Polished Small Diameter Optical
Windows 
Small diameter optical windows with diameter tolerances better than .05mm are available as thin as 25 microns in numerous materials. Polished windows are polished all the way to the edge with no drop off. These are also available with AR or metal coatings for applications such as optical filters.
Some of the more common materials used for small optical windows include:
OPTICAL MATERIALS
-
BK7 Glass
-
Fused Silica
-
Fused Quartz
-
IR Grade Fused Silica
-
UV Grade Fused Silica
-
Pyrex 7740
-
Silicon
-
Sapphire
