A field-emission shadow microscope was constructed and its characteristics were exa-mined with a field-emitter tip as a specimen. Change of the shadow image with the ratio of object tip potential to projector tip potential is presented and a qualitative explanation given. The potential ratio which gives the best shadow image and the magnification
M are presented as a function of projector-object spacing
d. It is confirmed that
M is approximately given by
D/
d, where
D is a projector-fluorescent screen distance. The distortions of the shadow images are briefly discussed.
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