Optical Glass Window

Optical glass windows are the most widely used general-purpose plane optical components in visible-to-near-infrared optical systems. Representative materials include N-BK7, fused silica, and sapphire. Excellent broadband transmission, physical and chemical stability, ease of processing, and cost effectiveness make them standard window components for industrial lasers, security imaging, scientific instruments, medical optics, and aerospace. Scysgx uses more than 260 precision processing machines and 65 specialized inspection instruments to provide a complete closed-loop production line covering cutting, grinding, polishing, coating, and quality inspection. Optical glass windows are available in round, square, and custom shapes, including stepped, slotted, and drilled designs, in sizes from 1–1000mm, with commercial-grade and high-precision options and flatness up to λ/20. Antireflection, high-reflection, DLC diamond-like carbon, and other specialized coatings are available, providing highly precise, stable window solutions for general optical systems. Some standard specifications are stocked long term for rapid delivery.

Industrial lasers: protective windows for marking, cutting and welding and high-power optical paths. Security/consumer optics: protective windows for surveillance cameras, vehicle lenses and consumer optical systems, supporting visible imaging. Research/metrology: windows for university laboratories, astronomical optics, precision spectrometers and metrology instruments, with research-grade accuracy. Medical optics: windows for diagnostic instruments, noninvasive testing and optical imaging, meeting cleanliness and stability requirements. Aerospace/industrial optics: windows for space optical detection, outdoor industrial equipment and high-temperature optical systems under harsh conditions.

Broadband high transmission from deep UV to near-IR (N-BK7: 350–2200nm; fused silica: 200–3500nm; sapphire: 200–5500nm), stable and uniform for general optical systems. Stable physicochemical properties: chemical inertness, acid/alkali corrosion resistance and resistance to deliquescence provide long-term performance without degradation in industrial, outdoor and medical environments. Ultraprecision planar fabrication: high-precision flatness to λ/20, parallelism down to 1″ and surface quality to 10-5, without scratches or defects, ensure stable optical transmission. Full shape/specification customization: circular, square and irregular shapes with steps, slots, holes or counterbores, dimensions 1–1000mm and thickness 0.15–300mm suit diverse installations. Multiple coatings: antireflection, high reflection, filtering, polarization, beam splitting, DLC and high-laser-damage-threshold coatings for multifunction optics. Two grades: commercial for general industry and high precision for research/medical applications, balancing performance and cost. Rich material choices: N-BK7, fused silica, sapphire and other optical glasses/crystals selected for band, environment and cost. IV. Main material advantages. 1. N-BK7 optical glass, preferred for general industry. Spectral: high visible-to-near-IR transmission over 350–2200nm without significant absorption/scattering. Optical: n_d=1.5168, Vd=64.2 and excellent chromatic correction for general imaging/detection. Thermal: expansion coefficient 7.1×10⁻⁶/℃, softening temperature 557℃, good stability. Mechanical: Knoop hardness 610, excellent machinability, easy ultraprecision planar polishing and controlled costs. 2. Fused silica, preferred for UV/high-temperature use. Spectral: high deep-UV-to-near-IR transmission over 200–3500nm, with outstanding deep-UV performance. Optical: n_d=1.459, Vd=67.8 and low dispersion for UV/high-temperature optics. Thermal: expansion coefficient 0.52×10⁻⁶/℃, softening temperature 1627℃ and exceptional heat resistance/stability. Mechanical: Knoop hardness 522, chemical inertness and acid/alkali corrosion resistance for harsh industry/research. 3. Sapphire, preferred for high-hardness/wear-resistant use. Spectral: high deep-UV-to-mid-IR transmission over 200–5500nm, broad and stable. Optical: n_d=1.768, Vd=72.2 and excellent homogeneity for high-end systems. Thermal: expansion coefficient 5.3×10⁻⁶/℃, softening temperature 2000℃ and outstanding heat/impact resistance. Mechanical: Knoop hardness 2200, extreme hardness, wear/scratch resistance for demanding industrial, outdoor and medical use. V. Customization. Shapes: circular, square, rectangular and irregular, including steps, slots, holes, counterbores and custom chamfers; nonstandard dimensions supported. Dimensions: diameter/side length 1–1000mm, thickness 0.15–300mm, optimized tolerance grades for equipment space. Surface treatment: ultraclean polishing, custom chamfers, edge grinding and special cleaning for cleanrooms/special environments. Coatings: band-specific AR, HR, filtering, polarization and beam splitting improve performance. VI. Standard coatings. Visible AR: dedicated 0.4–0.7μm antireflection improves transmission and reduces losses for general imaging. UV/near-IR AR: dedicated laser bands such as 0.355/0.532/1.064μm. HR: high reflectance in specified bands for beam turning and laser resonators. DLC: improves hardness, contamination/scratch resistance and window life outdoors/in industry. High-laser-damage-threshold coatings improve strong-laser tolerance and protect core optics in high-power systems. Other coatings: filtering, polarization and beam splitting for multifunction optics. VIII. Yasi Optical advantages. Fully controlled in-house closed-loop blank cutting, milling/grinding, polishing, coating, inspection, cleaning and packaging, without outsourcing and with full traceability. Precision equipment: ZYGO interferometers, precision parallelism testers, optical dimensional instruments and surface-quality testers ensure flatness, parallelism and transmission compliance. Oversize fabrication: batch production of 1–1000mm large-aperture optical-glass windows for high-end systems. One-stop customization: materials, shape, dimensions, tolerances and coatings, with optical-path adaptation support and dedicated nonstandard solutions. Two-grade delivery: commercial/high-precision grades and stable small/large batches for industry and advanced research/medical use. Stock/delivery: some standard products stocked for rapid supply, with controlled custom-order lead times meeting schedules. IX. Quality assurance. All optical-glass windows undergo ZYGO interferometric flatness, precision parallelism, optical dimensional, spectral transmission and surface-quality inspections to ensure 100% compliance. Automated ultrasonic ultraclean washing and vacuum moisture-proof packaging ensure transport and long-term stability for cleanrooms and harsh environments.