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CF Flanged Quartz (Fused Silica) Non-Magnetic Viewports

CF Flanged Quartz (Fused Silica) Non-Magnetic Viewports Features:

  • Built from the highest-quality materials to UHV standards
  • Compatible with vacuum systems capable of reaching UHV levels
  • Viewports may be sealed with fully annealed copper gaskets to reduce induced strain
  • If the process deposits material, we strongly recommend a viewport shutter because deposits can damage and impair the optical properties of the lens.


UV & DUV Fused Silica Transmission Spectrum EUV Fused Silica Transmission Spectrum
Viewport Cleaning
Procedure Guide
For a guide on Viewport Cleaning Procedures, please click here.
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+1 800 245 1656
  • special case note
    All viewports are fragile and should be handled and mounted with extreme caution. Never scratch the viewing area-a weakened viewport may implode (or explode under wrong conditions). Make sure the "glass" chosen has a reasonable transmission at the wavelengths of interest.
  • special case note
    For safety, we strongly recommend that no viewport is exposed to a temperature ramp of greater than 2-3°C per minute, and that no viewport be exposed to direct thermal radiation. To limit thermal gradients when heating viewports, we recommend the viewing area and the flange be covered with many layers of aluminum foil to act as a reflective shield.
  • special case note
    Braze material may be noticeable on the glass around the sealing area of quartz viewports. This is not a manufacturing defect, products are verified such that braze material creep does not occlude the specified view area and the product passes leak check requirements. This material is not removed so as not to risk damaging the viewport lens.

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Contact Us - CF Flanged Quartz (Fused Silica) Non-Magnetic Viewports