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-150 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-250 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 450°C
- Water cooled
- Includes variable-temperature power supply