere light-emitting window, realizes the regulation light source output that covers complete gamut range;
Luminosity probe, for monitoring monochromatic light in the colour mixture result of integrating sphere, realizes the output of different monochromators is carried out to feedback regulation, for regulation light source provides indicating value output;
Color analyzer, for receiving the output light source after integrating sphere colour mixture, and measures the parameters such as chromaticity coordinates of described complex light, realizes the calibration to its color measuring result.
In specific embodiment of the invention process, major technique used comprises:
1, complete colour gamut regulation light source generating technique
Regulation light source is the key component of calibrating installation, in order to solve the problems of the technologies described above, the present invention has used the regulation light source production method based on monochromator and integrating sphere, by controlling the wavelength points of monochromator output light source, make tristimulus values XYZ corresponding to the mixed curve of spectrum, realize the continuous adjusting to complete color gamut space.
Wherein, by regulating grating rotational angle to realize the output light source wavelength of controlling monochromator; According to the curve of spectrum of luminosity probe test, to monochromator, feedback regulation is carried out in output; Complex light after colour mixture is exported by integrating sphere light-emitting window, by color analyzer, tests collection, obtains the measurement result of regulation light source.
2) color measurement instrument collimation technique
Calibrating installation in the present invention is applicable to the calibration to color measurement instrument colorimetric parameters such as color analyzers.In actual alignment test, need to provide a reliable and stable color analyzer as standard component, continuous adjusting by regulation light source produces a series of calibration point, can utilize Comparison Method to calibrate instrument to be measured, common color measurement instrument includes but not limited to spectral radiometer, color luminance meter and color difference analysis instrument.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (2)
1. cover a color calibration device for complete colour gamut, it is characterized in that, comprising:
Monochromator, realizes the broad spectrum light source of Halogen lamp LED output is exported to monochromatic light after grating beam splitting, utilizes a plurality of monochromators to export the monochromatic light of a plurality of different wave lengths, is created in any chromaticity coordinates point on chromaticity diagram after colour mixture;
Light transmitting fiber, is coupled to fibre-optic front end for monochromator being exported to monochromatic source, through fiber optic transmission, to the other end, is injected into and in integrating sphere, carries out colour mixture;
Integrating sphere, for the monochromatic light of different wave length is carried out to colour mixture, mixed complex light is exported by integrating sphere light-emitting window, realizes the regulation light source output that covers complete gamut range;
Luminosity probe, for monitoring monochromatic light in the colour mixture result of integrating sphere, realizes the output of different monochromators is carried out to feedback regulation, for regulation light source provides indicating value output;
Color analyzer, for receiving the output light source after integrating sphere colour mixture, and measures the chromaticity coordinates parameter of described complex light, realizes the calibration to its color measuring result.
2. color calibration device as claimed in claim 1, is characterized in that, comprising:
The output light source bandwidth of described monochromator is minimum is 0.5nm, and saturation degree is 100%, output wavelength scope 350nm～800nm;
Described integrating sphere, is realized the monochromatic even mixing of multichannel more than 99% in the spectral reflectance of visible light wave range;
The chromaticity coordinates measuring accuracy of described color analyzer is x: ± 0.0015, y: ± 0.001.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110542539A (en) * | 2019-06-23 | 2019-12-06 | 江苏同胜光电科技有限公司 | Chromatic aberration measuring device for optical lens |
| CN111594809A (en) * | 2020-04-29 | 2020-08-28 | 江苏复芯云物联科技有限公司 | Multifunctional color calibration system |
| CN113311659A (en) * | 2016-03-31 | 2021-08-27 | 大日本印刷株式会社 | Transmission type color calibration chart and calibration slide glass |
| CN114252239A (en) * | 2020-09-25 | 2022-03-29 | 北京振兴计量测试研究所 | Optical axis calibration device for multispectral composite photoelectric detection equipment |
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Patent Citations (4)
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| US20040188594A1 (en) * | 2003-05-01 | 2004-09-30 | Brown Steven W. | Spectrally tunable solid-state light source |
| CN103017907A (en) * | 2011-09-27 | 2013-04-03 | 财团法人工业技术研究院 | Correction method and measuring device for image type color analyzer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311659A (en) * | 2016-03-31 | 2021-08-27 | 大日本印刷株式会社 | Transmission type color calibration chart and calibration slide glass |
| CN110542539A (en) * | 2019-06-23 | 2019-12-06 | 江苏同胜光电科技有限公司 | Chromatic aberration measuring device for optical lens |
| CN111594809A (en) * | 2020-04-29 | 2020-08-28 | 江苏复芯云物联科技有限公司 | Multifunctional color calibration system |
| CN111594809B (en) * | 2020-04-29 | 2022-02-01 | 江苏复芯云物联科技有限公司 | Multifunctional color calibration system |
| CN114252239A (en) * | 2020-09-25 | 2022-03-29 | 北京振兴计量测试研究所 | Optical axis calibration device for multispectral composite photoelectric detection equipment |
| CN114252239B (en) * | 2020-09-25 | 2024-06-11 | 北京振兴计量测试研究所 | Optical axis calibration device of multispectral composite photoelectric detection equipment |
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Application publication date: 20140305 |