Patent · US Expired

Process for controlling the strike positions of a plurality of electron beams on a melting bath

US4988844A · kind A · utility

77Cited by

3References

12Claims

0Family size

Assignee

Leybold A.G. · DE

Inventors

Walter Dietrich · Yorktown Heights, US
Horst Ranke · Alzenau, DE
Herman Stumpp · Alzenau, DE
Claus Heuser · Alzenau, DE

Key dates

Filing date	Feb 16, 1990
Grant date	Jan 29, 1991
Priority date	—
Expiry date	Feb 16, 2010

Classification

Technology area (CPC H)Electricity
CPC primaryH01J2237/24578
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.