Diagram of working principle of fiber laser marking machine
Fiber laser marking machine is mainly composed of fiber laser, vibrating lens, field lens, marking card, etc. The laser light source is provided by fiber laser, which is expanded by fiber and imported into scanning galvanometer On the XY mirror, the marking software, the scanning galvanometer and the laser are combined and controlled to mark permanent text or patterns on the workpiece.
The laser consists of a working medium and a pump source enclosed in a pump cavity. The pump source 'pumps' the working medium from the energy ground state to the excited state. If the 'population inversion' is achieved between the two excitation energy levels, stimulated radiation (ie photons) can be generated, which can be amplified by resonating in an optical cavity and reflecting back and forth. A part of the amplified electromagnetic radiation is output to form a laser .
The fiber laser introduces a 1064nm high-power laser directly into the processing surface through a soft single-mode fiber with a sheath, and the spot size after collimation and focusing can reach several Ten micrometers or less, this kind of laser close to the diffraction limit can be used for marking, drilling or processing various materials.
The effects of laser marking machine include the following three types:
1. The surface layer of the target substance is exposed by the laser (light energy) to evaporate the deep layer of the substance;
2, the surface material is chemically generated by the laser (light energy), Physical changes, and'carve' the required pattern text;
3. Burn off part of the material by laser (light energy), thereby revealing the required etching pattern, Word.
To put it simply, the working principle of the fiber laser marking machine is roughly as follows: it is controlled by the marking system and uses a fiber laser to generate laser light. The field lens converges, and finally the laser beam acts on the surface of the workpiece to realize marking on the workpiece.
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