CO2 Laser Lens

CO2 laser lenses are critical optical components in CO2 laser systems, designed to focus infrared laser beams (10.6 μm) onto materials with high precision. Fabricated from materials such as zinc selenide (ZnSe) or germanium (Ge), these lenses enable accurate energy delivery in applications like cutting, engraving, and marking, ensuring clean...

CO2 Laser Lens Types

CO2 laser lenses are categorized based on material, shape, and focal length, each optimized for specific performance requirements.

Material Classification

Zinc Selenide (ZnSe) Lenses

Compatibility: Suitable for most CO₂ lasers.
Advantages: High transmittance, low absorption loss, and resistance to high-power lasers.
Applications: Industrial laser processing (cutting/welding), medical CO₂ laser therapy, infrared thermal imaging, and gas analysis.

Germanium (Ge) Lenses

Compatibility: Optimized for high-power pulsed lasers.
Advantages: High refractive index (n≈4.0), broad infrared transmission range, and wear resistance.
Applications: Infrared thermal imaging, laser rangefinding, night vision devices, and industrial infrared laser processing.

Gallium Arsenide (GaAs) Lenses

Compatibility: Designed for mid- to far-infrared lasers (e.g., CO₂ lasers, quantum cascade lasers).
Advantages: High refractive index, thermal stability, and resistance to laser-induced damage.
Applications: Industrial cutting, medical laser surgery, gas detection, and military infrared systems.

Shape Classification

Meniscus Lenses (Most Popular):
- Double-curved surfaces minimize spherical aberration.
- Suitable for both cutting and engraving.
Plano-Convex Lenses:
- One flat and one curved surface.
- Cost-effective and optimized for engraving rather than thick-section cutting.
Aspheric Lenses:
- Designed to reduce distortion and achieve precise beam focusing.
- Higher cost, best suited for high-precision applications.

CO2 Laser Lens Focal Length

Focal Length	Applications
1.5" (38.1 mm)	Fine engraving and detailed marking
2" (50.8 mm)	Standard cutting/engraving
2.5" (63.5 mm)	Medium-depth cutting
4" (101.6 mm)	Deep cutting on uneven surfaces

How to Clean CO2 Laser Lens？

Power Off: Ensure the laser system is turned off and unplugged for safety.
Gloves and Dust Removal: Wear powder-free gloves and use a lens blower to remove loose particles.
Cleaning Solution Application: Apply a few drops of lens-specific cleaning solution (e.g., acetone or isopropyl alcohol) to a lint-free lens tissue.
Gentle Wiping: Wipe from the center outward in a circular motion, avoiding excessive pressure.
Inspection: Examine the lens under appropriate lighting. Repeat if residue remains.

⚠️ Critical Tips:

Avoid: Household tissues, paper towels, or breath-based cleaning, which risk scratches or contamination.
Frequency: Clean after each use and every 10–20 hours of operation to prevent power loss and beam distortion.