Literally, laser refers to the amplification of light by stimulated radiation. When a beam of light passes through an object, stimulated radiation can occur under certain special conditions, and the radiated light is exactly the same as the incident light. This process is like amplifying the incident light through a light cloning machine. Because of its unique optical characteristics, laser is also known as "the brightest light", "the most accurate ruler" and "the fastest knife".

As one of the great inventions of mankind in the 20th century, laser has been integrated into all aspects of economy and society. Light has been widely used in optical fiber communication, beauty, printing, ophthalmic surgery, weapons and ranging.

Laser processing is the basis of laser processing. The instantaneous melting and gasification of processing materials under the irradiation of laser engraving can make laser engraving achieve the purpose of processing. Laser engraving technology first began in the 1960s. The first generation of carbon dioxide laser engraving machine actually uses laser as the magnifying ruler of light pen and uses one foot to step on the switch to control the light pen. It can be used to copy calligraphy, curve images and portraits. The laser engraves an image similar to the original on the workpiece. This is a simple and original carbon dioxide laser engraving machine with low cost.