During the replacement process, the placement, detection and installation of optical lenses should be careful to prevent the lenses from damage and pollution. After a new lens is installed, it should be cleaned regularly.
When the laser cuts the material, the working surface will release a large amount of gas and splash, which will cause damage to the lens. When pollutants fall on the lens surface, they will absorb energy from the laser beam, resulting in thermal lens effect. If the lens has not formed thermal stress, the operator can disassemble it and clean it.
During the installation and cleaning of the lens, any sticky matter, even oil drops printed on the nail, will improve the absorption rate of the lens and reduce its service life. Therefore, the following precautions must be taken:
1. Never install lenses with bare fingers. Finger cots or rubber gloves should be worn.
2. Do not use sharp instruments to avoid scratching the lens surface.
3. When taking the lens, do not touch the film, but hold the edge of the lens.
4. The lens should be placed in a dry and clean place for inspection and cleaning. A good workbench surface should have several layers of cleaning paper towels, and several sheets of lens cleaning cotton paper.
5. Users should avoid talking over the lens and keep food, drinks and other potential pollutants away from the working environment.
In the process of lens cleaning, the method with relatively low risk shall be adopted. The following operation steps are set up for this purpose, and users should adopt them. It is necessary to blow off the floating objects on the surface of the components with blowing balloons, especially the lenses with tiny particles and flocs on the surface. But do not use the compressed air on the production line, because the air will contain oil mist and water droplets, which will deepen the pollution of the lens.
The second step is to slightly clean the lens with analytical pure acetone. This level of acetone is almost anhydrous, which reduces the possibility of lens contamination.
The cotton ball dipped in acetone must be cleaned under light and moved circularly. Once the cotton swab is dirty, it must be replaced. The cleaning shall be completed at one time to avoid ripples. If the lens has two coated surfaces, such as the lens, each surface needs to be cleaned in this way. The first side needs to be placed on a layer of clean lens paper for protection.
If acetone cannot remove all the dirt, then use acid vinegar for cleaning. The acid and vinegar are used to dissolve the dirt to remove the dirt, but will not cause damage to the optical lens. The vinegar can be experimental grade (diluted to 50% strength), or white vinegar with 6% acetic acid for household use. The cleaning procedure is the same as that of acetone. Then use acetone to remove the acid vinegar and dry the lens. At this time, frequently change the cotton ball to completely absorb the acid and hydrate. Until it is cleaned.
When pollutants and lens damage cannot be removed by cleaning, especially the burnt film caused by metal splash and dirt, the only way to restore good performance is to replace the lens.
