Light, is the most common element in ourdays, for us, the use of light in the day, the light in many aspects of theperformance of the day is beyond doubt. And we must use in life are notunfamiliar activities in a variety of laser laser equipment diversificationapplication, we must understand it is because of the development of our laserusing day that day society becomes more and more characteristic. In our view oflaser protective glasses nowadays most people are lack of real application oflaser using laser know understanding, is indeed a day in the first use ofelements, but we understand the expectations of laser protective glasses bylaser damage but also together more than other substances.
By many theories, the use of laser powerdensity (or energy density), the greater the damage, the greater the skindamage, the two were positively related to the proportion of the skin. Thelaser energy absorbed beyond the safety threshold, exposed parts of the skinwill appear with increasing dose and sequentially heat induced erythema,blisters, condensation and heat caused by carbonization, boiling, calm and heatcaused by vaporization. Therefore, the mechanism of laser damage to the skin ismainly caused by the thermal effect of laser. Skin absorption of laser energyin the future, some of the skin temperature increase in the short term, thelevel of increase in temperature is not the same, the damage is not the same.Especially the infrared laser is good, such as CO2 laser (vapour laser), theskin absorption rate is very high for the 10.6 m wavelength infrared laser,transmission rate is very low, the skin of CO2 laser intense absorption, makesome skin temperature increased rapidly, very easy to damage. The severe levelof laser damage to the skin is determined by the laser absorption rate of theskin, and the absorption rate of the skin by the laser wavelength is determinedby the laser wavelength. The higher the absorption rate of the skin to a laser,the more severe the damage. If the skin to UV laser and infrared laserabsorption rate is very high, these two types of laser is the main laser damageto the skin.
Infrared laser is thermal burns on theskin first effect, this kind of laser power is small due to the skin, bloodcapillary dilate, skin redness fever. With the increase of laser power density,the thermal damage level also increases. On the contrary, the effect of UVlaser on the skin is mainly the light effect. In the ultraviolet laserirradiation of the skin can cause skin erythema, aging, severe carcinogenicchange. The maximum damage to the skin of UV light wave at 270 ~ 290nm, thewavelength ratio of 270 ~ 290nm large or small of their damage levels arerelatively reduced. (wavelength in the YAG 1.064um infrared laser damage to theskin is smaller), we should be in the use of laser light together with a clearlaser to bring us comfort and targeted. The laser is an indispensable part ofour day, but it is also an element of the great damage that we have in ourdays. Expect us to pay attention to the laser, pay attention to the use oflaser material information, more important is the laser's special and targeted,as long as the understanding of the laser to avoid the problem when we use thelaser.
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