K9 Windows
The window is a transparent protective window that allows light to enter from one environment to another different environment. Different temperatures, pressures, chemical compositions or cleanliness will affect its light projection. High transmittance and low refraction can be achieved through coating, allowing light to pass as much as possible.
K9 (BK7) is a common borosilicate glass with a transmission range of 350nm~2100nm. It has high homogeneity and low content of bubbles and impurities. It can be directly used as a material for transmission optics. Due to its stable chemical properties and high hardness, it can be used to make various optical components from visible light to near infrared, such as flat windows, lenses, prisms, etc. These components are widely used in optoelectronics, microwave technology and other fields.
Technical Indicators
Material: H-K9L
Processable size: 5-800mm
Outer tolerance: +0.0/-0.05mm
Thickness tolerance: ±0.1mm
Surface shape: λ/2; λ/4; λ/8; λ/10; λ/20; λ/30 (Customization)
Parallelism: <10″
Smoothness: 40-20; 20-10; 10-5 (Customization)
Effective aperture: >90%
Chamfer: <0.2×45°
Coating: AR
A: 350nm-650nm
B: 650nm-1050nm
C: 1050nm-1580nm
Common Specifications and Dimensions Table
| Diameter (mm) | Thickness (mm) | Surface Accuracy | Parallelism |
|---|---|---|---|
| 12.7 | 3 | λ/10 | ≤10″ |
| 20 | 3 | λ/10 | ≤10″ |
| 20 | 4 | λ/10 | ≤10″ |
| 25.4 | 3 | λ/10 | ≤10″ |
| 25.4 | 5 | λ/10 | ≤10″ |
| 30 | 5 | λ/10 | ≤10″ |
| 50 | 5 | λ/10 | ≤10″ |
| 50.8 | 5 | λ/10 | ≤10″ |
| 76.2 | 10 | λ/10 | λ/10 |
| 100 | 10 | λ/10 | ≤10″ |
The above stock sizes are for you to choose. If you need bulk customization, please contact our sales team.
