BK7 vs K9 Optical Glass Dome: What’s the Difference
When selecting protective optical components, BK7 and K9 optical glass domes are the two most common glass dome materials chosen by industrial and optical equipment manufacturers.
Both BK7 and K9 optical glass domes feature high light transmittance, stable internal structure and low impurities. The uncoated optical glass dome can reach over 91% transmittance, meeting daily optical protection and light transmission needs. In most general scenarios, BK7 and K9 glass dome can be used interchangeably.
K9 optical glass dome owns higher surface hardness and better scratch resistance, ideal for outdoor monitoring, camera protection and harsh working environments. BK7 optical glass dome provides excellent chemical stability and low thermal expansion, perfect for laboratory instruments, medical optics and indoor precision equipment.
Felix Glass supplies high-quality BK7 & K9 optical glass domes with customized size, curvature and surface treatment.
If you're unsure whether BK7 or K9 optical glass dome is the best fit for your project, contact our team with your application details. We'll help you choose the right material and provide a customized quote.
