Lenses

Laser Maintenance: How to clean laser focus lenses

Josh Stephens is the owner of Lasers Plus. Formerly, he was the lead applications expert for Trotec Laser. He has been in the industry for over seven years.

Perfect engraving and cutting results require perfectly cleaned optics, especially when working with wood or rubber, which produce more dust than other applications. To ensure the quality of the laser engraving or cutting, you should check and clean the lenses and mirrors regularly.

It takes no more than two minutes per day to keep the optics clean. Start by visually inspecting the lens and the mirror on the machining head once a day. Check the side mirrors once a month. 

It is a good idea to set fixed times for visual inspections. For example, check the lens every morning and inspect the side mirrors on the first day of the month. 

Clean the lens whenever you see dirt on it to improve the quality of the laser engraving or cutting and to prevent the lens from breaking.

Start by blowing off lint and dust with a blower or compressed air. Have some detergent wipes on hand. (Image 1) Move the working table upward. If the lens falls down during removal, it will not fall far or break easily.

Next, remove the lens and rinse it with cleaning fluid. Place a drop of cleaning fluid on the lens and leave it on for about one minute. Wipe it off with a moist cleaning cloth. (Image 2)

Now the lens is impeccably clean again and ready for the next application. When cleaning the mirror, you can take the same steps.

The lenses and mirrors are fragile, so handle them with care. Avoid touching the lens with your fingers or with tools, because the danger of scratching the surface is too great.
—Josh Stephens, Trotec Laser