CaF2Low index of refraction


The very broad spectral transmission range of Calcium Fluoride (CaF2) from 130 nm to 9 μm makes it suitable for various applications in the ultraviolet, visible and infrared spectrum.


U-Optics' expertise allows fabrication of CaF2 blanks in diameters up to 300 mm and with a thickness exceeding 100 mm . Our highly refined capabilities enable us to produce polished CaF2 surface that can be expected to withstand several years of exposure to normal atmospheric conditions.


Along with a wide variety of unique strategic partnerships, U-Optics sufficiently provides CaF2 optics at competitive prices and high quality that meet or surpass your requirements.


U-optics offer it’s customers high performance infrared products tailor made to the application needs. Please contact us to discuss your specific requirements.


Key Figures
  • Ideal for applications ranging from 250nm to 7μm.
  • Low index of refraction .
  • High laser durability.
  • Low stress birefringence Grinding, polishing and shaping to > 300 mm diameter.
  • Adequate high-quality CaF2 substrate available.



Ø  CaF2 Lenses

Ø  CaF2 Prisms

Ø  CaF2 Beamspliters

Ø  CaF2 Windows

Ø  CaF2 Domes

Ø  CaF2 Mirrors

Ø  CaF2 Wedge

Ø  Customs Optics




Ø  Clear Aperture                                      90%

Ø  Dimensional Tolerance                     +0.0/-0.1mm

Ø  Thickness Tolerance                          ±0.1mm

Ø  Center Thickness Tol.                        ±0.2mm

Ø  Surface Quality                                    40/20

Ø  Centering                                              3-5 arcminutes

Ø  Surface Accuracy                                 1/10λ@10.6μm

Ø  Parallelism                                           <1 acrminute

Ø  Design Wavelength(DWL)                 5μm




Ø  Customs Optics

Ø  Contact U-optics Support & Serve