This standard specifies the measurement principle and method of fluorescent sample color (including white). This standard is applicable to the relative measurement of color and whiteness of reflective objects containing fluorescent substances. GB/T 9340-2001 Relative measurement method of fluorescent sample color GB/T9340-2001 Standard download decompression password: www.bzxz.net

ICS 17.180.20
National Standard of the People's Republic of China
GB/T 9340—2001
Method for relative measurement of the colour of fluorescent samples
2001-06-12 Issued
People's Republic of China
General Administration of Quality Supervision, Inspection and Quarantine
2001-12-01 Implementation
People's Republic of China
National Standard
Relative Measurement Method of Fluorescent Sample Colour
GB/T9340-2001
Published by China Standards Press
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Subject 584-609
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GB/T 9340-2001
This standard is a revision of the original standard GB/T9340-1988 "Relative Measurement Method of Fluorescent Sample Color". The technical changes to the previous version of this standard are as follows:
1. It is clarified that this standard includes the relative measurement of whiteness of fluorescent white samples; 2. The relevant definitions of fluorescent colors are added; 3. The colorimeter method, one of the relative measurement methods of fluorescent sample colors with wide practical application, is added; 4. Chapter 4 Classification of Fluorescent Color Measurement Methods is added. From the date of implementation, this standard will replace GB/T9340--1988. This standard is proposed and managed by the National Technical Committee for Color Standardization. This standard is drafted by the National Institute of Metrology. The main drafters of this standard are Xi Xiujin and Hu Weisheng. This standard was first issued in June 1988.
1 Scope
National Standard of the People's Republic of China
Method for relative measurement of the colour of fluorescent samples
This standard specifies the measurement principle and method of the colour of fluorescent samples (including white). This standard is applicable to the relative measurement of the colour and whiteness of reflective objects containing fluorescent substances. 2 Cited standards
GB/T9340-2001
Generation GB/T9340—1988
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T3978-1994 Standard illuminant and illumination observation conditions (neqCIES001:1986) GB/T8415-2001, Evaluation method of light simulator GB/T5698--2001 Color terms
3 Definitions
This standard adopts the following definitions. Www.bzxZ.net
3.1 Fluorescence
After certain substances are irradiated and excited by light of a certain wavelength or band (such as ultraviolet light), they emit light longer than the irradiation wavelength. This kind of radiated light is called fluorescence.
3.2 Fluorescent whitening agents (FWA) are a kind of achromatic compounds that can absorb the power of the ultraviolet region (about 300nm~400nm) of the irradiated light and excite fluorescence in the short-wave region (blue) of visible light, thereby increasing the visual whiteness of the material. 3.3 Fluorescence whiteness meter A special whiteness meter used to measure the whiteness of the most fluorescent materials or white samples with added fluorescent whitening agents. Its main feature is that it can measure the whiteness value of the sample under D light source.
3.4 ​​Fluorescence colorimeter fluorescence colorimeter A colorimeter used to measure the tristimulus values ​​or tricolor coordinates of the color of fluorescent samples. Its main feature is that it can measure the chromaticity value of the sample under Ds light source illumination.
Other color terms used in this standard shall be in accordance with the provisions of GB/T5698. 4 Classification of fluorescent color measurement methods
4.1 Spectrophotometry
Use a spectrophotometric colorimeter to first measure the spectral radiance factor of the sample, and then calculate the chromaticity value of the sample according to the colorimetric formula, or calculate the whiteness value of the sample according to the whiteness formula. 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/T9340-2001
4.2 Colorimeter method
Use a fluorescent colorimeter to directly measure the color value of the sample, or use a fluorescent whiteness meter to directly measure the whiteness value of the sample. 5 Spectrophotometry
5.1 Principle of spectral photometry
5.1.1 Principle Overview
Color samples containing fluorescent substances and white samples containing fluorescent whitening agents absorb radiation power in a certain wavelength region under the illumination of a specific light source, and emit radiation power in another longer wavelength region. Therefore, the emitted light contains both the reflection part of the illumination light and the fluorescence emission part excited by the illumination light. Usually, the color of fluorescent samples is observed and evaluated under daylight (complex color light), so when optical instruments are used to measure the color of fluorescent samples, there should be a good correlation with the visual evaluation results. This puts forward special requirements on the instrument's light source and the geometric conditions of illumination detection.
Figure 1 is a schematic diagram of color measurement of fluorescent samples under illumination of a polychromatic light simulating a D5 light source. In the figure, the illumination beam is incident on the sample in the vertical direction (0°) and detected at 45°, i.e., 0/45 illumination detection conditions. As shown in the figure, the colorimetric standard white plate and the fluorescent sample to be measured are placed between the simulated Ds light source and the incident slit of the monochromator, illuminated by the simulated Dss light source, and received by the monochromator and the detector. The spectral radiance factor β (>) of the fluorescent sample relative to the colorimetric standard white plate under the simulated D light source is measured, and then the chromaticity value and whiteness value are calculated according to the colorimetric formula.
Data calculation system
D6s light source
Detector
Sample standard
Figure 1 Schematic diagram of measurement principle
5.1.2 This standard adopts the CIE1964 supplementary standard colorimetric observer, i.e., the chromaticity function value of 10° field of view. 5.1.3 Light source
The illumination source used for the color measurement of fluorescent samples should be a simulated Ds light source. When making precise measurements, it is required to use a simulated Dss light source of not less than BC level. Its technical indicators shall comply with the provisions of GB/T8415. 5.1.4 This standard adopts the following illumination observation conditions: a) 45/0: the illumination beam is incident at 45° and observed in a direction perpendicular to the sample surface; b) 0/45: the illumination beam is incident from a direction perpendicular to the sample surface and observed at 45° c) d/o: the sample is illuminated by the light after being incident through the integrating sphere and observed in a direction perpendicular to the sample surface. Other technical conditions shall comply with the provisions of GB/T3978. 5.2 Measuring device
5.2.1 Spectral photometric colorimetric instrument with 45/0 illumination-observation conditions. The measured result is the spectral radiance factor β45/(a). 5.2.2 Spectral photometric colorimetric instrument with 0/45 illumination-observation conditions. The measured result is the spectral radiance factor βo/45 (a). 5.2.3 Spectral photometric colorimetric instrument with d/0 illumination-observation conditions. The measured result is the spectral radiance factor βa/o (>). 5.2.4 Spectral photometric colorimetric instruments used for fluorescent sample color measurement must meet the following technical conditions: a) The illumination light source is a simulated DSS light source;
b) The wavelength range is at least 400nm700nm; GB/T9340-—2001
c) The spectral passband half width of the instrument is within 10nm: d) The photometric accuracy should be within 0.5% of the full scale; e) The wavelength uncertainty is better than 0.5nm.
5.3 Measurement steps
a) Start the instrument according to the colorimetric instrument operating procedures and calibrate the baseline. b) Calibrate the instrument with a colorimetric standard white board.
c) Place the fluorescent sample to be measured in the measurement beam window, measure and record its spectral radiance factor β45/(a), Po/4s(λ) or βa/(a). 5.4 Calculation of measurement results
5.4.1 Calculate the tristimulus values ​​X, Y and Z of the fluorescent sample color according to formula (1): X=p(a) ()(a) )
Sa)()()
S()()(A)
Wherein:
λ-wavelength, which ranges from 400nm to 700nm at least; Sp(a)-
T()()z0()
-relative spectral power distribution of CIE standard illuminant Ds; CIE1964 Supplementary Standard Colorimetric Observer Chromaticity Function; (1)
The spectral chromaticity factors obtained by measuring the fluorescent sample color include: βas/o(a), Po/4s(a) and βa/o(a); Calculate the wavelength interval, generally 5nm or 10nm. 5.4.2 Calculate the three color coordinates and 2 according to formula (2): x
5.4.3 Calculate the whiteness W and light hue index Tw of the fluorescent white sample according to formula (3) and (4): W-Y+800(-r)+1700(-y)
Tw=900(a,)-650(yy)
Where: rw.ya
6 Colorimeter method
Three color coordinates of a completely reflecting diffuser in the CIE 1964 supplementary standard colorimetric system. 6.1 Colorimeter method measurement principle
(2)
(3)
The colorimeter method is a simple measurement method that uses a photoelectric integrating element with a specific spectral sensitivity and a colorimeter that meets the Luther condition to directly measure the chromaticity value or whiteness value of the sample. The detector of the fluorescent colorimeter (whiteness) uses a photocell, a phototube or a photomultiplier tube, which is equipped with a filter that fits the color vision characteristics of the human eye. The overall response of the spectral characteristics of the instrument (the comprehensive response of the instrument light source, detector and optical system) should be equivalent to the tristimulus value of the object under the D6 illuminant and the 10° field of view chromaticity function. That is: K,S()t,()r() = Sp(a) 10()
K,S()t,(a)r() = Sp(a) y1o()
K,s(a)t,(a)r(a) Sp(a) z1o()) In the formula:
Sp(a)-
-Relative spectral power distribution of the instrument light source: -D Relative spectral power distribution of the illuminant; KK,,K, constants independent of wavelength;
T.().T,(),T,()-
GB/T9340--2001
Relative spectral transmittance of the instrument specific filter; r(>)-Relative spectral responsivity of the instrument detector; (a),. (a), (a)——10° field of view chromaticity function. The color measurement condition that the instrument satisfies formula (5) is called the Luther condition, which determines the accuracy of the instrument's color measurement. 6.2 Measuring instruments
6.2.1 Fluorescent colorimeter.
6.2.2 Fluorescent whiteness meter.
6.3 The instrument adopts CIE1964 supplementary standard colorimeter observer, i.e., 10° field of view chromaticity function value. 6.4 The instrument light source is the same as 5.1.3.
6.5 The instrument lighting observation conditions are the same as 5.1.4. 6.6 Measuring method
After calibrating the instrument with a standard white plate or a standard color plate, place the sample to be measured and directly measure the three stimulus values, three color coordinates or whiteness value of the sample. Representation of the measurement results
7.1 The relative measurement results of the fluorescent sample color are expressed by the stimulus value Y and the three color coordinates z and y. The relative measurement results of the fluorescent white sample are expressed by the whiteness W and the light hue index Tw. 7.2 Additional records of the measurement results should include: the level of the D65 light source, the geometric conditions of lighting and observation, etc. If the measurement is done with an integrating sphere, it should be noted whether the specular reflection component is included. 7.3 Comparative measurements of the chromaticity and whiteness of fluorescent samples should be carried out under the same conditions. Copyright
Book number: 1550661-17856
GB/T9340-2001
Ke Ri 584-609
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