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BS IEC 62906-5-5:2022

BS IEC 62906-5-5:2022

$189.07

Laser displays – Optical measuring methods of raster-scanning retina direct projection laser displays

Published By Publication Date Number of Pages
BSI 2022 50
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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
11 4 Standard measuring conditions
4.1 Standard measuring environmental conditions
4.2 Coordinate system
12 4.3 Standard conditions of RS-RDP laser displays and light measuring devices
4.3.1 General
4.3.2 Adjustment of RS-RDP laser display
4.3.3 Requirements for light measuring device
Figures
Figure 1 – Coordinate system and setup for planar measurements
14 4.4 Laser-safety requirements for measurement
5 Optical measuring methods
5.1 General
5.2 Optical power at the primary colour wavelength
5.2.1 General
15 5.2.4 Elimination of the effect of other spectral powers
16 5.3 Eye-box
5.3.1 General
Figure 2 – Two measurement points of optical power
17 5.3.2 Eye-box measurement by 2D image sensor
5.3.3 Eye-box measurement by goniometric spectroradiometer
18 5.4 Field of view
5.4.1 General
5.4.2 FOV measurement by 2D image sensor
Figure 3 – Measurement geometry of the eye-box
19 5.4.3 FOV measurement by goniometric spectroradiometer
5.5 Aspect ratio
Figure 4 – Measurement geometry of the FOV
20 5.6 Effective angular image resolution
5.6.1 General
Figure 5 – Example of beam waist for Maxwellian view at the 2D image sensor plane
21 5.6.2 Measuring methods of effective angular image resolution
Figure 6 – Example of measurement locations for effective angular image resolution
22 Figure 7 – Setup for measuring effective angular image resolutionand retinal free focus range
23 Figure 8 – Test patterns for resolution measurement
24 5.7 Retinal free focus range
5.7.1 General
Figure 9 – Example of contrast modulation plot
25 5.7.2 Retinal free focus range measured by direct method
26 5.7.3 Retinal free focus range measured by imaging method
5.8 Retinal white illuminance
5.8.1 General
Figure 10 – Example of the measured results of retinal free focus range
27 5.8.2 Retinal white illuminance measurement using the method in 5.2.3
5.8.3 Retinal white illuminance measurement using spectral irradiance meter
5.9 Luminance and chromaticity of virtual image
5.9.1 General
5.9.2 Measurement procedure
28 5.10 White chromaticity nonuniformity
5.10.1 General
5.10.2 White chromaticity nonuniformity
5.10.3 Virtual image chromaticity nonuniformity
29 6 Report
Figure 11 – Nonuniformity measurement locations and box patterns
30 Annex A (informative)Structure of RS-RDP laser displays
A.1 General
A.2 Example of mechanical structure
A.3 Example of fundamental electro-optical structure of RS-RDP laser display
Figure A.1 – Example of mechanical structure of RS-RDP laser display
31 Figure A.2 – Example of electro-optical structure of RS-RDP laser display
32 Annex B (informative)Maxwellian view of RS-RDP laser displays
B.1 General
B.2 Maxwellian view
Figure B.1 – Maxwellian view (a) and normal viewing (b)
33 B.3 Pinhole image on the retina in the Maxwellian view
B.4 Laser image on the retina in the Maxwellian view
Figure B.2 – Pinhole (a) and laser beam (b) in the Maxwellian view
34 Annex C (informative)Eyeball model and use of planar 2D sensor for measuring optical property
C.1 Human eyeball structure, its optics and modelling for practical measurement
Figure C.1 – Cross-sectional human eyeball structure
35 Figure C.2 – Schematic of the eye with geometrical and optical information
Figure C.3 – Calculated refracted beam angle in the eye with respect to incident beam angle for blue (465 nm), green (520 nm) and red (640 nm)
37 Figure C.4 – Schematic eye optics
38 C.2 Retinal sensor model
Figure C.5 – Example of beam spot radius calculation for the eye modelas a function of incident beam diameter
39 C.3 Optical measuring method with planar 2D image sensor
Figure C.6 – Retinal sensor model with curved 2D image sensor
40 Figure C.7 – Geometrical relationship between point A on the retina and Bon the fovea plane for the Cartesian coordinate system
Figure C.8 – Cross-sectional view of the plane consisting of the z-axisand the line segment OB in Figure C.7
41 Figure C.9 – Schematic diagrams of human eye
44 Figure C.10 – Geometrical relation of points A, B, C, and D
45 Annex D (informative)Comparison of retinal illuminance with other displays
D.1 Projected area on retina
46 Figure D.1 – Projected area on the spherical retina
Figure D.2 – Spherical cap cut off by a circular plane,3D-view (a) and y-z cross-section (b)
47 D.2 Retinal illuminance estimation for the conventional displays using natural viewing
Figure D.3 – Strip-shaped region Sv cut off by the two spherical caps
48 D.3 Retinal illuminance estimation for RS-RDP laser display using Maxwellian viewing
D.4 Comparison of retinal illuminance between RS-RDP laser displays and the conventional displays
49 Bibliography

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BS IEC 62906-5-5:2022
$189.07