38.1mm (1.5") ZnSe CO2 Laser Focus Lens – 20mm Diameter

This 38.1mm (1.5-inch) CO2 laser focus lens is designed for detailed engraving and precision work where a small, concentrated laser spot is important. Made from zinc selenide (ZnSe), this lens focuses the laser beam onto the material in compatible CO2 laser engraving and cutting machines operating at a 10.6µm wavelength.

The shorter 1.5-inch focal length makes this lens particularly useful for fine lettering, intricate graphics, and detailed engraving on flat surfaces. It produces a smaller focused spot than longer focal length lenses under comparable conditions, although its shallower depth of focus makes it less suitable for thick materials or uneven surfaces.

Key Features

• 1.5-Inch Focal Length: Designed for applications requiring fine engraving detail and a concentrated laser spot.
• Fine Detail Engraving: Well suited for small text, detailed graphics, and intricate designs.
• Zinc Selenide Construction: Optical material commonly used for transmitting and focusing CO2 laser radiation.
• 20mm Diameter: Fits compatible focal tube assemblies designed for 20mm lenses.
• Plano-Convex Design: Focuses the laser beam onto the workpiece.
• Thin Material Processing: Suitable for precision engraving and cutting applications involving relatively thin materials.

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 38.1mm focal length.

Before ordering, verify your existing lens diameter, focal length, focal tube dimensions, and available focusing adjustment. Shorter focal lengths reduce the working distance between the lens and material, so proper nozzle clearance and focusing capability are important.

Handling & Maintenance

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

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