Appeal No. 2000-0700
Application No. 08/453,320
BACKGROUND
The appellant's invention relates to a two-photon four-dimensional optical
memory. An understanding of the invention can be derived from a reading of
exemplary claim 1, which is reproduced below.
1. A radiation memory comprising:
a three-dimensional volume of a medium
that is sensitive to radiation in its absorption band so as to undergo an
anomalous, stable, change in a physical property of the medium, which physical
property affects the passage of radiation through the medium, from a first level to a
second level,
that, regardless of a prevailing level of the physical property of the
medium, has and exhibits a relatively greater impediment to a transmission of radiation
of a relatively shorter wavelength, a relatively higher frequency and a relatively higher
energy in a straight path through the medium, and
that, regardless of a prevailing level of the physical property of the
medium, has and exhibits a relatively lesser impediment to a transmission radiation of a
relatively longer wavelength, a relatively lower frequency and a relatively lower energy
in a straight path through the medium; and
radiation-directing means for directing two radiation pulses,
each of which has an individual wavelength sufficiently long, a frequency
sufficiently low and an energy sufficiently low so as to be non-interactive with the
medium to cause (i) any change in the physical property of the medium, or (ii) any
change in a straight-line propagation, which straight-line propagation through the
medium is unaffected regardless of what level of its physical property the medium
exhibits along the path or portions thereof,
to temporal and spatial intersection within the volume of the medium so that, by
satisfaction of the quantum mechanical equations of two-photon interaction, (i) a portion
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