20mm CO2 Laser Lens
Original SANNI 20mm diameter Plano-Convex optical focusing lens with 50.8 mm (2.0") focal length. Engineered with double-sided 10.6 µm anti-reflective coating, >99.5% transmission, and ultra-fine beam focal spot for razor-sharp cutting and photo engraving.
- check_circle 20 mm Precise Outer Diameter: Fits standard laser head retaining rings with ±0.05 mm diameter tolerance.
- check_circle 50.8 mm (2.0") Ideal Focal Length: The industry benchmark sweet spot for both fine engraving and deep cutting.
- check_circle Plano-Convex Surface Figure: Produces a tight, round focused beam spot for ultra-narrow kerf widths.
- check_circle Double-Sided 10.6 µm AR Coating: Minimizes back-reflection and ensures ≥99.5% laser energy transmission.
- check_circle High Laser Damage Threshold: Tested to handle high-power CO2 laser bursts up to 150W continuous.
- check_circle 40/20 Scratch-Dig Surface Quality: Flawless surface finish prevents beam scattering and hot-spot degradation.
- check_circle Broad Non-Metal Processing: Excels on acrylic, wood, MDF, leather, paper, foam, rubber, and fabric.
Target Applications & Use Cases
Industrial Applications FitProducing razor-sharp, narrow kerf lines on acrylic displays, MDF craftwork, and architectural models.
Engraving detailed portraits, logos, and micro-text onto wood planks, leather, marble, and coated glass.
Replacing pitted, scratched, burned, or smoke-contaminated lenses in running production machines.
Clean vaporizing cuts without charred edges or smoke stains on sensitive fabrics and leather.
Upgrading stock laser heads to achieve tighter beam focus and faster processing speeds.
Engineering & Production Benefits
Key Operational AdvantagesCreates a microscopic focal waist (<0.1 mm) for crisp photographic detail and minimal material loss.
Low internal absorption prevents heat buildup in the substrate crystal during high-power cutting.
>99.5% light throughput ensures you harness the full cutting energy of your laser tube.
Standard dimensions allow quick swap in under 2 minutes with no nozzle modifications required.
Spare Part Overview & Technical Description
High-Transmittance 20mm Plano-Convex CO2 Laser Focusing Lens
The 20mm CO2 Laser Lens (Model SANNI-FL50.8-D20) is a premium optical component designed for 40W, 60W, 80W, 100W, 130W, and 150W CO2 laser cutting and engraving machines. Manufactured from high-grade optical crystal / CVD Zinc Selenide (ZnSe) with double-sided Anti-Reflective (AR) dielectric coating calibrated precisely for 10.6 µm wavelength, this lens delivers outstanding optical transmittance (>99.5%) while resisting surface absorption and thermal lensing.
Featuring a standard 20 mm outer diameter and 50.8 mm (2.0 inch) focal length, this Plano-Convex lens provides the optimal balance between an ultra-fine focal spot diameter (<0.1 mm) for high-resolution photo engraving and sufficient depth of focus for clean, vertical edge cuts through 10 mm acrylic, MDF, wood, and leather sheets.
Precision Optical & Thermal Characteristics:
- Plano-Convex Optical Geometry: Spherical curvature focuses the incoming collimated laser beam to a diffraction-limited focal waist.
- Advanced Double-Sided AR Coating: Wavelength-matched at 10.6 µm to reduce reflective energy losses to under 0.5%, directing maximum laser power into the workpiece.
- High Thermal Shock Resistance: Capable of withstanding continuous laser energy density from high-output 100W-150W tubes without cracking.
- Universal Laser Head Fit: Direct drop-in fit for standard 1390, 6040, 9060, 1325, and 1610 laser cutting head nozzles.
Full Specifications Sheet
| Specification | Parameter / Value |
|---|---|
| Diameter | 20 mm |
| Focal Length | 50.8 mm (2.0 Inch) |
| Lens Type | Plano Convex |
| Material | Glass / CVD ZnSe Optical Crystal |
| Coating | AR 10.6 µm (Double Sided Anti-Reflective) |
| Light Source Type | Wave (CO2 Laser Infrared) |
| Wave Length Range | 10640 nm (10.6 µm) / 1064 compatibility |
| Diameter Tolerance | 20MM (±0.05 mm) |
| Brand | SANNI |
| Usage/Application | Non Metal Cutting & Engraving |
| Application | CO2 Cutting, CO2 Engraving |
| Laser Power Compatibility | 40W, 60W, 80W, 100W, 130W, 150W |
| Surface Quality | 40/20 Scratch-Dig High Polish |
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