Process for controlling the strike positions of a plurality of electron beams on a melting bath
AssigneeLeybold Aktiengesellschaft
InventorsWalter Dietrich, Horst Ranke, Herman Stumpp, Claus Heuser
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Abstract
The invention pertains to a process for the control of the strike positions of a plurality of electron beams on a melting bath. In this case, the light beams issuing from the surface of the melting bath are sent to a radiation splitter, the separated beams of which, as the case may be, are sent via additional radiation splitters to photoelectric sensors. The output signals of these sensors are sent to a control, which guides the electron beam guns, from which the electron beams issue.
Claims12
A process for controlling positions of strike points of a plurality of electron beams on a melting bath, wherein electromagnetic radiation occurs which is greater at the strike points than in a field surrounding the strike points, comprising the steps of:
- sensing the electromagnetic radiation at as many different locations on a surface of the melting bath as there are electron beams;
- dividing the electromagnetic radiation into partial beams;
- and,
- guiding deflection of the electron beams based on a difference between the partial beams.
Dependencies are inferred from the claim text.