Method of ion imaging with additional control fields

Details Method of ion imaging with additional control fields Method of ion imaging with additional control fields

1974-10-16

1976-09-14

Martin, Jr., Roland E.

Gas separation: apparatus

Magnetic separating means

346 74ES, 346 74J, G03G 1322

Patent

active

039804747

ABSTRACT:
An ion modulator process capable of producing copies of high contrast and with low background utilizes a constant charge density applied in the dark to set up uniform fringing fields which block ions directed towards background (light) areas. Funneling fields are set up in image (dark) areas in opposition to the original uniform fringing fields by simultaneous imaging and ion projection decreasing the effect of such fringing fields and permitting ions to pass through the modulator in image areas.

REFERENCES:
patent: 3645614 (1972-02-01), McFarlane
patent: 3680954 (1972-08-01), Frank
patent: 3694200 (1972-09-01), Pressman
patent: 3761173 (1973-09-01), Fotland et al.
patent: 3881921 (1975-05-01), Frank

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