IEC 63145-20-10:2019

IEC 63145-20-10 ®
Edition 1.0 2019-08
INTERNATIONAL
STANDARD
colour
inside
Eyewear display –
Part 20-10: Fundamental measurement methods – Optical properties
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IEC 63145-20-10 ®
Edition 1.0 2019-08
INTERNATIONAL
STANDARD
colour
inside
Eyewear display –
Part 20-10: Fundamental measurement methods – Optical properties

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.180.99; 31.120 ISBN 978-2-8322-7269-5

– 2 – IEC 63145-20-10:2019  IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, abbreviated terms and letter symbols . 6
3.1 Terms and definitions. 6
3.2 Abbreviated terms . 7
3.3 Letter symbols (symbols for quantities and units) . 7
4 Standard measurement conditions . 8
4.1 Standard environmental conditions . 8
4.2 Power supply . 8
4.3 Warm-up time . 8
4.4 Dark room condition . 9
5 Measurement systems . 9
5.1 Standard coordinate system . 9
5.2 Measurement equipment . 10
5.2.1 Light measuring device (LMD) . 10
5.2.2 Stage conditions . 11
5.2.3 Setup conditions . 12
5.3 Test patterns . 14
5.3.1 General . 14
5.3.2 Checkerboard pattern . 14
5.3.3 Solid colour patterns . 14
5.4 Measuring points . 14
6 Measurement methods for optical characteristics . 15
6.1 General . 15
6.2 Preparation . 15
6.3 Luminance and luminance uniformity (non-uniformity) . 16
6.3.1 General . 16
6.3.2 Measurement procedure . 16
6.3.3 Calculation . 16
6.3.4 Report . 17
6.4 Chromaticity and colour gamut . 17
6.4.1 General . 17
6.4.2 Measurement procedure . 17
6.4.3 Calculation . 17
6.4.4 Report . 18
6.5 Chromaticity uniformity . 18
6.5.1 General . 18
6.5.2 Measurement procedure . 18
6.5.3 Calculation . 18
6.5.4 Report . 18
6.6 Contrast ratio . 19
6.6.1 General . 19
6.6.2 Measurement procedure . 19
6.6.3 Calculation . 19
6.6.4 Report . 19

6.7 Field of view (FOV) . 20
6.7.1 General . 20
6.7.2 Measurement procedure . 20
6.7.3 Calculation . 21
6.7.4 Report . 22
6.8 Eye-box based on luminance . 23
6.8.1 General . 23
6.8.2 Measurement procedure . 23
6.8.3 Report . 24
6.9 Pixel angular density . 24
6.9.1 General . 24
6.9.2 Measurement procedure . 24
6.9.3 Report . 25
Annex A (informative) Estimating the eye point . 26
A.1 General . 26
A.2 Eye point based on full field luminance method . 26
A.2.1 General . 26
A.2.2 Measurement procedure . 26
A.3 Eye point based on Michelson contrast method . 27
A.3.1 General . 27
A.3.2 Measurement procedure . 27
Annex B (informative) Explanation of measurement results . 29
B.1 Geographic coordinate chart . 29
B.2 Visual field . 29
Bibliography . 31

Figure 1 – Spherical coordinate system . 9
Figure 2 – Three-dimensional Cartesian coordinate system . 10
Figure 3 – Example of LMD structure . 11
Figure 4 – Examples of measurement setup . 13
Figure 5 – Example of 5 x 5 checkerboard pattern . 14
Figure 6 – Measuring points for the centre and multi-point measurement . 15
Figure 7 – Example of FOV boundary . 21
Figure 8 – Example of pixel angular density measurement . 24
Figure A.1 – Example of luminance image . 27
Figure A.2 – Example of image of resolution test pattern . 28
Figure B.1 – Example of geographic coordinate chart . 29
Figure B.2 – Example of visual field . 30

Table 1 – Letter symbols (symbols for quantities and units) . 8

– 4 – IEC 63145-20-10:2019  IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EYEWEAR DISPLAY –
Part 20-10: Fundamental measurement methods – Optical properties

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on te
...