電子顕微鏡の照射系に関する実験

抄録

Angular aperture of illumination is measured experimentally and the results are in good agreement with that of theoretical calculation of Borries and' Ruska.
Area of illumination in specimen and relative intensities of electron beam in specimen are calculated from angular aperture experiments.
Two sorts of photographs of multiple sources, which are considered to be one of the causes of multiple images, are obtained. One of these is due to electron emission or reflection at Wehnelt cylinder.
Charging phenomena are observed explained by Rutherford's scattering theory.
Propertied of lenses- are examined and we found that these properties satisfy Busch's formula.