Specifications:
| Materials | Hot-pressed MgF2 | Diameter Range | ~ 280mm |
| Thickness Tolerance | +/-0.2mm (Optional:+/-0.1mm and +/-0.05mm) | Surface Quality | 60/40 S/D |
| Frings (N) | customized | Irregularity (delta N) | customized |
| Chamfer | 0.1~0.3mmx45degree | Coating | Uncoated (Note: coating is unnecessary for its high transmission) |
Physical and Optical Properties:
| Transmission Range | 0.7 to 9μm | Knoop Hardness | >539kg/mm2 |
| Fracture Strength | 96MPa | Compression Strength | >300MPa |
| Bending Strength | >90MPa | Density | >3.17g/cm3 |
| Thermal Expansion | <1.3x10-5K-1(25-300℃) | Refractive Index | 1.3812+/-0.005 (at 0.5893μm) |
| Transmittance | >85%(2-7.5μm) |
Hot-pressed Polycrystalline Zinc Sulphide is a kind of infrared optical material with a wide transmittance range. HP ZnS is made from high pure zinc sulphide raw material under vacuum and high temperature condition,which has good infrared transmission and thermal property and high impact overloading resistance. Since it can be directly pressed into large size plates and spherical dome windows with various curvature radius, HP ZnS has been widely used to make infrared detector dome windows for defenses, security and aerospace applications.
1.Transmission of Hot-pressed domes without coating
