Double glass light transmission component parameters

What is the typical transmittance range of optical glasses?

Optical glasses are optimized to provide excellent transmittance throughout the total visible range from 400 to 800 nm. Usually the transmittance range spreads also into the near UV and IR regions.

Do optical glasses have a high transmittance?

Optical glasses are optimized to provide excellent transmittance throughout the total visible range from 400 to 800 nm. Usually the transmittance range spreads also into the near UV and IR regions.

What is the difference between light transmittance and light reflectance?

Light transmittance – the proportion of the light that is transmitted by the glass. Light reflectance – the proportion of the light that is reflected by the glass. Total shading coefficient – the ratio between total solar heat transmittance of the glass and that of a single 3 mm thick clear float glass.

Do low index glasses show high transmittance?

Lowest refractive index glasses show high transmittance far down to short wavelengths in the UV. Going to higher index glasses, the UV absorption edge moves closer to the visible range.

How does spectral transmittance affect refractive index?

In the main spectral transmittance region the refractive index increases towards shorter wavelength. The dotted line shows the absorption coefficient k as a function of the wavelength. Figure 2-1: Measured optical constants of fused silica (SiO2 glass). The influence of the UV-edge on the refractive index is clearly visible.

Which glasses have high transmittance in the UV region?

Lowest refractive index glasses show high transmittance far down to short wavelengths in the UV. As a general trend, going to higher index glasses the UV absorption edge moves closer to the visible range.