| 摘要 |
<p>The invention relates to a method for three-dimensional storage of data. The method uses a three-dimensional storage medium (2), which can be switched between two stable states by physical excitation. The switching between the states is controlled by controlling the duration and/or the intensity and/or the wavelength of the excitation. The readout of data is effected by detecting the momentary state of the storage medium (2) within a memory cell (3). According to the invention, during writing a selected memory cell (3ijk) is subjected to excitation with at least three directed and concentrated energy beams (4) from at least three directions. The memory cell (3ijk) is positioned in the crossing point of the three energy beams (4). The intensity and/or duration and/or wavelength of the illumination is determined such, that through simultaneous excitation by two energy beams (4) the switching threshold between the states is not reached in any memory cell (3) of the storage medium, while through simultaneous excitation by at least three energy beams (4) the switching threshold is surpassed in any memory cell (3). The invention also relates to an apparatus for performing the method.</p> |
