High-Precision K9 (BK7) Optical Glass Windows & Components
K9 glass, also known as BK7 glass, is the most widely used high-quality optical borosilicate glass for visible and near-infrared applications. Renowned for its excellent homogeneity, low bubble content, and superior physical properties, K9 glass is the “gold standard” for precision optics.
At YOUJIA OPTICAL, we provide custom-sized K9 glass substrates, windows, and lenses with advanced laser cutting and CNC polishing to meet your specific project requirements.
Technical Specifications (K9 / BK7 Equivalent)
Our K9 glass components are manufactured to strict optical standards. Below are the key physical and optical parameters:
| Parameter | Value / Range |
|---|---|
| Material | K9 / BK7 Optical Borosilicate Glass |
| Refractive Index (nd) | 1.5168 |
| Abbe Number (vd) | 64.17 |
| Transmission Range | 350nm – 2000nm |
| Surface Quality | 20/10, 40/20, 60/40 (Scratch/Dig) |
| Surface Flatness | λ/4, λ/10 per 25mm |
| Dimensional Tolerance | ± 0.05mm (High Precision) |
| Available Coatings | Uncoated, AR, BBAR, Mirror Coating |
Key Applications
- Laser Systems: Protective windows and beam splitters.
- Imaging Optics: High-transmittance substrates for industrial cameras and delivery drones.
- Scientific Instruments: Precision prisms and laboratory optical flats.
- Optoelectronics: Components for sensors and measurement devices.
Precision laser cutting process of a 2mm K9 glass array at YOUJIA OPTICAL facility, ensuring zero-edge-crack and high dimensional tolerance for drone camera lenses.
Why Choose YOUJIA OPTICAL?
“Precision is our core. From raw material selection to the final polish, we ensure every piece of K9 glass meets international optical standards.”
- Advanced Cutting Technology: Minimized edge chipping (as demonstrated in our processing videos).
- Custom Geometries: Support for round, square, and complex R-angle shapes.
- Strict QC: 100% inspection for surface flatness and transmission efficiency.
Frequently Asked Questions (FAQ)
Q: What is the difference between K9 and Fused Silica (JGS1)?
A: K9 glass is cost-effective and excellent for visible light (350nm+). Fused Silica (JGS1) is better for deep UV applications and high-temperature environments. K9 is usually the preferred choice for general precision optics due to its balance of performance and price.
Q: Can you provide custom AR coatings?
A: Yes, we provide in-house AR coating services to increase light transmission to over 99% for specific wavelength ranges.
Request a Quote for K9 Glass
Looking for a reliable supplier with factory-direct pricing? Our engineering team is ready to assist with your technical drawings.
Email: [email protected]
Official Website: www.youjiaoptical.com
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