Lasers currently used mostly YAG laser, CO2 laser-based

Lasers currently used mostly YAG laser, CO2 laser-based.
Laser coating: in aerospace, mold and electrical industries widely. Currently used lasers to high power multi-YAG laser, CO2 laser-based.
Based on laser applications in dentistry different roles, is divided into several different laser systems. Distinction is an important feature of the laser: the wavelength of light, different wavelengths of laser on the role of different organizations in the visible and near infrared spectral range of light absorption is low, penetrating and strong, can penetrate into the tooth structure more deep parts, such as argon ion laser, diode laser or a Nd: YAG laser (Figure 1). Laser Pointer  has developed into a pint-sized high-tech product. The Er: YAG laser and the CO, laser light penetration is poor, can only penetrate the tooth structure about 0.01 mm. Difference between the two lasers is an important feature: the laser intensity (ie, power), as applied in the diagnostics of laser diode, the intensity of only a few milliwatts, which is sometimes used in the laser display.
For the treatment of the laser, usually a few watts of moderate-intensity laser. Laser organizations, and also depends on the laser pulse emission mode, the typical way a continuous pulse laser emission are: argon ion laser, diode laser, CO2, laser; to launch short-pulse laser are: Er: YAG laser or many of the Nd: YAG laser, short pulse laser intensity (ie, power) can be up to 1,000 watts or more, these high strength, high absorption of laser light is also only applies to clear the hard tissue.the use of laser in the beauty industry more widely. Laser Pointer  is not only an instrument for pointing but also extending continuously. Laser is to produce high energy, focus precisely, a certain penetration of monochromatic light, the role of human tissues and locally produced high heat to achieve the removal or destruction of the target organization's purpose, laser pulses of different wavelengths to treat the types of vascular and pigmented skin, such as nevus of Ota, port wine stains, freckles, age spots, telangiectasia, as well as to tattoo, eye line, eyebrow, scar treatment, etc.
Ordinary light is light in all directions. Let the light emitted towards one direction, you need to light a certain condenser fitted with devices such as car headlights, and searchlights were installed on the role of the condenser mirror, so that radiation is to bring together in one direction injection. Laser emission of the laser, born in one direction injection, beam divergence is extremely small, only about 0.001 radians, nearly parallel. Some enterprises have purchased page-turning  Laser Pointer .In 1962, the first human use of laser irradiation the moon, the moon's distance from the Earth about 38 million km, but the laser spot at the lunar surface less than two kilometers. If condenser works well, seemingly parallel light beam searchlight shooting the moon, according to its spot diameter will cover the entire moon.