Compare Model Drawings, CAD & Specs Material Diameter Thickness Surface Flatness Parallelism Availability Price
10CF20
$290
In Stock
 10CF20 IR Grade Calcium Fluoride 25.4 mm 2.0 mm λ/20 @ 10.6 µm < 3 arc minute
In Stock
 $290
10CF30
$237
In Stock
 10CF30 IR Grade Calcium Fluoride 25.4 mm 3.0 mm λ/20 @ 10.6 µm < 3 arc minute
In Stock
 $237
CAW10
$120
In Stock
 CAW10 Vacuum UV Grade Calcium Fluoride 5.0 mm 1.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
 $120
CAW11
$138
In Stock
 CAW11 Vacuum UV Grade Calcium Fluoride 10.0 mm 1.5 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
 $138
CAW12
$151
In Stock
 CAW12 Vacuum UV Grade Calcium Fluoride 12.5 mm 2.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
 $151
CAW13
$172
In Stock
 CAW13 Vacuum UV Grade Calcium Fluoride 15.0 mm 2.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
 $172
CAW14
$189
In Stock
 CAW14 Vacuum UV Grade Calcium Fluoride 25.0 mm 3.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
 $189
CAW15
$378
In Stock
 CAW15 Vacuum UV Grade Calcium Fluoride 50.0 mm 3.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
 $378
CAW16
$182
In Stock
 CAW16 Vacuum UV Grade Calcium Fluoride 20.0 mm 2.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
 $182
CAW17
$301
In Stock
 CAW17 Vacuum UV Grade Calcium Fluoride 30.0 mm 3.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
 $301
CAW18
$341
In Stock
 CAW18 Vacuum UV Grade Calcium Fluoride 40.0 mm 3.0 mm λ/2 @ 632.8 nm < 1 arc minute
In Stock
 $341

Specifications

  • Antireflection Coating
    Uncoated
  • Surface Quality
    40-20 scratch-dig
  • Cleaning
    See How to Clean Optics
  • 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.

Resources

Selection Guides

Technical Notes