The common field lens laser marking machine has 50*50mm, 110*110mm, 160*160mm, 220*220mm, 300*300mm, 500*500mm and so on.To use different field lens is to choose different focal lengths.There are several factors: the size of the marking area and the marking material; the degree of precision required and the overall matching of equipment.
The focal length has a certain relationship with the working distance.But the focal length is not equal to the working distance.When the object is relatively large and the marking range is enlarged, the lens required is also relatively large.Manufacturers usually like a wide range of scanning .Warm reminding: blindly increasing the scanning area, there will be a lot of problems.That is to say, when the scanning area reaches a certain size, the light spot would become large and does not gather in a fine way. The spot would become larger and the distortion would happen. It would inevitably lead to the loss of laser energy because the power density of the laser decreases rapidly and the working distance lengthenes.It is not good to a precise process.
In addition, the selection of focal length is also to consider the configuration of your equipment. If your equipment is a 10W optical fiber marking machine,
I would recommend you that you'd better not to use those lens which are more than 300*300mm. The larger the laser lens, the more laser consumption.Then the quality of light beam would be not very well, marking effect would also decline.
If you have any question about handling laser machine, come to contact us.We will try our best to help you. BOGONG , a specialist in laser marking machine.
Rita Wang
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