In the use of laser protective glasses wecan understand to the specification of safety goggles is the key, aftersecurity specification, in use can avoid the influence of laser, follow thedevelopment of laser work, we understand that to understand the laserprotective eyewear is true can be useful to assist the treatment of laser indoubt, is conducive to the eyes door.
The laser has the characteristics ofstrong directivity, good color and good coherence, which makes it widely usedin military, industrial and medical fields. But precisely these characteristicsof the laser on the human body also constitutes a great threat. The eyes arethe most sensitive to human organs due to the focusing effect of laser, eyelight can make the retina energy density increased 105 times, so the low dosecan cause severe damage on the retina resulting in reduced vision and evenblindness. With laser technology in military and civil areas are widely used,laser protection skills more and more attention by us, how to become useful forlaser protection, we attach great importance to the question that countriesaccordingly developed laser protection standard. As early as in 1962, theUnited States put forward some laser safety radiation limit.
From the protection point of view, now thelaser protection materials can be divided into three categories:
One is based on the principle of linearoptical laser protection, it contains absorption, reflection and absorption andreflection of composite type;
The two is based on the principle of laserprotection of nonlinear optics, it mainly uses the three order nonlinearoptical effects, including nonlinear absorption, nonlinear refraction, nonlinearscattering and nonlinear reflection; the three is based on the principle oflaser protection transformation.
Now China's use of the mandatory norms oflaser safety:
CJB-2408-95 laser protective glassesprotective function test method GJB-1762-93 laser protective glassesphysiological health protection request 5524-91 JB/T laboratory laser safetyrules.
There are many types of laser protectivemirror, the information is not the same, the principle of different, the use ofoccasions are not the same. Therefore, to provide for the laser usefulprotection must be in accordance with the request of a detailed application ofthe laser protective mirror for a reasonable choice. Choose the door mirror,the maximum laser output power of the primary basis (or energy), beam diameter,laser pulse time parameters determine the maximum output irradiance or maximumexposure. Then, according to the maximum amount of the corresponding wavelengthand light irradiation to time (eye shine limit) concluded that glasses theminimum optical density value, and then select the appropriate protectiveglasses.
Details of the selection of the mainselection:
1, the maximum amount of radiation Hmax(J/m2) Emax (W/m2) or the maximum irradiance;
2, specific protection wavelength;
3,the optical density value of Dmin to the corresponding protective wavelength;
4, the non - uniformity of the protectivelens, non - symmetry, the incident light point of view effect, etc.;
5, anti laser radiation ability;
6, visible light transmittance;
7, structure and shape.
The above is small as the laser protectiveglasses information we supply, small to the common sense of expectation caneffectively help to you, pay attention to selection of laser protectiveglasses, laser protective glasses can effectively ensure the treatment effectof laser in doubt.
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