Application No./Patent No.: 2019209548537 Application date: June 24th, 2019.
Inventor/Designer: Feng Aixin, Tang Jie, Shang Dazhi, Zhou Yuanhang, Wang Kui, Wang Shuxin, Wang Jingxu and Han Lei.
The utility model relates to a laser welding device for metal nano-elements, which is sequentially arranged along an optical path: a laser generator for generating monochromatic laser beams; The beam expander amplifies and collimates the monochromatic laser beam generated by the laser generator; A shutter for controlling the passing time of laser light; Attenuator to adjust the laser power; 1/4 slide, change the polarization direction of laser beam, and convert the linear polarization of laser beam into circular polarization; A shutter for filtering stray light of the laser beam; Scanning galvanometer for positioning and scanning; A focusing mirror for focusing the laser beam to form a focused light spot; And the three-dimensional motion platform is used for bearing the metal nano-element to be welded and adjusting the welding position, and the focused light spot directly irradiates the surface of the metal nano-element to be welded. In the non-contact welding, the welding spot is only locally heated within tens of nanometers, the laser spot is focused to the micron level, and the diameter of the focused spot is controlled below 120mm, thus realizing the metal nano-scale welding.
