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Fused Silica Corning 7980 High Grade Optical Glass Hole Windows. High Transmittance: Transmittance exceeds 95% for superior optical performance. Customizable Shape: Available in Round, Square, and special shapes like Hole or Cut. Diverse Material Options: Made from Bk7, Fused Silica, Corning 7980, or other materials. Customizable Coating: Offers AR, dielectric, metal, conductive (ITO), and other coatings. OEM and ODM Support: Accepts all OEM and ODM requests with flexible customization. Wide Size Range: Diameter available from 1mm to 300mm to meet specific needs. Professional R&D Team: Engineers provide lens design, assembly, and debugging services. Comprehensive Warranty: 1-year warranty or discussion-based coverage for quality issues.