ISO INTERNATIONAL STANDARD 9241-305 First edition 2008-11-15 Ergonomics of human-system interaction - Part 305: Optical laboratory test methods for electronic visual displays Ergonomie de Il'interaction homme-systeme Partie 305: Méthodes d'essai de laboratoire optique pour écrans de visualisation électroniques Reference number ISO 9241-305:2008(E) @ ISO 2008 y IHS under ted without license from IHS Not for Resale ISO 9241-305:2008(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 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 COPYRIGHTPROTECTEDDOCUMENT @ ISO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means 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 [email protected] Web www.iso.org Published in Switzerland @ Iso 2008 - All rights reserved ed without license from IHS Not for Resale ISO 9241-305:2008(E) Contents Page Foreword .iv Introduction 1 Scope 2 Normative references. 3 Terms and definitions . 4 General ...... 4.1 Measurements Basic measurements and derived procedures 4.2 4.3 Matrixofmeasurementconditionsmethodsandprocedures. 5 Measurement conditions.... 5.1 Preparationsandprocedures 5.2 Test accessories... 5.3 Test patterns .. 13 5.4 Alignment Measurementlocationandmeterposition 25 5.5 Light measuring device (LMD).... 28 5.6 Measurement field .. 30 5.7 Angularaperture 30 5.8 Meter time response 31 5.9 Test illumination . 5.10 Other ambient test conditions... 43 6 Measurement methods 44 6.1 Basic light measurements. 44 6.2 Luminance profile measurements ... 52 6.3 Directional light measurements .. 54 6.4 Temporal performance measurements 56 6.5 Reflection measurements... 72 6.6 Luminance analysis .85 6.7 Contrast analysis. 94 6.8 Colour analysis .... 6.9 Dimensionsandgeometries 113 6.10 Geometrics and defects... 127 6.11 Alignment of virtual image displays ... 145 7 Conformance . 159 Annex A (informative) Overview of the Iso 9241 series ... .160 Annex B (informative) Guidelines for measurement method types. .164 AnnexC(informative)Matrixofmeasurementproceduresandtheirsources.. .166 Annex D (informative) Bidirectional reflectance distribution function (BRDF) . 175 Annex E (informative) Uncertainty analysis guidelines . ..177 Annex F (informative) Reconstruction of luminance distribution by microstepping .182 Bibliography 183 Copyrght International Organizaionsadardizaonghtsreserved ii ut license from IHS Not for Resale ISO 9241-305:2008(E) 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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEc Directives, Part 2. adopted by the technical committees are circulated to the member bodies for voting. Publication as an Attention is drawn to the possibility that some of the elements of this document may be the subject of pate