Product IntroductionOptical Crystals

Features of CaF2 (calcium fluoride)
- high optical transmittance and chromatic aberration compensation capability -

Calcium fluoride (CaF2) is a material with high optical transmittance ranging from the vacuum ultraviolet region to the near-infrared region. It is chemically stable and has excellent resistance to the ultraviolet laser. It has excellent chromatic aberration compensation capability, with both low dispersivity and extraordinary low dispersivity.

Our CaF2 product
We provide an excimer laser grade CaF2 product with high optical transmittance and laser durability in the vacuum-ultraviolet region as lens materials for semiconductor lithography equipment and window materials for the ultraviolet lasers. Our visible/infrared grade material is also available for TV cameras, digital cameras, and astronomical telescopes as lens material with high chromatic aberration compensation capability in the visual light range, and for infrared analyzers as window material with high transmittance in the near-infrared region.

Key properties of CaF2 (calcium fluoride)

CAS registry number
7789-75-5
Density
3.18g/cm3
Melting point
1418℃
Moisture absorbency
0.00151g/100g H2O@18℃
Specific heat
0.211 cal/g・℃ (@50℃)
Thermal conductivity
0.0241 cal/cm・s・℃ (@50℃)
Thermal expansion
18.85E-06 /℃
Crystal structure
Cubic
Cleavage
{111} plane

Optical transmittance of calcium fluoride (CaF2) (without surface reflection correction)

Products

Excimer Laser Grade

We provide a product taking advantage of high optical transmittance and laser durability in the vacuum-ultraviolet region, suitable for a lens material for semiconductor lithography equipment and a window material for the ultraviolet lasers.

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Visible/Infrared Grade

Taking advantage of high chromatic aberration compensation capability in the visual light range, our products are available for a wide range of applications including TV cameras, digital cameras, and astronomical telescopes. We also offer a window material product for infrared analyzers in the near-infrared region.

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