The cutting operation of a glass cutting machine with a rearview mirror is different that of a general glass cutting machine. Because the laser power density has a great influence on the cutting speed, the choice of lens focal length is an important issue. The spot size after laser focusing is proportional to the lens short beam focal length of the lens. The spot size after focusing is small, the focus of the power density is very high, the cutting material is very good, but its disadvantage is that the short depth of field adjustment margin is very small, generally suitable for Cutting thin materials at high speed. Because the long focal length lens has a wider depth of focus, as long as there is sufficient power density, it is suitable for cutting thick workpieces.
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