Laser linssikitti 4"

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What is a laser lens?
The laser lens is the optical element of your machine that focuses the laser beam. The laser beam is between 8 and10 mm in diameter before the lens. The lens concentrates the beam at a thin
point for greater precision and more concentrated power. This point is called the focal point.
Choosing a focal length defines the diameter of the laser spot and therefore the width of the engraving line.
The focal length also defines the focus depth, the distance over which the beam is considered to be focused. The depth of field is used to define the acceptable difference in flatness on a part for uniform engraving