In the range of 2-12 μ m, germanium is the most commonly used material for making optical lens and optical window in high-efficiency infrared imaging system. Germanium has the characteristics of high refractive index (about 4.0 at 2-12μ m band), small surface curvature and color difference.
Opticreate produces high-precision germanium window and lens, could do AR coating and DLC (Diamond like carbon) coating according to customers' requirements
Material | Ge |
Diameter tolerance | +0.0/-0.05mm |
Diameter | D2-D300mm |
Focal length tolerance | ±2%(for lens) |
Centration | ≤0.01mm(high precision 0.005mm) |
Power | 1λ |
Irregularity | λ/4 |
Surface Quality | 40-20 |
Bevel | 0.25 mm × 45° |
Coating | AR Coating,DLC coating(Diamond like carbon) |