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BS IEC 62906-5-1:2021

BS IEC 62906-5-1:2021

$215.11

Laser displays – Measurement of optical performance for laser front projection

Published By Publication Date Number of Pages
BSI 2021 72
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
7 FOREWORD
9 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
10 3.2 Abbreviated terms
4 Standard measuring conditions
4.1 General
11 4.2 Standard measuring environmental conditions
4.3 Standard dark room conditions
4.4 Standard conditions of measuring equipment
12 4.5 Conditions of measuring equipment
4.5.1 General conditions
14 Figures
Figure 1 – Virtual screen setup with (a) the illuminance LMD or (b) reflectance standard placed at the projector image plane for standard measurements
15 4.5.2 Measurement coordinate system
4.5.3 Diffuse reflectance standard
Figure 2 – Polar coordinate system used to describe the inclinationand azimuthal angle of the projector
16 4.5.4 Illuminance meter
4.5.5 Colorimeter
4.5.6 Signal source of test patterns
4.5.7 Integrating sphere
17 4.5.8 Spectral radiance/irradiance meters
5 Adjustment of the laser projector
5.1 Projector and image plane placement
5.2 Focusing of the projector
18 5.3 Standard projector setup conditions
5.4 Standard image measurement locations
Figure 3 – Example image pattern with width H and height V used to focus the projector
19 5.5 Colour tile patterns
Figure 4 – Standard measuring locations on the projected image
20 5.6 RGBCMY colour pattern
Figure 5 – Set of four colour tile test patterns used for projector characterization
21 5.7 Measuring the projected image area
Figure 6 – Standard medium APL RGBCMY test pattern used forcentre illuminance and colour measurements with 25 % APL
22 5.8 Maintaining the normal working conditions
6 Measuring methods
6.1 Light output
6.2 Spectroradiometric measurements
6.2.1 General
6.2.2 Measuring equipment
6.2.3 Measuring method
Figure 7 – Area of projected image
23 6.2.4 Data analysis
6.3 Illuminance uniformity
6.3.1 General
6.3.2 Measuring equipment
24 6.3.3 Measuring method
6.4 Contrast ratio
6.4.1 General
6.4.2 Measuring equipment
6.4.3 Measuring method
25 6.5 Chromaticity coordinates
6.5.1 General
6.5.2 Measuring equipment
6.5.3 Measuring method
26 6.5.4 Data analysis
6.6 White point chromaticity coordinates and correlated colour temperature
6.6.1 General
6.6.2 Measuring equipment
27 6.6.3 Measuring method
6.6.4 Data calculation
6.7 Greyscale illuminance and chromaticity coordinates
6.7.1 General
6.7.2 Measuring equipment
6.7.3 Measuring method
28 6.8 Colour uniformity
6.8.1 General
6.8.2 Measuring equipment
6.8.3 Measuring method
Tables
Table 1 – Recommended format for greyscale results
29 6.8.4 Data analysis
6.9 Colour gamut
6.9.1 General
Table 2 – Example of colour uniformity analysis
30 6.9.2 Chromaticity gamut area
Table 3 – Equivalent 8-bit RGB input signals usedfor colour gamut area measurements
31 Figure 8 – Example representation of the chromaticitygamut area in the CIE 1931 chromaticity diagrams
32 6.9.3 CIELAB gamut volume
34 Figure 9 – Example of range in colours produced by a given displayas represented by the CIELAB colour space
Table 4 – Example of report format for CIELAB gamut volume
35 Annex A (normative)RGB boundary colours for CIELAB gamut volume measurements
A.1 General
A.2 Equally spaced 98 boundary colours on the RGB cube
Table A.1 – Equally spaced 98 RGB boundary colours used for CIELABgamut volume measurements
38 A.3 Recommended 602 boundary colours on the RGB cube
Table A.2 – Recommended RGB boundary colours used for CIELABcolour gamut volume measurements
53 Annex B (informative)Calculation method for CIELAB gamut volume
B.1 Purpose
B.2 Procedure for calculating the colour gamut volume
54 B.3 Number of sampled colours
B.4 RGB cube surface subdivision method for CIELAB gamut volume calculation
B.4.1 General
B.4.2 Assumption
Figure B.1 – Analysis flowchart for calculating the CIELAB gamut volume
55 B.4.3 Uniform RGB grid algorithm
56 Figure B.2 – Example of tessellation using a 5 × 5 gridof surface colours on the RGB cube
57 B.4.4 Software example execution
58 Figure B.3 – Example of tessellation for the RGB cube using a 3 × 3 grid
Table B.1 – Example data format used for CIELAB colour gamut volume measurements
59 Figure B.4 – Example of tessellation for the CIELAB gamut volume using a 3 × 3 grid
65 Annex C (informative)Calculation method for chromaticity gamut area overlap
C.1 Purpose
C.2 Chromaticity gamut area overlap
Figure C.1 – Example of CIE 1931 chromaticity gamut area overlapbetween the measured and reference colour gamut
66 Annex D (informative)Light output
D.1 White light output (WLO) method
D.1.1 Purpose
D.1.2 Measuring equipment
D.1.3 Measuring method
D.1.4 Data calculation
67 D.2 Colour-signal white (CSW) method
D.2.1 Purpose
D.2.2 Measuring equipment
D.2.3 Measuring method
68 D.2.4 Data calculation
69 Bibliography

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