size for: the shorter the focal length, the smaller is the focus, the shorter the depth of focus
also; The longer the focal length, the greater is the focus, with the depth of focus is, the
longer focal size and the depth of focus is a pair of contradiction. Depth of focus is refers
to the laser focus can be formed after the processing capacity of the length of the laser
power concentration areas
the longer the depth of focus on processing thick the better, but this will make the focal
point, and then decreases cutting ability.
the smaller the depth of focus, good for cutting ability, but can make narrowing the focus,
and so on the depth of cut. At the same time, increased smoothness requirements for
processing platform, which is not flatness sensitive platform.
Focus lens selection principle is: in the case of possible, try to use a shorter focal length of
the focusing lens. When cutting speed cannot satisfy the needs of customers, a shorter focal
length of the focusing mirror should be replaced. At the same time, it is recommended that
the customer is equipped with a variety of different focus lens focal length, to adapt to the
different material thickness of the processing requirements.
The right way to focus should be followed:
Focus lens focal length of the reference value, through the experiment many times near this
value, to determine a processing capacity of the strongest points, as to the focal length of
the correct application, even if is the same lens, in the case of different material, material
thickness, the best focus position will change, namely according to different material and
thickness, the coke quantity is different. From coke: focus on the process of laser is a
divergent process after come first, in order to achieve the best cutting ability, focus lens
focus of physical completely with the surface of the material does not necessarily can get
the best processing effect, should according to the different situation, adjust the focus to
the materials of a certain depth, the best processing effect can be obtained, this is from the
focal depth values are obtained, from the amount of coke size and material of the material
and thickness are related.
WWW.INTERLASER.RU
27
