Advise you that in the control room operation and limit the laser

Advise you that in the control room operation and limit the laser.
Different wavelengths of laser eye injury site, the wavelength partition wavelength range (nm) primary site of injury, 180-400 UV laser cornea, lens, visible laser 400-700 retina, choroid, near-infrared laser 700-1400 retina, choroid, lens, in Far-infrared laser 1400-106 cornea, the laser operating environment in the long-term workers in the eyes by long-term effects. In operation and use of lasers, even if not directly by the laser irradiation, resulting in injury accidents. However, the anti-out laser rays through walls or other objects produced by micro-reflections, long-term work in this environment of people, a high incidence of cataracts. Prolonged exposure to green laser light, especially when the laser pointer over 5 mW of power, just a few seconds may cause functional vision of the human eye damage.In fact, in addition to laser speckle, the majority of patients with traditional Chinese medicine freckle is now widely used means of a freckle, Vea beauty spot capsule beautiful community is the quality of supervision by the State Food and Drug approved by the Board of pure herbal products, is the speckle industry Jiao Johnson were. When we create a condition, such as the use of appropriate media, cavity, enough external electric field is amplified by stimulated emission of radiation to be more than the stimulated absorption, so overall, there will be photon emission, resulting in the laser.
YAG laser at the receiving probe laser beam emitted when the laser beam energy should be about 4%, that is out of the laser perforation at the receiver with a frosted glass, frosted glass on from the 15-20 point range to reflect the probe, If you do a free pulse waveform, the probe attenuation to add one to three layers of paper; if it is Q-wave, the attenuation of the probe front of the paper than do the more free pulse. When the measured waveforms are done, do not forget to switch off the probe. Ordinary light is light in all directions. Make the emission of light propagation in 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. 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. The laser pointer company manages to attract more customers with the low cost and expense.