Ultraviolet protection has been paid full attention, skin sunburn, skin tanning and skin photoaging have become research hotspots, a new scientific field is forming, and the concept of "phototherapy medicine" is coming to the fore.

The development of laser beauty instrument has roughly experienced three stages:

Basic research stage (1960s): 1960 Maiman introduced the first meaningful laser to clinic, which included a ruby, which could emit laser with the wavelength of 694nm. 196 1 welding detached retina with ruby laser. From 65438 to 0963, Goldman L began to apply ruby laser to the treatment of benign skin lesions and tattoos and achieved success. 1965 Goldman Sachs reported that it is very easy to effectively remove tattoos with ruby laser, leaving no scars after treatment; After that, ND:YAG laser was used to eliminate tattoos and treat superficial vascular malformation. 1968 Nd:YAG laser developed in Shanghai.

Clinical application stage (1970s): 1970, Goldman L and others used continuous CO2 laser to treat basal cell carcinoma and cutaneous hemangioma for the first time. Due to the continuous provision of effective laser power and energy density, the shortcomings of low power and low efficiency of early pulsed laser were overcome, thus setting off the first upsurge of laser medical treatment at home and abroad.

Mature stage (90' s): In the early 90' s, Q-switched laser was used to treat pigmented diseases, such as Ota's nevus and tattoo, and almost perfect therapeutic effect was achieved. In the middle and late 1990s, 532nm laser with variable pulse width also achieved good results in the treatment of vascular diseases. At this time, advanced laser beauty instruments from the United States, Israel, Germany and other countries have been rapidly introduced into China and become popular. Some domestic laser beauty instruments have also been used more and more in China, gradually replacing the leading position of foreign products.