When the laser pointer light converges at a point
While the absolute power of the laser diodes used in high power laser pointer is not very high (even up to 1400 mW, or 1.4 W), the danger is that the energy is concentrated at one point. As a child, you may have experimented with spotlighting and burning paper towels. As shown in the picture, even if it is just a 200mW laser pointer, let alone a straight-looking eye, even if a light spot is reflected from an object, it will be unbearable for a long time.
High luminosity (ie high power density) is a major feature of lasers and the most important feature of lasers for drilling. Essentially, drilling laser devices convert energy into photons, which are focused into powerful beams that can melt, pulverize and vaporize rock.
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According to the power laser pointer is divided into four categories
Laser pointers are only harmful to the eyes. Although the biggest concern with most visible lasers is retinal damage, most laser pointers are unlikely to cause permanent retinal damage. According to the power, laser pointers are divided into four categories. In France, as in the EU, only the first two categories (power up to 1mW) are authorized for sale to the public. The laser pointer used by the victim in Austria, made in China, belongs to category 2 and was purchased from a large online sales site. The agency noted that while authorized for sale, this power "could cause severe damage to the retina in less than 0.25 seconds." The most likely effects of direct exposure to the laser aiming beam from the pointer are afterimages, glare and glare reflections. Glare is a short-term visual impairment that occurs after being blinded by bright light.
It is always an exaggeration to say that a green laser pointer can start a fire at a distance of more than ten meters, but after a few meters, if it is used improperly, it will be forgotten by inflammable and explosive materials, and it will definitely cause a fire or explosion. The liquid jet and the 3000mw laser pointer act alternately on the workpiece, so the 30000mw laser pointer and the liquid jet are pulsed. The characteristics of the liquid used in the liquid jet are easy to melt and destroy the material being drilled, which contributes to the smoothing of the well wall.
2022-01-25 12:37:45
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