Characteristics of laser
Compared with the general light, laser light has four characteristics:
(1) high brightness
Since the launch capabilities of Laser Pointer intensity and highly concentrated energy, high brightness so that hundreds of millions of times higher than ordinary light, a few hundred billion times brighter than the sun's surface. Brightness is a measure of an important indicator of the quality of the light source, if moderate-intensity laser beam passes converge, it can generate heat in the focus of a few thousand to tens of thousands of degrees.
(2) The direction is good
After the divergence angle of the laser emission is very small, the laser emits 20 km, the spot diameter is only 20 - 30 cm, the High Powered Laser Pointerhitting the 380,000 kilometers of the moon, its beam diameter is less than 2 km.
(3) color is good
The color of light is determined by the different wavelengths of light, different colors, different wavelengths of light effects in different human vision and reflected. Basically the same wavelength of the laser, spectral width is very narrow, very pure color, color is very good. Because of this feature, the laser communication technologies in a very wide application.
(4) coherence is good
Wave coherence is common to all, but because of the quality of a variety of different light waves, causing them to have the level of coherence of the points. Just ordinary spontaneous emission of light, does not produce interference. Unlike ordinary laser light source, it is stimulated emission of light, with strong coherence, so called coherent light
. At such a high optical power density of irradiation can be achieved almost green laser pointers cutting and drilling of any material. Laser cutting technology is an out of the traditional mechanical cutting, heat treatment and cutting like new cutting method, a higher cutting accuracy, lower roughness and more flexible method of cutting and higher productivity and so on. Laser drilling method is one hole on a solid material processing methods, it has become a have particular application processing technology, mainly used in aviation, aerospace and microelectronics industries.