In order to protect the internal optical path and core components of the fiber laser cutting head from damage, the cutting head needs to be equipped with protective lenses. The cleanliness of the protective lens will directly affect the processing performance and quality of the fiber laser cutting machine. If the lens is dirty, it will not only affect the cutting effect and efficiency, but also cause the internal parts of the cutting head and laser output head to burn out. Therefore, the choice of protective lenses is very important.

 

The processing of protective lenses for fiber laser cutting machines has special process requirements. In order to reduce costs, inferior protective lenses are made of ordinary materials, which will lead to poor light transmittance, poor heat resistance, easy breakage, and cannot withstand the penetrating power of laser light. Poor-quality protective lenses will increase the absorption rate of the laser, and after long-term continuous exposure, the temperature will rise and thermal deformation will occur, which will cause thermal lens effects and lead to focus drift of the cutting head.

 

Poor-quality protective lenses have poor resistance to dust and splashes, and are prone to burning spots, which will directly lead to lens burn-through. Powder particles can contaminate the entire laser cutting head, damaging core high-value components including focusing lenses and sensors. The maintenance cost of the laser cutting head is very high, and it will delay the production and processing of metal projects, causing great economic losses to the workshop.

 

The use of inferior protective mirrors will not only affect the service life of the fiber laser cutting head, but also cause machine failures and lead to downtime, thereby reducing the efficiency of the factory. Therefore, when purchasing protective lenses, be sure to choose high-quality lenses with good material, high light transmittance and low thermal expansion coefficient. When the lens becomes dirty during processing, clean or replace the lens in time.