Sapphire Optical Windows

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Sapphire Optical Windows Extreme precision sapphire optical windows, customized to your specification

Sapphire Optical Window

Sapphire Optical Window with Gridding and Bussbar

Sapphire Optical Window with EMI Gridding and Bussbar
For the past 10 years, ZYGO has been the supplier of choice to Thales UK's optronics business for its sapphire windows needs. Thales UK has consistently found ZYGO able to deliver high performance, high quality windows on time and on budget in support of our Naval projects.
– Thales UK


ZYGO has a long tradition of manufacturing custom-made sapphire optical windows for a wide variety of applications, including, but not limited to:

• Aircraft windows

• Submarine windows


Medical/Life Sciences

Industrial OEM

• Intelligence, surveillance & reconnaissance


Sapphire optical windows are useful for UV, visible, and IR wavelengths, with transmission from less than 200 nm out beyond 5 microns. In addition to processing sapphire substrates, ZYGO's in-house coating facilities are capable of a wide variety of coatings for sapphire. Sapphire windows can be provided with or without thin film coatings. Gridding is also available in conjunction with ZYGO coatings.

• Infrared (IR) windows

• Visible windows

• Ultra-violet (UV) windows


ZYGO processes sapphire optical windows up to 340 mm in diameter, and larger. Window size is limited primarily by the availability of the size of the sapphire blanks.


ZYGO manufactures sapphire to the highest industry standards. Our sapphire finishing has been shown to have superior toughness and strength due to ZYGO's proprietary techniques.

Sapphire is second only to diamond in terms of hardness for window materials. The physical and optical characteristics of sapphire make it an ideal material for windows that are exposed to the most severe environments.

In addition to sapphire, ZYGO has the capability to process a wide range of materials to fabricate optical windows. Other window products include, but are not limited to:

Cleartran windows (water-clear Zinc Sulfide - ZnS)

Germanium windows

Glass windows (fused silica, BK7, etc.)

Silicon windows

Zinc selenide windows (ZnSe)

Inquiry/Quote Form – Optical Windows
Please use the form below to contact us with any questions you have regarding optical windows, or any of ZYGO's optical products, services, or capabilities. You may send any additional information, including specifications and/or prints, to:

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