75mm fused silica window 15mm thick

Product Description

Thick Precision Fused Silica Plano-Plano Optical Window – 75mm Diameter × 15mm Thick

This is a premium, uncoated optical window fabricated from high-purity UV-grade fused silica. With a substantial 15mm thickness and 75mm diameter, it offers exceptional mechanical rigidity, thermal stability, and outstanding broadband transmission from deep UV through the visible spectrum into the near-infrared (NIR). Its robust design is engineered for demanding high-power and high-vacuum applications.

Key Specifications:

• Diameter: 75 mm

• Thickness: 15 mm (excellent parallelism, superior rigidity)

• Material: UV-grade fused silica (low thermal expansion, high laser damage threshold, >90% transmission from ~180 nm to 2.5 µm)

• Surfaces: Both surfaces optically polished, uncoated for maximum broadband transmission and minimal ghosting

• Clear Aperture: >90% of diameter (full aperture is usable)

• Edge Finish: Finely ground with protective bevels

Why This Thick Window Is Exceptional:

• Unmatched Durability: The 15mm thickness provides superior resistance to mechanical stress, pressure differentials, and thermal distortion compared to standard thin windows.

• Broadband Clarity: Uncoated surfaces ensure maximum transmission across the widest possible spectral range without coating-induced limitations or damage thresholds.

• Lab-Grade Heritage: Sourced from research or industrial surplus, guaranteeing professional fabrication and handling.

Applications:

• High-Power Laser Systems: Ideal beam path window or protective optic for excimer, Nd:YAG, or high-power diode lasers where coating damage is a concern.

• High-Vacuum & Cryogenic Viewports: Perfect for chamber windows requiring exceptional thermal shock resistance and UV-to-NIR transparency.

• UV Lithography & Spectroscopy: Essential substrate for deep-UV processes demanding low absorption and high durability.

• Optical Spacing & Reference: Use as an ultra-stable spacer, reference flat, or substrate for custom coating in precision metrology.

• Broadband Experimental Setups: For any lab configuration requiring uncompromised transmission from the UV to the NIR.