GW32 Sapphire High-Precision Flat Optical Window
| Origin | Beijing, China |
|---|---|
| Manufacturer Type | Distributor |
| Product Category | Domestic |
| Model | GW32 |
| Price Range | USD 0.15–75.00 (per piece) |
| Component Type | Optical Element |
| Material | Single-Crystal Sapphire (Al₂O₃) |
| Diameter Options | 3.0–25.0 mm |
| Thickness Options | 1.0–2.0 mm |
| Surface Quality | λ/10 @ 633 nm |
| Parallelism | < 3 arcsec |
| Coating Options | AR (UV, VIS, NIR, SWIR), Custom Broadband or Laser-Line |
Overview
The GW32 Sapphire High-Precision Flat Optical Window is a monolithic, optically polished component engineered for demanding ultraviolet (UV) through near-infrared (NIR) transmission applications in vacuum, high-pressure, or chemically aggressive environments. Fabricated from single-crystal sapphire (α-Al₂O₃), this window leverages the material’s exceptional hardness (Mohs 9), thermal stability (up to 2040 °C melting point), and broad spectral transmission range (≈150 nm to 5500 nm). Unlike fused silica or BK7 glass, sapphire exhibits negligible UV absorption below 190 nm and maintains high transmission (>85%) across the deep-UV (DUV) band—making it indispensable for excimer laser systems (e.g., ArF at 193 nm, KrF at 248 nm), UV spectroscopy, and space-borne optical sensors. Its zero porosity and chemical inertness ensure long-term reliability in corrosive gas monitoring, semiconductor process chambers, and high-energy beamline diagnostics.
Key Features
- Ultra-high surface flatness: λ/10 @ 633 nm RMS wavefront error, verified via interferometric testing per ISO 10110-5
- Sub-arcsecond parallelism: < 3 arcseconds between entrance and exit surfaces, critical for collimated beam integrity and minimal wavefront distortion
- Controlled dimensional tolerances: ±0.02 mm on diameter, ±0.01 mm on thickness—traceable to NIST-traceable gauges
- Customizable anti-reflection (AR) coatings: Optimized multilayer dielectric stacks available for UV (190–400 nm), VIS (400–700 nm), NIR (700–1100 nm), or SWIR (1100–2500 nm); average reflectance < 0.25% per surface
- Scratch-dig specification: 10-5 per MIL-PRF-13830B, validated by automated dark-field inspection
- Thermal expansion coefficient: 5.3 × 10⁻⁶ /°C (a-axis), enabling stable mounting in cryogenic or high-temperature vacuum systems
Sample Compatibility & Compliance
The GW32 series is compatible with standard kinematic mounts, vacuum flanges (CF, KF, ISO-K), and optical breadboards using low-outgassing adhesives (e.g., Torr-Seal™) or indium gasket sealing. All sapphire substrates undergo full batch certification including crystallographic orientation verification (c-axis normal to surface), residual stress mapping via polariscope analysis, and outgassing rate testing per ASTM E595 (TML < 0.1%, CVCM < 0.01%). The product conforms to ISO 9001 manufacturing controls and supports GLP/GMP documentation packages—including Certificate of Conformance, Material Test Reports (MTRs), and coating spectral transmittance data sheets—for regulated environments such as pharmaceutical analytical instrumentation and aerospace sensor qualification.
Software & Data Management
While the GW32 is a passive optical component, its integration into larger systems benefits from traceable metrology data management. Each production lot includes a digital metrology dossier containing interferogram exports (Zygo .dat format), spectral transmission curves (measured on PerkinElmer Lambda 950 UV/VIS/NIR spectrophotometer), and coating design files (ThinFilm Software TFCalc® export). Customers may request encrypted cloud-accessible archives compliant with FDA 21 CFR Part 11 requirements for audit-ready electronic records. Raw measurement datasets are archived for ≥10 years and available upon formal technical inquiry.
Applications
- Deep-ultraviolet lithography tool windows and beam delivery optics
- Hermetic sealing of photomultiplier tube (PMT) and CCD/CMOS detector housings in analytical spectrometers
- Pressure viewport for high-temperature combustion diagnostics and plasma monitoring
- Front-surface protection for FTIR attenuated total reflectance (ATR) crystals and Raman probe tips
- Optical isolation in laser-induced breakdown spectroscopy (LIBS) sample chambers
- Space-qualified sun sensors and star trackers requiring radiation-hardened transmission elements
FAQ
What is the maximum operating temperature for the GW32 sapphire window?
Sapphire retains mechanical integrity up to 1000 °C in air and >1500 °C in inert atmospheres; continuous use above 800 °C requires custom edge-finishing to mitigate thermal shock risk.
Can the GW32 be coated for dual-band AR performance (e.g., UV + NIR)?
Yes—custom broadband coatings spanning 190–1100 nm are routinely fabricated; spectral ripple is typically < ±0.5% over the specified band.
Is the c-axis orientation guaranteed perpendicular to the surface?
Yes. Every GW32 window is cut from boules with X-ray diffraction-verified crystallographic alignment; orientation tolerance is ±0.2°.
Do you provide mounting hardware or kinematic adapters?
Standard SM-threaded retaining rings (e.g., SM1RR, SM2RR) and vacuum-compatible lens tubes are available as optional accessories; custom flange interfaces (e.g., CF35, ISO-K40) can be quoted separately.
Are there RoHS or REACH compliance declarations available?
Yes—full substance declaration per EU Regulation (EC) No 1907/2006 (REACH) and Directive 2011/65/EU (RoHS 2) is included in the Certificate of Conformance for each shipment.
