Precision Optical Windows

ZYGO is trusted worldwide to provide optical windows for the most high-precision, advanced applications. For over 45 years, we specialize in bringing the most challenging optical designs to life. ZYGO works as your design partner, ensuring you receive windows meeting your most stringent specifications.

An optical window is a polished piece of material that is transparent at some portion of the electromagnetic spectrum, which allows the desired portion of the spectrum to pass into an optical instrument unaltered.

 "The tight tolerances of the large window that Zygo produced for us are impressive – our 6” sub-aperture wavefront error spec was achieved across the entire 16” window. Thank you for the high-performance optic." - BAE Systems

The ZYGO Advantage

ZYGO's optical windows are created using stringently controlled fabrication processes, allowing them to function reliably in a variety of extreme environments. ZYGO windows are found underwater, in deserts, at high altitudes and orbiting the earth.

Some common types of windows we produce include:

  • Conformal Windows
  • Debris Shields
  • Laser Windows
  • Metrology transmission flats
  • Periscope Windows
  • Vacuum Windows
  • Viewports
We customize every optical window to meet or exceed your requirements. The windows we create are unique, requiring cutting-edge fabrication technologies. ZYGO's proprietary processes allow us to create optical windows meeting challenging specifications, such as:
  • Sizes up to and exceeding one meter diameter
  • Advanced thin film coatings
  • Excellent transmitted wavefront error
  • High aspect ratio
  • Accurate wedge tolerance
  • High flexural strength
  • High laser induced damage threshold
  • Complex geometries


ZYGO has a long tradition of manufacturing custom optical windows for a wide variety of applications. Combining our metrology expertise, manufacturing experience, durable coatings and environmental testing capabilities allows us to provide you with data ensuring we deliver products meeting your most demanding requirements.

  • Defense & Aerospace
    • Intelligence, surveillance & reconnaissance (ISR)
    • FLIR sensing systems
    • High Energy Laser (HEL) / directed energy programs
  • Medical/Life Sciences
    • Manufacturing in ISO 13485:2003 compliant facility
  • Research and Development
    • Physics particle research
    • Earth science satellites


ZYGO is capable of processing a wide variety of optical materials for use in the UV, visible, and IR wavelength regions. Our engineers are prepared to help specify or suggest material choices based on cost, schedule and performance to fit your specific applications. 

Precision Optical Components & Systems
Optical Solutions for Defense & Aerospace Applications
Precision Optical Components & Systems
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Optical Solutions for Defense & Aerospace Applications
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