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单词 unipotential electrostatic lens
释义 unipotential electrostatic lens
[¦yü·nǝ·pǝ`ten·chǝl i¦lek·trǝ¦stad·ik `lenz]
ELECTRONICS
An electrostatic lens in which the focusing is produced by application of a single potential difference; in its simplest form it consists of three apertures of which the outer two are at a common potential, and the central aperture is at a different, generally lower, potential.
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