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CF Flanged Quartz (Fused Silica) Laser Transmission Viewports

CF Flanged Quartz (Fused Silica) Laser Transmission Viewports Features:

  • Built from the highest-quality materials to UHV standards
  • Compatible with vacuum systems capable of reaching UHV levels
  • Optic and coating tailored to common laser wavelengths
  • 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


Reflectance of 193NM Reflectance of 248NM 532-1064nm LYAGD1 AR Coating Reflectance of 780NM Reflectance of 1064NM 780-1064nm LYAD2 AR Coating 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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Contact Us
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  • 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.
  • 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.
  • ** O-ring seals normally cannot handle temperatures as high as the viewport itself **
  • 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) Laser Transmission Viewports