Picosecond Laser Removal of Tattoos

Introduction to lattice laser

With the improvement of living standards, people have higher and higher requirements for skin beauty. The emergence of laser beauty meets people’s needs. Traditional skin beauty lasers are divided into Exfoliative and non exfoliative. Non exfoliative lasers are safe, less invasive and fast recovery, but the curative effect is slightly poor. Exfoliative laser vaporizes the epidermis and regenerates the epidermis by relying on the repair ability of the body. At the same time, it can stimulate the proliferation and rearrangement of dermal collagen. The skin rejuvenation effect is excellent. It is regarded as the gold standard for laser beauty and skin rejuvenation in Europe, but it will cause serious pigmentation reaction in Asian people, which limits the use of exfoliative laser in people of color. The lattice laser, which combines the advantages of exfoliative laser and non exfoliative laser, is applied. The efficacy of dot matrix laser is close to exfoliative laser, and the side effects are similar to non exfoliative laser. It is deeply loved by beauty lovers.

Dot matrix laser technology is the latest and hottest skin beauty technology in the United States in recent years. It is also the latest skin beauty technology most concerned by the global skin industry. It is a minimally invasive treatment between invasive and non-invasive The theory of lattice laser therapy, known in English as fractional photothermolysis theory, was first published by Dr. Rox Anderson, a laser medical expert at Harvard University in 2004. It was immediately recognized by experts all over the world and quickly applied to clinical therapy. Lattice laser, also known as “image beam laser” and “Pixel laser”, is an image title. Its essence is to divide each pulse laser into nearly 100 micro laser pulses, and each micro laser spot is only 75-100um. When these micro laser beams act on the skin surface, those densely distributed dots look like imaging “pixels”, so the pixel laser is named. The dot matrix laser evenly punches tiny holes on the skin, and then causes a series of skin biochemical reactions to achieve the effect of tightening, rejuvenating and removing color spots. Because the dot matrix laser treatment will only cover part of the skin tissue, the newly punched holes will not overlap each other, and the normal skin between the holes will be retained, which plays the role of a bridge and is conducive to the rapid recovery of the skin. The patient can return to normal life in four to five days. The treatment itself is safer and can treat any part of the body.

There are two emission modes of dot matrix laser. One is that a pattern generator is installed on the laser hand. After passing through the pattern generator, the laser beam is focused into a very thin beam, which is emitted to the skin by scanning. There is a time difference between the emission of different laser beams, so that the skin in the irradiation area has a certain cooling time and reduces thermal damage, At the same time, under the control of microcomputer, the size and shape of the scanned spot are adjustable, which increases the flexibility of clinical application. The other is to install a sieve image generator on the laser hand (dozens of dot matrix microlenses). In the process of laser emission, the laser beam is hard divided into multiple small lasers, which only disperses the energy of the laser beam from the distance, but the heat still acts on the skin at the same time. Another disadvantage is that an image generator determines the spot size and density of a corresponding dot matrix The spot and density of the dot matrix cannot be adjusted flexibly.

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