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What (who) is BK7 - definition
BK7
N-BK7 anciennement BK7 est l'appellation commerciale de Schott AG donnée au verre borosilicate crown le plus utilisé pour des applications dans le spectre visible et l'infrarouge proche. Le BK7 est devenu N-BK7 à la suite d'un changement de composition du verre de manière à le rendre moins dangereux pour l'environnement.
