Laser range or laser consumption of green laser

Several brightness of the light table light intensity (unit: apostilb? × 102) surface of the moon (through the air after)? × 10-1 candles and oil lamps 5? 0 × 10-1 lamps (inflatable tungsten wire) carbon arc? × 104 surface of the sun (by air) 1? 5 × 105 long arc xenon lamp? 5 × 105 high-pressure pulsed xenon lamp 1? 0 × 106 ruby pulsed laser (pulse width of 1 ns, the beam divergence angle 1 mrad) 3? x 1015 Note: 1? 10-1, or 1/10, 10 -2 1/100, 10 -3 or 1/1000, other analogies: 102 ie, 100, 103 1,000, ... The ..., 1015 after a 15 zeros. ? Ns = 10-9:1 milliradians = 10-3 radians. What is the significance of laser high brightness characteristics? Different  green laser pointer    of different power degrees have different laser energies.
We may have made this experiment: in the hot sun with lens focus, it is easy to match to light, or paper burning a hole means that light can be turned into heat. As long as the convergence of medium-brightness laser beam can produce several thousand to tens of thousands of degrees of heat near the focus, it makes some of the refractory metals and nonmetallic materials rapidly melting as well as gasification. Therefore, the industry has succeeded in using laser precision punching, welding and cutting. For example, it is now widely used ruby laser beam machining watches bearing, nylon spinneret, metal wire drawing dies, etc., the hair so fine holes to play in the above. With a laser beam cutting clothes is even more convenient. Different customers have different requirements towards the parameter and performance of   laser pointer    .
Carbon dioxide laser power of 100 W, put hundreds of pieces of clothes in a thick wad of cloth above, in accordance with predetermined procedures walk around once cut well. (D) clear black and white stripes - the coherence of laser is a coherent light, which is the most important difference of this new laser light and ordinary light. So, what is the coherence of the light? We may wish to water wave to explain: When you to a calm lake into two stones, they are formed by each of a set wave. Two sets of wave to the spread of independent but affect each other, mutual interference, called "wave interference phenomenon. If we carefully observe these two sets of wave interference in each other, they will further discovery. It includes the laser color, laser power, laser energy, laser range or laser consumption of   green laser   .
If the two sets of crest and crest meet, undulating higher; the same, such as troughs and valleys meet, the wave recess becomes deeper. If the crest of a wave with another wave troughs meet, then the waves will cancel each other out. This phenomenon is called wave superposition phenomenon. Wave superposition principle: each wave in the region they arrived, independently stimulate vibration, whether exist other wave; when two waves interfere in the same time a certain point, the point of vibration is equal to the vibration caused by the algebra in each column wave alone. We can produce the interference of two waves are called "interference waves". Issued a coherent wave of wave source called "coherent wave source. It is the laser consumption of   led flash light .
Light is an electromagnetic wave with other waves, optical interference, and also applies the principle of superposition. Should be better than a light wave in the two light waves with each other to strengthen the position, it seems brighter; weaken the position of the two light waves with each other, it seems will be more than just a light wave when dark; when the vibration caused by the two light waves can be just cancel each other out, these positions should look completely black. This light and dark stripes, is "light interference". Is not just a two-beam interference of light encounters can produce light? It is not. The frequency of two light waves are identical, and their direction of vibration between the vibration of pace and always maintain a certain relationship known as the "phase constant" (optical) in order to produce interference. Here is the laser range of green laser pointer .