The size of the laser dot aperture
In general, the laser beam is circular and has a Gaussian distribution. Dot matrix is not a laser dot, but refers to a working mode of the laser. As long as the laser beam (spot) diameter is less than 500μm, the Laser pointer beam is arranged according to the lattice law, and the laser works in the lattice laser mode. Using beam shaping technology, gaussian distribution can be transformed into uniform distribution (Top Hat), and the output beam shape can be square, rectangular, etc. The uniform parameters for beam size are simple (see figure below). Simultaneous measurement of gaussian beam diameter is more subjective and depends greatly on the method used. Some of the different criteria for reporting gaussian beam size include D4σ, 10/90 or 20/80 edge, 1/ E2, half width, and D86. Of these, 1/2 E2 and FWHM(half height full width) are the most commonly used. It is important to understand the laser beam profile and beam size because, by definition, the same laser dot will have different beam sizes.
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Laser point is just a mode of laser emission. The lattice laser is equipped with a special image generator (CPG). The image generator changes the mode of light emission. The lattice laser can be fired through a high-focus lens of ** 50μm-80μm, and can scan up to 6 rectangular patterns (round, square, rectangular, diamond, triangle, linear), suitable for different parts and different skin types. Fractional laser is also called "space shuttle laser". Every laser it emits is a brand new laser. The laser beams are so small and fast that it feels like they're being fired at the skin at the same time. Yes, the laser spot is designed so that the heat of the laser beam reaches the skin in stages, giving the skin a buffer period to absorb the heat, which is better at reducing pain and side effects. The difference between the component laser and the dot array laser is that the pixel laser is equipped with a screen image generator at the front of the emitter. The laser beam is rigidly divided into a number of small laser points in the laser emission process. The energy is dispersed from a distance, but the heat is still acted on the skin at the same time.
2021-09-18 06:13:57
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