But actually the invisible laser beam light of green laser pointer

But actually the invisible laser beam light of green laser pointer will be dangerous.
Electron beam due to the magnetic deflection system, there should be no problems like a mirror rotation mechanism in the laser system failure. Electron beam systems require a certain degree of vacuum in the design of the equipment is a hassle, but on the other hand, it will bring some benefits, namely, the vacuum state to quench the workpiece can cause a dust and oxidation, to obtain more bright quenching surface. Electron beam of heat treatment on the metal surface before handling does not require special preparation and coating, laser heating on the surface of black treatment to improve the heating efficiency, which increases the process. Electron gun are no special restrictions on the angle of the beam bombardment of the surface (as long as greater than 3 '~ 4o on the line), while the laser beam is preferably perpendicular to the incident. The light of high power green laser pointer might have some great influence and damage.
For blind hole surface heating, the electron beam with a small magnetic deflection coil manipulation of the beam rotation, manipulation of the beam rotation to be more convenient to use than laser with a water-cooled reflector. Controllability and positioning. The laser is highly controllable performance, can be precisely aimed at the heating station, the controllability of the electron beam, laser poor. Processing orientation is not as easy to implement laser. The operator of the electron beam and laser heat treatment, the need to strengthen labor protection, because the electron beam can cause the x-ray laser leakage, regardless of exposure in the human body or the eye will cause adverse consequences. Introduction and comparison of the above, we can see that the electron beam heat treatment and laser heat treatment will become a competitor in industrial applications, point of view of its future development, the heat treatment of the electron beam surface hardening may have come from behind. Therefore, the protection goggle of green laser pointer can play a very important role. 
Abroad has reached a high level in laser precision punch. A Swiss company to use solid-state lasers to punch aircraft turbine blades can be processed from 20μm to 80μm in diameter porous, and its diameter and depth of up to 1:80. The laser beam can also be shaped hole in brittle materials such as ceramic processing a variety of small, such as blind holes, square holes, etc., which can not be done by ordinary machining. Laser cutting.