TECHSPEC® Calcium Fluoride Windows

  • Greater than 90% Transmission from 250nm-7μm
  • Low Index of Refraction

Calcium Fluoride is often used in spectroscopic windows and lenses due to its high transmission from 250nm to 7μm. Calcium Fluoride is also commonly found in cryogenically cooled thermal imaging systems. Its low absorption and high damage threshold makes it a popular choice for excimer laser optics. Calcium Fluoride's low refractive index allows it to be used without an antireflective coating. The Knoop hardness of Calcium Fluoride is 158.3.

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Description Stock No. Price In Stock  
Showing 1-9 of 9 Items | Sort by Spec
5mm Dia. Calcium Fluoride Window, Uncoated
NT48-853 $69.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 5.00
Thickness (mm) 1.00
RoHS Exempt
10mm Dia. Calcium Fluoride Window, Uncoated
NT47-681 $79.00 Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 10.00
Thickness (mm) 1.50
RoHS Exempt
12.5mm Dia. Calcium Fluoride Window, Uncoated
NT47-682 $85.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 12.50
Thickness (mm) 2.00
RoHS Exempt
15mm Dia. Calcium Fluoride Window, Uncoated
NT48-854 $89.00 Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 15.00
Thickness (mm) 2.00
RoHS Exempt
25mm Dia. Calcium Fluoride Window, Uncoated
NT47-683 $99.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 25.00
Thickness (mm) 3.00
RoHS Exempt
50mm Dia. Calcium Fluoride Window, Uncoated
NT47-684 $199.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 50.00
Thickness (mm) 3.00
RoHS Exempt
20mm Dia. Calcium Fluoride Window, Uncoated
NT63-207 $95.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 20.00
Thickness (mm) 2.00
RoHS Exempt
30mm Dia. Calcium Fluoride Window, Uncoated
NT63-208 $129.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 30.00
Thickness (mm) 3.00
RoHS Exempt
40mm Dia. Calcium Fluoride Window, Uncoated
NT63-209 $149.00 Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 40.00
Thickness (mm) 3.00
Coating 3.00
RoHS Exempt
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Material CaF2 (Vacuum UV Grade)
Clear Aperture 90% of Diameter
Dimensional Tolerance +0.0/-0.1mm
Thickness Tolerance ±0.1mm
Surface Quality 40-20
Surface Accuracy 1/2 λ @ 632.8nm
Parallelism <1 arcmin
Coating None

View Calcium Fluoride Transmission Curve

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