Region of Research

 Fundamental studies are performed concerning joining, cutting, surface modification and removal processing with laser beams, aimed at advanced fusion between laser science and production engineering. We focus on clarification of welding or joining mechanisms and intelligent monitoring technology on the basis of the visualization of material processing phenomena with high-speed optical observation or X-ray transmission imaging techniques. Moreover, laser should be utilized with not only high thermal efficiency but also physicochemical effects induced by interaction between light and material. Thus we create innovative processes including laser direct joining of metal and plastic, put these processes to practical use and disseminate achievements of our research to the world.

Current Research Subjects

  1. Development and evaluation of joining and welding processes for the advanced functional materials.
  2. Elucidation of laser welding phenomena and imperfection formation mechanisms, and development of remedies.
  3. Inteligent monitoring and adaptive control in laser welding.
  4. Development of additive manufacturing technologies with blue diode laser.
  5. Creation of new function by surface modifi cation with laser.
  6. Fundamental studies on laser interaction with materials and fundamental studies of materials processing utilizing laser.










Microstructures on TiO2 fi lms with a femtosecond laser materials processing system,
(a) SEM image of a periodic nanostructure oriented to the direction perpendicular to the laser polarization vector (The period of the periodic nanostructure is about 230nm),
(b) Fluorescence microscope images after the cell test on fi lm surface with the periodic nanostructures

Copper cladding using blue diode laser (a)Blue diode laser (b) X ray observation of laser coating with blue laser (c) Cross section image (d) Surface image of pure copper coating layer (e) 3D object of pure copper by Blue diode laser

Clarifi cation of laser welding phenomena
(a) High-speed optical observation, X-ray transmission imaging techniques
(b) 3D Melt flows
(c) Inside view of welding process

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