The types of laser markers vary according to the wavelength of the laser light, as well as the objects that can be mark.
The feel of the finish of each marking process will also vary, so the ideal pattern will vary depending on the purpose of the application.
- YVO 4 / fiber laser marker
- CO 2 Laser Marker
- Green laser marker
- UV laser marker
The IR wavelength, which is short for infrared radiation, is the most versatile wavelength of light for laser processing.
As the name implies, the infrared range begins where the red range ends, and being longer than 780 nm, the wavelengths of IR light are not visible to the human eye. (The infrared range covers the wavelength range of 700 nm to 1 mm.)
Typical Characteristics of 1064nm Wavelength Range Lasers
- A wide range of processing applications, from plastics to metals
- It cannot process transparent objects such as glass, as the laser passes through them.
- Easily create contrast on plastics.
Even with similar wavelengths, the characteristics of the beam will vary depending on the oscillation method.
In general, the higher the peak power and the shorter the pulse duration, the stronger the instantaneous energy, ensuring less thermal damage and ability to avoid burns.
CO 2 lasers have a wavelength 10 times longer than a YAG, YVO4 or fiber laser. This is the longest wavelength among commonly use industrial lasers.
As the name implies, a CO 2 laser is a gas laser made from carbon dioxide. Such lasers are use for processing and marking machines.
Typical characteristics of 10,600 nm wavelength range lasers
- Not well absorb on metals
- Because of their long wavelengths and the ease with which heat can be transfer, they can melt or burn.
- It allows the processing of transparent objects such as glass and PET.
- Compare to the standard wavelength, process plastics tend to be less stain.
Lasers with half the standard wavelength (1,064 nm) are call SHG (second harmonic generation) lasers.
Because a wavelength of 532 nm will be green in the visible light range, these lasers are also known as green lasers. The standard wavelength produce from a YAG or YVO 4 laser is alter when passing through an oxide single crystal (LBO: lithium borate).
Laser Marking System is a type of Industrial Date Code Printer.
Typical Characteristics of 532nm Wavelength Range Lasers
- Thanks to a high absorption rate for various materials, 532 nm lasers facilitate processing, even of highly reflective objects such as gold or copper.
- The diameter of the beam is also narrower than a standard wavelength laser, making detail processing possible.
- Light with this wavelength will penetrate glass and other transparent materials, so processing of such materials is generally impossible.
- This wavelength is not prone to causing heat stress to objects.V laser marker
With a third of the standard wavelength (1064nm), UV lasers are call THG (Third Harmonic Generation) lasers. Furthermore, this wavelength falls within the ultraviolet range, hence the name “UV laser”. To produce a UV laser, a standard wavelength laser is pass through a non-linear crystal, creating a wavelength of 532 nm. This convert wavelength is then pass through another crystal, resulting in a wavelength of 355 nm.
Thanks to their high absorption rate in various materials and the absence of thermal stress, lasers of this wavelength can be use for detail processing applications that require high quality.
Typical Characteristics of 355nm Wavelength Range Lasers
- The absorption rate is higher than that of a green laser, allowing good coloring and marking without damage, for a wide variety of materials.
- High reflectance objects such as gold and copper can be mark and process with minimal thermal influence.
- It enables narrower beam diameters than a green laser, allowing for more detail marking and processing.