Laser machining apparatus

Details Laser machining apparatus Laser machining apparatus

1982-05-05

1985-10-15

Albritton, C. L.

Electric heating

Metal heating

By arc

219121LP, 219121LQ, 372 15, 372 92, 372106, B23K 2600

Patent

active

045476519

ABSTRACT:
A laser machining apparatus includes an optical resonator for generating a laser beam and two polarizers disposed in the form of a V within the optical resonator to linearly polarize the laser beam. The linearly polarized laser beam is focussed on a workpiece for cutting purposes while the workpiece is moved in two orthogonal directions. The polarizers are rotated about the optical axis of the laser beam in correspondence with the two dimensional movement of the workpiece to rotate a plane of polarization of the beam to coincide with a cutting direction of the beam. Alternatively, a linearly polarized laser beam from a laser oscillator is circularly polarized with a quarter wave plate and then linearly polarized by a rotatable quarter wave plate to form a cutting beam. The rotatable quarter wave plate is rotated in the same manner as the polarizers to rotate a plane of polarization of the cutting beam.

REFERENCES:
patent: 3243724 (1966-03-01), Vuylsteke
patent: 3407364 (1968-10-01), Turner
patent: 3410979 (1968-11-01), Larsson
patent: 3928814 (1975-12-01), Feichtner
patent: 4015221 (1977-03-01), Dalton
patent: 4305046 (1981-12-01), LeFloch et al.
Graphical Method to Design Multilayer Phase Retarders, Joseph H. Apfel, Applied Optics, vol. 20, No. 6, Mar. 15, 1981, pp. 1024-1029.

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