Sapphire Optical Windows

Sapphire (Al₂O₃) is a special optical crystal material combining ultrahigh hardness, high-temperature resistance, broad spectral transmission, and excellent chemical stability. Its industry-leading wear resistance, impact resistance, and temperature resistance make it a core window material for demanding applications in industrial high-temperature monitoring, aerospace, medical equipment, and high-power lasers. Scysgx uses high-purity single-crystal sapphire substrates and 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. Sapphire optical 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 demanding optical systems. Some standard specifications are stocked long term for rapid delivery.

Industrial high-temperature monitoring: windows for furnace-temperature monitoring, high-temperature furnace observation and infrared thermometry above 1000℃. Aerospace optics: windows for space detection, airborne imaging and high-temperature optical equipment in harsh aerospace environments. Medical optics: protective windows for medical lasers and high-temperature medical instruments, meeting cleanliness and stability requirements. High-power lasers: protective windows for industrial marking, cutting and welding and high-power laser optical paths. Research and metrology: windows for university laboratories, astronomical optics, precision spectrometers and metrology instruments, with research-grade accuracy. Outdoor/industrial optics: protective windows for security surveillance, vehicle lenses and outdoor industrial equipment requiring wear and scratch resistance.

Ultrabroad spectral transmission: stable, uniform transmission over 200nm–5500nm from deep UV to mid-IR, without significant absorption or scattering, for UV/IR multiband systems. Ultrahigh hardness and wear resistance: Knoop hardness up to 2200, among the hardest common optical materials, with scratch, impact and wear resistance and service life far beyond ordinary optical glass. Exceptional high-temperature stability: softening temperature 2000℃, expansion coefficient as low as 5.3×10⁻⁶/℃ and stable long-term operation above 1000℃ without optical-performance degradation. 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 diamond-like carbon and high-laser-damage-threshold coatings for multifunction optics. Excellent physicochemical stability: chemical inertness, acid/alkali corrosion resistance, no deliquescence and stable long-term performance in industrial, outdoor, medical and aerospace environments. Two grades: commercial for general industry and high precision for research, medical and aerospace applications, balancing performance and cost. IV. Core material advantages. Spectral coverage: high broadband transmission over 200nm (deep UV)–5500nm (mid-IR), a preferred multiband material with broad transmission and good stability. Optical properties: refractive index n_d=1.768, Abbe number Vd=72.2 and excellent optical homogeneity for advanced imaging and detection. Physical properties: density 3.97g/cm³, Knoop hardness 2200, extremely high hardness, scratch/impact resistance and long life. Thermal properties: expansion coefficient 5.3×10⁻⁶/℃, softening temperature 2000℃, outstanding heat resistance and thermal stability for long-term high-temperature operation. Application advantages: wear, corrosion and heat resistance make it an irreplaceable window material for industrial high-temperature monitoring, aerospace and medical equipment. V. Customization. Shapes: circular, square, rectangular and irregular, including steps, slots, holes and counterbores, with nonstandard sizes available. Dimensions: diameter/side length 1–1000mm, thickness 0.15–300mm, optimized tolerance grades for equipment space requirements. Surface treatment: chamfering, edge grinding, ultraclean polishing and custom cleaning for cleanrooms and special environments. Coatings: band-specific antireflection, high reflection, filtering, polarization and beam splitting to improve performance. VI. Standard coatings. Visible/near-IR AR: dedicated 0.4–0.7μm and 3.7–4.8μm antireflection improves transmission and reduces reflection losses. Deep-UV/UV AR: 200–400nm for UV optics and laser equipment. DLC: further improves surface hardness, contamination and scratch resistance and window life in industrial/outdoor environments. High-laser-damage-threshold coatings improve strong-laser tolerance and protect core optics in high-power systems. Other coatings: high reflection, filtering, polarization and beam splitting for multifunction optics. VIII. Yasi Optical advantages. Fully controlled in-house production: 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 measuring instruments and surface-quality testers control all parameters and ensure flatness, parallelism and transmission compliance. Oversize fabrication: batch production of 1–1000mm large-aperture sapphire windows for high-end systems. One-stop customization: shape, dimensions, tolerances and coatings, with optical-path adaptation support and dedicated nonstandard solutions. Two-grade delivery: commercial and high-precision grades, stable small/large-batch supply for general industry and advanced research/aerospace use. Stock and delivery: some standard products remain in stock for rapid delivery; controlled custom-order lead times meet project schedules. IX. Quality assurance. All sapphire 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.