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ClearView™ Self-Cleaning Window

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ClearView™ Self-Cleaning Window


ClearView™ VHW Series Self-Cleaning Window

The ClearView™ VHW Series windows are self-cleaning viewports for use in deposition environments. The windows consist of an in-vacuum heated quartz disk, thermally isolated behind a standard vacuum window.  Material that would normally cloud or obscure the view through a vacuum window encounters the protective heated disk instead.  The material will re-evaporate from the heated disk at a rate dependent upon its vapor pressure/temperature curve.

The ClearView VHW Series offers two sizes of viewport, the VHW-150 with 1.37″ and VHW-250 with 2.37″.


ClearView VHW Series – 1.37″ Viewing Diameter

  • 7056 glass vacuum viewport
  • 1.37″ diameter viewing area
  • 2.75″ O.D. mounting flange
  • Thin profile allows maximum viewing area
  • Fused silica heated element
  • Continuous operation up to 550°C
  • Forced air cooling of housing
  • Suitable for UHV environments
  • Includes variable-temperature power supply



ClearView VHW Series  – 2.37″ Viewing Diameter

  • 7056 glass vacuum viewport
  • 2.38″ diameter viewing area
  • 4.5″ O.D. mounting flange
  • Fused silica heated element
  • Continuous operation at up to 350°C
  • Water cooled
  • Includes variable-temperature power supply