https://www.raylasers.com/collections/cloudray-overseas-warehouse/products/copy-of-cloudray-co2-laser-usa-cvd-znse-meniscus-focus-lens-usa-warehouse

Schematic Diagram of Laser Light Path

In general,a laser machine needs 1 pcs focusing lens and 3 pcs mirrors

How to Determine Focal Length

Raylasers Test Process

Cleaning instruction

1.Use an air bulb to blow off any loose contaminants. (dust, lint particles)
2. Squeeze a few drops of acetone onto the lens tissue, wetting the complete optic’s diameter. (smudges, fingerprints)
3. Using the cotton swab and distilled vinegar, wipe the lens. Immediately use a wet cotton swab to remove any acetic acid, then clean with a clean dry cotton swab. (spittle, oils)

Packing List—Sample Photo