Technical FAQs 4

What is visible light transmittance?

Visible Light Transmittance (Tv, %) is the percentage of incident light in the wavelength range of 380 nm to 780 nm that is transmitted by the glass. Visible Light Outdoors/Indoors (Re out/in, %) is the percentage of incident solar energy directly reflected by the glass.

What is solar energy direct transmittance (Te)?

Solar Energy Direct Transmittance (Te, %) is the percentage of incident solar energy in the wavelength range of 300 nm to 2500 nm that is directly transmitted by the glass. Solar Direct Reflectance Outdoors/Indoors (Re out/in, %) is the percentage of incident solar energy directly reflected by the glass.

What is the difference between visible light transmittance and visible light reflectance?

Visible Light Transmittance (Tv, %) is the percentage of incident light in the wavelength range of 380 nm to 780 nm that is transmitted by the glass. Visible Light Reflectance Outdoors/Indoor (Rv out/in, %) is the percentage of incident visible light directly reflected by the glass.

What is UV transmittance (TUV)?

Ultraviolet (UV) Transmittance (Tuv, %) is the percentage of the incident UV component of the solar radiation in the wavelength range of 280 nm to 380 nm that is transmitted by the glass.

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Light transmittance standard version solar glass

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Solar Glass

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ISO

Nov 1, 2023 · This document specifies a test method of light transmittance for the laminated solar photovoltaic glass for use in building. This document is applicable to flat modules with light

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Oct 9, 2024 · Glass in building — Laminated solar photovoltaic glass for use in buildings — Light transmittance measurement method Verre dans la construction — Verre feuilleté

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4 days ago · Based on these transmittance spectra, solar transmittance measurement software was used to calculate solar transmittance and

Standard

This document specifies a test method of light transmittance for the laminated solar photovoltaic glass for use in building. This document is applicable to flat modules with light transmittance in

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Explanation of terms according to JIS R 3106: 1998 JIS R 3107: 1998. Visible Light Transmittance (Tv, %) is the percentage of incident light in the wavelength range of 380 nm to 780 nm that is

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ISO 23237:2023

Nov 25, 2023 · INTERNATIONAL STANDARD ISO 23237 First2023-11 Glass in building — Laminated solar photovoltaic glass for use in buildings — Light transmittance measurement

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ISO 9050:2003

Nov 22, 2025 · Glass in building — Determination of light transmittance, solar direct transmittance, total solar energy transmittance, ultraviolet transmittance and related glazing

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