| 摘要 |
Provided is a phase plate for an electron microscope, which can prevent an electron beam loss effectively, can find an application to an acceleration voltage over a wide range from low to high voltages, can go into practical use without being accompanied by difficulty in its manufacture, and can attain an image of a high contrast. The phase plate is constructed by spanning the opening of a support member (14) with either a portion of a magnetic thin-wire ring or a magnetic thin-wire rod (15), and is characterized in that the magnetic thin-wire ring or the magnetic thin-wire rod (15) establishes a vector potential, and in that a phase difference is made between electron beams to pass through the two left and right sides of either the spanning portion of the magnetic thin-wire ring or the magnetic ring-wire rod (15). |
