Zinc Selenide Optical Window

Zinc selenide (ZnSe) is a core high-performance material designed for CO₂ laser systems and mid- and far-infrared optical systems. Its extremely broad 600nm–18μm transmission band, very low absorption at the 10.6μm CO₂ laser band, excellent thermal stability, and optical homogeneity make it an indispensable window component for industrial laser processing, infrared thermal imaging, medical laser equipment, and infrared detection. Scysgx uses high-purity CVD zinc selenide 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. Zinc selenide 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. Specialized 10.6μm antireflection, DLC diamond-like carbon, and high-laser-damage-threshold coatings are available, providing highly precise, stable window solutions for high-power CO₂ lasers and mid- and far-infrared optical systems. Some standard specifications are stocked long term for rapid delivery.

High-power CO₂ lasers: protective windows for laser cutting, welding, marking, drilling and engraving, meeting 10.6μm optical-path protection needs. Infrared thermal imaging: windows for industrial temperature measurement, security thermal cameras, vehicle night vision and infrared detectors across mid-/far-IR bands. Medical lasers: windows for medical laser therapy and noninvasive infrared testing, meeting cleanliness and stability requirements. Industrial monitoring: windows for infrared spectrometers, high-temperature monitoring and oil/gas exploration measurement instruments. Research and metrology: windows for university laboratories, astronomical optics, precision infrared spectrometers and metrology instruments.

Dedicated high CO₂-laser transmission: excellent transmission and extremely low absorption at 10.6μm for CO₂ lasers greatly reduce energy losses in high-power CO₂ equipment. Broadband mid-/far-IR transmission: stable, uniform visible-to-far-IR transmission over 600nm–18000nm (0.6–18μm), meeting multiband infrared-system needs. Thermal stability for high-power operation: low expansion and no significant thermal deformation under high-power laser operation maintain long-term optical stability. 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: dedicated 10.6μm AR, DLC diamond-like carbon, mid-/far-IR AR and high-laser-damage-threshold coatings improve transmission, wear resistance and laser tolerance. Two grades: commercial for general industry and high precision for medical/research applications, balancing performance and cost. IV. Core material advantages. Spectral coverage: high broadband transmission over 600nm (visible)–18000nm (far-IR), with outstanding 10.6μm CO₂-laser performance, a preferred laser-processing material. Optical properties: refractive index n_d=2.403, extremely low infrared scattering and excellent optical homogeneity for precision infrared imaging and laser optics. Physical properties: density 5.27g/cm³, Knoop hardness 120, moderate strength, excellent machinability and easy ultraprecision planar polishing. Thermal properties: expansion coefficient 7.1×10⁻⁶/℃, softening temperature 250℃, good stability under high-power lasers without significant thermal lensing. Application advantages: low absorption and high transmission make it a standard window material for high-power CO₂ lasers, also suitable for infrared thermal imaging and medical lasers. V. Customization. Shapes: circular, square, rectangular and irregular, including steps, slots, through-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: dedicated 10.6μm AR, 3–5μm/8–12μm/2–14μm mid-/far-IR AR, DLC and other layers improve optical performance and durability. VI. Standard coatings. Dedicated CO₂-laser AR: 10.6μm antireflection greatly improves laser transmission and reduces reflection losses in high-power CO₂ equipment. Mid-/far-IR AR: dedicated 3–5μm, 7–14μm and 2–14μm antireflection for infrared thermal imaging and detection. DLC: improves surface hardness, contamination and scratch resistance and window life in industrial processing and outdoor environments. High-laser-damage-threshold coatings improve strong-laser tolerance and protect core optics in high-power CO₂ systems. 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 zinc selenide windows for high-end infrared and laser optical 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/medical 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 zinc selenide windows undergo ZYGO interferometric flatness, precision parallelism, optical dimensional, infrared 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.