Laser is an acronym for Light Amplification by Stimulated Emission of Radiation, which is called LASER.Unlike ordinary light, light produced by amplifying light and inducing it to the same wavelength has the same wavelength, so there is little diffusion and high output energy can be obtained.Another characteristic of lasers is that they can produce various wavelengths depending on the medium used.We have laser equipment that uses carbon dioxide as the medium, laser equipment that uses YVO4 (yttrium vanadate) crystals, and the latest fiber lasers.Carbon dioxide laser (Co2) is suitable for woodworking materials and acrylic because it emits far-infrared light to burn and process the material, and it is called laser engraving by burning and engraving. The YVO4 laser is suitable Laser marking on metal , non-ferrous metals and colored resins because it emits near-infrared light and collides with material energy for processing. It is called laser marking because the engraving depth is shallow. In recent years, the performance of laser equipment has improved, and laser engraving laser marking technology has been incorporated into many industrial products.I explained on the Marking Types page that there are two types of marking methods, “contact marking” and “non-contact marking”. Among them, we introduced “laser marker” as a non-contact marking method using laser light, but here we will explain the basic principle and features of laser marking, processing examples, and so on.
Laser marking principle:
Laser marking is a method of printing a logo, product name, serial number, model number, etc. by irradiating an object with laser light to melt, burn, peel, oxidize, scrape, or discolor the surface. Such laser marking can be roughly divided into two types: “mask type” and “scan type”.
Mask method:
It is a method that irradiates the surface with laser light and prints only the part that has passed through the mask. High-speed, high-resolution marking is possible, but it is necessary to prepare a mask that matches the printed content. Therefore, there is a demerit that it takes time and cost to print various patterns.
Scan method:
It is a method of irradiating one point of laser light and printing like a single stroke. Specifically, the laser beam emitted from the oscillator is scanned by a scanning mirror and printed on the object. In the past, laser light could only be scanned on a flat surface because it was controlled by two axes of XY, but nowadays, laser markers that can control the height with a Z-axis scanning mirror and mark objects of any three-dimensional shape have appeared. increase.
This scanning mirror is also called a galvano mirror, and a system that scans laser light using one or more mirrors is called a “galvano scanner” or “galvano scanning system”.Click here .Nowadays, the number of cases of marking various types is increasing, and the weak points are compensated by the speeding up of the scanning laser, so the scanning type with a high degree of freedom is becoming common.
Features of Eltec Laser Marking:
We have been nominated and ordered by customers in various industries (industry, government and academia).We will respond promptly from mass production to trial production and uniform product.
As a direct marking without using ink or auxiliary materials, it is environmentally friendly and foreign matter is mixed in.
It also helps prevent troubles.
It is a non-contact marking process that minimizes the load on the material.
Various materials can be supported by appropriately selecting the medium and wavelength.
