Electron Microscope and Image Acquisition Method
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United States of America Patent
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Issued Date -
Apr 27, 2023
app pub date -
Oct 26, 2022
filing date -
Oct 27, 2021
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Abstract
An electron microscope includes an electron source for emitting an electron beam, an illumination lens for focusing the beam, an aberration corrector for correcting aberrations, an illumination deflector assembly disposed between the illumination lens and the aberration corrector and operating to deflect the beam and to vary its tilt relative to a sample, a scanning deflector for scanning the sample with the beam, an objective lens, a detector for detecting electrons transmitted through the sample and producing an image signal, a control section for controlling the illumination deflector assembly, and an image generating section for receiving the image signal and generating a differential phase contrast (DPC) image. The tilt of the beam is varied by the illumination deflector assembly such that the image generating section generates a plurality of DPC images at different tilt angles of the beam and creates a final image based on the DPC images.
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