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BS IEC 62906-5-2:2016

BS IEC 62906-5-2:2016

$142.49

Laser display devices – Optical measuring methods of speckle contrast

Published By Publication Date Number of Pages
BSI 2016 26
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This part of IEC 62906 specifies the standard measurement conditions and measurement methods for determining the monochromatic speckle contrast of laser display devices (LDDs). The LDDs may include hybrid types using both a laser or lasers, and spontaneous emission- based light sources, such as LEDs.

NOTE The monochromatic speckle contrast measurements do not include image quality issues.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
6 FOREWORD
8 1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and definitions
3.2 Abbreviations
9 4 Standard measuring conditions
4.1 General
4.2 Standard measuring environmental conditions
4.3 Measurement coordinate system
10 4.4 Darkroom conditions
4.5 Standard conditions of measuring equipment
4.5.1 General
Figures
Figure 1 – Coordinate system for projection direction and viewing direction
11 4.5.2 Adjustment of LDD
4.5.3 Conditions of measuring equipment
12 4.6 Screen conditions
4.6.1 General
4.6.2 Report
5 Measuring methods of speckle contrast
5.1 Speckle contrast measurement of still image
5.1.1 Purpose
5.1.2 Measuring conditions
5.1.3 Measuring the monochromatic speckle contrast of front projection
13 Figure 2 – Example of measurement geometries for monochromatic speckle contrast of front projection
14 5.1.4 Measuring the monochromatic speckle contrast of rear projection
5.2 Calibration and diagnosis of the LMD
5.2.1 General
Figure 3 – Example of measurement geometries for monochromatic speckle contrast of rear projection
15 5.2.2 Calibration procedure and diagnosis for the highest Cs
5.2.3 Calibration procedure and diagnosis for the lowest Cs
Figure 4 – Example of measurement geometries for Cs calibration
17 Annex A (informative) Spectral behaviour of the LD
A.1 Spectral behaviour of a single-longitudinal mode LD
A.2 Spectral behaviour of a multi-longitudinal mode LD
Figure A.1 – Example of spectral behaviour of a single-longitudinal mode LD
Figure A.2 – Example of spectral behaviour of a multi-longitudinal mode LD
18 Annex B (informative) Recommendation on imaging sensor pixel size
Tables
Table B.1 – Example of ssubj
19 Figure B.1 – Minimum subjective speckle grain size as a function of the F-number
20 Annex C (informative) Fundamental formulation of speckle contrast and the effects of measurement variables
C.1 Fundamental formulation
C.2 Effect of observation distance and iris radius
21 Figure C.1 – Measurement result of Cs by changing NAscreen-Iris
22 Annex D (informative) Possible errors and their sources
23 Bibliography

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BS IEC 62906-5-2:2016
$142.49