More about lenses - nortd/lasersaur GitHub Wiki

See also https://lasersaur.cc/manual/operation => Consumables => Lens

Buying lenses

For the 14.03 lasersaur, you need a 25 or 25.4mm (~1") diameter ZnSe CO2 (10.6 um wavelength) laser lens with a 73.3mm (~3") back focal length.

Differences exist between phyisical vapour deposition and chemical vapour deposition lens coatings. Judging from the price, cvd is more appropriate and expensive for our purposes.

Examples (*):

• https://www.aliexpress.com/store/product/CVD-ZnSe-Co2-laser-focus-lens-Diameter-25-4mm-focus-length-76-2mm-thickness-2mm/1240844_1929646605.html
• https://www.aliexpress.com/store/product/PVD-ZnSe-Co2-laser-focus-lens-Diameter-25-4mm-focus-length-76-2mm-thickness-2mm/1240844_1929635781.html

(*) I am not affiliated with this supplier and have not tested the quality of their offerings.

Cleaning lenses

https://www.dmphotonics.com/ZnSe_optics/ZnSe%20optics%20cleaning.htm