It is often reported that children play with a "laser pen", which leads to tragedy. How much do you know about the laser pointer?
Laser pointers are all demonstration laser products with laser devices. Laser pointers for children generally use the laser pointer as the sighting device. The laser emits a laser beam through excitation, and its intensity is reflected by the laser radiation power. When the laser radiation power exceeds a certain value, it will cause photochemical damage and thermal damage to the human body.
The macular area of the eye is the most abundant and sensitive area of the human eye, and it bears more than 90% of the visual function. The laser radiation exceeding the limit is almost irreversible. In addition, long-sighted dazzling beams can also affect the human optic nerve and central nervous system, and appear dizziness or even nausea. Children are at the developmental stage, and if the eyes and skin are exposed to laser radiation, the damage will be more serious.
Causes of accidents: production links. The production process of the manufacturer's products is not standardized; the product quality control is not in place; the laser pointer and laser radiation warning marks of the laser pointer and the laser toy are incomplete, and there is no danger warning mark; the nominal category of the product does not match the measured power, and the laser radiation power Far exceeds national standard limits.
Consumers do not understand the knowledge of lasers, especially the harm of lasers to children's vision; some consumers blindly buy laser pens and even give them as gifts to children.
At present, the Chinese national standard GB7247.1-2012 "Safety of laser products Part 1: Equipment classification, requirements" and GB19865-2005 "Safety of electric toys" have some requirements for lasers in laser products, but for laser pens There is no clear requirement for the laser radiation category, which makes it difficult for regulators to regulate related products.