KF Flanged Sapphire Viewports

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Lesker - KF Flanged Sapphire Viewports


KF Flanged Optical Glass Viewports Features:

  • Built from the highest-quality materials to UHV standards
  • Compatible with vacuum systems capable of reaching High Vacuum levels

UV Sapphire Features:

  • Leak Rate <2x10-10 atm cc/sec He
  • Parallelism <3 Arc Minutes
  • 304L Stainless Steel Flange
  • Temperature Range -100°C to 450°C**
  • Surface Finish 50/20
  • UV Transmission 50% @ 250nm (external)
  • Orientation 0-90 Degrees

NOTE: **O-ring seals normally cannot handle temperatures as high as the viewport itself **

CAUTION: Although sapphire has a reasonable thermal conductivity, for safety, Kurt J. Lesker / Premier Solutions 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.

Dimensional Drawings







Premier Solutions Pte Ltd / Lesker KF Flanged Sapphire Viewports

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