Transmission electron microscope electron diffraction CCD imaging device

Abstract

The invention relates to a transmission electron microscope electron diffraction CCD imaging device. The transmission electron microscope electron diffraction CCD imaging device comprises a transmission shaft and a protection sleeve; one end of the transmission shaft is an enlarged portion, and the other end of the transmission shaft is connected with a shielding portion; the protection sleeve is fixed at one side surface of a vacuum protection box; a coaxial through hole is formed in the protection sleeve and the vacuum protection box; the transmission shaft is inserted in the through hole of the protection sleeve and the vacuum protection box; the enlarged portion of the transmission shaft is arranged to one side of the protection sleeve; the shielding portion is arranged to one side of the vacuum protection box; the vacuum protection box is connected with the lens barrel of a transmission electron microscope electron; and the shielding portion extends into the transmission electron microscope electron so as to shield a transmission light source. With the transmission electron microscope electron diffraction CCD imaging device of the invention adopted, the problems of complex negative film shooting and high possibility of data loss in existing electron diffraction CCD imaging can be solved, and the influence of the noises of a mechanical pump of a negative film chamber on the resolution of the transmission electron microscope can be avoided, and a transmission electron microscope electron diffraction CCD imaging function can be realized.

Description

technical field [0001] The invention relates to a transmission electron microscope electron diffraction CCD imaging functional device. Background technique [0002] Transmission Electron Microscope (TEM for short), referred to as TEM, is to project the accelerated and concentrated electron beam onto a very thin sample, and the electrons collide with the atoms in the sample to change the direction, thereby producing solid angle scattering (scattering angle The size of the sample is related to the density and thickness of the sample), and can form images with different brightness and darkness, which are finally displayed on imaging devices (such as fluorescent screens, films, and photosensitive coupling components) after zooming in and focusing. [0003] Due to the very short de Broglie wavelength of the electron, the resolution of the transmission electron microscope is much higher than that of the optical microscope, which can reach 0.1-0.2nm, and the magnification is tens o...

AI Technical Summary

Problems solved by technology

It has been reported in the literature that the vacuum degree of the film chamber is controlled by the microcomputer to reduce the influence of the exhaust and noise of the mechanical pump on the photographic effect of the film, but so far, this technology has not fundamentally changed the problem of difficulty in obtaining electron diffraction data.

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