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

This Premium 76.2mm (3-inch) CO2 laser focus lens is designed for cutting and engraving applications where greater depth of focus and consistent beam focusing are important. Constructed from zinc selenide (ZnSe), this lens is intended for compatible CO2 laser machines operating at a 10.6µm wavelength.

The 3-inch focal length provides a practical balance between cutting performance, working clearance, and engraving detail. Compared with shorter focal length lenses, it offers greater depth of focus, making it useful for moderately thick materials and applications involving slight variations in material height.

Key Features

• 3-Inch Focal Length: Provides increased depth of focus for cutting and engraving applications.
• Versatile Cutting Performance: Suitable for moderately thick materials where additional focusing tolerance is beneficial.
• Zinc Selenide Optics: Infrared optical material used to transmit and focus CO2 laser radiation.
• 20mm Diameter: Designed for compatible focal tube assemblies that accept 20mm lenses.
• Plano-Convex Design: Focuses the incoming laser beam onto the workpiece.
• General Cutting & Engraving: Offers a balance of engraving detail, working clearance, and cutting depth.

Technical Specifications

Compatibility

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

Before ordering, verify your existing lens diameter, focal length, focal tube dimensions, and available focusing adjustment. Changing focal lengths may require a different focal tube or nozzle configuration to maintain proper focus and air assist positioning.

Actual cutting performance depends on laser power, material type, thickness, and machine 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 machine before servicing optical components. Do not use damaged or cracked lenses.