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The Principle And Advantages Of Laser Cleaning Technology
- Mar 12, 2018 -

In industrial cleaning, there are a variety of traditional cleaning methods, most of which use chemicals and mechanical methods.

There are mainly mechanical cleaning、chemical cleaning, and ultrasonic cleaning,at present, these three cleaning methods dominate the cleaning market in China, but their application is severely limited under the requirements of environmental protection and high precision.

Mechanical cleaning can not meet the needs of high precision cleaning, easily damage workpiece surface.

Chemical cleaning easily leads to environmental pollution and the obtained cleanliness is also limited. Especially when the dirt components are complex, multiple cleaning agents must be used repeatedly to meet the requirements for surface cleanliness.

Although the ultrasonic cleaning has good cleaning effect, it is incapable of cleaning the submicron-sized particles. The size of the cleaning tank limits the range and complexity of the processed parts, and the drying of the workpiece after cleaning is also a major problem.

As people's awareness of environmental protection and safety increases, national environmental protection laws and regulations are increasingly stringent, and the types of chemicals that can be used in industrial production and cleaning will become less and less.

In this case, laser cleaning technology is gradually replacing the traditional cleaning technology because of its unmatched advantages over traditional cleaning technology.


Laser cleaning has the cleaning charactericstics of non-abrasive, non-contact, non-thermal effects and suitable for various materials objects, which is considered to be the most reliable and most effective solution.

Laser cleaning principle

Laser irradiate the surface of cleaned objects can produce at leat 3 effects:

  1. Thermal expansion effect

That is, by using the difference in the absorption coefficient of the laser energy of a certain wavelength between the substrate and the surface contaminant, the substrate material and the surface dirt absorb energy to generate thermal expansion. When the expansion force of the dirt is greater than the adsorption force of the dirt to the substrate, the dirt will separate from the objects'surface;

2. Light decomposition or phase transition of molecules

The laser can achieve high concentration of energy in time and space. The focused laser beam can generate high temperatures of several thousand degrees or even tens of thousands of degrees in the vicinity of the focal point, so that the dirt instantaneously vaporizes, vaporizes, or decomposes;

3. Laser pulse vibration

Using a high-frequency pulsed laser to irradiate the surface of samples, the laser beam can generate ultrasonic waves on a solid surface and generate mechanical resonance to distintegrate the dirt layer or condensate.


The advantages of laser cleaning

More environmentally friendly: no need any chemical and leaner.The cleaned waste is basically solid powder, small in size, easy to store, recyclable, free of photochemical reactions, and free of pollution. 

Good effect: The non-abrasive, non-contact and non-thermal effects of laser cleaning will not cause mechanical force on the object being cleaned, will not damage the surface of the object, will not damage the substrate, and will not cause secondary pollution. 

Easy to control: The laser can be transmitted through the optical fiber and cooperate with the robot to achieve long-distance operation. It can clean complex structural parts that are not easily achieved by traditional methods. This characteristic also makes the operator's safety more secure in some dangerous places.

Use widely: Laser cleaning can remove various types of contaminants on the surface of various materials to achieve the cleanliness that conventional cleaning cannot achieve. It is also possible to selectively clean the surface of the material without damaging the surface of the material.

Low cost: The initial investment of the laser cleaning system is high, but it can be used stably for a long period of time. The service life is as long as 10 years. The operation cost is low, the speed is fast, the efficiency is high, the time is saved, and the investment return can be obtained very quickly. In the long run, the cost ratio is lower. Traditional methods of cleaning are lower.

Maxphotonics MFP Q-switched fiber laser source

MFP acousto-optic Q-switched fiber laser is a high-efficiency, high-reliability and high-performance pulsed fiber lasers developed by Maxphotonics Laser. The wavelength range is 1060nm. It is easy to operate, automatically adapts to user needs, and is maintenance-free as a whole. It can be directly integrated into users equipment. Compact structure, with optical fiber isolator output. It is an ideal laser for laser cleaning.

The MFP acousto-optic Q-switched fiber laser is used for laser cleaning and is available in 50W/100W/200W.


Narrow light pulse, high peak power, wide repetition frequency range

High reliability, long life time

High beam quality and stability

Adjustable power, wider range of application

Can be used in automobile manufacturing, machining, electronic processing, cultural relics repair, mold manufacturing, shipbuilding, food processing, petrochemical and other industries.