Optical viewing system for an electron beam welder

Details Optical viewing system for an electron beam welder Optical viewing system for an electron beam welder

1976-05-17

1978-05-16

Truhe, J. V.

Electric heating

Metal heating

By arc

165185, 350 61, B23K 900

Patent

active

040900568

ABSTRACT:
An electron beam welding device having a vacuum chamber in which an electron gun directs a beam of electrons at a work piece, wherein the optical system for viewing the point of impact of the beam with the work piece includes a light reflecting element in the form of a prism. The prism is positioned in the vacuum chamber to one side and closely adjacent the path of the electron beam and has a first surface extending substantially perpendicular to the beam. This surface is protected by a strip of transparent plastic material having a portion extending across the surface of the prism, the strip being movable to permit the portion to be continuously replaced as it becomes clouded. An open mesh conductive screen is positioned between the impact area and the strip to at least partially screen the material from infrared and X-ray radiation, otherwise acts to rapidly reduce the transparency of the strip.

REFERENCES:
patent: 3156810 (1964-11-01), Samuelson
patent: 3571554 (1971-03-01), Baujoin et al.

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