With the continuous progress of laser application technology, the use of laser to print various dazzling colors on stainless steel has gradually entered people's vision. Are there any traces of these seemingly ethereal and fantastic colors to follow? How to adjust the parameters to get the desired color quickly? What are the requirements for laser light source in this application? And follow in the footsteps of Xiao Bian to enter the wonderful world of MOPA laser stainless steel color marking, and have a look!

Color rendering principle of stainless steel

The reason why people's eyes can distinguish different colors is that when light shines on the surface of an object, it reflects light of different wavelengths. These different wavelengths of light are captured by the naked eye cells. After being processed and distinguished by the brain, different colors are produced. Returning to the material of stainless steel, all kinds of colors can be obtained after laser treatment. The reason is the same.

Analyzing the principle of color development of stainless steel from its physical properties, there are no more than three ways for stainless steel to change before and after laser processing: first, to generate colored oxides; Second, under the action of chemistry, electrochemistry or laser, an extremely thin colorless transparent oxide film is formed on the stainless steel surface, which can show color on the surface if the oxide film has interference effect; Third, there is a mixed state of colored oxide and oxide film.

MOPA laser stainless steel color marking

The advantage of MOPA laser is that its pulse width and frequency are independently adjustable. Adjusting one of them will not affect other laser parameters, which is not available for Q-switch lasers. This characteristic of MOPA structure brings infinite possibilities for stainless steel color marking. In the actual marking operation, pulse width, frequency, power, speed, filling mode, filling spacing, delay parameters and other factors will affect the color effect. The influence of these parameters will make the characteristics of color change not unique, but also interrelated and mutually affected.

The pulse width and frequency are the characteristics of MOPA lasers, which are independent and adjustable; Moreover, these two parameters are also the most characteristic parameters in stainless steel color playing. Their mutual cooperation can bring out a colorful world.