Customized Shaped Sapphire Optical Windows Sapphire Components with Precision Polishing

Short Description:

Custom-shaped sapphire optical windows represent the pinnacle of precision optical engineering, utilizing Czochralski-grown monocrystalline Al₂O₃ with controlled crystallographic orientation (typically C-axis or A-axis) to optimize performance for specific applications. Our proprietary crystal growth process yields material with exceptional homogeneity (<5×10⁻⁶ refractive index variation) and minimal inclusions (<0.01ppm), ensuring consistent optical performance across production batches. The windows maintain remarkable environmental stability, with CTE of 5.3×10⁻⁶/K parallel to the C-axis, allowing seamless integration into multi-material assemblies subject to thermal cycling. Our advanced polishing techniques achieve surface roughness below 0.5nm RMS, critical for high-power laser applications where surface defects could initiate damage.

As a vertically integrated manufacturer, XKH provide comprehensive solutions from material synthesis to final inspection:

Design Support: Our engineering team offers DFM (Design for Manufacturing) analysis using Zemax and COMSOL simulations to optimize window geometry for specific optical/mechanical requirements

Prototyping Services: Rapid turnaround (<72 hours) for concept validation using our in-house CNC grinding and MRF polishing capabilities

Coating Options: Custom AR coatings with durability exceeding MIL-C-675C standards, including:

Broadband (400-1100nm) <0.5% reflectivity

VUV-optimized (193nm) with >92% transmission

Conductive ITO coatings (100-1000Ω/sq) for EMI shielding

Quality Assurance: Full metrology suite including:

4D PhaseCam laser interferometers for λ/20 flatness verification

FTIR spectroscopy for spectral transmission mapping

Automated inspection systems for 100% surface defect screening

Send email to us

Features

Technical parameters

Sapphire window
Dimension	8-400mm
Dimensional tolerance	+0/-0.05mm
Surface quality(scratch&dig)	40/20
Surface accuracy	λ/10per@633nm
Clear Aperture	＞85%,＞90%
Parallelism tolerance	±2''-±3''
Bevel	0.1-0.3mm
Coating	AR/AF/upon customer request

Key Features

1.Material Superiority

· Enhanced Thermal Properties: Exhibits thermal conductivity of 35 W/m·K (at 100°C), with a low thermal expansion coefficient (5.3×10⁻⁶/K) that prevents optical distortion under rapid temperature cycling. The material maintains structural integrity even during thermal shock transitions from 1000°C to room temperature in seconds.

· Chemical Stability: Demonstrates zero degradation when exposed to concentrated acids (HF excluded) and alkalis (pH 1-14) for prolonged periods, making it ideal for chemical processing equipment.

· Optical Refinement: Through advanced C-axis crystal growth, achieves >85% transmission in the visible spectrum (400-700nm) with scatter losses below 0.1%/cm.
· Optional hyper-hemispherical polishing reduces surface reflections to <0.2% per surface at 1064nm.

2.Precision Engineering Capabilities

· Nanoscale Surface Control: Utilizing magnetorheological finishing (MRF), achieves surface roughness <0.3nm Ra, critical for high-power laser applications where LIDT exceeds 10J/cm² at 1064nm, 10ns pulses.

· Complex Geometry Fabrication: Incorporates 5-axis ultrasonic machining for creating microfluidic channels (50μm width tolerance) and diffractive optical elements (DOE) with <100nm feature resolution.

· Metrology Integration: Combines white-light interferometry and atomic force microscopy (AFM) for 3D surface characterization, ensuring form accuracy <100nm PV across 200mm substrates.

Primary Applications

1.Defense Systems Enhancement

· Hypersonic Vehicle Domes: Engineered to withstand Mach 5+ aerothermal loads while maintaining MWIR transmission for seeker heads. Special nanocomposite edge seals prevent delamination under 15G vibration loads.

· Quantum Sensing Platforms: Ultra-low birefringence (<5nm/cm) versions enable precision magnetometry in submarine detection systems.

2.Industrial Process Innovation

· Semiconductor Extreme UV Lithography: Grade AA polished windows with <0.01nm surface roughness minimize EUV (13.5nm) scattering losses in stepper systems.

· Nuclear Reactor Monitoring: Neutron-transparent variants (Al₂O₃ isotopically purified) provide real-time visual monitoring in Gen IV reactor cores.

3.Emerging Technology Integration

· Space-Based Optical Comms: Radiation-hardened versions (after 1Mrad gamma exposure) maintain >80% transmission for LEO satellite laser crosslinks.

· Biophotonics Interfaces: Bio-inert surface treatments enable implantable Raman spectroscopy windows for continuous glucose monitoring.

4.Advanced Energy Systems

· Fusion Reactor Diagnostics: Multi-layer conductive coatings (ITO-AlN) provide both plasma viewing and EMI shielding in tokamak installations.

· Hydrogen Infrastructure: Cryogenic-grade versions (tested to 20K) prevent hydrogen embrittlement in liquid H₂ storage viewports.

XKH Services & Supply Capabilities

1.Custom Manufacturing Services

· Drawing-Based Customization: Supports non-standard designs (1 mm to 300 mm dimensions), 20-day rapid delivery, and first-time prototyping within 4 weeks.

· Coating Solutions: Anti-reflection (AR), anti-fouling (AF), and wavelength-specific coatings (UV/IR) to minimize reflection losses.

· Precision Polishing & Testing: Atomic-level polishing achieves ≤0.5 nm surface roughness, with interferometry ensuring λ/10 flatness compliance.

2.Supply Chain & Technical Support

· Vertical Integration: Full-process control from crystal growth (Czochralski method) to cutting, polishing, and coating, guaranteeing material purity (void-/boundary-free) and batch consistency.

· Industry Collaboration: Certified by aerospace contractors; partnered with CAS to develop superlattice heterostructures for domestic substitution.

3.Product Portfolio & Logistics

· Standard inventory: 6-inch to 12-inch wafer formats; unit pricing from 43to82 (size/coating-dependent), with same-day shipping.

· Technical consultation for application-specific designs (e.g., stepped windows for vacuum chambers, thermal shock-resistant structures).