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公开(公告)号：US20210192178A1
公开(公告)日：2021-06-24
申请号：US17086608
申请日：2020-11-02
Applicant: HITACHI, LTD.
Inventor： Ryoko ARAKI , Teruo KOHASHI , Jun XIE
Abstract: In an image acquisition system, a distortion distribution is easily measured in a wide range. A standard image of magnetic domain of a sample serving as a standard is acquired by radiation of light using a standard external magnetic field which serves as a standard, a plurality of magnetic domain images are acquired in a state where an external magnetic field is applied while being changed, a plurality of subtraction images obtained by subtracting the standard image of magnetic domain from each of the plurality of magnetic domain images are acquired, a magnetization reversal area in which a magnetic domain is reversed is extracted from each of the plurality of subtraction images, and a composite image having a plurality of magnetization reversal areas is acquired by compositing the plurality of subtraction images each having the magnetization reversal area.
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