  The mechanism of wavefront reconstruction by a geometric-optical reflection
of reconstructing light from surfaces with constant phase differences between
the object and reference waves used to record the interference fringe structure
in the medium bulk is analyzed. This mechanism is compared with the holographic
one. Experiments in volume medium and in planar optical waveguide were carried
out. Several types of achromatic optical elements are proposed. The
optoacoustic focusing element, which can create a great local stress in a
special shaped area inside the matter, is discussed. The possibility of the
ultrashort pulse temporal reconstruction is demonstrated.
