UV Laser Marking Machine: Core Principles, Cold Marking Advantages, and Industrial Application Scenarios
In the field of industrial marking equipment, UV laser marking machines, with their unique 355nm UV processing technology, have become the preferred equipment for precision marking and processing heat-sensitive materials. Their 355nm core wavelength is only one-third that of a typical fiber laser, a key parameter that directly determines their performance advantages over traditional equipment.
1. Core Principle of UV Laser Marking Machines: Third-Harmonic Wavelength Generation Technology
The core principle of UV laser marking machines lies in a specialized crystal wavelength conversion process: a standard 1064nm laser beam is first passed through a nonlinear crystal, reducing its wavelength to 532nm. It then passes through another specialized crystal, further compressing the wavelength to 355nm. Because of this three-step wavelength conversion, these devices are also known in the industry as third-harmonic generation (THG) lasers, forming the technological foundation for high-precision marking.
2. Advantages of UV Laser Marking: The Core Value of Cold Marking Technology
Damage-Free Cold Marking: As a typical "cold marking" device, the short wavelength of a UV laser marking machine significantly increases material absorption and reduces the beam's focal point, enabling high-contrast marking on materials like metal and plastic without thermal damage. It is particularly suitable for heat-sensitive materials (such as thin plastics and glass) and precision components (such as electronic chips and medical devices).
Efficient and Environmentally Friendly Processing: The marking process is accomplished through photon absorption at the molecular level, eliminating the need for heat treatment. The non-contact operation eliminates physical wear on tools, eliminates consumables, and creates no pollution, meeting the environmentally friendly processing requirements of modern industry.
Ultra-High Precision Output: The 355nm UV wavelength has low divergence and excellent beam quality. Combined with advanced optical systems and focusing technology, it ensures uniform energy across the marking area, meeting micron-level precision requirements.
3. UV Laser Marking Machine Applications: Adapting to High-Specification Industrial Needs
Currently, industrial UV laser marking machines are widely used in high-precision processing scenarios across a wide range of fields:
Electronics Industry: QR code/model marking on chips, PCBs, and precision mobile phone components;
Medical Industry: Non-destructive serial number marking on medical devices such as syringes and surgical instruments;
High-end Manufacturing: Precision drilling, material bonding, and intricate logo marking on luxury goods and consumer electronics products.
