IEC 63145-22-20:2020(E) specifies the standard measurement conditions and measuring methods for determining the see-through optical properties and imaging quality of augmented reality (AR) eyewear displays. This includes the transmission characteristics and ambient optical performance of the eyewear displays.
Contact lens type displays are out of the scope of this document.
NOTE The relationship between the scope and other documents (IEC 63145-20-10, IEC 63145-22-10) is shown in Annex A.

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IEC 63145-20-20:2019 (E) specifies the standard measurement conditions and measurement methods for determining the image quality of eyewear displays. This document is applicable to non-see-through type (virtual reality “VR” goggle) and see-through type (augmented reality “AR” glasses) eyewear displays using virtual image optics.
Contact-lens type displays and retina direct projection displays are out of the scope of this document.

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IEC 63145-20-10:2019(E) specifies the standard measurement conditions and measurement methods for determining the optical properties of eyewear displays. This document applies to non-see-through type (virtual reality “VR” goggles) and see-through type (augmented reality “AR” glasses) eyewear displays using virtual image optics.
Contact lens-type displays and retina direct projection displays are out of the scope of this document.

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This part of IEC 62788 provides a method for measurement of the optical transmittance of
encapsulation materials used in photovoltaic (PV) modules. The standardized measurements
in this procedure quantify the expected transmittance of the encapsulation to the PV cell.
Subsequent calculation of solar-weighted transmittance allows for comparison between
different materials. The results for unweathered material may be used in an encapsulation
manufacturer’s datasheets, in manufacturer’s material or process development, in
manufacturing quality control (material acceptance), or applied in the analysis of module
performance.
This measurement method can also be used to monitor the performance of encapsulation
materials after weathering, to help assess their durability. The standardized measurements
are intended to examine an interior region within a PV module, e.g., without the effects of
oxygen diffusion around the edges of the cells. Subsequent calculation of yellowness index
allows for quantification of durability and consideration of appearance. The change in
transmittance, yellowness index, and ultraviolet (UV) cut-off wavelength may be used by
encapsulation or module manufacturers to compare the durability of different materials.

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