Borosilicate -BK7
Borosilicate Glass (BK7) is a high-quality optical crown glass known for its excellent visible light transmission, low bubble/inclusion content, and superior chemical and thermal stability. With a typical transmission range from 350 nm to 2.5 µm, BK7 is ideal for laboratory optics, imaging systems, and general-purpose optical components. At Global Optics UK, we supply precision-fabricated BK7 windows, lenses, prisms, and blanks, with custom sizing, polishing, and coating options available to meet your exact specifications.
Learn more about more optical materials including:
Quartz
Sapphire
Fused Silica
FAQ
FAQ
Q: What is Borosilicate Glass used for?
A: Borosilicate is used in laboratory optics, precision lenses, lighting systems, cookware, and glassware. It offers excellent thermal shock resistance and chemical durability.
Q: Is Borosilicate Glass suitable for high-temperature applications?
A: Yes, borosilicate can withstand temperatures up to ~500 °C and has a low thermal expansion (~3.3 × 10⁻⁶ /°C), making it ideal for labware and optical components.
Q: Does Borosilicate resist chemical corrosion?
A: Yes, it is highly resistant to most acids, alkalis, and solvents, making it suitable for harsh chemical environments.
Q: Is Borosilicate optically transparent?
A: Absolutely. It has excellent optical clarity in the visible range (roughly 300–2500 nm) and is commonly used in optics and lighting.
Q: Where can I find the technical datasheet?
A: You can download the Borosilicate datasheet here.