Light pattern projector especially for welding

Details Light pattern projector especially for welding Light pattern projector especially for welding

1982-12-20

1985-01-01

Shaw, Clifford C.

Electric heating

Metal heating

By arc

318577, 350 9624, 901 9, 901 42, B23K 912

Patent

active

044917198

ABSTRACT:
Structured light patterns are introduced into the arc vicinity within the field of view of the integral optical sensor on a gas tungsten arc welding torch. Processing the image yields data needed to guide the torch and control and assess the weld process. The optical welding torch has a projector system with a remote light source and flexible fiber optic bundle over which the light pattern passes to an exit projection and relay assembly mounted on the torch. A programmable laser pattern projector, useful for other applications, has a beam deflection device that traces a two-dimensional pattern on the entrance of a coherent fiber optic bundle; no moving parts or electrical connections are needed at the terminal end. An optional modulator changes the pattern intensity spatially or temporally.

REFERENCES:
patent: 3619065 (1971-11-01), Agnew
patent: 3757125 (1973-09-01), Okada et al.
patent: 3800149 (1974-03-01), Lang
patent: 3976382 (1976-08-01), Westby
patent: 4158507 (1979-06-01), Himmel
patent: 4349277 (1982-09-01), Mundy et al.
patent: 4409477 (1983-10-01), Carl
S. H. Rao, CWR Technical Report 529613-81-3, Ohio State University, Sep. 1981, pp. xi, xii, 1-5, 24-41.

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