Features and components of UV laser marking machine

Ultraviolet laser marking machine belongs to cold working mode, and its processing accuracy is higher than that of visible light and infrared band lasers, and under the same conditions, the shorter the wavelength, the smaller the focused spot (the shorter the wavelength, the greater the energy of a single photon). Visible light and infrared band lasers rely on thermal effect to evaporate materials for marking, while ultraviolet lasers can directly break the chemical bonds of materials, so that molecules can be separated from objects, the processing heat affected area is small, and ultra-fine and special materials can be marked. Because this marking method has almost no thermal influence, it is called laser cold working marking.

The UV laser marking machine is mainly composed of laser power supply, UV laser, galvanometer scanning system, focusing system, etc.

1. The laser power supply provides electrical excitation for the laser pump source and Q-switching system.

2. Ultraviolet laser provides stable ultraviolet laser for laser marking machine. The output wavelength of the laser is 355 nm, the output power is greater than 5 W, the pulse width is adjustable from 10 to 40 ns, the output beam quality is the fundamental mode output, and the repetition frequency is 10 to 50 kHz.

3. The galvanometer scanning system consists of two optical galvanometers in the X and Y directions and the corresponding servo control system. The computer sends out digital signals to control the servo motor to generate the scanning track.

4. The function of the focusing system is to focus a parallel laser beam at one point to enhance the power density of the laser. The focal length of the lens of the focusing system is different, and the marking effect and range are also different. The corresponding lens can be selected according to the needs.

5. The marking controller controls the laser marking machine, and uses the USB interface to connect with the computer, and realizes the control of the laser and galvanometer scanning system through digital signals.

6. The computer control system controls the entire UV laser marking machine, and completes the marking of the workpiece by controlling the acousto-optic Q-switching system and the galvanometer system.

(This article is edited by the editor, please be sure to indicate the source:)

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