Feb 7 2011
Scientists at the Fraunhofer Institute for Laser Technology have developed a sophisticated laser welding technology to solder transparent plastic parts.
According to the scientists, till date one plastic component has to be transparent to allow the laser to shine through, while the other component absorbs the radiation. This generally meant that soot particles have to be mixed into the plastic.
Fraunhofer scientists analyzed the absorption spectra of numerous transparent polymers to detect the range of wavelengths by which they absorb the laser radiation. Then, the research team designed laser systems that are compatible with those wavelengths. They also developed unique lenses to focus the laser beam for accurate welding.
The scientists are carrying out their research work on the PolyBright project funded by the European Commission to develop the combination of compatible light sources with precise absorption bands.
Project Manager, Alexander Olowinsky reported that a wide range of applications especially in medical technology require a combination of two clear plastics.
Source: http://www.fraunhofer.de