Thick Precision Fused Silica Plano-Plano Optical Window

Premium thick plano-plano optical window in high-purity synthetic fused silica – ideal for high-power laser, UV, or vacuum applications. This monolithic disk features polished flat surfaces on both sides and classic ground/beveled edges for safety.

Exceptional clarity and no visible defects.

Key Specifications:

• Diameter: 75 mm

• Thickness: 24.5 mm

• Surfaces: Both plano (parallel flats), uncoated

• Material: Synthetic fused silica (UV-grade equivalent to Corning 7980/JGS1 – deep UV to NIR transmission, low absorption, high damage threshold)

• Edge Finish: Ground cylindrical with protective bevels

• Condition: Excellent clean surplus – pristine surfaces.

The substantial thickness provides outstanding rigidity and thermal stability – perfect for demanding environments where thinner windows would distort.

Applications:

• High-power laser beam path/window (excimer, YAG, diode systems)

• Vacuum chamber or cryostat viewport

• UV spectroscopy, lithography, or semiconductor exposure

• Optical spacer, reference flat, or custom coating substrate

• Aerospace/defense surplus – stable performance in extreme conditions

Fused silica is the gold standard for low-expansion, high-transmission optics. This piece stands out for its thickness and quality – rare in surplus at this size.

A must-have for laser enthusiasts, optical engineers, research labs, or anyone needing robust UV-visible performance!