Back reflection monitor and method

Details Back reflection monitor and method Back reflection monitor and method

1987-08-18

1988-10-11

Albritton, C. L.

Electric heating

Metal heating

By arc

21912174, 21912162, B23K 2602

Patent

active

047773413

ABSTRACT:
A beam monitor comprises a mirror for reflecting an incident beam of radiation to a target and for receiving a reflected beam from the target and has a surface on which the beams impinge. Incident and reflected beam channels are orthogonally disposed within the mirror. Each of the channels has an opening disposed in the surface for admitting the associated beam thereto. First and second detectors are operably associated with the mirror and each generates a signal indicative of a selected characteristic of the beam illuminating the associated channel. A controller compares the generated signals and thereby monitors at least one selected characteristic of the target or of the beam.

REFERENCES:
patent: 3892488 (1975-07-01), Edmonds
patent: 4358467 (1982-11-01), Patel
patent: 4380694 (1983-04-01), Dyson
patent: 4423726 (1984-01-01), Imasawa et al.
patent: 4476512 (1984-10-01), Sunago et al.
patent: 4572941 (1986-02-01), Sciaky et al.
patent: 4582809 (1986-04-01), Block et al.

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