Custom Sapphire Optical Window 222mm×74mm×4mm Wear Resistance for
Infrared windows
Blue Sapphire Optical Windows are primarily fabricated from
optical-grade sapphire (α-Al₂O₃ single crystal). Here,
"sapphire" refers not to natural gemstones but to high-purity,
single-crystal aluminum oxide (Al₂O₃). Renowned for its
exceptional hardness (Mohs hardness of 9, second only to
diamond), outstanding wear resistance, thermal stability
(melting point ~2030–2050°C), chemical inertness, and broad
spectral transmission (0.2 μm–5.5 μm), sapphire is an
indispensable material for extreme-environment optical
applications.
A "window" typically refers to a flat, transparent plate that
protects sensitive optical systems (e.g., sensors, lasers,
detectors) from environmental hazards such as dust, scratches,
chemical corrosion, or high-temperature/high-pressure conditions
while maintaining superior optical transmission.
Sapphire Optical Window Features
1.Ultra-High Hardness & Wear Resistance
- Mohs hardness of 9, enabling resistance to scratches and
abrasion in abrasive or mechanically demanding environments.
2.Broad Spectral Transmission
- High transmittance across UV (170–330 nm), visible (330–700 nm),
and mid-IR (up to 5.5 μm) wavelengths, with minimal
temperature-dependent infrared transmission loss.
3.Extreme Thermal Stability
- Withstands temperatures exceeding 1900°C (melting point:
2030–2050°C) without structural degradation, ideal for
high-temperature applications.
4.Chemical Inertness
- Resists corrosion by water, most acids, and alkalis, suitable for
harsh chemical environments.
5.Mechanical Robustness
- 5× stronger than glass, capable of enduring high mechanical
stress and impacts.
Sapphire Optical Window Applications
1. Semiconductor Manufacturing
- High-temperature furnace windows, observation ports requiring
chemical resistance and thermal stability.
2. Optical Instruments
- IR/UV windows, laser protective windows, spectrometer apertures,
barcode scanner optics.
3. Industrial Sensing
- High-pressure reactor viewports, flowmeter measurement windows,
sensor protective covers.
4.Scientific Research & Defense
- High-voltage chamber optics, synchrotron beamlines, aerospace FLIR
systems.
5.Consumer Electronics
- Watch crystals, smartphone camera protective lenses.
Sapphire Optical Window Data
Parameter Name
| Typical Value/Range
|
Material
| Optical-grade Sapphire Single Crystal (α-Al₂O₃)
|
Size
| 222mm×74mm×4mm
|
Thickness Tolerance
| ±0.1 mm
|
Clear Aperture
| >90%
|
Surface Roughness (Ra)
| ≤0.2 nm
|
Transmission Range
| 170–5500 nm
|
Thermal Expansion Coefficient
| 8.8 × 10⁻⁶/°C
|
Refractive Index
| 1.773
|
Elastic modulus
| 435 GPa
|
More samples of Sapphire Optical Window
*We accept customized one, please feel free to contact us about
your requirements.
Products Recommend
1. Q: Where are sapphire optical windows commonly used?
A: Sapphire optical windows are widely used in
high-temperature environments (e.g., industrial furnaces),
laser systems, defense equipment (FLIR systems), and
aerospace instrumentation due to their extreme durability and
thermal stability.
2. Q: What makes sapphire windows better than glass?
A: Sapphire offers superior hardness (Mohs 9), chemical
inertness, thermal resistance up to 2030°C, and broad
transmission (UV to mid-IR), making it ideal for harsh
applications where glass would degrade.
Tags: #Sapphire Optical Window, #Custom, #High Hardness, #High
Hardness, #Infrared Windows, #Al₂O₃ Single Crystal, #Optical
Instruments, #Double-Side Polished, #Sapphire Glass Windows Size 222mm×74mm×4mm, #Wear Resistance
