Fused Silica Optical Window – 50 mm Diameter

Premium surplus plano-parallel optical window in pristine condition – precision manufactured from high-grade fused silica with single-sided anti-reflection coating. Excellent optical performance with these specifications:

• Diameter: 50 mm

• Thickness: 10 mm

• Material: Fused silica (synthetic quartz) – completely colorless with superior UV transmission, high purity, and low thermal expansion

• Surfaces: Both sides polished flat and parallel (plano-plano)

• Coating: Single-sided broadband anti-reflection (BBAR) multilayer coating optimized for visible spectrum (400–700 nm) – >99% on coated side) and minimal ghosting; uncoated side has natural ~4% reflection

• Condition: Like-new surplus – clean surfaces, no scratches, digs, or damage; ready for immediate use

This robust window delivers excellent mechanical strength and optical clarity. For best performance, orient the coated side toward the incident light. Ideal applications include:

• Laser beam delivery or protective viewports (high laser damage threshold; reduced reflection on entry side)

• UV-visible spectroscopy and imaging systems

• Vacuum chamber windows or environmental enclosures

• Precision optical experimentation and prototyping