BK7 is a very, if not the most, common technical optical glass for high quality optical components in the visible range. BK7 is a relatively hard bor-crown glass and shows a good scratch resistance. BK7 has a very low amount of inclusions and is almost bubble-free. Another reason for choosing BK7 is the high linear optical transmission in the visible range down to 350nm. Because of stable chemical properties of BK7, no special treatment is required to grind and polish the material. BK7 is produced in strips and blocks up to about 350mm wide and about 70mm thick and can be fabricated to any smaller size. Larger BK7 strips and dimensions are available on request.
To request windows or substrates made of Schott BK7 Glass with your individual dimensions, please click the button below:
Further detailed specifications on request.