CaF₂ (Calcium fluoride) optical window for use in FTIR spectroscopy.

• Multi-purpose window for use in UV/VIS and FTIR spectroscopy
• Circular shape
• Large transmission range of 130 nm to 9.5 μm
• Great for use in laser and cryogenic applications
• High damage threshold

Low index of refraction and low absorbance coefficient.

Surface quality: 60/40 scratch dig
Tolerance: Diameter - ±0.1 mm; Thickness - ±0.2 mm
Aperture: 90% (clear aperture)

Melting point: 1360 °C
Parallelism: <1 arc min
Density: 3.18 g/cm³

Young's Modulus: 75.8 (Gpa)
Knoop Hardness: 158.3 kg/mm²
Coefficient of Thermal Expansion: 18.85×10⁻⁶/°C