I would like to use sapphire window in an instrument measuring fluorescence of a fluid in a well. The excitation light would pass through the sapphire window. How much will the sapphire fluorescence compared to fused silica or optical glasses?
Sapphire as material can has any traces of Cr and Ti (3+). But the concentration of these impurities is very small. You can measure the fluorescence of sapphire at first and then the fluorescence your samples through sapphire window. As to fused silica or optical glasses — it will be depend from raw material quality too.
<<< back to Frequently Asked Questions List