Overview
IEC 63145-22-20:2024 - Eyewear display, Part 22-20 - specifies standardized measuring conditions and measurement methods for assessing image quality of AR (augmented reality) see-through eyewear displays that use virtual image optics. The edition incorporates Corrigendum 1 (2024-09). It applies specifically to AR glasses (see‑through type) and explicitly excludes contact‑lens type displays, retina direct‑projection systems and non‑see‑through VR headsets.
Key topics and technical requirements
This standard defines a comprehensive test framework covering:
- Standard measuring conditions: environment, power supply, warm‑up time and dark‑room conditions to ensure repeatable results.
- Measurement systems and coordinate setups: standard spherical and Cartesian coordinate systems, and requirements for measurement equipment such as Light Measuring Devices (LMDs) and stage/setup conditions.
- Background and see‑through scene conditions: procedures for ambient background, diffuse illumination and specific test targets (raster/grille and crosshair patterns).
- Virtual image test patterns: checkerboard, solid colour, and raster patterns, plus defined measuring points across the virtual image.
- Image quality measurement methods:
- Luminous and spectral transmittance with ambient diffuse illumination
- Ambient contrast ratio and Michelson contrast
- Chromaticity, gamut area and spectral measurements
- Static image resolution (spatial resolution metrics)
- Secondary image effects (ghosting, reflections)
- Temporal behaviour and flicker, including temporal contrast sensitivity considerations
- See‑through real‑scene parameters: field of view (FOV) measurement, luminance and chromaticity variation, rectangular and local geometric distortion, and monocular positioning accuracy.
- Reporting: standardized calculations and reporting requirements are specified to support comparability.
Normative references include IEC 63145 series fundamentals and relevant ISO/CIE colorimetry standards (e.g., ISO/CIE 11664, CIE 015).
Practical applications - who uses this standard
IEC 63145-22-20:2024 is intended for:
- AR eyewear manufacturers validating optical and image quality performance.
- Independent test laboratories performing compliance and benchmark testing.
- R&D and optical engineers optimizing virtual image optics and display modules.
- UX and systems integrators verifying legibility, contrast and chromatic fidelity in real‑world scenes.
- Procurement, certification and regulatory bodies seeking standardized test evidence for product comparisons.
Use cases include product development, pre‑production verification, performance claims substantiation, competitive benchmarking and supplier qualification.
Related standards
Keywords: IEC 63145-22-20:2024, eyewear display, AR image quality, measurement methods, see‑through AR, virtual image optics, LMD, FOV, chromaticity, contrast, resolution.