Lasers are classified into four groups depending on the potential biological hazards they cause. When you see a laser, the laser should be labeled with one of the four following labels Class I – this class laser can not emit laser radiation at a known level of harm. Class IA – this is a label for lasers that are not meant to be seen (highlighted to the eye), for example in a supermarket laser scanner. The top power limit for class IA lasers is 4.0 mW. Class II – is a low-power visible laser emitting a beam above grade I laser level but the power it emits is above 1 mW. Class IIIA- is a medium-power laser (about 1 -5 mW), which can be harmful if the beam is viewed face-to-face. Almost all laser pointers are this class. You can try the best laser from billig afstandsmåler.
Class IIIB – is a medium powered laser above IIIA class. Class IV – is a high-power laser (approximately 500 mW, with 10 J / cm2 wave pulses). This laser is dangerous to look at under any circumstances (viewed directly or is the diffusion of the file only). This laser also has the potential to cause serious fire and injury to the skin. Facilities with class IV lasers require tight control. LASER stands for light amplification by Stimulated Emission of Radiation which means the mechanism of a device that emits electromagnetic radiation through a simulated jet process. Such Electromagnetic radiation can be seen by the normal eye, some are invisible.
Here is some advantages Laser when compared with other conventional laser-producing technology is to have a small size, there are certain types of lasers that are less than 1mm with less than 1gram weight. Thus, Laser is suitable for use on small or portable electronic devices. Most Lasers only require the power of several milliwatts with a voltage of around 3 Volts to 12 Volts DC. Therefore, the Laser can operate using Battery resources. Lasers have high coherent output efficiency and ease of modulation for communication and control applications.