1、July 2011 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 1
2、7.180.20!$s“1805827www.din.deDDIN EN ISO 11664-2Colorimetry Part 2: CIE standard illuminants (ISO 11664-2:2007)English translation of DIN EN ISO 11664-2:2011-07Farbmetrik Teil 2: CIE Normlichtarten (ISO 11664-2:2007)Englische bersetzung von DIN EN ISO 11664-2:2011-07Colorimtrie Partie 2: Illuminants
3、 CIE normaliss (ISO 11664-2:2007)Traduction anglaise de DIN EN ISO 11664-2:2011-07www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1807.11 DIN EN ISO 11664-2:2011-07 2 A comma is used as the decimal marker. National foreword This st
4、andard has been prepared by Technical Committee CIE “International Commission on ilumination” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Farbe (Colour Standar
5、ds Committee), Joint Working Committee NA 025-00-02 GA Gemeinschaftsarbeitsausschuss FNF/FNL: Farb-metrik. DIN EN ISO 11664 consists of the following parts, under the general title Colorimetry: Part 1: CIE standard colorimetric observers Part 2: CIE standard illuminants Part 4: CIE 1976 L*a*b* Colou
6、r space Part 5: CIE 1976 L*u*v* Colour space and u, v uniform chromaticity scale diagram EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11664-2 April 2011 ICS 17.180.20 English Version Colorimetry - Part 2: CIE standard illuminants (ISO 11664-2:2007) (ISO 11664-2:2007) Farbmetrik - Teil 2:
7、 CIE Normlichtarten (ISO 11664-2:2007)This European Standard was approved by CEN on 17 March 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-t
8、o-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by transla
9、tion under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland,
10、 France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMIT
11、EE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11664-2:2011: EColorimtrie - Partie 2: Illuminants CIE normaliss Contents DIN EN ISO 11664-2:2011-07 EN ISO
12、 11664-2:2011 (E) 2 Page Foreword3 1 Scope 4 2 Normative references 5 3 Definitions 5 4 CIE standard illuminant A.7 4.1 Definition .7 4.2 Theoretical basis .7 4.3 Supplementary notes .7 5 CIE standard illuminant D65 .8 5.1 Definition .8 5.2 Experimental basis .8 5.3 Correlated colour temperature 8 6
13、 CIE sources for producing CIE standard illuminants .8 6.1 CIE source A 8 6.2 Source for CIE standard illuminant D65 Annex Bibliography (informative) 16 .9 Foreword The text of ISO 11664-2:2007 has been prepared by Technical Committee CIE “International Commission on Illumination” of the Internation
14、al Organization for Standardization (ISO) and has been taken over as EN ISO 11664-2:2011 by Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical te
15、xt or by endorsement, at the latest by October 2011, and conflicting national standards shall be withdrawn at the latest by October 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held respons
16、ible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland
17、, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 11664-2:2007 has been approved by CEN as a EN I
18、SO 11664-2:2011 without any modification. DIN EN ISO 11664-2:2011-07 EN ISO 11664-2:2011 (E) 3 1 SCOPE This International Standard specifies two illuminants for use in colorimetry. The illuminants, which are defined in clauses 4 and 5 of this International Standard, are as follows: a) CIE standard i
19、lluminant A This is intended to represent typical, domestic, tungsten-filament lighting. Its relative spectral power distribution is that of a Planckian radiator at a temperature of approximately 2 856 K. CIE standard illuminant A should be used in all applications of colorimetry involving the use o
20、f incandescent lighting, unless there are specific reasons for using a different illuminant. b) CIE standard illuminant D65 This is intended to represent average daylight and has a correlated colour temperature of approximately 6 500 K. CIE standard illuminant D65 should be used in all colorimetric
21、calculations requiring representative daylight, unless there are specific reasons for using a different illuminant. Variations in the relative spectral power distribution of daylight are known to occur, particularly in the ultraviolet spectral region, as a function of season, time of day, and geogra
22、phic location. However, CIE standard illuminant D65 should be used pending the availability of additional information on these variations. Values for the relative spectral power distribution of CIE standard illuminants A and D65 are given in Table 1 of this International Standard. Values are given a
23、t 1 nm intervals from 300 nm to 830 nm. The term “illuminant“ refers to a defined spectral power distribution, not necessarily realizable or provided by an artificial source. Illuminants are used in colorimetry to compute the tristimulus values of reflected or transmitted object colours under specif
24、ied conditions of illumination. The CIE has also defined illuminant C and other illuminants D. These illuminants are described in Publication CIE 15:2004 but they do not have the status of primary CIE standards accorded to the CIE standard illuminants A and D65 described in this International Standa
25、rd. It is recommended that one of the two CIE standard illuminants defined in this International Standard be used wherever possible. This will greatly facilitate the comparison of published results. It is noted that in the fields of graphic arts and photography extensive use is also made of CIE illu
26、minant D50. In most practical applications of colorimetry, it is sufficient to use the values of CIE standard illuminants A and D65 at less frequent wavelength intervals or in a narrower spectral region than defined in this Standard. Data and guidelines that facilitate such practice are provided in
27、Publication CIE 15:2004, together with other recommended procedures for practical colorimetry. The term “source“ refers to a physical emitter of light, such as a lamp or the sky. In certain cases, the CIE recommends laboratory sources that approximate the spectral power distributions of CIE illumina
28、nts. In all cases, however, the definition of a CIE recommended source is secondary to the definition of the corresponding CIE illuminant, because of the possibility that, from time to time, new developments will lead to improved sources that represent a particular illuminant more accurately or are
29、more suitable for laboratory use. Subclause 6.1 of this International Standard describes CIE source A, which is recommended for laboratory realizations of CIE standard illuminant A. At present, there is no CIE recommended source representing CIE standard illuminant D65. DIN EN ISO 11664-2:2011-07 EN
30、 ISO 11664-2:2011 (E) 4 2 NORMATIVE REFERENCES The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. CI
31、E 15:2004. Colorimetry, 3rdedition. CIE 17.4-1987. International Lighting Vocabulary (ILV) - Joint publication IEC/CIE. ISO 23603:2005/CIE S 012/E:2004. Standard method of assessing the spectral quality of daylight simulators for visual appraisal and measurement of colour. CIE S 014-1/E:2006. Colori
32、metry Part 1: CIE standard colorimetric observers. ISO 11664-1:20073 DEFINITIONS For the purposes of this International Standard, the following definitions apply. These definitions are taken from CIE 17.4-1987, where other relevant terms will also be found. 3.1 chromaticity coordinates (see ILV 845-
33、03-33) ratio of each of a set of three tristimulus values to their sum NOTE 1: As the sum of the three chromaticity coordinates equals 1, two of them are sufficient to define a chromaticity. NOTE 2: In the CIE 1931 and 1964 standard colorimetric systems, the chromaticity co-ordinates are represented
34、 by the symbols x, y, z and x10, y10, z10. 3.2 chromaticity diagram (see ILV 845-03-35) plane diagram in which points specified by chromaticity co-ordinates represent the chromaticities of colour stimuli 3.3 CIE standard illuminants illuminants A and D65 defined by the CIE in terms of relative spect
35、ral power distributions 13.4 CIE sources artificial sources, specified by the CIE, whose relative spectral power distributions are approximately the same as those of CIE standard illuminants 13.5 CIE 1976 uniform chromaticity scale diagram; CIE 1976 UCS diagram (see ILV 845-03-53) uniform chromatici
36、ty scale diagram produced by plotting in rectangular co-ordinates v against u, quantities defined by the equations u = 4X/(X + 15Y + 3Z) = 4x/(-2x + 12y + 3) v = 9Y/(X + 15Y + 3Z) = 9y/(-2x + 12y + 3) X, Y, Z are the tristimulus values in the CIE 1931 or 1964 standard colorimetric systems, and x, y
37、are the corresponding chromaticity coordinates of the colour stimulus considered. 3.6 colour temperature Tc (see ILV 845-03-49) temperature of a Planckian radiator whose radiation has the same chromaticity as that of a given stimulus 1This definition is a revision of the definition given in CIE 17.4
38、-1987. DIN EN ISO 11664-2:2011-07 EN ISO 11664-2:2011 (E) 5 3.7 correlated colour temperature Tcp (see CIE 15:2004 Section 9.5) 2temperature of a Planckian radiator having the chromaticity nearest the chromaticity associated with the given spectral distribution on a diagram where the (CIE 1931 stand
39、ard observer based) u, 2/3v coordinates of the Planckian locus 3and the test stimulus are depicted NOTE 1: The concept of correlated colour temperature should not be used if the chromaticity of the test source differs more than C = (ut-uP)2+94(vt-vP)21/2= 5x10-2from the Planckian radiator, where ut,
40、vtrefer to the test source, uP,vPto the Planckian radiator. NOTE 2: Correlated colour temperature can be calculated by a simple minimum search computer program that searches for that Planckian temperature that provides the smallest chromaticity difference between the test chromaticity and the Planck
41、ian locus or by any other equivalent method. 43.8 daylight illuminant (see ILV 845-03-11) illuminant having the same, or nearly the same, relative spectral power distribution as a phase of daylight 3.9 illuminant (see ILV 845-03-10) radiation with a relative spectral power distribution defined over
42、the wavelength range that influences object colour perception 3.10 Planckian radiator; blackbody (see ILV 845-04-04) ideal thermal radiator that absorbs completely all incident radiation, whatever the wavelength, the direction of incidence or the polarization. This radiator has, for any wavelength a
43、nd any direction, the maximum spectral concentration of radiance for a thermal radiator in thermal equilibrium at a given temperature. 3.11 Planckian locus (see ILV 845-03-41) locus of points in a chromaticity diagram that represents chromaticities of the radiation of Planckian radiators at differen
44、t temperatures 3.12 primary light source (see ILV 845-07-01) surface or object emitting light produced by a transformation of energy 3.13 secondary light source (see ILV 845-07-02) surface or object which is not self-emitting but receives light and re-directs it, at least in part, by reflection or t
45、ransmission 3.14 tristimulus values (of a colour stimulus) (see ILV 845-03-22) amounts of the three reference colour stimuli, in a given trichromatic system, required to match the colour of the stimulus considered NOTE: In the CIE standard colorimetric systems, the tristimulus values are represented
46、 by the symbols X, Y, Z and X10, Y10, Z10. 2This definition is a revision of the definition given in CIE 17.4-1987. 3In calculating the chromaticity coordinates of the Planckian radiator the c2value according to ITS-90 has to be used (c2= 1,4388) in Plancks equation for standard air, but assuming n=
47、1. 4CIE 15:2004 suggests one possible method recommended by Robertson (1968). DIN EN ISO 11664-2:2011-07 EN ISO 11664-2:2011 (E) 6 4 CIE STANDARD ILLUMINANT A 4.1 Definition The relative spectral power distribution SA() is defined by the equation 18482101,435exp1560848210 ,435 1exp560100)(775A=S (1)
48、 where is the wavelength in nanometres and the numerical values in the two exponential terms are definitive constants originating from the first definition of Illuminant A in 1931. This spectral power distribution is normalized to the value 100 (exactly) at the wavelength 560 nm (exactly). CIE stand
49、ard illuminant A is defined over the 300 nm to 830 nm spectral region. NOTE 1: Table 1 provides the relative spectral power distribution of CIE standard illuminant A between 300 nm and 830 nm to six significant digits, at one nm intervals. For all practical purposes it suffices to use these tabulated values instead of the values calculated from equation 1. NOTE 2: Despite the fact that equation 1 is based on Plancks equation for vacuum, the wavelengths are to be taken as being in standard air (dry air at 15C and 101325 Pa
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