What is the transmittance of a float glass?

The research shows that the transmittance of the glass thickness is less than 0.9 mm, undergone the chemical strengthening process, reaches 91-92% values in whole UV-VIS-NIR region. For comparison, results for a float type glass (3 mm) shows a value about 80% in UV-VIS radiation range and about 60% above 1000 nm. Trans- mission over [...]

How is the transmittance of optical glass measured?

The transmittance of optical glass is measured using double beam spectral photometers from the company Perkin Elmer with special modifications. The standard setup enables to measure within a wavelength region from 250 nm up to 2500 nm. The measurement accuracy over the complete spectrum is about ±0.5%.

What is the transmittance spectra of quartz glass slabs?

Spectral transmittance values of quartz glass slabs. As shown in Fig. 2, the shapes of transmittance spectra between 3 and 5 mm quartz glass slab are similar. And the float glass slabs have a wide transparent region, especially in the visual region 380–760 nm, in which the transmittances of float glass slab are beyond 78%.

How does electromagnetic radiation affect the transmittance of a glass?

Electromagnetic radiation influences the transmittance of a glass depending on glass type and the wavelength of radiation. The influence of visible and UV radiation (less than 380 nm wavelength) on glass is called solarization. The UV radiation generates color-centers in the glass leading to a reduced transmittance.

Which spectrometer is used to measure the transmittance of glass?

Transmittance parameter was measured using UV-VIS- NIR spectrometer. These measurement results are pro- vided in Fig. 3. The research shows that the transmittance of the glass thickness is less than 0.9 mm, undergone the chemical strengthening process, reaches 91-92% values in whole UV-VIS-NIR region.

Can transmittance spectrograms be used to determine optical properties of single glazing units?

In this work, transmittance spectrograms of single glazing units at normal incidence were only measured, and a novel spectroscopic method was developed to determine the optical properties of single and double glazing units based on the transmittance spectra modeling.