Technical FAQs 4

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

Visible light reflectance, front: the fraction of visible light reflected by the front side of a glass. Visible light reflectance, back: the fraction of visible light reflected by the back side of a glass. Solar energy transmittance: the fraction of solar energy transmitted through a glass.

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 the difference between visible transmittance and visible reflectance?

Visible transmittance (τv) and visible reflectance (ρv) refer to the ratio of the beam of visible light vertically incident on a glass surface to the incident beam of transmitted light or reflected light.

What is visible light transmittance (VLT)?

Visible light transmittance (VLT) is a percentage of the visible portion of the solar energy spectrum coming through the glass. It is expressed as a figure between 0 (no light) and 100 (all light). This value measures the ability of the glass to transmit light and facilitate daylighting.

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What is the light transmittance of solar glass

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Light transmittance (LT) and solar factor (Sg) are closely related . When we are looking for high-performance glazing, particularly to reduce summer overheating, we look for a low solar factor.

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