Some standard content:
GB/I7922—2003
This standard amends the standard for the full range of color of lighting sources in GB/I7922--_987*. Compared with GB/I7922-17, the main changes are as follows:
In-depth explanation:
Add scope and normative documents;
Remove the terminology listed in the original standard. This standard is implemented from the beginning. This standard is proposed and coordinated by the Technical Committee for Color Standardization. This standard is drafted by China National Institute of Construction Engineering, and the main drafters are Li Ya, Gong Hua and Zhang Nianping. The previous versions of this standard are as follows: GE/T7922—11871 Specification
Methods for measuring the color of lighting sources
This standard specifies the methods for measuring the color of lighting sources. This standard is applicable to the color measurement of various types of lighting sources. 2 Normative referenced documents
GB/T7922—2003
The clauses in the following documents become clauses of this standard through the date indicated in this document. For all referenced documents with a valid date, all subsequent amendments (including those with valid date) or revisions are still applicable to this standard. However, all parties to the agreement reached under this standard shall use the latest versions of these documents. For referenced documents without a valid date, their latest versions are applicable to this standard. GBTSU77
GT/T R97S
IIG ?
3 Classification of measurement methods
Color expression method
Measurement method of object package
Classification of (color) standard lamps
Total luminous flux When the standard lamp is used
The measurement method can be divided into two types: light radiation and colorimetry method and stimulus value direct reading method: When the test accuracy is required to be high, light radiation colorimetry method is used:
4 Spectral radiation colorimetry method
L. 1 Requirements for spectral radiation The light source for color measurement must meet the following conditions: 1) Wavelength range: 38:1nm780mm, 4m-7)nm: Micro wavelength accuracy: better than 0.5nm:
Stray light: Use a bright lamp as the light source, set the monochromatic wavelength to 450nm, and insert a stray light with a wavelength of d
5.m-nm on the incident light. At this time, the output signal of the stray light should be less than 2.01 of the output signal:
The detector should work in the linear range!
The photometric change should be within 1.
4.2 Determination of relative spectral power distribution of the light source 4.2.1 Test principle diagram
Test principle
Monochrome price
Light amplitude collection
Figure 1 Test principle diagram
Optoelectronic industry measurement
CB/T7922-2003
4.2.2 Standard light source
) The light irradiance standard lamp calibrated by the light meter department can draw the light intensity value or relative light distribution value at a certain wavelength. If it is necessary to find the double value at the middle wavelength, it can be derived by interpolation method according to formula (7). Sometimes geometric methods can also be used to calculate the market
formula,
-A--A)
S, tA,>
and the wavelength of the given light power distribution) S,,, and S,-Www.bzxZ.net
are the spectral power distribution values at the center,, respectively,.........( I)
is the standard lamp with a low temperature disk calibrated by the metrology department. When a color rendering standard lamp with a low temperature of 2K is used, the h
period of the lamp pool can use the value of the standard light source point given in Table] Table 1 Relative spectral distribution of standard light source A Long
59, x6
62, 33
72, 50
1' x,
121, 73
147, 24
166, 1
2.32, : 2
234, 5||tt| ...
S(x1 = c.(e -1)-l
English cat radiation constant. Unit win
r=,7477×10-wm*+
a constant radiation constant, unit product K
t-1.438BX10mK:
k single n
market method. Unit K
4. 2. 3 General conditions for testing
The test site shall not have any other ambient light that may affect the results of the test. The power supply and the monitoring circuits used for the standard light source to be tested shall comply with the specifications of the standard light source. The accuracy of the light source used shall also comply with the specifications of the standard light source: 4.2,4 Geometry of illumination and detection components
When measuring, the light source to be tested must be in the same position as the light source to be tested. The light must be irradiated by the integrating sphere as the light source. When integrating or irradiating, the light from the light source is first irradiated to the integrating sphere and then to the spectral instrument. When there is no reflector, the light from the light source is irradiated vertically. On the diffuse reflector, the light at an angle of 45° is grounded and then enters the spectrometer through an optical system. The light is measured according to the requirements of the spectrometer. The light is then measured according to the specifications of the instrument H1G247. 4.2.5 Test preparation
Before the test, the light source must be pre-luminescent and stable: Before the test, the photoelectric devices of the detector must be tested to make their performance stable: b) The wavelength must be selected in the same order as the spectrum width of the detector. 4.2.6 Calculation method of relative light power distribution: The relative light rate () formula is:
In the formula:
The relative light power of the light source is at: R, t) The light source to be tested is at the wavelength of the detector; the light source is at the optical center of the detector. 4.3 Calculation method of tristimulus values
The three stimuli values of Y, Y, and Y are calculated by the equal tube length method. Formula 4) is used for calculation. X=k
K'saaA
CB/T7922-2003
Wu Zhong:
S.(A)—The photoelectric conversion coefficient of the measured source: E1931XY7 colorimetry system chromaticity original number (then the longer the three,
K—Division coefficient
Table 2 CI positive E1931 standard colorimetry system spectral tristimulus value aum
0,00/6
n,34x1
3, 2511
3,1421
n, 3587
0. 4:3-0-1
(, 6784
. r62.
.10962
n,n4xo
f, tkfs
G, $7ES
. 5.$?
.F. E15:
c,cabs
c, 2374
1,7:71
1,7441
1, F52
.. 151:2
c,2123
.. .*2
e, 7514
F, E-1:
0, 447
G, G874
. 1227
6, 313
o, Rt63
0, 44° 2
n nnz1
0,0014
o,oong
0,0002
3 心o0
3, oc00
o, oono
n,nono
a, oono
0,0000
Generally, the color diffusion of the light source can sometimes produce a notch of about 10 wavelengths between 5 wavelengths, (I/T 7922—2303
In CTF1S64XZ supplementary standard colorimetric system, the color quality of the moon is calculated by 1.) (a), () (see Table 3> to replace (),),), and the rest is the same as the above formula. Change 3C to 1964Xm, Zm supplementary standard colorimetric system spectral tristimulus value a/nm
.0u72
. 25:1
9,a152
6,3042
s, nGne
. ic:3e
. 1063
P,FRET
f, 5235
r: non4
. 5851
1, s948
G G431||tt| |a, nin
u, uou
9,0000
3, ror
0,52SR
1, 243
t , cses
p,6475
. 4315
c, c57
0, 3G36
c,9384
n 2x3:
0,0441
3, 3111| |tt||, X 54
o,nono
3,3133
. ||n, nfs
GB/T7922—2003
2.3.1 Calculation method of color coordinates
The color coordinates in the CIE131XY2 color system are obtained by the following formula (5): I = X + Y + 2 | | tt | | + 121964 Insert Y: 2 to supplement the chromaticity coordinates am in your color system. You can use XY7 to replace XYZ in (5) or calculate and get ：
4. 3.2 Observation of color mixing
Should be within 0 pressure
5 Method of reading the stimulus value
5.1 Photoelectric colorimeter||tt| | The photoelectric measurement source must meet the following conditions: the optical center of the colorimeter, the light intensity of the blood, the standard negative system, the colorimetric requirements: single energy light source, two points of the fish Scatter value or chromaticity coordinates!
Reward for trial class: A: and A, Chen in 10.005 recommended domestic biF
5. 2 Different methods
5,2.1 Test recording|| tt|| The test site shall not have any external light that may affect the test results; the calibration light source and the standard test light source shall comply with the power supply, test bypass, and other related regulations. Technical standards and requirements: The ambient temperature during measurement should be in accordance with the relevant optical standards. The light source must be stable. The photoelectric device to be used for detection should be fully tested to determine its performance: e)
5.2.2 Geometric conditions of detection and illumination
The beam emitted from the point to be measured by the light , its center line should be perpendicular to the converter When measuring the color of a part of the light source, the central ray of light should be perpendicular to the detection surface, and the light from other parts of the light source should not be blocked. | You can also shoot light onto the wave reflector 1 as a standard calibration, and the receiving surface of the detector is aligned with the white report to allow the test plate to be measured. The working standard plate should be in accordance with the technical regulations in 6H/T3>79. 5.2.3 Calibration and measurement of photoelectric colorimeter
Use the light from the colorimeter with the stimulus value X, YZ or X:YZ% to calibrate. 5.2.3.1 Calibration light source The product meets the following requirements: the optical performance is stable and its stability is perfect. It is one of the essential parts for the measurement of the light source to achieve the required index! 1) The relative power distribution of the calibration light source is similar to that of the photometric light source. :) Junzhun uses Shangyuan's charging and shaping machine! Wait for the light source to scan similarly! 5.2.3.2 Photoelectric color measurement The calibration light source and the acquired light source shall be measured under the same lighting and detection conditions. And it is discussed that the photoelectric response value of each phase virtual thirteen-prick shielding value is obtained by the formula () of the full value of the source to be measured: 6
In the formula:
The three values of the measured light source are:
and the three values of the measured light source are the same, but the corresponding photoelectric response values are: F· The calibration light value has been calibrated to the three values of the calibrated light source: The stimulus value corresponds to the light response value. The expression of the test results should be recorded in the following items: the name, model and manufacturer of the light source being tested; a. Colorimetric instrument: optical radiation meter or colorimeter: Electrochromaticity meter model); b>
The lighting conditions and detection conditions of the measured light: di
When using a light hall to measure color, the spectral crown should be kept in mind. The city sample room has two standard light source types:
GB/T7922-2003
Instructions: CIE1921XY2 standard color system is used, and C11964X:Y:2% supplementary standard color Car system: H1
Thank you for the test result or:2 Photoelectric colorimetric measurement The calibration light source and the acquired light source are measured under the same lighting and detection conditions. The photoelectric response value of each corresponding stimulus value is obtained by formula (6
where:
is the stimulus value of the measured light source;
is the corresponding photoelectric response value of the acquired light source: F· Calibration light value: The light response value corresponding to the stimulus value of the standard light source. Expression of test results
Record the following items:
Name, model and manufacturer of the light source being measured; a
Colorimeter; light source or radiometer; b>
Illumination conditions and detection conditions of the light being measured: di
When using a light source to measure color, the type of standard light source should be recorded:
GB/T7922—2003
Instructions: CIE1921XY2 standard color system is used, and C11964X:Y:2% supplementary standard color system: H1
Test results or:2 Photoelectric colorimetric measurement The calibration light source and the acquired light source are measured under the same lighting and detection conditions. The photoelectric response value of each corresponding stimulus value is obtained by formula (6
where:
is the stimulus value of the measured light source;
is the corresponding photoelectric response value of the acquired light source: F· Calibration light value: The light response value corresponding to the stimulus value of the standard light source. Expression of test results
Record the following items:
Name, model and manufacturer of the light source being measured; a
Colorimeter; light source or radiometer; b>
Illumination conditions and detection conditions of the light being measured: di
When using a light source to measure color, the type of standard light source should be recorded:
GB/T7922—2003
Instructions: CIE1921XY2 standard color system is used, and C11964X:Y:2% supplementary standard color system: H1
Test results or:
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