Tohoku University Technology: Electron beam modulator and its modulation method: T20-1565
Electron round lens using optical field that can correct spherical aberration.
Since the invention of the electron microscope (EM), electrostatic and magnetic round lenses (with cylindrically symmetric lensing action) have been used in the field of charged particle optics. These lenses in principle incapable of producing negative spherical aberration, which had long limited the spatial resolution of EMs. Modern EMs are equipped with spherical aberration correctors consisting of multipole lenses and achieve angstrom-scale resolution. However, such devices are expensive (over a million dollars) and complicated systems. This invention solves above problems in order to have high precision, simple and low-cost electron beam focusing device. It claims the configuration of electron round lens, including concave lens with positive spherical aberration and convex lens with negative spherical aberration due to cylindrically symmetric polarized light beam.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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