PPT can be displayed through using green laser pointer

Multi-line deflection while multiple scans: This method simultaneously with multi-line deflection scanning of the same class, but from a character of some areas on the formation of a complete character is divided into multiple scan completed. Graphical information matrix lattice formation and the formation of similar character. Laser printer drum is the core component. It is a photosensitive device, the main light guide material. Its basic principle is the "photoelectric conversion" process. It is consumed in the laser printer as the material used, and its price is relatively expensive. Do not. That is high in the scan dot matrix characters. The power of torch-like green laser pointereven reaches a laboratory grade.
Photosensitive semiconductor semiconductor commonality, such as heat excitation, changes in conductivity after doping. In addition, it also has other semiconductors do not have the "light conductive" properties. Photosensitive semiconductor by light irradiation, its conductivity can be increased by several orders of magnitude. From the band perspective, it's price band in the electronic absorption of light energy, the leap into the conduction band, creating electron - hole pairs. This light generated by the electron - hole pairs, known as "photo-carrier." Photosensitive semiconductor generated within the "light-carrier" increase, its conductivity will increase. After irradiation by the light of this improved conductivity is called "intrinsic optical conductivity." Practical applications, photosensitive doped semiconductor material and subject to the use of lasers made of semiconductor materials. green laser pointer with remote control can also be sent as the gift.
So in addition to the intrinsic optical conductivity, but also must have a light impurity levels excited electrons or holes formed on the optical conductivity of the nature of impurities. In some photosensitive semiconductors, "the optical conductivity impurities" play a major role. Photosensitive semiconductor by light irradiation, the object will be different degrees of change within the "carrier mobility" (carrier mobility is the migration rate and the ratio of the external electric field). Mark objects conductivity "conductance", equal to the carrier density multiplied by the migration rate. Migration rate, increased conductivity, electrical conductivity by the intrinsic optical conductivity, optical conductivity and impurity mobility values joint decision, but under certain conditions, some of which will be the main factors to nothing. Practical application of various light conductors are not the same degree of sensitivity to light. Light conductor and its conductivity is proportional to the sensitivity of the light. So light perception to light a great influence on the conductivity of the conductor. Users will completely free from staying at the side of the computers by using green laser pointer with remote control.
Photoconductor to light the light sensitivity is not the same. A certain kind of light conductor, only the light spectrum of a region with high sense of light, leaving the region, the possible loss of light sensitivity. Photosensitive semiconductor and its application in optical wavelength range, will form a light absorption peak. Within the scope of this peak in photoconductivity best. It also has a relationship with the illumination of light. The higher the illumination, the resulting carrier, the more light the higher the conductivity. However, different characteristics of each optical conductor, so under the same conditions, to achieve the same conductivity indicator light illumination required is different. Now commonly used photoconductive drum material cadmium sulfide (CdS), selenium - arsenic (Se-As). Organic photoconductive materials (opc) and other types. Drum used in the production of light guide material, should have the following characteristics. The torch-like green laser pointer is unlike the ordinary green laser pointer in the shape.
Good wear resistance. Photoconductor surface to have a certain hardness to withstand the process of developing transfer and cleaning of mechanical wear. If the drum (photoconductor) is worn or scratched, will lead to a decline in print quality or damage the drum, when the only scrap of serious wear and tear. In the actual work, because of wear and tear, scratches and drum up scrapped. Now a new type of long-life ceramic drum (a-Si) has been applied to print 300,000 more. Good temperature stability. Photoconductor performance easily affected by temperature, so in the performance of laser printers have a special emphasis on the appropriate use of environmental temperature and humidity, otherwise it will affect the print quality. You should put torch-like green laser pointer of high power out of the reach of children.