  In coventional imaging experiments, objects are localized in a position space
and such optically responsive objects can be imaged with a convex lens and can
be seen by a human eye. In this paper, we introduce an experiment on a
three-dimensional imaging of a pattern which is localized in a three-dimesional
phase space. The phase space pattern can not be imaged with a lens in a
conventional way and it can not be seen by a human eye. In this experiment, a
phase space pattern is produced from object transparancies and imprinted onto
the phase space of an atomic gaseous medium, of doppler broadened absorption
profile at room temperature, by utilizing velocity selective hole burning in
the absorption profile. The pattern is localized in an unique three dimensional
phase space which is a subspace of the six dimensional phase space. Imaging of
the localized phase space pattern is performed at different momentum locations.
In addition, imaging of the imprinted pattern of an object of nonuniform
transmittance is presented.
