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Calcium fluoride (CaF₂) Windows/Lenses

Material:
UV Grade CaF₂, IR grade CaF₂

Thickness:
+/-0.2mm

Surface Flatness:
N<λ/8

Coating:
Uncoated

Diameter Tolerance:
+0.0,-0.1mm

Surface Quality:
60/40~20/10

Parallelism:
<10”

Calcium fluoride (CaF₂) Windows provide high transmission from the ultraviolet (180 nm) to the infrared (8 μm).Calcium fluoride has a low absorption coefficient and high damage threshold, making these windows a good choice for use with free-space lasers. Optical calcium fluoride offers low dispersion (with an Abbe Number of 95) and low fluorescence, as well as excellent water, chemical, and heat resistance. In dry environments, CaF2 can be used up to 1000 °C, but in the presence of moisture, degradation will occur for temperatures exceeding 600 °C. Each window has a randomly oriented crystal axis.
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