BK7 Optical Glass is a high-borosilicate crown glass with excellent transmittance (>90%) and low dispersion in the visible and near-infrared spectrum (380–2100 nm), making it ideal for lenses, prisms, and windows. It is highly resistant to scratches but has a relatively high thermal expansion coefficient, making it unsuitable for environments with significant temperature fluctuations.
Key Parameters
- Transmittance: >90% (visible light)
- Spectral Range: 380–2100 nm
- Thermal Expansion Coefficient: Relatively high (not recommended for temperature-sensitive applications)
- Hardness: High (scratch-resistant)
Typical Applications
- Optical Instruments: Microscopes, telescopes, camera lenses
- Laser Technology: Windows and prisms for low-power lasers (≤500W)
- Industrial Equipment: Optical measurement devices, sensors
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