I believe that many people know the laser pointer, and they have heard that the light from the laser pen is harmful. So, do you know how much the laser pen is? What are the specific hazards? Let me introduce you in detail below!
      It is necessary to ask how much the laser pen has a price. The price of different colors is also different. There are a few dollars for cheap, and several thousand for expensive. The following are the hazards of laser pointers:
First, the harm of "laser pen"
      Due to the strong focusing of the laser, the laser pen can produce a heating effect, which satisfies the psychology of the young adults, and has been widely welcomed by primary and secondary school students. Normally used laser pointers are generally divided into four grades, less than two grades (0.4 to 1 milliwatts), as long as the exposure time is not long, it will not cause damage to the human eye and skin; but the laser pointer of 3-5 milliwatts or more The power is large and can cause damage to the human body. At present, due to lack of supervision, the laser pens sold around the campus have powers of up to 100 to 300 mW, which can instantly ignite matches, firecrackers and paper, and even cause fires. Plus primary and secondary school students lack the necessary self-protection awareness. When playing, a long time of exposure can cause damage to the retina and skin surface of the eye, leading to permanent damage and even blindness.
Second, typical cases of surrounding provinces and cities
1. In February of this year, a 15-year-old student in Hebi, Henan Province tried to use a laser pen to test a long-range break of a balloon, burn holes in paper and sister's sneakers. As a result, the laser beam was irradiated. Eyes, causing permanent damage to vision.
2. In March of this year, a 10-year-old elementary school student from Nanchang, Jiangxi Province bought a high-power laser pen in the store around the school. After that, he used the right eye to get close to the pen and burned the macula. It was difficult to see the right eye due to missed treatment timing. restore.
Third, the status quo of "laser pens" for students in sale
1. The quality is not up to standard. At present, most of the laser pens sold around the campus come from Guangdong. In order to obtain huge profits, merchants pretend to be pure imported laser pens. These laser pens only have English logos on the outer packaging, and there is no Chinese warning, which brings security risks.
2, the pursuit of high power. Because primary and secondary school students are more reluctant, students often have farther than those who have the "laser pen", who can ignite matches and paper in a shorter time. In order to meet the demand, the merchants purchase high-power "laser pen" sales, which poses a great threat to student safety.
3. Mobile peddling is outstanding. Due to the lack of daily supervision, temporary traders who set up stalls around the school, in order to attract primary and secondary school students, often use low-quality, high-quality, unbranded laser pointers for papers when primary and secondary school students go to school and leave school. The ignition demonstration of matches is very easy to induce fire.
4. Internet sales are rampant. At present, there is only 30,000 "laser pens" in the Taobao website, and nearly 2,000 pieces of "high-power" laser pens are clearly marked. Some sellers sell more than 200 pieces per day, due to the network. The lack of supervision, many primary and secondary school students can gently buy high-power "laser pens" from the Internet.
      Through the above content, do you already know how much the laser pen is? I hope the above content is helpful to everyone!
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