Sales Engineer: Grace Gao
Email: grace@rsnv.cn
WhatsApp: +86 199 2997 5286
1. High Reflectivity at 10.6μm for Maximum Power Efficiency
The gold-coated silicon mirror achieves >99.6% reflectivity at 10.6μm (CO2 laser wavelength), ensuring that the majority of laser power reaches the workpiece rather than being absorbed by the mirror. For scanning applications where beam steering accuracy is critical, high reflectivity directly translates to faster processing speeds and cleaner cut/engraving quality. Industry standards for CO2 scanning mirrors typically range from 99.5% to 99.8% reflectivity.
2. Dual-Band Coating Enables Visible Red Pilot Beam Alignment
Unlike standard CO2 mirrors that only reflect 10.6μm, this scanning mirror features >85% reflectivity at 650nm (visible red). This allows operators to use a low-power red alignment beam for system calibration and workpiece positioning before firing the invisible CO2 laser. The ability to see exactly where the laser will strike dramatically improves setup accuracy and reduces material waste.
3. Lightweight Silicon Substrate Optimized for High-Speed Scanning
Silicon is the preferred substrate material for scanning applications due to its low density (2.33 g/cm³) and high stiffness. Compared to copper mirrors (density 8.96 g/cm³), silicon mirrors are approximately 3.7x lighter for the same dimensions. This reduced inertia allows galvanometer scanners to achieve higher acceleration, faster positioning speeds, and more precise motion control—critical factors for high-throughput laser marking and engraving systems.
4. Excellent Thermal Stability for High-Power CW Lasers
The silicon substrate exhibits a coefficient of thermal expansion (CTE) of 2.6 × 10⁻⁶/K, providing excellent dimensional stability even under high thermal load from CW CO2 lasers. This minimizes beam wander and focus shift during extended operation. While copper offers higher thermal conductivity, silicon's low CTE ensures that mirror flatness is maintained under varying power levels, preserving beam quality across the entire scan field.
5. Wide Range of Standard Sizes with Full Customization
Available in 7mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, and 30mm beam sizes, these mirrors accommodate most commercial CO2 laser galvo head requirements. Each mirror is designed with precision-calculated dimensions to ensure optimal match with the laser beam size, maximizing scanning efficiency. Custom sizes and rectangular formats (for X/Y axis differentiation) are also available.
6. Optimized for Galvanometer Scanner Integration
These scanning mirrors are specifically engineered for mounting onto high-speed two-axis galvanometer systems. The dimensions, thickness, and mounting interfaces are designed to standard industry specifications, ensuring seamless integration with existing galvo heads from major manufacturers. For two-axis scan mirror configurations, the Y mirror is typically larger than the X mirror to accommodate the beam path geometry.
7. High Laser Damage Threshold for Demanding Applications
The gold-coated silicon construction provides a laser-induced damage threshold (LIDT) of approximately 530 W/mm (CW) , making these mirrors suitable for CO2 lasers ranging from 40W to 200W and beyond. The hard gold coating resists oxidation and tarnishing, maintaining high reflectivity over extended service life.
|
Parameter |
Specification |
|
Product Name |
CO2 Laser Scanning Mirror / Galvo Mirror |
|
Substrate Material |
Silicon (Si) |
|
Coating |
Hard Gold (Electroplated) |
|
Reflectivity @10.6μm |
R > 99.6% (typical) |
|
Reflectivity @650nm |
R > 85% |
|
Surface Quality |
40-20 Scratch-Dig |
|
Surface Flatness |
λ/4 @ 633nm per 1" diameter |
|
Clear Aperture |
> 90% of diameter |
|
Incident Beam Size |
7 / 10 / 12 / 14 / 16 / 18 / 20 / 30 mm |
|
Shape |
Typically rectangular (X/Y axis sets) |
|
Diameter/Size Tolerance |
+0 / -0.13 mm |
|
Thickness |
1.2 mm - 3.0 mm (dependent on size) |
|
Laser Damage Threshold (CW) |
> 500 W/mm (typical) |
|
Coefficient of Thermal Expansion |
2.6 × 10⁻⁶ /K |
|
Density |
2.33 g/cm³ |
|
Application |
CO2 laser scanning system |
Sales Engineer: Grace Gao
Email: grace@rsnv.cn
WhatsApp: +86 199 2997 5286
Request A quick Quote（WhatsApp/wechat:+86-19929975286）
