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Calcium Fluoride (CaF2)

Calcium Fluoride (CaF2) is used optically as windows, prisms and lenses transmitting from the vacuum ultraviolet (VUV) into the infrared.  It is a physically and chemically stable optical material with good water and chemical resistance. Two qualities are manufactured, one for Visible and Infrared applications and the other specifically for Ultraviolet applications.  For Ultraviolet applications, these are grown from chemically pure powder.

MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport.  We ship our viewports UHV ready.  You may simply blow off the glass to remove any contaminants with clean, dry air.  For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes.

Bake-Out Ramp Rate: 20°C per Minute

– Calcium Fluoride (CaF2) Transmission Chart

  • UHV Viewport, Calcium Fluoride (CaF2), 157 Grade, UHV Rated Vacuum-Optics, 1.88″ View Dia, 4.50″ Conflat Flange

    157 Grade (2)

    MPF’s CaF2 viewports are often a great option for low frequency applications. The 157 Grade has the highest quality & specifications for the most challenging low-frequency uses. 
  • UHV VIewport, Calcium Fluoride (CaF2), Non-Magnetic, UHV Rated Vacuum-Optics, 0.90" View Dia, 2.75" Conflat Flange(316LN)

    Standard Grade (6)

    Our Standard Grade Calcium Fluoride Viewports are a great choice for low-frequency applications; offering high quality for a reasonable price.