From: Mike (mikew12345@cox.net)
Date: Fri Sep 03 2004 - 15:18:42 MDT
Did you view the .mpg in the 2nd link? That was no photograph, the guy
is standing on a street and you can see the cars moving behind him.
It's far from perfect invisibility, but given the rough, nonuniform
surface of his clothing, it's pretty good. Using the flat surfaces of a
plane, and the uniform color of the sky on a clear day, it doesn't look
impossible. But then, just fly at night if you don't want to be seen.
Radar poses a bigger danger to aircraft than visibility, and that's why
we have stealth aircraft.
Mike W.
> -----Original Message-----
> From: owner-sl4@sl4.org [mailto:owner-sl4@sl4.org] On Behalf
> Of Alfio Puglisi
> Sent: Friday, September 03, 2004 11:53 AM
> To: sl4@sl4.org
> Subject: RE: Book Review "Nano" No spoilers
>
>
> On Fri, 3 Sep 2004, Mike wrote:
>
> >http://projects.star.t.u-tokyo.ac.jp:/projects/MEDIA/xv/oc.html
> >
> >http://projects.star.t.u-tokyo.ac.jp:/projects/MEDIA/xv/image
> s/oc-okuga
> >i
> >3.mpg
> >
> >
> >It's been done with clothing in Japan.
>
> If I understand correctly, this is a much simpler: it's a
> photograph pf the background project on a reflective piece of
> clothing. Really cool to see, but useless for invisibility.
>
> Alfio
>
> >
> >> -----Original Message-----
> >> From: owner-sl4@sl4.org [mailto:owner-sl4@sl4.org] On
> Behalf Of Eugen
> >> Leitl
> >> Sent: Friday, September 03, 2004 5:44 AM
> >> To: sl4@sl4.org
> >> Subject: Re: Book Review "Nano" No spoilers
> >>
> >>
> >> On Fri, Sep 03, 2004 at 03:58:06AM -0700, Thomas Buckner wrote:
> >> >
> >> > --- Keith Henson <hkhenson@rogers.com> wrote:
> >> >
> >> >
> >> > > In another place Marlow describes an invisible
> >> > > aircraft, one that has light
> >> > > emitters on it that make the surface of the
> >> > > aircraft look like the
> >> > > background and the story line makes use of the
> >> > > invisible properties of the
> >> > > aircraft. It is reasonable to assume that we
> >> > > could eventually have
> >> > > aircraft surfaces that can display the view
> >> > > blocked by the aircraft. But
> >> > > if you think about it, to do this you have to
> >> > > know exactly what direction
> >> > > you want to fool someone. Otherwise, you don't
> >> > > know what background to
> >> > > present. This is applying pre high school
> >> > > geometry and a bit of logic.
> >>
> >> You have to fake the wavefront in the VIS wavelenght range, which
> >> asks for phased array optics and sensors, and a computer to drive
> >> them.
> >>
> >> All of this is not very difficult with bulk nanoelectronics.
> >>
> >> This will work in VIS, but it will be impossible to sustainably
> >> prevent a huge emission in far IR.
> >>
> >> Can you dissipate the power anisotropically, anyone knows?
> >>
> >> > This has been done, primitively. Some WW2
> >> > antisubmarine aircraft had rows of light bulbs on
> >> > the leading edge of the wings which caused the
> >> > aircraft to blend into the background light of
> >> > the sky until it was too close for the sub to
> >> > dive. It did work.
> >>
> >> --
> >> Eugen* Leitl leitl
> >> ______________________________________________________________
> >> ICBM: 48.07078, 11.61144 http://www.leitl.org
> >> 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE
> >> http://moleculardevices.org http://nanomachines.net
> >>
> >
> >
>
>
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