BK7 and K9 optical glass are versatile materials suitable for a wide range of optical applications, thanks to their excellent optical properties, stability and machinability.One of the most common applications of BK7 and K9 optical glass is in optical instruments such as cameras, microscopes, telescopes and binoculars. In cameras, they are used to make lenses that capture clear and sharp images. I...

BK7 and K9 optical glass are the most popular choices in the optical industry, thanks to a range of key advantages that make them suitable for countless applications worldwide.First and foremost, they feature excellent optical clarity with a visible light transmittance of over 91%, which ensures that light passes through the material with minimal loss. This high transmittance is critical for appli...

BK7 and K9 are the two most widely used optical glass materials in the global optical industry, often seen as interchangeable alternatives. Many customers ask about their differences, so let’s break down the key similarities and distinctions clearly.BK7, also known as borosilicate crown glass, is a European standard optical glass defined by ISO and DIN specifications. It is manufactured under stri...