The quality assurance of laser pointers is very reliable

The quality assurance of laser pointers is an important step of ensuring the quality of laser pointers .
Laser micro-machining technology, the most successful application is in the latter half of the 20th century, developed in the microelectronics field. Laser micro-machining process as a microelectronic integrated micro-machining technology in one unit, fixed pattern has been formed and put into large-scale production. In addition, to highlight its advantages there are areas of manufacturing precision optical instruments, high-density storage of information written, medical and other biological tissue. Select the appropriate wavelength of the laser, through a variety of optimization techniques and approaching the diffraction limit of the focusing system, high-quality beam, high stability, small focal spot size of the output. Its edge sharp "knife" feature, the marks of high-density micro-lithography, high-density information of direct writing; can also use the optical trap, "force" effect, the tiny transparent spherical material clamping operation. The quality assurance of laser pointers is very reliable.As the impact of particles from the atmosphere, but also has no loss, no interference, low cost, small size, light weight, etc., space satellite optical communication received considerable attention [5]. From the functional space laser communication system is divided into sub-systems and communications acquisition, tracking, pointing (ATP) subsystems. In addition to high-speed communication subsystem, high-power transmission and broadband high-sensitivity receiver, the communication will be a very narrow beam divergence angle of the beam emission (near the diffraction limit, typically a dozen micro-radian magnitude). This is the long-range space laser communication, light and small, high-speed communications capabilities based [6]. Space laser communication system after nearly 20 years of rapid development. System has made many breakthroughs in key technologies. The customer can buy laser pointers at a relatively low price with the member card of laser pointers .
At present, the international community has successfully launched a demonstration of multiple links, but still short of the actual application of T-way distance. On the one hand is its small way, maturity, reliability need to be further improved. The other is the communication rate is still not fully advantage of optical communication technology. Also need to continuously improve to meet the needs of modern information technology. With the development of high-tech, underwater fishing, detection, control and other needs, which gradually formed a special underwater communication applications. As the water of the high frequency of strong absorption of electromagnetic waves, electromagnetic wave attenuation in the water is very serious, almost impossible to spread through the water, resulting in the traditional radio communication applications in underwater invalidity.