Why the optical fiber laser marking machine marking effect of uneven?

by:cycjet     2020-08-13
Why the optical fiber laser marking machine marking effect of uneven? Why the optical fiber laser marking machine marking effect of uneven? People liters laser below small make up several simple to talk about some common situations. 1, laser speckle obscured, the output beam vibration through the field lens or mirror out disadvantages: (1). May the lens with injury, so will cause out of the laser beam laser energy. ②。 Laser field lens, galvanometer, jig for good, will lead to some flare obscured, after field lens focused on the frequency doubling piece of light spot is a circle, it leads to effect is not uniform. Why the optical fiber laser marking machine marking effect of uneven? 2, the partial JiaoBiao carved in a certain range of artifacts: each focus lens has its corresponding depth of focus, if the focus is not good, will lead to the effect of non-uniform carving. 3, cabinet for placement level, make the galvanometer, field lens and not parallel processing mesa, which leads to beam out after the length is differ, processing effect caused by uneven. 4, thermal lens phenomenon: when the laser through the optical lens ( Refraction, reflection) , lens fever causes slight deformation, the deformation can make the laser focus focus, shorter focal length. If the machine is fixed, adjust the distance to the focus, the laser after a period of time, made by a thermal lens effect on the material of the laser energy density changes, resulting in engraving effect is not uniform. 5, the material reason, if the same batch do not match the product material produced by the physical and chemical changes will also be different, the material is more sensitive for the response of the laser, usually effect is always the same material, but material inconsistency will lead to the effect of the product produce deviation, because each material would be acceptable to the laser energy is different, this will lead to products appear uneven phenomenon.
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