N-BK7 Optical borosilicate-crown glass from SCHOTT

N-BK7 Optical borosilicate-crown glass from SCHOTT bk7 slot BK7 optical glass OPTIMUM TRANSMISSION RANGE 350nm bk77 slot explore #สล็อตbk7 at Facebook

bk7 slot N-BK7 is a Schott designation for the most common Borosilicate Crown glass used for a wide variety of visible applications