FIELD RADIATION TYPE ELECTRON GENERATOR

Title:

FIELD RADIATION TYPE ELECTRON GENERATOR

Document Type and Number:

Japanese Patent JP53126860

Kind Code:

A

Abstract:

PURPOSE: To ensure a proper cleansing of the field radiation cathode without depending on the man's experience, which can be applied effectively to a scan-type electronic microscope, by providing a flashing circuit plus a means to display the flashing degree.

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Inventors:

Okura, Akimitsu
Yamada, Osamu

Application Number:

JP1977000041344

Publication Date:

November 06, 1978

Filing Date:

April 13, 1977

Export Citation:

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Assignee:

HITACHI LTD

International Classes:

H01J37/073; H01J1/30; H01J1/304; H01J37/06; H01J37/06; H01J1/30; (IPC1-7): H01J1/30; H01J37/06

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