The optimization of green laser pointer should be performed as early as possible

Laser sensor is a new measuring instrument, its advantage is to achieve non-contact distance measurement speed, high accuracy, large measuring range, resistance to light, electrical interference and strong. Laser and laser – 1960 laser is the most important emerging scientific and technological achievements. It developed rapidly, has been widely used in national defense, manufacturing, medical and non-electric measurement and so on. Different from ordinary light laser, you need to use lasers. Laser working substance, in the normal state, the majority of atoms in a stable low level E1, at the appropriate frequencies under the influence of external light, in a low-level atoms excited by absorption of a photon energy of the transition to the high energy level E2. Photon energy E = E2-E1 = hv, where h is Planck’s constant, v is the photon frequency. Various types of     laser pointer pen has been exhibited in the product exhibition of   green laser pointer  .

On the contrary, in the frequency v of the light-induced, the atoms in the level of E2 transitions to low-level release of energy and light, known as stimulated emission. The first working laser material so that the majority of the atoms in the abnormally high level (ie, inversion distribution), can make the process of stimulated emission dominant, so that the frequency v of the light-induced enhanced parallel mirrors and through the formation of avalanche generated a strong amplification by stimulated emission of light, referred to as laser. Laser has three important features: high directivity (ie, high directivity, the speed of light divergence angle is small), the laser beam in an extended range of several kilometers, but a few centimeters; high monochromaticity of the laser frequency width of the light 10 times smaller than the average more; high brightness, the use of the laser beam can produce the highest convergence of several million degrees of temperature.
Now often used ruby laser, neodymium green laser pointer, carbon dioxide laser and the gallium arsenide laser light source as a laser range finder. It is based on measuring the Doppler principle object of the vibration velocity. Doppler principle is: if the wave source or receiver of the observer relative to the wave propagation medium and the wave motion, then the observer measured the frequency of the wave source depends not only on the vibration frequency of issue but also on the wave source or the observer’s movement The size of the speed and direction. The measured frequency and the frequency difference between the wave source called the Doppler frequency shift. In the same direction when the vibration direction and Doppler frequency shift fd = v / λ, where v is the vibration velocity, λ is the wavelength. In laser Doppler vibration velocity meter, because the light from reason, fd = 2v / λ. The manager has employed several skilled personnel to build the website of   laser pointer pen .