When the teacher asked the question of laser principle, the teacher praised me to observe carefully, then tell me this is the green laser light speckle interference phenomenon, because of the special high coherence laser. Gauss beam just shows a cross-section of the laser light intensity on the part of Gauss branch, and the scattered Never mind spot.
The particle state was named “green laser light“. The intensity of speckle pattern is random, can be generated by laser in rough surface reflection or laser through inhomogeneous media. Because most of the surface is rough on the wavelength of light, due to the high coherence laser, when light reflected from the surface of the object. Each point on the object to the appropriate distance of observation point vibration is coherent.
Green laser light is due to photons of frequency, phase and amplitude are the same, each encounter can interfere. Due to surface roughness, a beam of photons in the laser will be rough surface reflection to run around, so it encounters the same phase of the photon, the meeting place will brighten, meet the photon anti phase the place is dark.
The “green laser light” I was not very strict, but the expression of “a small light” laser beam inside the light. In the process of communication, the initial phase (shaking position start) is the same, but the instantaneous phase (the current position of the vibration transmission (with) go forward the process of continuous) to 2 pi (a circle) and the cycle of change.
Scanning is to produce light polymerization and curing area of green laser light, forming part of a thin layer. The table down a thick layer of distance, so that the cured resin surface and then deposited on a new layer of liquid resin, the scanning process, the next layer is repeated until the entire prototype manufacturing. Since the light polymerization is based on the interaction of light and not based on the action of heat, so the lower power laser source only at work.
In addition, because there is no thermal diffusion, the chain reaction and can better control, to ensure that green laser light does not occur at the laser point, so the high processing precision, good surface quality, the utilization rate of raw materials is close to 100%, can make complicated shape, fine parts, high efficiency. For the larger size of the parts. It can be used to block forming and bonding method of production.
In the automobile body manufacturing application green laser light can produce precision casting mold with the required proportion, which cast a certain proportion of the body metal model, the metal model can be used in wind tunnel and collision test, thus completing the final evaluation of the body, to determine whether the design is reasonable.
For the green laser light test of intake pipe inlet pipe is composed of the inner shape of free surface is very complex, it is to improve the efficiency of charging, have very important influence on the combustion process. In the design process, need to do airway test of different air inlet pipe of the scheme, the traditional method is to use the method of manual processing by dozens of section describe the wood or plaster mold. The trachea
Using green laser light to make the tiger is must have the effect, because of the specific effects of tiger vary. Let the first thing you say as everyone knows things, animal belonging to the two color instead of a trichromat. In simple terms, the vast majority of animal are color blind. Two color viewer “means the person or animal can only distinguish red and green two colors, blue in; and trichromat can distinguish all the three colors.
Animal behavior science is a theory that says that two of the color of the animal may suddenly see the mobile green laser light is more sensitive, when they suddenly saw a moving object, fear center would be called amygdale brain impulse stimulation to make animal stress reaction, this is when people want to close to the animal should be slowly close.
Of course, this stress response is also different from the animals. Some animals may behave as panic, such as horses, and some animals show confrontation, as we see the cat and green laser light.
So the same way, when you take a green laser light to tease the tiger, as long as it is within the scope of the tiger’s rapid movement, the tiger will respond to stress