Magnesium Fluoride Optical Window

Magnesium fluoride (MgF₂) is a high-performance optical crystal material covering an extremely broad spectrum from vacuum ultraviolet to mid-infrared. Its industry-leading deep-ultraviolet transmission, ultralow dispersion, high mechanical hardness, and excellent chemical stability make it an ideal window material for demanding applications in vacuum-ultraviolet optics, ultraviolet lasers, infrared detection, research metrology, and medical optics. Scysgx uses high-purity magnesium fluoride single-crystal 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. Magnesium fluoride optical windows are available in round, square, and custom shapes, 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 broadband optical systems. Some standard specifications are stocked long term for rapid delivery.

Vacuum-/deep-UV optics: windows for vacuum-UV detection, deep-UV lithography, UV lidar and UV light-source systems. Infrared optics: windows for mid-IR thermal imaging, infrared temperature measurement, detection and sensing, meeting 3–5μm requirements. Medical optics: windows for UV diagnosis, infrared noninvasive testing and precision imaging, meeting cleanliness and stability requirements. Research and metrology: windows for university laboratories, astronomical optics, precision spectrometers and metrology instruments, with research-grade accuracy. Laser equipment: UV/IR laser protective windows and optical-path protection for high-power systems. Aerospace and industrial optics: windows for space vacuum-UV detection, airborne optical imaging and outdoor industrial optical equipment under harsh conditions.

Ultrabroad spectral transmission: excellent, stable transmission over 120nm–7000nm from vacuum UV to mid-IR, including excellent vacuum-UV transmission at 120nm, for deep-UV and UV/IR dual-band systems. Ultralow-dispersion imaging: Abbe number up to 106.2, among the best dispersion characteristics of common optical crystals, eliminates broadband chromatic interference and ensures imaging and detection accuracy. High mechanical hardness and wear resistance: Knoop hardness 415, high strength, scratch and impact resistance, and long service life suit harsh industrial and outdoor use. 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 or holes, 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, no deliquescence, acid/alkali corrosion resistance and stable, drift-free long-term performance in harsh industrial, medical and research environments. Two grades: commercial for general industry and high precision for research/metrology, balancing performance and cost. IV. Core material advantages. Spectral coverage: high broadband transmission over 120nm (vacuum UV)–7000nm (mid-IR), a preferred vacuum-UV/mid-IR dual-band material without significant absorption or scattering. Optical properties: refractive index n_d=1.413, Abbe number Vd=106.2, ultralow dispersion, high contrast and easily corrected aberrations for precision broadband imaging and spectroscopy. Physical properties: density 3.18g/cm³, Knoop hardness 415, high strength, scratch resistance, excellent machinability and ultraprecision planar polishing. Thermal properties: expansion coefficient 13.7×10⁻⁶/℃, softening temperature 1255℃, excellent heat resistance and thermal stability, without significant optical deterioration under temperature fluctuations. Chemical properties: chemically inert, nondeliquescent and resistant to acids/alkalis, with stable long-term performance outdoors and in complex industrial/medical environments. 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 vacuum environments. Coatings: band-specific antireflection, high reflection, filtering, polarization and beam splitting to improve performance. VI. Standard coatings. Vacuum-/deep-UV AR: dedicated 120–400nm antireflection improves deep-UV transmission and reduces reflection loss. Near-/mid-IR AR: 0.28–3μm and 3–5μm for infrared optics and lasers. Broadband AR: full-band 120nm–7μm for vacuum-UV/mid-IR dual-band systems. DLC: improves surface hardness, contamination and scratch resistance and window life outdoors and in industry. High-laser-damage-threshold coatings improve strong-laser tolerance and protect core optics in high-power UV/IR 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 magnesium fluoride 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/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 magnesium fluoride 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.