Why is the damage of the laser pointer irreversible?
The hazards of laser products are classified as Class 1, Class 1M, Class 2, Class 2M, Class 3R, Class 3B, Class 4 from low to high. Only Class 1 laser products are considered safe under reasonably foreseeable use conditions. Allowed as a children's toy. Consumers are advised to choose qualified products from regular manufacturers according to the use of laser pointers.
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The harm of Laser pointer to human body is caused by photothermal effect, acoustic effect and photochemical effect. Biological tissues will cause a sudden rise in temperature after absorbing laser energy, which is the thermal effect. The degree of thermal damage is determined by the exposure time, laser wavelength, energy density, exposure area, and tissue type. The acoustic effect is produced by the shock wave induced by the laser. When the shock wave propagates in the tissue, it vaporizes the local tissue and eventually causes some irreversible damage to the tissue. The laser also has a photochemical effect, which induces changes in the chemical substances in the cells, thereby causing damage to the tissues.
2021-10-13 11:41:00
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