Does the damage of laser pointer to eyes appear immediately or later?

The laser pen uses a He-Ne gas laser with a wavelength of 633 nm, so the damage of the laser pen to the eyes will appear immediately.

Improper use of laser pointer may cause serious damage to retina and macula, or even permanent blindness, which is not suitable for children. If you operate high-power laser, you should wear special safety glasses, especially contact laser. Also, no matter how powerful the laser is, we should avoid hitting ourselves and others' eyes, and the laser itself should be labeled with warning labels.

Many laser pens and flashlights sold in the market belong to Class IIIB, with power exceeding 5mW. If the laser directly enters the eyes, it may cause harm to the eyes. Some high-power laser pens, the diffused light may also cause harm to the eyes, and it is easier to ignite flammable materials after focusing. Therefore, the laser pointer is not a toy and is not suitable for children.

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Precautions for using laser pointer:

In addition to safety, you must also be careful when using a laser pointer. In the art gallery, because some paintings may be afraid of light, it is not suitable to use a laser pointer. In the zoo, in order to avoid scaring animals, laser pens should not be used either.

Astronomical enthusiasts should pay attention when pointing at the starry sky with a laser pointer. It is not advisable to use the pointer frequently and for a long time, so as not to hinder others from watching the stars and taking pictures. In crowded public places, in order to avoid accidentally injuring others, you should stop using laser pens. Some high-power laser pens have obvious thermal effects and cannot be used continuously for a long time, especially for temperature-sensitive solid-state lasers.

Although the laser pointer is powerful, it can do a lot of impossible work. In the market, it has won unanimous praise from consumers. But you should also pay attention to safety when using it. The laser pen uses a blue-purple laser diode with a wavelength of 405nm, which belongs to a semiconductor laser and is close to the ultraviolet band. The visibility is low, but it can stimulate fluorescence and has the functions of banknote inspection and chemical inspection.

Baidu encyclopedia-laser pen

Henan daily newspaper group-dahe. Com-15-year-old boy burned his left eye while playing with a laser pointer.