76.2mm (3") ZnSe CO2 Laser Focus Lens – 20mm Diameter

This 76.2mm (3-inch) CO2 laser focus lens is designed for cutting and engraving applications where a longer focal length and greater depth of focus are beneficial. Made from zinc selenide (ZnSe), the lens focuses the laser beam onto the material for processing at the standard 10.6µm CO2 laser wavelength.

The 3-inch focal length is a practical choice for thicker materials and applications requiring additional working clearance. It provides a greater depth of focus than shorter focal length lenses, although very fine engraving details may benefit from a shorter lens.

Key Features

• 3-Inch Focal Length: Provides a greater depth of focus for cutting applications and materials with varying surface heights.
• Zinc Selenide Construction: Optical material commonly used to transmit and focus CO2 laser radiation.
• 20mm Diameter: Fits compatible laser focal tube assemblies designed for 20mm lenses.
• Plano-Convex Design: Focuses the incoming laser beam onto the workpiece.
• Replacement Optic: Suitable for servicing or changing the focal length of compatible CO2 laser machines.

Technical Specifications

Compatibility

This lens is intended for compatible CO2 laser cutting and engraving machines that accommodate a 20mm diameter focusing lens and support a 76.2mm focal length.

Before ordering, verify your current lens diameter, focal length, focal tube dimensions, and available focusing adjustment. Changing focal lengths may require adjusting the focal tube or nozzle configuration.

Handling & Maintenance

Handle the lens by its edges using appropriate protective gloves. Avoid touching either optical surface, and inspect regularly for contamination, scratches, or damage. Clean only with products and procedures approved for ZnSe laser optics.

Always power down the laser and follow proper safety procedures before servicing optical components. Do not use damaged or cracked lenses.