Glass blank flange from borosilicate DN40KF, OD = 55mm

Vacuum Viewports – Crystal-Clear Performance for Demanding Applications

Whether you’re observing, measuring, or transmitting light into your vacuum system, our high-performance viewports deliver clarity, durability, and precision. Designed for KF, ISO, and CF flanges, each viewport is hermetically sealed and built to withstand the rigors of vacuum environments.

🔍 Choose the Right Window for Your Application

Sapphire Viewports – Rugged & High-Temp Ready

• View diameters up to 3 inches
• Bakeable to 450 °C
• Made from single-crystal sapphire with 0° or 90° orientation
• Excellent optical transmission from 250 nm to 4 microns
• Ideal for high-pressure, high-temperature, and chemically aggressive environments

Fused Silica Viewports – Versatile & Low-Profile

• Available in sizes up to 8 inches
• Zero-length designs for compact setups
• Bakeable to 200 °C
• Superior transmission from 193 nm to 2 microns
• Multiple grades available to match your optical needs

Coated Fused Silica – Optimized for Precision

• Anti-reflective coatings tailored for specific wavelengths
• Enhanced performance for laser, spectroscopy, and imaging applications

UHV Extended Range Viewports – See Beyond the Standard

• Built with Zinc Selenide, Magnesium Fluoride, or Calcium Fluoride
• All-metal-sealed for ultra-high vacuum compatibility
• Available in 1” and 2” view diameters
• Broad transmission range: 120 nm to 20 microns
• Custom materials, coatings, and specs available on request

🛠️ Custom Solutions Available

Need something specific? We offer non-standard materials, coatings, and optical specs to meet your unique application requirements. Just reach out—we’re here to help you build the perfect viewport solution.