The teacher gives led flash light back to the student

Electro-optical efficiency of the laser diode is greater than 30%, compared to CO2 and Nd: YAG laser, the efficiency of their respective values were 10% and 4%. Currently available high-power diode laser output power greater than 6KW, this strength is sufficient to meet the cladding, welding, heat treatment and metal surfaces. However, in the automobile industry, the initial application of laser welding in connection polymers. Although thermoplastics easily absorbed far infrared radiation, but generated by near-infrared diode laser light is opaque. Most of the energy is not absorbed by the polymer. However, you can have a choice of adding additives such as pigments, fillers, enhancer, etc. to make the plastic absorbs the laser energy. Some students want to buy green laser pointer .
Transmission welding of polymers and additives used in different absorption and transmission characteristics, using a form with some overlap to achieve welding. By careful selection of materials and additives, making contacts in the upper part and lower part can be transmitted laser was designed to absorb enough laser energy, which makes the interface melting, welding in order to achieve the purpose. In this application, the carbon is an ideal additive because it is easy to absorb the energy of the laser diode. Laser transmission welding of plastics welding technology with the existing number of advantages compared to. And the vibration / ultrasonic welding of different, non-contact laser transmission welding process, so are less likely to sensitive components, such as with electronic circuit components, causing damage. In addition, it almost does not require any special tools, and most of the vibration / ultrasonic, hot plate welding system requires many specialized tools for processing of components. The teacher gives led flash light back to the student.
In the laser processing of the key factors include: selection adding polymer additives (ie, pigments, reinforcing agent, processing aids), joint design, processing path design. UK Warwick Laser Systems, Inc. (Coventry City) has developed a laser transmission welding of plastic devices and achieve commercialization. The applicability of a thermoplastic assessment has identified a number of materials, welding conditions, the color of these materials include materials, polypropylene, polyethylene, acrylic resin, polycarbonate, glass fillers and thin film materials. As a non-contact technique, laser welding and other traditional techniques to avoid the related tools and product placement pollution problems. From the diode laser beam injection system is highly controllable, and the output is stable and can be pre-set, and allows continuous welding. High laser power, beam width, it can be a large area of the weld, in fact, the size and structure for the components without any restrictions. If necessary, the height of the beam control and beam transport accuracy is very precise to ensure the welding operation.  green laser pointer can be very useful in the class.
In food packaging, medical equipment, and scientific equipment have been put to good use in the field of laser transmission welding technology, and the automotive industry is still the most important uses of this technology area. Recently, the British Birkby's Plastics, Inc. (West Yorkshire, Oliver Milicic) the use of laser transmission welding technology to create a new electronically controlled throttle (ETC) pedal for motor vehicles. Pedal as shown in Figure 1, it is made of glass-filled nylon mold, is widely used in the automotive industry.