Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1996-02-20
1996-10-29
Pham, Hoa Q.
Optics: measuring and testing
By polarized light examination
With light attenuation
G01B 1124
Patent
active
055701876
ABSTRACT:
A weld-position detector, attached to an automatic welding machine such as a welding robot, having three independently produced indispensable units, i.e., a laser-beam projecting unit for projecting a detection laser-beam, a scanning unit for directing the detection laser-beam towards weld portions of a workpiece and scanning the detection laser-beam across the welded portions, and a light-receiving unit for detecting the detection laser-beam reflected by the workpiece to thereby detect the position of the weld portions. The weld-position detector further having a fixture provided with reference faces on which the three independent units are accurately mounted. The scanning means having a movable reflecting mirror is provided with an optical axis adjusting unit for adjusting the position and the posture of the scanning unit so as to adjust the optical axis of the detection laser-beam until the optical axis of the detection laser-beam, after being reflected from the workpiece, arrives at the light-receiving unit.
REFERENCES:
patent: 4171902 (1979-10-01), Imai et al.
patent: 4758093 (1988-07-01), Stern et al.
patent: 5337148 (1994-08-01), Torii et al.
Hase Takahiro
Nihei Ryo
Sasaki Yasuo
Fanuc Ltd
Pham Hoa Q.
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