How to choose High-Power 355 nm Ultraviolet Laser cutting lens?

There are many kinds of wearing parts of laser cutting machine. Today, I will mainly introduce you to the protective lens in the laser cutting machine.

As the name suggests, the protective lens is used to prevent dust and slag splash from damaging the focusing lens. In addition to being used in laser cutting machines, it is also necessary in other laser equipment, including laser marking, laser welding and laser engraving, etc. . It can be seen that the application market for protective lenses is very large.

RFH 355NM UV laser

The price of protective lenses on the market varies greatly, ranging from tens of yuan to hundreds of yuan, and the quality is also different. Of course, shoddy lenses are not uncommon. If the lens is not selected properly, it will cause large laser loss, frequent damage to the protective lens, unstable product quality, and cause serious losses to the enterprise. Therefore, choosing the right protective lens is a matter of great importance.

Three steps to choose the protective lens of the laser cutting machine:

1) Matching dimensions, this is easy to understand;

2) Material, according to different laser power, considering the cost of use, you can choose K9, quartz. In the actual application process, professional manufacturers divide these two types of materials into multiple grades, and customers can choose the corresponding specifications according to actual needs.

3) Coating, laser anti-reflection coating, different coating technical parameters are adopted according to the use environment.

Although the protective lens of the laser cutting machine is a vulnerable part, in order to improve its utilization rate and reduce production costs, the protective lens can be cleaned regularly to achieve the purpose of reuse. The following are the three cleaning steps summarized by the high-energy laser:

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UV laser cutting machine

1. The protective lens material is ZnSe (arsenic zinc), which is brittle and afraid of falling; pay attention to when disassembling: do not use too much force or collide with hard objects. There is an antireflection film on the surface, which is afraid of pollution, humidity, oiliness, and scratching; therefore, it is required to provide dry and degreasing air during work. Do not directly handle the laser cutting machine to protect the lens of the lens, because the skin is oily Will cause permanent damage to the lens surface. On the contrary, you can wear gloves and its special set for operation. For smaller lenses, it is more convenient to use optical tweezers or vacuum tweezers. No matter what method is used to clamp the protective lens of the laser cutting machine, it can only be clamped along the non-optical surface, such as the frosted edge of the mirror plaque.

2. Under normal circumstances, it is necessary to check the condition of the laser cutting machine to protect the lens before use and before and after cleaning. Because most contaminants and surface defects are relatively small in size, we often need to use magnifying equipment when inspecting lenses. In addition to magnifying equipment, sometimes we also need to illuminate the optical surface with a relatively bright light to enhance the specular reflection intensity of surface contaminants and defects, so that contaminants and defects can be found more easily.

3. When cleaning a laser cutting machine to protect the lens, always use clean wipes and optical grade solvents to prevent damage by other contaminants. The wipe paper must be moistened with a suitable solvent, and it must not be used dry. In consideration of softness, the usable wipes are pure cotton Webril wipes or applicators such as cotton balls, lens tissues, and cotton swabs.