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Hot-pressed MgF2 Domes

  • Large Flexural strength: > 20,000 psi
  • Large Knoop hardness: >1350 kg mm-2
  • High transmission at 2μm to 7.5μm 
  • Fit for MWIR region thermal imaging
  • Excellent for defense, security and aerospace application
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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 <1.3x10-5 K-1(25-300℃) Refractive Index 1.3812+/-0.005 (at 0.5893μm)
Transmittance >85%(2-7.5μm)

Hot-pressed magnesium fluoride or MgF2 domes for missiles and launch tubes is provided, which has high ultraviolet transmittance and high strength properties. It is mainly used as mid-infrared wave window material to produce mid-infrared wave vector domes. With its high infrared transmittance, small thermal expansion coefficient, good mechanical property, and low preparation cost, hot-pressed MgF2 is regarded as the best materials for mid-infrared wave vector dome.

Transmission of Hot-pressed MgF2 Materials