the laser pointer wireless presenter

Brillouin scattering 2.1.2 with a laser fixed atoms, and constantly other atoms, gaseous atoms, molecules in a never-ending movement (speed of nearly 340 m / s) of molecular collisions, to "capture" operation is not easy. Chinese scientists in 1997, Stanford University, Chu et al. And then turn the page down or up as needed through using the  laser pointer  wireless presenter in almost every corner of the classroom. This characteristic of  laser pointer  makes this kind of green laser pointer a favorite
Laser beam for the first time the number of atoms cooled to extremely low temperatures, so that the speed is lower than when the thermal motion is usually done to achieve the purpose of "capture" operation. In practice, the three mutually perpendicular directions fired at the same point six two two pairs of orthogonal laser beam, the beam will always atomic push, so about 106 atoms to form a cell, the temperature at 240? of κ [3] [2] and so on. Below. This makes the atoms speed reduced to 10 m / s, two. And later made light of the anti-gravity - magnetic trap, the atoms fall from the control area in about 1s after capture. This technology, spectroscopy, atomic clocks, studies of quantum effects has broad application prospects. It will be the situation for the lecturer, reporter or business men when they carry out their lecturing, reporting or presentation in the meeting room, concert hall or trade meeting by using laser pointer .
Laser ranging of 2.2 Laser Ranging, LIDAR laser high brightness and excellent direction, made of laser range finder, laser radar and laser collimator. The principle of laser ranging and similar to the acoustic ranging principle. Laser radar and laser ranging works, but the laser radar alignment is the goal of moving targets or relative motion. Using laser radar and the development of long-range missile tracking and laser-guided technology, these have been put into use in the Gulf War in 1991. Laser-guided missiles, the head of four arranged in cruciform laser receiver (four-quadrant detector). Four laser receiver receives the same, according to the original direction of flight. And at the same time, the laser pointer wireless presenter also has the basic function of the ordinary laser pointer .