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Re-Entrant

MPF Products Inc. produces UHV Re-Entrant Viewports.  These specific viewports are perfect for allowing you to introduce cameras or other customer specific tools into the vacuum chamber.  MPF can customize our UHV Re-Entrant Viewports to be customer specific in regards to length, size, window material, mounting material and specified coatings wavelengths when needed.

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

  • UHV Viewport, UV Grade Fused Silica, Re-entrant Design, 3.50" In-Vacuum Length, 1.40" View Dia, 4.50" Conflat Flange

    UV Grade (2)

    Our UV Grade (Re-Entrant) Fused Silica viewports have good transmission & finish specifications, often used for non-laser uses. Feel free to contact us with any questions. 
  • Laser Grade

    Laser Grade (3)

    DUV Grade fused silica is utilized for MPF’s laser-grade viewports. Feel free to contact us with any questions. 
  • UHV Viewport, UV Grade Fused Silica, Re-entrant Design, 3.50" In-Vacuum Length, 1.40" View Dia, 4.50" Conflat Flange

    EUV Grade (2)

    EUV 193 grade viewports offer great transmission at some of the lowest frequencies possible for fused silica (Internal transmission > 99.5% at 193nm).