In the laser marking machine, after the laser is shaped by the laser, it will be irradiated to the focusing field lens as a parallel beam. Most of the conventional laser marking machine equipment is used as a convex lens.The convex lens passes through the optical refraction angle and focuses the parallel-plane optical fiber to a point, forming a focusing surface. The vertical distance of the back focal length plane of the optical center point of the convex lens is what we call the focal length.Usually we will use F to represent the focal length. Most of the laser marking machines will have a mark on the focusing field lens.For example: F=163;F=254 and so on.
Shandong GX Laser CNC Machinery CO.,Ltd
5st ,Nov,2020
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