CAW18 Optical Window

The CAW18 is a 40.0 mm in diameter and 3.0 mm thick Calcium Fluoride window. Calcium fluoride has a wide spectral range with high transmission (above 90%) between 0.25 μm and 7 μm, making it an excellent choice for deep UV to IR applications. CaF₂ is also an ideal choice for excimer laser optics due to its low absorption and high damage threshold. For selected applications CaF₂ can also be used without an anti-reflective coating as it has a low index of refraction leading to a low refracted light from the second surface.

Specifications

Technical Specs

Diameter

40.0 mm
Material

Vacuum UV Grade Calcium Fluoride
Antireflection Coating

Uncoated
Surface Flatness

λ/2 @ 632.8 nm
Surface Quality

40-20 scratch-dig
Thickness

3.0 mm
Thickness Tolerance

± 0.1 mm

Parallelism

< 1 arc minute
Cleaning

See How to Clean Optics
Clear Aperture

Central 90% of diameter
Diameter Tolerance

+0.0/-0.1 mm
Wavelength Range

250-7000 nm

Diameter

40.0 mm
Material

Vacuum UV Grade Calcium Fluoride
Antireflection Coating

Uncoated
Surface Flatness

λ/2 @ 632.8 nm
Surface Quality

40-20 scratch-dig
Thickness

3.0 mm
Thickness Tolerance

± 0.1 mm

Parallelism

< 1 arc minute
Cleaning

See How to Clean Optics
Clear Aperture

Central 90% of diameter
Diameter Tolerance

+0.0/-0.1 mm
Wavelength Range

250-7000 nm

Resources & Downloads

Drawings And Cad

90040232A.pdf (65.7 kB, PDF)

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Optical Window, Calcium Fluoride, 40.0 mm Dia., 3.0 mm thick, Uncoated