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How to prevent further contamination of the laser protection sheet

During laser work, due to the laser cutting, welding, and heat treatment of materials, a large amount of gas and spatters will be released on the working surface, and these gases and spatters will cause damage to the lens. When contaminants fall on the surface of the lens, it will absorb energy from the laser beam, causing a thermal lens effect. If the lens has not yet formed thermal stress, the operator can remove it and clean it. The specific operation should adopt a method that can avoid damage to the lens and further pollution. During the installation and cleaning of the lens, any sticky matter, even fingerprints or oil drops, will increase the absorption rate of the lens and reduce the service life.

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Therefore, the following precautions must be taken:

1. Never install the lens with bare fingers. Wear finger cots or rubber gloves.
2. Do not use sharp instruments to avoid scratches on the lens surface.
3. Do not touch the film when taking the lens, but hold the edge of the lens.
4. The lens should be placed in a dry and tidy place for testing and cleaning. A good workbench should have several layers of cleaning paper towels or wiping cloths, and several sheets of lens cleaning tissues.
5. The user should avoid talking to the top of the lens, and keep food, beverages and other potential pollutants away from the work environment.

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Correct cleaning method
In the process of cleaning the lens, the only purpose is to remove the contaminants of the lens, and not to cause further pollution and damage to the lens. In order to achieve this goal, people should often adopt relatively low-risk methods. The following steps are set up for this purpose and users should adopt them.

The first step: Use an air ball (compressed nitrogen) to blow off the floats on the surface of the element, especially the lens with tiny particles and floccules on the surface. This step is necessary. The compressed air on the production line cannot be used directly, because the air will contain oil and water droplets, which will increase the pollution of the lens.

Step 2: Use special cleaning fluid to clean the lens lightly. This level of special cleaning fluid is almost anhydrous, which reduces the possibility of lens contamination. The reagent can be a mixed solution of acetone, ethanol and ether, or a special optical glass cleaning solution on the market. For cleaning, first use absorbent cotton balls to further remove floating dust on the surface, and then thoroughly clean the lens with dust-free paper.

Raytool head window Supplier China CARMAN HAAS reminds if certain pollutants and lens damage cannot be removed by cleaning, especially the film burned due to metal splash and dirt, then you need to replace the protection if you want to restore the good performance of the equipment lens. When replacing the protective lens, if any dirt is found, the lens needs to be cleaned.