Device which makes it possible to effect the programmed tracing

Details Device which makes it possible to effect the programmed tracing Device which makes it possible to effect the programmed tracing

1977-05-13

1978-08-29

Dixon, Harold A.

Radiant energy

With charged particle beam deflection or focussing

Magnetic lens

250396ML, G21K 108

Patent

active

041106229

ABSTRACT:
A device to effect the programmed tracing of figures which have different shapes comprises two electron-optical systems respectively associated with two diaphragms. The first system forms the image of the first diaphragm at a fixed magnification, on the second diaphragm. The first electrically controlled deflection system makes it possible to displace said image in said plane. A second system forms an image of the thus defined diaphragm, in the object plane. A second deflection system makes it possible to displace said latter image in the object plane.

REFERENCES:
patent: 2356535 (1944-08-01), Ruska
patent: 3629575 (1971-12-01), Rakels
patent: 3857034 (1974-12-01), Hoppe
patent: 3996468 (1976-12-01), Fletcher

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