Method and apparatus for metal surface process by laser beam
AssigneesThe Local Government of Osaka Prefecture, Osakafuji Kogyo Co., Ltd.
InventorsItsuo Nagata, Hiroki Miyamoto, Kosuke Moriwaki, Ichiro Oshima, Tokihiko Oshima, Shigekazu Hirata, Yoshikazu Okano
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Abstract
The method and apparatus for processing metal surfaces by forming the fine irregularity patterns onto metal surfaces in accordance with both of the strong and weak patterns characterized by the interference light on the metal surfaces under the irradiation of the interference light of laser beam onto the metal surfaces is described.
Claims18
Laser processing method for metal surfaces comprising:
- an illuminating a metal surface of a workpiece by interfering light of a laser beam, producing interference patterns on the illuminated metal surface, and forming fine ridges and furrows corresponding to an intensity distribution of the interference patterns.
Laser processing apparatus for metal surfaces comprising a laser beam light source of multi-mode oscillation, a concentrating means to cause the laser beam to converge, a workpiece placement means to position a metal surface of a workpiece in a domain of light interference deviated far and near from a focal point of the concentration means, and a XY direction displacement means to displace relatively a XY direction illumination position of an interfering light of the laser beam against the metal surface.
Laser processing apparatus for metal surfaces comprising a laser beam light source, a beam splitting means to split a single laser beam from the light source into two or more beams, a concentrating means to cause the split beams to overlap and converge, a workpiece placement means to position a metal surface of a workpiece in a domain of light interference deviated far and near from a focal point of the concentrating means, and a XY direction displacement means to displace relatively a XY direction illumination position of an interfering light of the laser beam against the metal surface.
Laser processing apparatus for metal surfaces comprising a laser resonator, a beam lateral displacement means, placed in a light path of a laser beam from the resonator, to displace a portion of the beam laterally so as to produce an interfering light by the overlapping of the laterally displaced beam component and an original beam component, a beam concentrating means to cause the interfering light to converge so as to illuminate the metal surface of the workpiece with the interference deviated far and near from a focal point of the beam concentrating means, and a illumination position displacement means to relatively displace the illumination position of the interfering light in a XY direction.
Dependencies are inferred from the claim text.