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Demaco > Products > Vacuum Feedthroughs > Viewport and Shutter

Category: Viewport and Shutter

Our viewports are plane parallel windows hermetically sealed to stainless steel KF, ISO or CF flanges.
Several standard material options are offered covering various common transmission ranges and applications. Optical coatings are available to enhance and optimize viewport transmission.

Sapphire viewports are available with view diameters up to 3 inches, and are bakeable to 450˚C. Single crystal, sapphire windows, with either 0˚ or 90˚ orientation, offer excellent transmission from 250 nm to 4 microns.

Fused Silica
Fused Silica viewport designs are available with diameters up to 8 inches and include zero length designs for low profile applications. These are all bakeable to 200˚C. Several standard grades of Fused Silica windows are offered having excellent transmission from 193nm to 2 microns.

Coated Fused Silica
These viewports utilize optimum window and anti-reflective coating specifications to maximize performance at specific wavelengths. Supported wavelengths and laser applications are:

– 193nm-ArF Excimer
– 248nm-KrF Excimer
– 780nm-Diode and
– 1064nm YAG.

Extended Range Vacuum Optics
These ultra-high vacuum (UHV) viewports employ window materials such as Zinc Selenide, Magnesium Fluoride and Calcium Fluoride. All-metal-sealed, extended-range optics are
available in 1 inch and 2 inch view diameters with a combined transmission range of 120nm to 20 microns. Coatings which enhance the transmission performance of many of these viewports are offered as standard options. Many non-standard materials, coatings and optical specifications
may be reviewed and quoted to meet custom application requirements.

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Showing 1–12 of 109 results

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