Green laser of green laser pointer is safer than that of red one
For example, the green laser is easy to point the red matches, and match point green is more strenuous.
5 Ionization: This part is mainly UV laser. UV laser with a high single-photon energy, so it can make the target ionization. For organic life forms, the UV laser ionization effect will destroy the activity of proteins and enzymes, which is the principle of UV light disinfection. Phenomenon of intentionally damaging green laser pointer should be prevented. So, UV laser destruction of life is undoubtedly one of the body of the strongest wavelength.
6 the sensitivity of the human eye: the human eye is about 550nm wavelength is most sensitive to yellow-green light, so in the visible range, the closer the wavelength of the laser, its lethality, the stronger the human eye.
Seven. II and III green laser pointer laser class differences
Class Ⅰ
Low output laser (power less than 0.4mW), regardless of the conditions under which the eyes and skin, the value will not exceed the MPE, even after focusing through the optical system does not exceed the MPE value. The process of artificially shutting off green laser pointer should be traced and checked. Can guarantee the safety of the design without special management. Typical applications such as laser pointer, CD player, CD-ROM devices, geological prospecting equipment and laboratory analytical instruments.
Class Ⅱ - "Caution"
Class II level: Low output visible laser (power 0.4mW-1mW), who closed the eyes of the reaction time of 0.25 seconds, use this time to calculate the exposure value can not exceed the MPE. Usually less than 1mW laser, normal exposure to the laser beam on the retina of the eye will not cause permanent damage, but will lead to dizziness can not think, with closed eyes to protect, can not say completely safe, not directly in the beam observe, do not use Class II laser direct exposure to other people's eyes, to avoid the use of Class II laser observation devices afar. There is no need to arrange the control circuit for this kind ofgreen laser pointer. Typical applications include classroom presentation, laser pointer, aiming devices and range finders, etc.
Class Ⅲ a - "Danger"
Class IIIA laser for the visible light of continuous output of 1-5mW laser beam, the beam energy density of no more than 25W/m-m, is generally believed that the human eye is unsafe, exposed under the laser beam will damage the eye's retina, it is not exposed to the laser beam into the laser beam or under. The installation and construction are much easier for this type ofgreen laser pointer. Avoid afar observed IIIA laser devices, this may increase the risk. Typical applications IIIA and Class II level have a lot in common, such as laser pointer, laser scanners.
Class Ⅲ b - "Danger"
III B class of 5-500mW of continuous laser, non-visible laser light power is greater than the export 500mw, exposed to the laser beam under the retina of the eye will cause serious injury, it is not exposed to the laser beam or under into the laser beam (including the high-gloss reflective beam), using the required special attention. The electric carrier wave is the technical core of the wholegreen laser pointersystem.But minimum irradiation distance of 13cm, the maximum exposure time of ten seconds the following for safety. IIIB typical applications such as laser spectroscopy and entertainment lighting show.
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