Securite du pointeur laser

In recent years, buy laser pointers have captured the attention of the media and the public. As a consumer product, the laser pointer is designed to be safe for the intended use. Unfortunately, laser pointers are easily misused.

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The first laser pointer was a helium gas (HeNe) laser and produced 633 nanometers (nm) of laser radiation. These pointers are generally designed to produce a laser beam with an output power not exceeding 1 milliwatt (mW). A visible laser (400-700 nm) with a working power of less than 1 mW is a Class 2 laser. Its flicker reflex usually provides adequate eye protection. If a person deliberately overcomes their natural dislike reaction while observing the beam, a level 2 laser can be used for retinal lesions.

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The next generation of laser pen uses a laser diode as a light source. The diode laser pointer initially produces a 690 nm beam. The difference between 633 and 690 nm may seem minimal because both are visible red wavelengths, but the difference is large, as explained by the human eye. The 633 nm seen in the eye are five times brighter than the 690 nm seen. This explains why the first diode laser pointer requires an output of 5 mW to equal the brightness of a 1 mW pointer at 633 nm.

From the point of view of blue laser safety, the situation becomes more complicated as new diode lasers are developed to produce light at 670, 650 and 640 nm. When the wavelength emitted by the laser diode becomes shorter, the power output level remains at 5 mW.

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So today we have a laser beam of 640 m 5 mW, they are very bright. In addition, there is now a brighter indicator on the market with a wavelength of 533 nm (green). This new technology uses frequency doubling: the laser, the infrared component is blocked.

https://www.laserpuissant.com/1000-mw-pointeur-laser-surpuissant.html

The visible range long range laser pointer operating between 1 and 5 mW are classified in category 3a and can be dangerous to observe even in a short period of time. Users should not directly see the Class 3a Laser Pointer Beam, which is described as "hazardous" by US Food and Drug Administration (FDA) regulations. (Class 2 lasers are marked "Attention".) If a person is directly affected by the eyes, the possible dangers are the effects of fear, instant blindness, reflections and afterimages. Numerous incidents of this type have been reported, as well as cases of excessive reactions and instant reactions. The report includes pilots, bus drivers, sports figures, teachers and police officers.

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In 1997, the FDA issued a warning regarding the misuse of laser pointers (see section on consumer information). In some states like California, committing an astronomy laser pointer on a person who thinks he is in danger is a crime. Some local governments have regulations requiring anyone to buy laser pointers aged 18 or older. The expected pending revision will include a special partial comment on the laser pointer.

In summary, laser pointers are useful tools, but they must be used responsibly. Common sense requires the user not to point the laser pointer beam at another person. Lasers greater than 5 mW should not be used as pointers.

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