This standard specifies the quality evaluation method for daylight simulators. This standard applies to daylight simulators that simulate CIE standard illuminants by combining radiation sources and correction filters - D55, D65 and D75 light sources. GB/T 8415-2001 Evaluation method for daylight simulators GB/T8415-2001 Standard download decompression password: www.bzxz.net
This standard specifies the quality evaluation method for daylight simulators. This standard applies to daylight simulators that simulate CIE standard illuminants by combining radiation sources and correction filters - D55, D65 and D75 light sources.

ICS.17.180.20
National Standard of the People's Republic of China
GB/T 8415—2001
Method for assessing the quality of daylight simulators
Issued on 2001-06-12
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implemented on 2001-12-01
GB/T8415—2001
This standard is formulated based on the "Method for assessing the quality of daylight simulators" recommended in the 1981 report of the International Commission on Illumination publication CIE No.51 (TC-1.3). This standard is a revision of the original standard GB/T8415—1987 "Method for assessing the quality of daylight simulators". The technical changes of this standard over the previous version are mainly that the relevant reference standards are added in the content; the format and expression of the standard are further improved and standardized.
This standard will replace GB8415-1987 from the date of implementation. Appendix A of this standard is a prompt appendix.
This standard is proposed and coordinated by the National Technical Committee for Color Standardization. This standard is drafted by the China National Institute of Metrology. The main drafters of this standard are Teng Xiujin and Hu Weisheng. This standard was first issued in December 1987. 1 Scope
National Standard of the People's Republic of China
Method for assessing the quality of daylight simulators
This standard specifies the quality assessment method for daylight simulators (hereinafter referred to as D light source). GB/T8415-—2001
Replaces GB/T8415—1987
This standard applies to daylight simulators—Dss, Des and Dr5 light sources—which simulate CIE standard illuminants by combining radiation sources and correction filters.
2 Referenced standards
The following standards contain provisions that constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. Methods of expressing colors
GB/T3977—1997
GB/T5698—2001 Color terms
GB/T7921-—1997 Color space and color difference formulas 3 Definitions and symbols
This standard adopts the following definitions.
3.1 Spectral reflection radiance factor reflectionspectralradiancefactor Symbol: βs(a)
Under the same specified irradiation conditions, the ratio of the spectral radiance caused by the reflection of the material to the spectral radiance of a completely reflecting diffuser.
3.2 Fluorescence spectral radiance factor fluorescentspectralradiancefactor Symbol: (a)
Under the same specified irradiation conditions, the ratio of the spectral radiance caused by the fluorescence emitted by the material to the spectral radiance of a completely reflecting diffuser.
3.3 Spectralradiancefactor spectralradiancefactor Symbol: r(a)
Spectral radiance factor of fluorescent material. Including reflection spectral radiance factor βs (A) and fluorescence spectral radiance factor βL(), that is: Br(a)=s(a)+Br(a)
3.4 ​​Fluorescence radiant efficiency fluorescenceradiantefficiency The ratio of the radiation emitted by the fluorescent material in units of energy to the absorbed radiation. 3.5 External spectral radiant efficiency Symbol: Q(X)
The ratio of the spectral radiation emitted on the surface of the fluorescent material to the incident spectral radiation. The symbol "λ" is the fluorescence excitation wavelength. Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on June 12, 2001 and implemented on December 1, 2001
GB/T8415—2001
3.6 Relative spectral distribution of radiant fluorescent emission Symbol: F(a)
The relative distribution of the fluorescence emission radiation of the fluorescent material with wavelength. And definition: ZF(a)=1.0. Other terms used in this standard shall be in accordance with the provisions of GB/T5698. 4 Measurement of D light source
The spectral power distribution of D light source shall be determined by measuring with a spectroradiometer in the visible spectral region and the near ultraviolet spectral region. 4.1 The radiometer should measure the spectral irradiance or radiance on the sample surface. The selective effects of the modulators such as lenses, reflectors, diffusers, color filters and box walls in the D light source at all wavelengths should be included in the measurement. 4.2 The wavelength range of the spectral irradiance measurement of the D light source is 300nm~700nm; the wavelength interval is 5nm; the half width of the spectral passband of the instrument is 5nm.
4.3 Normalization
The relative spectral power distribution of the D light source measured should be normalized according to formula (1): S.() =100 S(a)/
s()yio(a)a
Where: S. (X)—normalized relative spectral power distribution of the D light source to be measured: S(A)—relative spectral power distribution of the D light source to be measured; λ—wavelength;
y1c (A)—one of the chromaticity functions of the CIE1964 Supplementary Standard Colorimetry System. 4.4 Chromaticity expression
The trichromatic coordinates of the D light source must fall within the specified range near the trichromatic coordinates of the standard illuminant in the CIE1976u10-uniform chromaticity diagram. This range is a circle with the standard illuminant as the center and a radius of 0.015. Figure 1 shows the chromaticity domain allowed by the standard illuminants Ds, Ds and D5 in the 210-y1o chromaticity diagram. These ellipses are circles in the CIE1976u1.u1.uniform chromaticity diagram. Light sources with trichromatic coordinates outside these ellipses lose the significance of this standard evaluation. 0.40
Figure 1 Allowable chromaticity range of Dss, Ds and Ds light sources 5 Calculation of metamerism index
GB/T8415-2001Www.bzxZ.net
The calculation of tristimulus values ​​must use the CIE1964 supplementary standard colorimetry system chromaticity function and the relative spectral power distribution value of the D light source after normalization. Using a 5nm wavelength interval, weighted calculation of tristimulus values ​​is performed in the wavelength range of 400nm to 700nm. 5.1 Calculation of metamerism index in the visible region
5.1.1 From Table 1, obtain the spectral reflectance radiance factor values ​​of five pairs of metamers (each pair consists of a standard sample and a corresponding metamer sample).
5.1.2 According to GB/T3977, calculate the tristimulus values ​​of each of the five pairs of isochromatic bodies according to formula (2): X
Wherein:
s.(a)p:(a)(a)
s.()p,()y.()
S.(p(a)z(a)
The spectral radiance factors of the five pairs of isochromatic bodies used for evaluation in the visible region. As specified in Table 1, where =1~5;
o(A), Jr (>), 10 () - CIE1964 Supplementary Standard Colorimetry System Chromaticity Function. 5.1.3 According to GB/T7921, calculate the color difference between the five pairs of isochromatic bodies respectively. Use CI Calculate the color difference AE using the ELUV color difference formula, and calculate the color difference AE% using the CIELAB color difference formula. 5.1.4 The metamerism index MIva in the visible region is calculated using the color difference of five pairs of isochromatic bodies according to formula (3); MI
wherein: AE-
ZAE:/5
-the color difference between the ith pair of isochromatic bodies, which can be △E or △E. 5.2 Calculation of metamerism index in the ultraviolet region
The isochromatic pairs used for evaluation in the ultraviolet region consist of a fluorescent sample and a non-fluorescent sample. 5.2.1 Obtain the spectral characteristic data of the three fluorescent samples from Table 2, and calculate the spectral radiance factor of the fluorescent sample using formula (4): βr(a) = βs() + βL()
Where: β(>)-
Bs(a)-
Where: N-
Spectral radiance factor;
Spectral reflectance radiance factor.
Bt(a)=N·F(a)/S.(a)
Effective excitation number;
Where: S.(a*) - S. (a) value in the wavelength range of 300nm to 460nm; surface spectral radiation efficiency,
a - fluorescence excitation wavelength, nm;
- reflection and emission wavelength, nm;
F(>) relative spectral radiation power distribution emitted by fluorescence; Br. (a) -
fluorescence spectral radiance factor.
5.2.2 From Table 3, obtain the light-increased reflection radiance factor values ​​of the three non-fluorescent samples used for evaluation in the ultraviolet region. 5.2.3 Calculate the tristimulus values ​​of the three pairs of isochromatic bodies according to formula (2). 5.2.4 Calculate the color difference △E% or AE between the three pairs of isochromatic bodies according to the provisions of GB/T7921. (3)
(4)
GB/T8415-2001
5.3 The ultraviolet region metamerism index MI is calculated by the color difference of the three pairs of isochromatic bodies according to formula (5): MI=
Wherein: AE is the color difference between the first pair of isochromatic bodies, which can be △E% or △E. Where j=1～3. 6 Evaluation of D light source
D light source evaluation is divided into A from good to bad according to the value of metamerism index. , B, C, D, E. 6.1 Classification by metamerism index MI and MI value; CIELAB
CIELUV
0.32~0.65
·(5)
6.2 According to the metamerism index MI% value of the visible region calculated in 5.1.4, the level of the D light source in the visible region to be evaluated is given. For example, if the MIm calculated by the CIELAB color difference formula for a simulator is 0.3, it is rated as Class B. 6.3 According to the metamerism index MI. value of the ultraviolet region calculated in 5.3, the level of the D light source in the ultraviolet region to be evaluated is given. For example, if the MIm calculated by the CIELAB color difference formula for a simulator as above is 0.3, it is rated as Class B. =0.6, rated as C. 6.4 Overall rating of D light source to be evaluated
The rating of D light source is comprehensively expressed according to the levels set by the values ​​of MI and MI. The first step gives the level in the visible region, and the second step gives the level in the ultraviolet region. For example, the simulator above is rated as BC. And indicate the color difference formula used. For example, the CIELAB color difference formula. Table 1 Spectral reflectance radiance factor table of heterochromatic isochromatics used for visible region evaluation Wave
Heterochromatic isochromatic
GB/T8415-2001
Table 1 (continued)
Heterochromatic isochromatic
.0.605
GB/T8415—2 001
Table 1 (continued)
Heterochromatic spectrum
.0.086
GB/T8415—2001
Table 1 (continued)
GB/T8415—2001
Table 1 (end)
GB/T8415—2001
2 Spectral characteristics of three fluorescent samples in heterochromatic pairs for evaluation in the ultraviolet region Sample 1
Sample 2
Sample 3
Sample 1
GB/T8415—2001
Table 2 (continued)
Sample 2
Sample 3
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