Ruby Optical Window with 85% Transmittance (DSP) for Laser
Transmission Customized
The Ruby Optical Window is a premium optical component fabricated
from synthetic ruby (Cr³⁺-doped α-Al₂O₃ single crystal),
specifically engineered for optical systems operating under extreme
conditions. Compared to conventional optical glass, ruby optical
windows deliver superior mechanical strength and environmental
durability while maintaining excellent light transmission
properties, making them ideal protective windows for high-power
laser systems, high-temperature industrial inspection equipment,
and special environmental monitoring devices. These windows
effectively shield internal precision optical components from dust,
corrosive media, and mechanical impacts, ensuring long-term stable
operation.
Key Characteristics
1. Broad-Spectrum High Transmittance: Ruby optical windows achieve
>90% transmittance in the visible spectrum (400-700nm) and
maintain >85% in the near-infrared range (700-1500nm), meeting
the requirements of most laser and optical sensing systems.
2. Exceptional Mechanical Properties: With a Mohs hardness of 9,
their scratch resistance is 20× greater than standard optical
glass, effectively withstanding sand erosion and mechanical
abrasion.
3. Outstanding Environmental Resistance: Capable of continuous
operation at 1200°C (short-term tolerance up to 1500°C) while
exhibiting excellent acid/alkali corrosion resistance (stable in pH
1-14 environments).
4. Superior Thermal Stability: The low thermal expansion
coefficient (6.5×10⁻⁶/°C) maintains optical surface accuracy
(<λ/8 @632.8nm) under rapid thermal cycling.
Technical Parameters
| Chemical Formula | Ti3+:Al2O3 |
| Crystal Structure | Hexagonal |
| Lattice Constants | a=4.758, c=12.991 |
| Density | 3.98 g/cm3 |
| Melting Point | 2040℃ |
| Mohs Hardness | 9 |
| Thermal Expansion | 8.4 x 10-6/℃ |
| Thermal Conductivity | 52 W/m/K |
| Specific Heat | 0.42 J/g/K |
| Laser Action | 4-Level Vibronic |
| Fluorescence Lifetime | 3.2μs at 300K |
| Tuning Range | 660nm ~ 1050nm |
| Absorption Range | 400nm ~ 600nm |
| Emission Peak | 795 nm |
| Absorption Peak | 488 nm |
| Refractive Index | 1.76 at 800nm |
| Peak Cross Section | 3.4 x 10-19cm2 |
Primary Applications
1. High-Energy Laser Systems: Serving as output windows and
protective lenses for laser resonators, ruby optical windows
withstand >10kW/cm² power density, making them ideal for CO₂ and
YAG lasers.
2. High-Temperature Industrial Monitoring: Used as observation
windows in steelmaking and glass manufacturing furnaces,
maintaining clear visibility at 1000-1500°C.
3. Aerospace: Employed as spacecraft viewports and missile radomes,
enduring aerodynamic heating and particle erosion during supersonic
flight.
4. Special Environment Detection: Provide reliable viewing channels
for deep-sea submersibles and nuclear reactor monitoring systems,
with pressure resistance exceeding 1000 atmospheres.
