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All Products / Optics / Windows and Diffusers / UV and IR Windows / ISP Optics Calcium Fluoride (CaF2) Windows
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38.1mm Dia., 4mm Thick, Uncoated, ISP Optics Calcium Fluoride (CaF2) Window | CF-W-38-4

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Abbe Number (vd):
94.99
Axis Orientation:
Random
Bevel:
Protective as needed
Clear Aperture (%):
85
Clear Aperture CA (mm):
32.38
Diameter (mm):
38.10 +0.00/-0.13
Thickness (mm):
4.00 ±0.13
Coating:
Uncoated
Coefficient of Thermal Expansion CTE (10-6/°C):
18.85
Density (g/cm3):
3.18
Edges:
Fine Ground
Index of Refraction nd:
1.434
Knoop Hardness (kg/mm2):
158.3
Parallelism (arcmin):
<3
Poisson's Ratio:
0.26
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Calcium Fluoride (CaF2)
Surface Flatness (P-V):
2λ
Surface Quality:
40-20
Type:
Protective Window
Wavelength Range (nm):
300 - 8000
Young's Modulus (GPa):
75.8
Model Number:
CF-W-38-4

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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Reach 240:
Compliant
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Product Family Description

  • Greater than 90% Transmission from 350nm-7μm
  • Low Index of Refraction
  • Low Solubility and Chemically Inert

ISP Optics Calcium Fluoride (CaF2) Windows provide environmental protection for electronic systems and sensors across the IR spectrum. Calcium Fluoride features greater than 90% transmission from 350nm to 7μm and a low refractive index, allowing it to be used without an anti-reflection (AR) coating. These windows are fabricated with IR Grade Calcium Fluoride, featuring low absorption and a high damage threshold in the infrared spectrum. ISP Optics Calcium Fluoride (CaF2) Windows offer low solubility and superior hardness compared to other fluoride-based substrates, making them ideal for applications featuring harsh environments including infrared spectroscopy systems and thermal imaging.