Compare Model Drawings, CAD & Specs Material Diameter Thickness Surface Flatness Parallelism Availability Price
$276
In Stock
IR Grade Calcium Fluoride 25.4 mm 2.0 mm λ/20 @ 10.6 µm < 3 arc minute
In Stock
$226
In Stock
IR Grade Calcium Fluoride 25.4 mm 3.0 mm λ/20 @ 10.6 µm < 3 arc minute
In Stock
$92
In Stock
Vacuum UV Grade Calcium Fluoride 5.0 mm 1.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
$106
In Stock
Vacuum UV Grade Calcium Fluoride 10.0 mm 1.5 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
In Stock
Vacuum UV Grade Calcium Fluoride 12.5 mm 2.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
$121
In Stock
Vacuum UV Grade Calcium Fluoride 15.0 mm 2.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
$134
In Stock
Vacuum UV Grade Calcium Fluoride 25.0 mm 3.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
$268
In Stock
Vacuum UV Grade Calcium Fluoride 50.0 mm 3.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
$128
In Stock
Vacuum UV Grade Calcium Fluoride 20.0 mm 2.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
In Stock
Vacuum UV Grade Calcium Fluoride 30.0 mm 3.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
In Stock
Vacuum UV Grade Calcium Fluoride 40.0 mm 3.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock

Specifications

  • Antireflection Coating
    Uncoated
  • Surface Quality
    40-20 scratch-dig
  • Cleaning
  • Clear Aperture
    CAW: central 90% of diameter
    10CF: central 85% of diameter
  • Diameter Tolerance
    CAW: +0.0/-0.1 mm
    10CF: ±0.20 mm
  • Thermal Expansion Coefficient
    18.9 x 10-6 K-1 @ 300 K
  • Thermal Limit
    10 W m-1 K-1 @ 273 K
  • Wavelength Range
    250-7000 nm

Features

Ultra Broadband Applications

Calcium Fluoride has both high average transmission and low chromatic aberration compared to most IR materials. Unlike Germanium and Silicon, it is also transparent in the UV and Visible wavelength ranges, making it suitable for applications such as fluorescence imaging, or spectroscopy where operation over many wavelength bands is essential. Other application examples include use in femtosecond IR systems due to low group velocity dispersion in the IR) and use in excimer laser systems due to low UV absorption and high damage threshold).

Low Dispersion

The refractive index of Calcium Fluoride is remarkably stable vs wavelength. Visible chromatic aberration is extremely low with an Abbe Number of 95.31 compared to N-BK7 at 64.17, which means that this material is great for imaging applications. In the infrared region CaF2 is an excellent material to use in ultrafast experiments as it has the lowest group velocity dispersion (GVD) of any IR Material at 1.77 fs2/mm. This is half the GVD of Magnesium fluoride and orders of magnitude lower than Germanium or Silicon.