Abstract: A process is for laser-welding resinous members, and includes the steps of overlapping a transparent resinous member on an absorptive resinous material, and irradiating the transparent resinous member with a laser beam, thereby welding an interface between the transparent resinous member and the absorptive resinous member as a strip shape, wherein the energy of the laser beam acting on a side of a major-curvature-radius curved part of the strip-shaped welded interface and the energy of the laser beam acting on a side of a minor-curvature-radius curved part thereof are averaged.

Abstract: A process is for laser-welding resinous members, and includes the steps of overlapping a transparent resinous member on an absorptive resinous material, and irradiating the transparent resinous member with a laser beam, thereby welding an interface between the transparent resinous member and the absorptive resinous member as a strip shape, wherein the energy of the laser beam acting on a side of a major-curvature-radius curved part of the strip-shaped welded interface and the energy of the laser beam acting on a side of a minor-curvature-radius curved part thereof are averaged.

Abstract: An image pickup camera is mounted on a soldering head for projecting a laser beam in such a manner that its optical axis coincides with that of the laser beam. An image of the object to be soldered, which is taken by the camera, is displayed on a monitor screen, and a projection spot, which is positioned on an optical axis of the laser beam, is displayed on the screen. While the positional relationship between the object to be soldered and the projection spot is observed on the monitor screen, the soldering head and the object to be soldered are moved relative to each other and the projection spot is positioned. Subsequently, the laser beam is projected from the soldering head, thus, performing soldering.

Abstract: An image pickup camera is mounted on a soldering head for projecting a laser beam in such a manner that its optical axis coincides with that of the laser beam. An image of the object to be soldered, which is taken by the camera, is displayed on a monitor screen, and a projection spot, which is positioned on an optical axis of the laser beam, is displayed on the screen. While the positional relationship between the object to be soldered and the projection spot is observed on the monitor screen, the soldering head and the object to be soldered are moved relative to each other and the projection spot is positioned. Subsequently, the laser beam is projected from the soldering head, thus, performing soldering.