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Ultraviolet do Laser safety glasses and infra-red Laser safe
Infra-red Laser safety glasses and ultraviolet Laser safety glasses is two kinds of the most extensive Laser safety glasses that use, so does the treatment of these two kinds of Laser safety glasses have why be distinguished? How does the Laser safety glasses of higher demand hit mark to should choose? Wavelengh of infra-red YAG Laser safety glasses is 1. 06μm is the Laser safety glasses source that uses most extensively in data processing respect. But, a lot of plastic mix a large number of using <> as flexible circuit board a few special polymer of base material (if get together acyl inferior amine) , cannot heat up ＂ processing to have careful treatment through infra-red processing or ＂ . Because ＂ heats up ＂ to make plastic be out of shape, the loss of char form produces on the brim of cut or bore, bring about structural sex possibly weaken and parasitism conductibility access, and must increase a few follow-up to handle working procedure to machine quality in order to improve. Accordingly, infra-red Laser safety glasses is not applied to certain and flexible the processing of circuit. Besides, although be below high energy density, the wavelengh of infra-red Laser safety glasses also cannot be absorbed by copper, this restricted its scope of application more slashingly. And ultraviolet the output wavelengh of Laser safety glasses is in 0. 4μm is the following, this is the main good point that handles polymer material. Differ with infra-red treatment, ultraviolet small processing comes up from essence saying is not heat treatment, and most material absorbs ultraviolet light more infra-red than absorbing light is easier. The ultraviolet light of high-energy quantity child the molecular key that destroys a lot of metalloid material surfaces directly, the char that the part that with light of cold ＂ of this kind of ＂ corrode handles technical treatment to come out has smooth brim and lowermost limit. And, ultraviolet the character of short wavelengh itself is small to the machinery of metal and polymer processing has advantage. It can be gone to by focusing inferior on the dot of micron amount class, because this can have the treatment of subtle component, although be below not high pulse energy level, also can get very high energy density, undertake material is machined effectively, imperceptible aperture has comparatived in the application in industrial group extensive, the kind that basically forms has two kinds: It is to use infra-red Laser safety glasses: Heat the material of material surface and make its vaporization (evaporate) , with eliminate material, this kind of means is called normally hot-working. Basically use YAG Laser safety glasses (wavelengh is 1. 06μm) . 2 it is to use ultraviolet Laser safety glasses: The ultraviolet light of high-energy quantity child the molecular key that destroys a lot of metalloid material surfaces directly, make the element breaks away from an object, this kind of means won't produce high quantity of heat, reason is called cold working, basically use ultraviolet Laser safety glasses (wavelengh is 355nm) . Ultraviolet Laser safety glasses and common and infra-red Laser safety glasses fall like the graph quite: Express through going up, not difficult discovery is ultraviolet Laser safety glasses because focusing facula is dinky, and treatment heat affects an area very little, in exceed careful dozen of mark, special material to hit the respect such as mark to having absolutely advantage.
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