To provide a light source for processing which can make the condensing area of a laser with a large M value, particularly a DDL (direct semiconductor laser) small or make the condensing shape of the laser symmetrical, without shortening a WD (work distance) in the light source for processing.
A laser beam is output from a direct semiconductor laser which oscillates at the wavelengths of 790nm to 810nm where aluminum which is hard to process can be processed. The laser beam is made to pass through a lens which varies the divergent angle of the laser beam, and is radiated and transmitted into a waveguide composed of mirrors of which the outgoing radiation end faces are smaller in area than the incoming radiation end faces. This simple and inexpensive radiating and transmitting means can provide an optional beam shape, whereby the processing of aluminum which is hard to process can be made advantageous.
MINAMIDA KATSUHIRO
KIDO MOTOI
Tsugeko Shigeo
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