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How to deal with severely polluted laser protective windows

Carmanhaas offers protective windows, also known as debris windows that are either As the name suggests, the protection lens is used to prevent dust and slag splash from damaging the focusing lens. To protect scan lenses from backsplatter and other workplace hazards, In addition to being used in laser cutting machines, it is also necessary in other laser equipment. For example: used for laser welding, marking, and engraving to block debris from splashing and prevent splashes from damaging the focusing lens.

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Carmanhaas ZNSE Polished Windows are frequently used in optical systems to separate the environment in one part of the system from another, such as to seal vacuum or high-pressure cells. Because the infrared transmitting material has a high index of refraction, an anti-reflection coating is typically applied to windows to minimize losses due to reflections.

So How to deal with severely polluted laser protective windows?

Severely contaminated or dirty lenses may need to use optical polishing fluid to remove contaminants on the lens surface.

1. Fully shake the polishing liquid container before use. Pour out four to five drops of polishing liquid and place them on a cotton ball. On the surface of the lens that needs to be cleaned, use the weight of the cotton ball to gently move the cotton ball in a circular motion (do not press the cotton ball!). Please keep rotating the lens to avoid excessive polishing in a certain direction. The time used to clean the lens should not exceed half a minute. If you find that the color of the lens surface has changed during this step, it means that the outside of the lens film has been corroded and you should stop cleaning immediately.

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2. After using the polishing liquid, soak an unused cotton swab with distilled water, and then gently wipe the surface of the lens with it, thoroughly wet the surface of the lens, and remove the polishing liquid residue as much as possible. Do not let the lens surface become dry. This will increase the difficulty of removing polishing liquid residues.

3. Quickly moisten a cotton swab with absolute ethanol, and then gently clean the surface of the lens with it. Cover the entire surface with the head of the cotton swab and remove as much polishing liquid residue as possible.

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4. Soak the cotton swab with acetone, and use it to clean the surface of the lens to remove all the absolute ethanol and polishing liquid residue remaining in the cleaning process. When using acetone for the final cleaning, please gently drag the cotton swab on the surface of the lens to wipe away the original traces until the entire surface is wiped clean. Then use the cotton swab to make the last wiping action, moving slowly to ensure that the surface behind the cotton swab can dry immediately, which can eliminate surface streaks. Certain types of pollution or damage (such as metal spatter, potholes, etc.) cannot be removed. If the surface of the lens is contaminated or damaged and cannot be cleaned and restored, the cleaning should be abandoned and replaced with a new lens to ensure the cutting quality.

Carmanhaas offers protective windows, windows that are either included as the overall scan lens assembly part, or sold separately.These plano-plano windows are available in both ZnSe and Ge materials and also supplied mounted or unmounted.