Laser is the 20th century, after the atomic energy computer semiconductor, another major development of mankind,. They are called "the fastest knife", "the most accurate ruler", "the brightest light" and "the strange laser". Its brightness is about 10 billion times that of sunlight.
The principle of laser was discovered by the famous American physicist Einstein in 1916, but it was not until 1960 that the laser was successfully manufactured for the first time. Lasers came into being in the context of the urgent need for theoretical preparation and production practice. As soon as it came out, it gained extraordinary rapid development. The development of laser not only revitalized ancient optical science and optical technology, but also led to The emergence of a whole new industry. Lasers enable people to effectively use unprecedented advanced methods and means to achieve unprecedented benefits and results, thereby promoting the development of productivity.
