IEC 62629-62-11:2022
(Main)3D display devices - Part 62-11: Measurement methods for virtual-image type - Optical
3D display devices - Part 62-11: Measurement methods for virtual-image type - Optical
IEC 62629-62-11:2022 specifies the standard measuring conditions and measurement methods for determining the optical properties of the image created by 3D display devices and virtual-image optics such as head-up displays. The virtual image refers to an image in which the 3D visual information is superimposed with the outside world. Eye-wear type displays are however beyond the scope of this document.
NOTE The meaning of a virtual image in optics is in general an image formed when the outgoing rays from a point on an object always diverge. With regard to display application, a virtual image can be interpreted according to a real viewing case. When an image is viewed, even though there is no physical display (monitor, TV, screen), in front of a person's eyes, it is called virtual image.
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IEC 62629-62-11 ®
Edition 1.0 2022-11
INTERNATIONAL
STANDARD
colour
inside
3D display devices –
Part 62-11: Measurement methods for virtual-image type – Optical
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IEC 62629-62-11 ®
Edition 1.0 2022-11
INTERNATIONAL
STANDARD
colour
inside
3D display devices –
Part 62-11: Measurement methods for virtual-image type – Optical
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120; 31.260 ISBN 978-2-8322-6006-7
– 2 – IEC 62629-62-11:2022 © IEC 2022
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 8
4 Measurement systems . 8
4.1 Measuring device . 8
4.2 Measuring setup . 9
4.2.1 Eye-box and virtual image plane . 9
4.2.2 Determination of the eye-box . 9
4.2.3 Measuring configuration for geometric property . 11
4.2.4 Test image and denotation for the captured test image . 12
5 Common measurement applied for 3D virtual-image geometry . 13
5.1 General . 13
5.2 Position estimation of measuring points . 13
6 Measurement method for the geometry property of the virtual image plane . 16
6.1 Measurement of virtual image distance . 16
6.1.1 Conditions . 16
6.1.2 Procedures . 16
6.1.3 Reports. 16
6.2 Measurement of look down/over angle . 17
6.2.1 Conditions . 17
6.2.2 Procedures . 17
6.2.3 Reports. 17
6.3 Measurement of field of view. 18
6.3.1 Conditions . 18
6.3.2 Procedures . 18
6.3.3 Reports. 19
7 Measurement methods for the geometric distortion of the virtual image plane . 19
7.1 General . 19
7.2 Measurement of static distortion . 19
7.2.1 Conditions . 19
7.2.2 Procedures . 20
7.2.3 Reports. 20
8 Measurement method for the distance between a user and a 3D virtual object. 21
8.1 General . 21
8.2 Measurement method . 21
8.2.1 Conditions . 21
8.2.2 Procedures . 21
8.2.3 Reports. 22
9 Measurement methods for luminance and chromaticity . 22
9.1 General . 22
9.2 Measurement for luminance drop over the eye-box . 22
9.2.1 Conditions . 22
9.2.2 Procedures . 23
9.2.3 Reports. 25
9.3 Measurement of the luminance and chromaticity for the virtual-image plane . 25
9.3.1 Conditions . 25
9.3.2 Procedures . 26
9.3.3 Reports. 28
Annex A (informative) Comparison of measurement items between the conventional
3D display and the virtual-image type 3D display . 29
Annex B (informative) Comparison of the optical-property measurement methods for
virtual images . 31
Annex C (informative) Additional information for geometric property measurement of
3D virtual images using imaging LMDs. 34
C.1 General . 34
C.2 Reasons for the necessity of using three imaging LMDs . 34
C.3 Geometric calibration process for the imaging LMDs . 35
Annex D (informative) Measurement for static crosstalk . 38
D.1 General . 38
D.2 Preparations . 38
D.3 Procedures . 39
D.4 Reports . 42
Bibliography . 43
Figure 1 – Geometric relationship between an eye-box and a virtual-image plane . 9
Figure 2 – Configuration for determination of the eye-box . 10
Figure 3 – Measuring setup for geometric property . 11
Figure 4 – Test image with nine measuring points (top) and the three corresponding
images captured by three imaging LMDs (bottom) . 12
Figure 5 – Denotation for each of the three corresponding images captured by three
imaging LMDs . 13
Figure 6 – Geometric relationship of the black circle of P in the test image, two
L R
imaging LMDs, and the captured P (indicated by and ) by the two imaging
m m
11 11
LMDs of LMD and LMD . 15
L R
Figure 7 – Denotation for the black circle indicated by P (i and j = 1) in the three
corresponding images captured by three imaging LMDs. 15
Figure 8 – Measuring condition for the virtual image distance . 16
Figure 9 – Measuring conditions for look down and look over angles . 17
Figure 10 – Measuring conditions for field of view (FOV) . 19
Figure 11 – Measuring conditions for evaluating static distortion . 20
Figure 12 – Measuring conditions for the distance of the 3D virtual object . 21
Figure 13 – Three images captured by three imaging LMDs for the 3D virtual object
located at the back of the virtual plane . 22
Figure 14 – Measuring location representation in the eye-box . 23
Figure 15 – Measuring condition for luminance and chromaticity from the centre point
in the eye-box . 25
Figure A.1 – Example of 3D displays. 29
Figure B.1 – Illustration of the measurement concept applied for this documenta . 32
Figure B.2 – Illustration of the measurement concept applied for ISO 9241-305:2008,
6.11.1 [5] . 33
– 4 – IEC 62629-62-11:2022 © IEC 2022
Figure B.3 – Illustration of the measurement concept applied for SAE J 1757-2 [3] . 33
Figure C.1 – Limit in the determination of the location of a 3D virtual object using two
imaging LMDs . 34
Figure C.2 – Determination of the location of a 3D virtual object using three imaging
LMDs . 35
Figure C.3 – World, imaging LMD and 2D image (pixel) coordinates for calibration . 37
Figure D.1 – Example of luminance profile created by four perspective images . 38
Figure D.2 – Measuring layou
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