Is the real laser pointer safe?
The Spring Festival is approaching, when many parents buy various toys for their children, many people choose to consume Laser pointer and laser guns. Yesterday, the Wuhan Municipal Quality Supervision Bureau issued a safety warning not to buy such children’s toys, because 70% of the laser pointers and laser guns on the market are three products, and more than 3% of the products whose performance exceeds the standard may affect the skin and eyes. . According to reports, a 10-year-old boy in Wuhan curiously watched students playing with a laser pointer. He had red eyes when he just walked over. After a few seconds, the boy was stunned, feeling that his right eye was covered with a large circular black spot and he could not see anything. Later, I went to the hospital for an examination, and the results showed that the visual acuity of the 1.2 or so eyes was only 0.2, and there was a circular scar burning at the lower right macula.
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The beam output power of this type of laser exceeds 500 mW, which may cause serious and permanent damage to the eyes or skin without being amplified by the eyes or the optics of the instrument. These are cutting, etching and surgical lasers. The diffuse reflection of the laser beam may cause harm to the skin or eyes in the nominal hazardous area. The laser power mentioned above is a rough indication; the classification also depends on the wavelength and whether the laser is pulsed or continuous. Moreover, even if the high-power laser is enclosed, it can be assigned to a low safety level, so that no laser radiation can leave the housing and harm people.
2021-10-13 11:47:14
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