KOREAN | SITEMAP
 
 
 
 
 
 
 
When processing of the laser cutting,
welding, punching or marking, the
incidence laser beam on a surface
of materials has a very high energy
density. Laser beams on the surface
of materials is reflected by the reflection
of materials or absorbed by exponential
decaying rate of light intensity. At the time,
Laser beams can change to heat energy
and increase the material temperature.
From this phenomenon, We obtain the
high temperature near a laser spot and
laser processing is possible.
- The reflection rate on a surface
   of materials    is a important
   quantity to decide the laser
   processing.
- Reflection rate is various
   according to the wavelength
   of laser light, material types,
   surface state.
- Generally the reflection rate of
   a metal is higher than the
   ceramic, plastic, and trees.
- Absorption coefficient decides how fast the laser energy decays at the penetration of
   a material.
   (Absorption coefficient) 1 / wavelength

   From this formula, a ultraviolet light has a high absorption rate and a infrared light has
    a low absorption rate.
   The temperature of a surface is very fast increasing on the material of the high absorption
    coefficient

- From this formula, we can define the penetration depth,
   Penetration depth = 1 / absorption coefficient

   Penetration depth of a laser light on a surface of materials
   Laser processing is only possible within the penetration depth.