FIELD: electronics. SUBSTANCE: modulator of intensity of electron beam has deflecting plates, aperture diaphragm and focusing lens positioned uniaxially. Center of deflection of plates matches center of object plane of focusing lens aligned with plane of smallest section of electron beam. Description of invention presents expression for selection of length of deflecting plates. EFFECT: reduced voltage and power of modulating signal. 1 dwg
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Authors
Dates
1994-03-30—Published
1991-12-26—Filed