Calcium Fluoride Optical Window

Calcium fluoride (CaF₂) is a high-performance optical crystal material covering the broad spectrum from deep ultraviolet to mid-infrared. Its extremely broad transmission band, ultralow dispersion, high optical homogeneity, and excellent physical and chemical stability make it an ideal window material for ultraviolet/infrared dual-band optical systems, medical optics, infrared detection, spectroscopy, and research experiments. Scysgx uses high-purity calcium 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. Calcium 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.

UV-infrared dual-band optical systems: deep-UV/mid-IR combined systems, broadband spectrometer windows and protective windows for dual-mode imaging. Infrared systems: windows for mid-IR thermal imaging, temperature measurement, detection and sensing, covering 3–5μm requirements. Medical optics: windows for medical UV diagnosis, infrared noninvasive testing and precision medical 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: protective windows and optical-path protection for high-power UV/IR lasers. Aerospace optics: windows for space infrared detection, broadband optical reconnaissance and airborne imaging under harsh conditions.

Ultrabroad spectral transmission: excellent, stable transmission over 200nm–7000nm from deep UV to mid-IR, for UV/IR dual-band systems. Ultralow dispersion: Abbe number up to 95.1 provides excellent chromatic correction, reduces dispersion interference in broadband imaging/detection and ensures data and imaging accuracy. 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. Customization of all shapes and specifications: 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, diamond-like carbon (DLC) and high-laser-damage-threshold coatings support multifunction systems. Excellent physicochemical stability: high-temperature and radiation resistance, chemical inertness, resistance to deliquescence and corrosion, and stable long-term performance in harsh industrial, medical and research environments. Two grades: commercial grade for general industry and high-precision grade for research/medical applications, balancing performance and cost. IV. Core material advantages. Spectral coverage: high broadband transmission over 200nm (deep UV)–7000nm (mid-IR), a preferred dual-band material without significant absorption or scattering. Optical properties: refractive index n_d=1.434, Abbe number Vd=95.1, ultralow dispersion, high contrast and easily corrected aberrations for precision imaging and spectroscopy. Physical properties: density 3.18g/cm³, Knoop hardness 158.3, moderate mechanical strength, excellent machinability and suitability for ultraprecision planar polishing. Thermal properties: expansion coefficient 18.85×10⁻⁶/℃, softening temperature 800℃, excellent heat resistance and thermal stability, without significant optical deterioration under temperature fluctuations. Application advantages: outstanding radiation resistance for medical, aerospace and research spectroscopy, without long-term performance drift. 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: band-specific antireflection, high-reflection, filter, polarization and beamsplitter coatings to improve performance. VI. Standard coatings. Deep-UV/UV AR: dedicated 200–400nm antireflection improves deep-UV transmission and reduces reflection losses. Near-/mid-IR AR: 1.65–3μm and 3–5μm for infrared optics and lasers. Broadband AR: full-band 200nm–7μm for UV/IR dual-band systems. DLC: improves surface hardness, contamination and scratch resistance and window life in outdoor/industrial use. 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 calcium 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 calcium 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.