Optical Properties

Optical Properties

Massive borosilicate glass 3.3 has a high ability to transmit light throughout the visible range of the spectrum. Ranging from approx. 320 to 2400 nm there is virtually no absorption through the thickness of glass generally encountered in laboratory glassware (up to approx. 6mm). The following table shows additional data:


Refractive index (sodium D line) 1.474
Dispersion (nf-nc)  0.00738
Visible light transmission                 

92% in 2 mm thick glass

91% in 6 mm thick glass

Stress optical coefficient               4.0 ⋅ 10-6 mm2 ⋅ N-1