Zinc Sulfide Cleartran™ Windows

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Zinc Sulfide Cleartran™ Optical Windows Extreme precision Zinc Sulfide (Cleartran™) optical windows, customized to your specification

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 optical windows for a wide variety of applications, including, but not limited to:

• Amplifier Slabs, discs and rods

• Debris Shields

Laser fusion optics

• Reference surfaces


Medical/Life Sciences

Industrial OEM

• Intelligence, surveillance & reconnaissance


ZYGO has developed a wide range of manufacturing processes to accommodate optical windows operating in the infrared (IR), visible, and ultra-violet (UV) parts of the spectrum. Similarly, ZYGO has experience with multi-spectral applications, combining IR and visible. Optical windows can be provided with or without thin film coatings.

• Infrared (IR) windows

• Ultra-violet (UV) windows

• Visible windows


ZYGO can fabricate zinc sulfide (Cleartran™) optical windows ranging in size from a few millimeters to greater than 1 meter.


In addition to Zinc Sulfide (Cleartran™), ZYGO has the capability to process a wide range of materials to fabricate optical windows. Other window products include, but are not limited to:

Germanium windows

Glass windows (fused silica, BK7, etc.)

Sapphire windows (various crystal orientations)

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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