How does UV Laser Marking Machine Work
A UV laser marking machine operates using a high-energy ultraviolet (UV) laser beam to create precise, high-contrast marks on various materials. Here's a breakdown of how it works:
Laser Generation
The machine generates a UV laser beam, typically using a solid-state laser source such as a diode-pumped laser or fiber laser.
The UV wavelength is usually around 355 nm, which is in the ultraviolet spectrum. This short wavelength allows for high precision and minimal heat-affected zones.
2. Beam Focusing
The UV laser beam is directed through a series of mirrors and lenses to focus it into a very fine point.
The focused beam has a small spot size, enabling high-resolution marking.
3. Material Interaction
When the UV laser beam interacts with the material's surface, it causes a photochemical reaction rather than a thermal one. This is because UV light has high photon energy.
The energy from the UV laser breaks the molecular bonds on the material's surface, altering its properties without significant heat generation.
4. Marking Process
The laser beam is controlled by a computer system that follows a pre-programmed design or text.
The beam selectively removes or changes the surface layer of the material, creating marks such as:
Text (e.g., serial numbers, logos)
Graphics
Barcodes or QR codes
The process is non-contact, meaning there is no physical wear on the machine or material.
