Subject: RE: RADAR
INVISIBILITY - SLIDE 84 - "FER DE LANCE" INDEX Date: Fri, 19 Apr 2002 16:46:34 -0500
Tony,
Basically it takes
awhile for a photon to be absorbed, excite an orbital electron in the
atom, and then the excited orbital state decay to re-emit the photon.
During that time, one has time to do longitudinal EM wave processing
to essentially do whatever one wishes with the normal "photon
processing" functions of the material (the object). If one is able to
process the longitudinal EM waves that internally comprise normal EM
waves and potentials (radiation), then there appears to be two things
necessary for "invisibility". First, one takes the incoming waves in
one direction, and insures that the opposite side of the object emits
those waves in that magnitude -- which is the magnitude that would be
propagating on the other side of the object if the object were not
there. Actually there is already a longitudinal EM wave component of
all normal incident radiation that passes through the object without
interacting, because only a tad of it is intercepted and diverged. So
something is done like sensing the difference between a given total
spectral set of longitudinal waves incoming in one direction to the
object, and that same spectral set of longitudinal waves going out the
other side with somewhat reduced magnitude. The "smart skins" type
system merely compares the two, senses the difference between incoming
and outgoing sets, adjusts the magnitude of that sampling to equal the
missing difference on the other side, and adds that "missing
difference" in phase in to the signal complex out the other side.
This creates the business of "seeing right through the object". You
don't really see through it, but you see the correct transmitted image
to precisely match what would have come to your eyes if the object
were not there. No DIFFERENCE comes to your eyes, and we see that
object as a "DIFFERENCE". No difference, invisibility of the object
and the illusion of seeing right through it. You really do see
through it a little, then have added the erasure of the difference you
would have seen normally.
That's the first
part of it.
The second part is
to do a similar thing with the reflected signals back off the skin,
from active extra signals (as from a radar). Here you wish to do a
different function: Take the incoming radar signal exactly as it is,
reverse the phase of all signals components and retransmit the exact
signal complex but with phase reversed. That's a "signal
cancellation" transmission and what it does is "remove" any NET
reflected signal back to you from the object. Actually you get back
the reflected signal plus its exact cancellation signal. Unless one
is really smart and modified his detectors to detect changes in stress
potentials, he will not see what has been done, and he will not see
the object. To one who is smart and has added stress potential
detection, he will still be able to see the object.
Now one does not
quite "perfectly" get that cancellation. So one will see a mysterious
black outline or some such, because of the slight imperfection in the
actual physical implementation system.
The net result is
that no reflected
signal is returned to you, but exact replicas of the distant normal
signals that would have impinged on your eye if the object were not
there still reach your eye. Voila! The object "disappears" from
view. That can be visually only, radar only, or in a more
sophisticated case, both radar and visual.
Certain solid state
semiconductors (or special made ones, such as Fogal's chip) can be
rigged to "see" the distant light's longitudinal waves passing through
an object (that part that did not get intercepted and diverged and
absorbed and reflected). With gain adjustment, Fogal's device can
"see right through material objects" and he has so demonstrated.
Couple of nations
(maybe more) did such things and developed their own semiconductors of
similar ilk at least three decades ago.
It also has probably
been "folded in" to the field of "smart materials" --- materials which
themselves act as giant arrays of semiconductors and electronic
circuits. In short, the ultimate integrated circuit. Much of that
material appears classified; e.g., Professor Chung's invention of her
negative resistor has probably been scarfed up and classified. She is
a world-recognized smart materials researcher. Scarfing up the
invention would explain why the offer to send a technical package to
interested major companies signing nondisclosure and interested in
licensing applications was suddenly withdrawn from the University web
site, and why the patent has apparently not been openly issued, and
why Chung cannot discuss it with me. (She did send me the paper that
got openly published, which had been watered down to use the term
"apparent negative resistance".). Note that negative resistance could
play a very dramatic role in smart skins and smart materials
technology in the most critical areas.
Anyway, that's
basically it. It's fundamentally a combination of longitudinal EM
wave technology, changes in semiconductor technology, and
incorporation of such into smart materials and smart skins technology.
Best wishes,
Tom
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