1、 IEC 62906-5-2 Edition 1.0 2016-06 INTERNATIONAL STANDARD Laser display devices Part 5-2:Optical measuring methods of speck le contrast IEC 62906-5-2:2016-06(en)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,n
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10、 on this publication or need further assistance,please contact the Customer Ser vice Centr e:csciec.ch.IEC 62906-5-2 Edition 1.0 2016-06 INTERNATIONAL STANDARD Laser display devices Part 5-2:Optical measuring methods of speck le contrast INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.260 ISBN 978-
11、2-8322-3455-6 Registered trademark of the International Electrotechnical Commission Warning!Make sure that y ou obtained this publication from an authorized distributor.colourinside 2 IEC 62906-5-2:2016 IEC 2016 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 Terms,definitions and abbreviat
12、ions.6 3.1 Terms and definitions.6 3.2 Abbreviations.6 4 Standard measuring conditions.7 4.1 General.7 4.2 Standard measuring environmental conditions.7 4.3 Measurement coordinate system.7 4.4 Darkroom conditions.8 4.5 Standard conditions of measuring equipment.8 4.5.1 General.8 4.5.2 Adjustment of
13、LDD.9 4.5.3 Conditions of measuring equipment.9 4.6 Screen conditions.10 4.6.1 General.10 4.6.2 Report.10 5 Measuring methods of speckle contrast.10 5.1 Speckle contrast measurement of still image.10 5.1.1 Purpose.10 5.1.2 Measuring conditions.10 5.1.3 Measuring the monochromatic speckle contrast of
14、 front projection.10 5.1.4 Measuring the monochromatic speckle contrast of rear projection.12 5.2 Calibration and diagnosis of the LMD.12 5.2.1 General.12 5.2.2 Calibration procedure and diagnosis for the highest Cs.13 5.2.3 Calibration procedure and diagnosis for the lowest Cs.13 Annex A(informativ
15、e)Spectral behaviour of the LD.15 A.1 Spectral behaviour of a single-longitudinal mode LD.15 A.2 Spectral behaviour of a multi-longitudinal mode LD.15 Annex B(informative)Recommendation on imaging sensor pixel size.16 Annex C(informative)Fundamental formulation of speckle contrast and the effects of
16、 measurement variables.18 C.1 Fundamental formulation.18 C.2 Effect of observation distance and iris radius.18 Annex D(informative)Possible errors and their sources.20 Bibliography.21 Figure 1 Coordinate system for projection direction and viewing direction.8 Figure 2 Example of measurement geometries for monochromatic speckle contrast of front projection.11 Figure 3 Example of measurement geometries for monochromatic speckle contrast of rear projection.12 Figure 4 Example of measurement geometr
