NEW YAG Ultra High Vacuum Viewports

Expanding Optical Capabilities in Extreme Environments

MPF Products is proud to introduce the latest innovation in our hermetically sealed viewport lineup: YAG Ultra High Vacuum Viewports. Building on over 30 years of excellence in vacuum component manufacturing, this new offering reflects our continued commitment to problem-solving and performance in high-demand environments.

Partner with us and transform your operations and capabilities

Why Choose YAG (Yttrium Aluminum Garnet)?

YAG is a synthetic crystal with outstanding optical and mechanical properties that make it ideal for ultra high vacuum (UHV) applications across a range of cutting-edge industries:

Exceptional Transmission Range: Clear, undoped YAG offers broad-spectrum transparency from UV to IR (250nm to 4200nm).
Durable and Non-Birefringent: More durable than fused silica and optically superior to sapphire due to its non-birefringent nature.
High Performance Characteristics:
- Transmission >80% across spectrum
- Purity >99%
- Index of Refraction: 1.82
- Low internal stress, homogeneous, and non-toxic
- High bulk damage threshold
- Can be superpolished to <1 Avg RMS
- AR coatings available

YAG Specifications:

Transmission:

> 80% over the spectrum

Purity:

> 99%

Index of Refraction:

1.82 Material:

Low internal stress, non-toxic, homogeneous, high bulk damage threshold

Form:

Synthetic, Cubic, Crystal

Mechanical:

Can be superpolished and achieve <1 Avg RMS

AR Coatings Available:

Yes

Applications

MPF’s YAG UHV viewports are ideal for:

High-energy laser systems

LEDs and white light optics

Spectroscopy and range-finding lasers

Medical devices (ophthalmology, dermatology)

Materials processing

Cutting-edge physics research

Engineered for Precision
and Reliability

MPF’s YAG viewports are vacuum-rated from -196°C to 450°C and maintain hermeticity down to 1×10⁻⁹ cc/sec He. We integrate this material into standard vacuum hardware—including Conflat and Quick Flanges—and can deliver viewports ready for installation in your vacuum systems.

Have a unique application? We offer 100% custom designs to meet the specific demands of your system.

Need to Discuss a Custom Design?

MPF’s Engineering Team can help bring your ideas to life. Whether you need standard components or a fully custom solution, we’re ready to support your next project. Contact us today to get started.