High-Durability Sapphire Protective Windows
High Scratch Resistance | Broad-Spectrum Transmission | OEM Custom Integration
- High Durability (Mohs 9): Monocrystalline sapphire provides strong resistance to scratches, chemicals, and elevated temperatures, making it suitable for protecting laser optics and sensors in harsh industrial environments.
- Broadband Transmission (UV to MWIR): Sapphire supports transmission across a broad spectral range from the UV to the mid-wave infrared, making it suitable for multispectral imaging, sensing, and machine vision applications.
- Thermal & Pressure Stability: Sapphire offers high mechanical strength and good thermal conductivity, supporting performance under pressure differentials and thermal cycling in sealed viewport applications.
- OEM & Industrial Supply: Sapphire protective windows are available in custom sizes, thicknesses, and coating options for industrial, sensing, and optomechanical applications.
Technical Specifications
| Technical Parameter | Specification |
|---|---|
| Substrate | Synthetic Sapphire (Al₂O₃) - C-plane, A-plane, or R-plane |
| Dimensions | Custom (Round, Square, Stepped, or Custom CNC Geometries) |
| Thickness | 0.3mm to 30mm |
| Surface Quality | 60-40 (Standard) to 40-20 Scratch-Dig (Precision) |
| Surface Flatness | < λ/4 @ 632.8nm |
| Parallelism | < 1 arc minute (Standard) / < 10 arc seconds (Precision) |
| Hardness | Mohs 9 (Knoop 2000) |
| Transmission Range | ~150nm to 5µm (Uncoated) |
| Coating | Uncoated, Single-layer MgF₂, or Custom BBAR |
| Clear Aperture | > 90% of central dimension |
Product Overview
Durable Protection for Precision Optics
When standard optical glass or fused silica fails under pressure or abrasive conditions, sapphire is a strong choice for demanding protective window applications.Our sapphire protective windows provide durable protection for sensitive sensors, cameras, and internal laser components.They are essential for protecting expensive internal optics from flying debris, high-pressure fluids, and corrosive gases in demanding manufacturing and analytical environments.
Multi-Spectral Versatility
Unlike many optical materials that absorb specific wavelengths, sapphire offers a remarkably broad transmission window. Whether you are developing a deep-UV curing system, a high-power visible laser alignment tool, or a mid-infrared thermal imaging device, a sapphire window can support a broad spectral range, with transmission performance depending on thickness, surface quality, and coating design.
Reliable, Ready-to-Integrate Optics
We understand that continuous B2B production depends on consistent quality and reliable component performance. We deliver globally compliant, tightly toleranced sapphire components directly to your factory floor or third-party integrators. With precision-chamfered edges to help reduce chipping risk, our windows are designed for reliable integration into optomechanical housings and sealed optical assemblies.
Application & Engineering Integration
Demonstrates an exceptionally broad transmission range, maintaining an average transmittance of >85% from the Ultraviolet (~0.3μm) straight through to the Mid-Wave Infrared (~3.5μm), providing a versatile solution for multi-spectral environments.
Figure 1: Interferometric Surface Analysis (Sapphire Window)
Demonstrates superior surface accuracy achieved through advanced polishing techniques. The interferogram shows a Peak-to-Valley (PV) flatness of 0.079λ (better than λ/10) and an RMS of 0.011λ, supporting low wavefront distortion in laser and imaging applications.
Metrology Analysis & Application Fit
- Target Wavelength: Broad transmission from ~170 nm (UV) to ~5.5 μm (MWIR)
- Birefringence Control: For polarization-sensitive applications, C-axis cut sapphire can help reduce birefringence effects and support stable polarized beam transmission.
- Primary Applications:
- Protective viewports for high-vacuum and high-pressure chambers.
- Cover glass for machine vision cameras in harsh industrial settings.
- Debris shields for high-power laser material processing.
- Protective windows for multi-spectral sensors and analytical instruments.
Custom Optomechanical Solutions
If your system requires specialized edge grinding for O-ring sealing, or custom broad-band anti-reflective (BBAR) coatings to improve transmission at specific operating wavelengths, our engineering team is ready to review your CAD files. We provide comprehensive, scaleable production solutions tailored precisely to your instrument housings.