CN102818623A - Method and system for calibrating brightness and chrominance meter - Google Patents
Method and system for calibrating brightness and chrominance meter Download PDFInfo
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- CN102818623A CN102818623A CN201210319778XA CN201210319778A CN102818623A CN 102818623 A CN102818623 A CN 102818623A CN 201210319778X A CN201210319778X A CN 201210319778XA CN 201210319778 A CN201210319778 A CN 201210319778A CN 102818623 A CN102818623 A CN 102818623A
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Abstract
The invention discloses a method for calibrating a brightness and chrominance meter. The method comprises the steps of measuring a preset auxiliary light source to obtain a measured brightness value and a measured chrominance value of the auxiliary light source, calculating brightness value conversion relation between the measured brightness value of the auxiliary light source and the measured chrominance value of the auxiliary light source and chrominance value conversion relation between the measured brightness value of the auxiliary light source and the measured chrominance value of the auxiliary light source, measuring a measured object to obtain a measured brightness value and a measured chrominance value of the measured object, calculating the brightness value of the measured object according to the measured brightness value of the measured object and the brightness value conversion relation, and calculating the chrominance value of the measured object according to the measured chrominance value of the measured object and the chrominance value conversion relation. Correspondingly, the invention further provides system for calibrating the brightness and chrominance meter. The brightness and chrominance meter is not required to be sent to an instrument calibration mechanism for special calibration, and the method and the system do not influence work progress and are high in measurement precision, quick and practical.
Description
Technical field
The present invention relates to light tone degree meter calibrating technical field, particularly relate to a kind of calibration steps of bright colorimeter, and a kind of calibration system of bright colorimeter.
Background technology
Along with the prolongation of service time, the measuring accuracy of bright colorimeter can descend thereupon, and therefore bright colorimeter needs periodic calibration, and its test parameter that standardizes makes it be operated in stable status, guarantees measuring accuracy.The calibration of general bright colorimeter need regularly be delivered to special instrument calibration mechanism and carry out the specialty calibration.
Yet in practical operation, because need of work, bright colorimeter generally all is installed on the fixed support, and specialized agency calibrates or timing signal when bright colorimeter is delivered to, and needs the dismounting instrument, and the installation accuracy when installing once more is difficult to guarantee.
Also have, bright colorimeter needs to use incessantly for a long time, perhaps using under the quite frequent situation, proofreaies and correct bright colorimeter if regularly be sent to special instrument calibration mechanism, can delay operate as normal; But if do not carry out regular calibration, the long-term use error of then bright colorimeter is bigger, can influence measuring accuracy.
Summary of the invention
Based on this; The present invention provides a kind of calibration steps and system of bright colorimeter; Need not that bright colorimeter is regularly delivered to instrument calibration mechanism and carry out professional calibration and can realize accurate measurement, can not influence job schedule, work efficiency significantly improves, measuring accuracy high, measuring process is simple and practical fast.
A kind of calibration steps of bright colorimeter comprises the steps:
Measure preset secondary light source, obtain the Measurement of Luminance value and measurement chromatic value of said secondary light source;
Calculate the chromatic value transformational relation between the chromatic value of measurement chromatic value and said secondary light source of brightness value transformational relation and said secondary light source between the brightness value of Measurement of Luminance value and said secondary light source of said secondary light source;
Measure measured object, obtain the Measurement of Luminance value and measurement chromatic value of said measured object;
The brightness value that calculates said measured object according to the Measurement of Luminance value and the said brightness value transformational relation of said measured object, the chromatic value that calculates said measured object according to the measurement chromatic value and the said chromatic value transformational relation of said measured object.
A kind of calibration system of bright colorimeter comprises secondary light source measurement module, first computing module, measured object measurement module and second computing module;
Said secondary light source measurement module is used to measure preset secondary light source, obtains the Measurement of Luminance value and measurement chromatic value of said secondary light source;
Said first computing module is used to calculate the chromatic value transformational relation between the chromatic value of measurement chromatic value and said secondary light source of brightness value transformational relation and said secondary light source between the brightness value of Measurement of Luminance value and said secondary light source of said secondary light source;
Said measured object measurement module is used to measure measured object, obtains the Measurement of Luminance value and measurement chromatic value of said measured object;
Said second computing module is used for calculating according to the Measurement of Luminance value of said measured object and said brightness value transformational relation the brightness value of said measured object, the chromatic value that calculates said measured object according to the measurement chromatic value and the said chromatic value transformational relation of said measured object.
The calibration steps of above-mentioned bright colorimeter and system, through measuring the Measurement of Luminance value and measurement chromatic value that secondary light source obtains said secondary light source, brightness value and the chromatic value with this standard sources compares again, obtains both transformational relations; In the Measurement of Luminance value that obtains measured object with after measuring chromatic value, can calculate the brightness value and the chromatic value of measured object through said transformational relation;
The present invention obtains the transformational relation of bright colorimeter between error amount and actual value through a secondary light source, and the measured value of this bright colorimeter can be revised according to this transformational relation, thereby improves measuring accuracy greatly;
Implementation procedure of the present invention is quick and convenient, and bright colorimeter need not to deliver to correcting mechanism to carry out professional calibration and can realize high-precision measurement, and work efficiency significantly improves.
Description of drawings
Fig. 1 is the calibration steps schematic flow sheet in one embodiment of the bright colorimeter of the present invention.
Fig. 2 is the calibration system structural representation in one embodiment of the bright colorimeter of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further explain, but embodiment of the present invention is not limited thereto.
As shown in Figure 1, be the schematic flow sheet of calibration steps in a preferred embodiment of the bright colorimeter of the present invention, comprise the steps:
S11, the preset secondary light source of measurement obtain the Measurement of Luminance value of said secondary light source and measure chromatic value;
Select a light source as secondary light source arbitrarily,, obtain the Measurement of Luminance value and measurement chromatic value of this secondary light source with this light source of light tone degree instrumentation amount; Bright colorimeter maybe be longer owing to service time, precise decreasing, and possibly there are error in the brightness value that measure this moment and the actual bright chromatic value of chromatic value and this light source, are not necessarily the actual value of this secondary light source.
Chromatic value transformational relation between the chromatic value of the brightness value transformational relation between the brightness value of S12, the Measurement of Luminance value of calculating said secondary light source and said secondary light source and the measurement chromatic value of said secondary light source and said secondary light source;
The reference light source that said secondary light source calibrates for error as this bright colorimeter, its brightness value and chromatic value are known; Bright colorimeter is being measured the measurement data that obtains behind this secondary light source, calculates with the bright chromatic value of this secondary light source, can obtain transformational relation;
The brightness value of above-mentioned secondary light source and chromatic value, in a preferred embodiment, said secondary light source can adopt the standard light source capsule; Because the standard light source capsule can provide standard sources; Brightness value and chromatic value that this standard sources is dispatched from the factory are known, measure calibration with it as secondary light source, and the calculating of transformational relation is to adopt the error amount of light tone degree instrumentation amount and the actual value of standard sources; Therefore result of calculation is accurate, can effectively improve measuring accuracy;
If do not adopt the standard light source capsule, also can use any light source, light tone degree instrumentation amount obtains the Measurement of Luminance value and measurement chromatic value of this light source; And the true brightness value of this light source and chromatic value can select the higher bright colorimeter of a known precision else and measure, and the bright chromatic value that the light tone degree instrumentation amount that known precision is higher obtains can calculate transformational relation equally as benchmark;
The acquisition of transformational relation between measured value and the actual value can be adopted multiple account form, sets up accurate transformational relation such as taking multiple measurements acquisition correlativity between them function;
In a preferred embodiment, step S12 specifically can be:
Calculate the ratio between the brightness value of Measurement of Luminance value and said secondary light source of said secondary light source, obtain said brightness value transformational relation;
Calculate the ratio between the chromatic value of measurement chromatic value and said secondary light source of said secondary light source, obtain said chromatic value transformational relation;
The computing method of above-mentioned employing ratio realize simple, and the measurement numerical value and the actual numerical value of bright colorimeter are divided by, and can obtain brightness value transformational relation and chromatic value transformational relation fast;
Therefore, as long as adopt the known light source of a true bright chromatic value as auxiliary reference light source, use this secondary light source of light tone degree instrumentation amount, measured value that calculates and the transformational relation between the actual value can be realized calibrating for error of this bright colorimeter.
S13, measurement measured object obtain the Measurement of Luminance value of said measured object and measure chromatic value;
Use light tone degree instrumentation amount testee, bright colorimeter shows the Measurement of Luminance value and measurement chromatic value of said measured object automatically.
S14, the brightness value that calculates said measured object according to the Measurement of Luminance value and the said brightness value transformational relation of said measured object, the chromatic value that calculates said measured object according to the measurement chromatic value and the said chromatic value transformational relation of said measured object;
Measuring measured object; After obtaining the Measurement of Luminance value of said measured object and measuring chromatic value; Can calculate the intrinsic brilliance value and the actual chromatic value of said measured object according to brightness value transformational relation that obtains among the step S12 and chromatic value transformational relation, thereby realize the accurate measurement of bright colorimeter.
Accordingly; The present invention also provides a kind of calibration system of bright colorimeter; As shown in Figure 2, be the structural representation of this calibration system in a preferred embodiment, comprise secondary light source measurement module 21, first computing module 22, measured object measurement module 23 and second computing module 24;
Said secondary light source measurement module 21 is used to measure preset secondary light source, obtains the Measurement of Luminance value and measurement chromatic value of said secondary light source;
Select a light source as secondary light source arbitrarily,, obtain the Measurement of Luminance value and measurement chromatic value of this secondary light source with this light source of light tone degree instrumentation amount; Bright colorimeter maybe be longer owing to service time, precise decreasing, and possibly there are error in the brightness value that measure this moment and the actual bright chromatic value of chromatic value and this light source, are not necessarily the actual value of this secondary light source.
Said first computing module 22 is used to calculate the chromatic value transformational relation between the chromatic value of measurement chromatic value and said secondary light source of brightness value transformational relation and said secondary light source between the brightness value of Measurement of Luminance value and said secondary light source of said secondary light source;
The reference light source that said secondary light source calibrates for error as this bright colorimeter, its brightness value and chromatic value are known; Bright colorimeter is being measured the measurement data that obtains behind this secondary light source, calculates with the bright chromatic value of this secondary light source, can obtain transformational relation;
The brightness value of above-mentioned secondary light source and chromatic value, in a preferred embodiment, said secondary light source can adopt the standard light source capsule; Because the standard light source capsule can provide standard sources; Brightness value and chromatic value that this standard sources is dispatched from the factory are known, measure calibration with it as secondary light source, and the calculating of transformational relation is to adopt the error amount of light tone degree instrumentation amount and the actual value of standard sources; Therefore result of calculation is accurate, can effectively improve measuring accuracy;
If do not adopt the standard light source capsule, also can use any light source, light tone degree instrumentation amount obtains the Measurement of Luminance value and measurement chromatic value of this light source; And the true brightness value of this light source and chromatic value can select the higher bright colorimeter of a known precision else and measure, and the bright chromatic value that the light tone degree instrumentation amount that known precision is higher obtains can calculate transformational relation equally as benchmark;
The acquisition of transformational relation between measured value and the actual value can be adopted multiple account form, sets up accurate transformational relation such as taking multiple measurements acquisition correlativity between them function;
In a preferred embodiment, said first computing module 22 can comprise brightness value computing module and chromatic value computing module;
Said brightness value computing module is used to calculate the ratio between the brightness value of Measurement of Luminance value and said secondary light source of said secondary light source, obtains said brightness value transformational relation;
Said chromatic value computing module is used to calculate the ratio between the chromatic value of measurement chromatic value and said secondary light source of said secondary light source, obtains said chromatic value transformational relation;
The computing method of above-mentioned employing ratio realize simple, and the measurement numerical value and the actual numerical value of bright colorimeter are divided by, and can obtain brightness value transformational relation and chromatic value transformational relation fast;
Therefore, as long as adopt the known light source of a true bright chromatic value as auxiliary reference light source, use this secondary light source of light tone degree instrumentation amount, measured value that calculates and the transformational relation between the actual value can be realized calibrating for error of this bright colorimeter.
Said measured object measurement module 23 is used to measure measured object, obtains the Measurement of Luminance value and measurement chromatic value of said measured object;
Use light tone degree instrumentation amount testee, bright colorimeter shows the Measurement of Luminance value and measurement chromatic value of said measured object automatically.
Said second computing module 24 is used for calculating according to the Measurement of Luminance value of said measured object and said brightness value transformational relation the brightness value of said measured object, the chromatic value that calculates said measured object according to the measurement chromatic value and the said chromatic value transformational relation of said measured object;
Measuring measured object; After obtaining the Measurement of Luminance value of said measured object and measuring chromatic value; Can be according to the brightness value transformational relation and the chromatic value transformational relation that obtain in first computing module 22; Calculate the intrinsic brilliance value and the actual chromatic value of said measured object, thereby realize the accurate measurement of bright colorimeter.
The calibration steps of above-mentioned bright colorimeter and system, through measuring the Measurement of Luminance value and measurement chromatic value that secondary light source obtains said secondary light source, brightness value and the chromatic value with this standard sources compares again, obtains both transformational relations; In the Measurement of Luminance value that obtains measured object with after measuring chromatic value, can calculate the brightness value and the chromatic value of measured object through said transformational relation;
The present invention obtains the transformational relation of bright colorimeter between error amount and actual value through a secondary light source, and the measured value of this bright colorimeter can be revised according to this transformational relation, thereby improves measuring accuracy greatly;
Implementation procedure of the present invention is quick and convenient, and bright colorimeter need not to deliver to correcting mechanism to carry out professional calibration and can realize high-precision measurement, has improved work efficiency greatly.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (6)
1. the calibration steps of a bright colorimeter is characterized in that, comprises the steps:
Measure preset secondary light source, obtain the Measurement of Luminance value and measurement chromatic value of said secondary light source;
Calculate the chromatic value transformational relation between the chromatic value of measurement chromatic value and said secondary light source of brightness value transformational relation and said secondary light source between the brightness value of Measurement of Luminance value and said secondary light source of said secondary light source;
Measure measured object, obtain the Measurement of Luminance value and measurement chromatic value of said measured object;
The brightness value that calculates said measured object according to the Measurement of Luminance value and the said brightness value transformational relation of said measured object, the chromatic value that calculates said measured object according to the measurement chromatic value and the said chromatic value transformational relation of said measured object.
2. the calibration steps of bright colorimeter according to claim 1; It is characterized in that the step of the chromatic value transformational relation between the chromatic value of the brightness value transformational relation between the Measurement of Luminance value of the said secondary light source of said calculating and the brightness value of said secondary light source and the measurement chromatic value of said secondary light source and said secondary light source is specially:
Calculate the ratio between the brightness value of Measurement of Luminance value and said secondary light source of said secondary light source, obtain said brightness value transformational relation;
Calculate the ratio between the chromatic value of measurement chromatic value and said secondary light source of said secondary light source, obtain said chromatic value transformational relation.
3. the calibration steps of bright colorimeter according to claim 2 is characterized in that, said secondary light source comprises the standard light source capsule.
4. the calibration system of a bright colorimeter is characterized in that, comprises secondary light source measurement module, first computing module, measured object measurement module and second computing module;
Said secondary light source measurement module is used to measure preset secondary light source, obtains the Measurement of Luminance value and measurement chromatic value of said secondary light source;
Said first computing module is used to calculate the chromatic value transformational relation between the chromatic value of measurement chromatic value and said secondary light source of brightness value transformational relation and said secondary light source between the brightness value of Measurement of Luminance value and said secondary light source of said secondary light source;
Said measured object measurement module is used to measure measured object, obtains the Measurement of Luminance value and measurement chromatic value of said measured object;
Said second computing module is used for calculating according to the Measurement of Luminance value of said measured object and said brightness value transformational relation the brightness value of said measured object, the chromatic value that calculates said measured object according to the measurement chromatic value and the said chromatic value transformational relation of said measured object.
5. the calibration system of bright colorimeter according to claim 4 is characterized in that, said first computing module comprises brightness value computing module and chromatic value computing module;
Said brightness value computing module is used to calculate the ratio between the brightness value of Measurement of Luminance value and said secondary light source of said secondary light source, obtains said brightness value transformational relation;
Said chromatic value computing module is used to calculate the ratio between the chromatic value of measurement chromatic value and said secondary light source of said secondary light source, obtains said chromatic value transformational relation.
6. the calibration system of bright colorimeter according to claim 5 is characterized in that, the said secondary light source in the said secondary light source measurement module comprises the standard light source capsule.
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| CN104483017A (en) * | 2014-12-02 | 2015-04-01 | 科世达（上海）管理有限公司 | Method and device for calibrating and correcting errors of light quantity sensor |
| CN105588642A (en) * | 2014-11-11 | 2016-05-18 | 仪器系统光学测量科技有限公司 | Colorimeter Calibration |
| CN111504465A (en) * | 2020-04-22 | 2020-08-07 | 上海精测半导体技术有限公司 | Colorimeter matching method, colorimeter correction method and system |
| CN111614916A (en) * | 2020-05-25 | 2020-09-01 | 上海精测半导体技术有限公司 | Colorimeter dark noise signal processing method and system |
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| CN111504465A (en) * | 2020-04-22 | 2020-08-07 | 上海精测半导体技术有限公司 | Colorimeter matching method, colorimeter correction method and system |
| CN111614916A (en) * | 2020-05-25 | 2020-09-01 | 上海精测半导体技术有限公司 | Colorimeter dark noise signal processing method and system |
| CN111614916B (en) * | 2020-05-25 | 2022-11-25 | 上海精测半导体技术有限公司 | Colorimeter dark noise signal processing method and system |
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