CIE-S-012-E-2005.pdf
Reference number ISO 23603:2005(E) CIE S 012/E:2004 © ISO 2005 INTERNATIONAL STANDARD ISO 23603 CIE S 012/E First edition 2005-08-01 Standard method of assessing the spectral quality of daylight simulators for visual appraisal and measurement of colour Méthode normalisée d'évaluation de la qualité spectrale des simulateurs de lumière du jour pour le jugement visuel et la mesure des couleurs Copyright International Commission on Illumination Provided by IHS under license with CIELicensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/24/2007 08:39:10 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 23603:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. © ISO 2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii © ISO 2005 All rights reserved Copyright International Commission on Illumination Provided by IHS under license with CIELicensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/24/2007 08:39:10 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 23603:2005(E) © ISO 2005 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. ISO 23603 was prepared as Standard CIE S 012/E by the International Commission on Illumination, which has been recognized by the ISO Council as an international standardizing body. It was adopted by ISO under a special procedure which requires approval by at least 75 % of the member bodes casting a vote, and is published as a joint ISO/CIE edition. The International Commission on Illumination (abbreviated as CIE from its French title) is an organization devoted to international cooperation and exchange of information among its member countries on all matters relating to the science and art of lighting. ISO 23603 was prepared by CIE Technical Committee 1-53 A standard method for assessing the quality of daylight simulators. Copyright International Commission on Illumination Provided by IHS under license with CIELicensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/24/2007 08:39:10 MSTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Commission on Illumination Provided by IHS under license with CIELicensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/24/2007 08:39:10 MSTNo reproduction or networking permitted without license from IHS -,-,- CIE S 012/E:2004 ISO 23603:2005(E) © CIE 2004 All rights reserved © ISO 2005 All rights reserved v Standard Standard Method of Assessing the Spectral Quality of Daylight Simulators for Visual Appraisal and Measurement of Colour Méthode normalisée d'évaluation de la qualité spectrale des simulateurs de lumière du jour pour le jugement visuel et la mesure des couleurs Standardmethoden zur Bewertung der spektralen Qualität von Tageslichtsimulatoren für visuelle Beurteilung und Farbmessung CIE Standards are copyrighted and shall not be reproduced in any form, entirely or partly, without the explicit agreement of the CIE. CIE Central Bureau, Vienna CIE S 012/E:2004 Kegelgasse 27, A-1030 Vienna, Austria UDC: 535.65 Descriptor: Colorimetry 612.843.31 Colour vision CIE S 012/E:2004 Copyright International Commission on Illumination Provided by IHS under license with CIELicensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/24/2007 08:39:10 MSTNo reproduction or networking permitted without license from IHS -,-,- CIE S 012/E:2004 ISO 23603:2005(E) vi © CIE 2004 All rights reserved © ISO 2005 All rights reserved CIE 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from CIE Central Bureau at the address below. CIE Central Bureau Kegelgasse 27 A-1030 Vienna Austria Tel.: +43 1 714 3187 0 Fax: +43 1 714 3187 18 e-mail: ciecbping.at Web: www.cie.co.at/cie Copyright International Commission on Illumination Provided by IHS under license with CIELicensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/24/2007 08:39:10 MSTNo reproduction or networking permitted without license from IHS -,-,- CIE S 012/E:2004 ISO 23603:2005(E) © CIE 2004 All rights reserved © ISO 2005 All rights reserved vii FOREWORD Standards produced by the Commission Internationale de lEclairage (CIE) are a concise documentation of data defining aspects of light and lighting, for which international harmony requires such unique definition. CIE Standards are therefore a primary source of internationally accepted and agreed data, which can be taken, essentially unaltered, into universal standard systems. This International Standard has been prepared by CIE Technical Committee 1-53*, “A standard method for assessing the quality of daylight simulators“, and was approved by the National Committees of the CIE. Observed colours of objects depend on the illumination of the objects and the results of colour measurements may depend on the illumination used in the measurement. The CIE has standardized the spectral power distributions of several phases of daylight for use in observing and measuring colour. For practical applications in colour technology, illuminators are designed to illuminate specimens with light simulating one or more of these CIE illuminants. The accuracy of simulation has an important bearing on the accuracy of visual matches and colour measurements. CIE Technical Committee TC1.3 studied methods of assessing the spectral quality of daylight simulators and issued recommendations in the publication: CIE 51-1981 A method for assessing the quality of daylight simulators for colorimetry. That publication established the limits of the deviation from the ideal colour that initially qualified a simulator for consideration and established a test method to assign quality grades to simulators. The limits and test method expressed in that publication have been used throughout the world, since 1981. The historical development of the methodology is described in that publication. This standard is based on the principles and methods described in CIE 51-1981. There are several new features, based on recent research and standardization (JIS, 2000; McCamy, 1996 and 1999). CIE 51-1981 treated CIE Illuminants D55, and D75 as well as CIE standard illuminant D65. CIE illuminant D50, which is widely used in photographic and colour printing technologies, was included in a later supplement to CIE 51-1981 (CIE 135/3-1999 Visual metamers for assessing the quality of CIE illuminant D50) and is also included in this standard. CIE 51.2-1999 includes both the original publication and the supplement. CIE 51.2- 1999 specified limits on colour deviation graphically; this standard specifies the same limits numerically. CIE 51.2-1999 listed wavelength-dependent constants for visible-range assessment over the wavelength range from 400 nm to 700 nm; this standard lists those constants over the range from 380 nm to 780 nm. The constants and wavelength range for ultraviolet-range assessment in CIE 51.2-1999 are retained in this standard. For the special purpose of ultraviolet-range assessment, the wavelength range from 400 nm to 700 nm adequately represents the visible spectrum, because all of the fluorescence emission considered is within that range. * Chairman of this TC was C. S. McCamy (US), members were: D. H. Alman (US), R. Hirschler (BR), T. Ichijo (JP), J. T. C. van Kemenade (NL), M. R. Luo (UK), M. Pointer (UK), J. Schanda (HU), and J. C. Zwinkels (CA). Copyright International Commission on Illumination Provided by IHS under license with CIELicensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/24/2007 08:39:10 MSTNo reproduction or networking permitted without license from IHS -,-,- CIE S 012/E:2004 ISO 23603:2005(E) viii © CIE 2004 All rights reserved © ISO 2005 All rights reserved FOREWORD vii INTRODUCTION 1 1. SCOPE 1 2. NORMATIVE REFERENCES 1 3. DEFINITIONS AND SYMBOLS 1 4. REQUIREMENTS 3 4.1 Chromaticity tolerance 3 4.2 Quality grade 3 5. TEST METHODS 3 5.1 Spectroradiometry 3 5.2 Computations 3 5.2.1 Normalization 3 5.2.2 Chromaticity deviation 4 5.2.3 Virtual metameric pairs 4 5.2.4 Computing metamerism indices 4 6. TABLES 6 ANNEX: BIBLIOGRAPHY (INFORMATIVE) 18 Copyright International Commission on Illumination Provided by IHS under license with CIELicensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/24/2007 08:39:10 MSTNo reproduction or networking permitted without license from IHS -,-,- CIE S 012/E:2004 ISO 23603:2005(E) © CIE 2004 All rights reserved © ISO 2005 All rights reserved 1 INTRODUCTION The purpose of this assessment is to quantify the suitability of the spectral irradiance distribution of a practical simulator of CIE daylight illuminant D50, D55, D75 or CIE standard daylight illuminant D65 for the visual appraisal or measurement of colours of fluorescent or non-fluorescent specimens. The basis for the assessment is the special metamerism index for change in illuminant, using pairs of virtual (rather than real) specimens specified by their reflecting and fluorescing properties. The pairs of specimens are metameric matches under the CIE daylight illuminant, when evaluated with the CIE 1964 standard colorimetric observer. The method described in this standard quantifies the mismatch when the pairs of virtual specimens are illuminated by the simulator under test and evaluated by the same standard observer. A visible range metamerism index is derived to quantify the suitability of the simulator for the visible wavelength range. An ultraviolet range metamerism index is derived, using a different set of virtual metameric pairs, each pair having a fluorescent and a non-fluorescent specimen, which spectrally match for the CIE daylight illuminant and standard colorimetric observer. The non- fluorescent specimen in each pair is specified by its spectral radiance factor. The fluorescent specimen in each pair is specified by its spectral reflected radiance factor, relative spectral distribution of radiance due to fluorescence, and spectral external radiant efficiency of the fluorescent specimen. The ultraviolet range metamerism index quantifies the mismatch due to fluorescence resulting from the use of the simulator and the standard observer. 1. SCOPE This International Standard specifies a method of assessing the spectral quality of the irradiance provided by a daylight simulator to be used for visual appraisal of colours or for colour measurements and a method of assigning a quality grade to the simulator. It specifies the maximum permissible deviation of the chromaticity of the simulator from the chromaticity of the CIE standard daylight illuminant or CIE daylight illuminant being simulated, for a simulator to be graded by this method. 2. NORMATIVE REFERENCES The following standards and other documents contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All publications are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the publications indicated below. Members of CIE, the International Electrotechnical Commission (IEC) and the International Organisation for Standardization (ISO) maintain registers of currently valid international standards. CIE 15:2004. Colorimetry, 3rd edition. CIE 17.4-1987. International Lighting Vocabulary, ILV (joint IEC/CIE publication) CIE 51.2-1999. A method for assessing the quality of daylight simulators for colorimetry. CIE 63-1984. The spectroradiometric measurement of light sources. ISO 10526/CIE S 005-1999. CIE standard illuminants for colorimetry. ISO/CIE 10527-1991. Colorimetric observers. 3. DEFINITIONS AND SYMBOLS For the purposes of this standard, the following definitions and symbols apply. Definitions and symbols used in this standard, but not listed here, conform to CIE 17.4-1987 and CIE 15:2004. Copyright International Commission on Illumination Provided by IHS under license with CIELicensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/24/2007 08:39:10 MSTNo reproduction or networking permitted without license from IHS -,-,- CIE S 012/E:2004 ISO 23603:2005(E) 2 © CIE 2004 All rights reserved © ISO 2005 All rights reserved 3.1 simulator* device that provides spectral irradiance approximating that of a CIE standard daylight illuminant or CIE daylight illuminant, for visual appraisal or measurement of colours 3.2 quality grade* class of quality of
