On 12/14/2011 2:40 PM, Igor Roshchin wrote:
Frank, no, there are processes that are done on a faster time scale.
There are attosecond lasers , that are capable producing ~80 attosecond
pulses. (1 attosecond is 10^-18 s - 0.000 000 000 000 000 001 s)
As of 2010, the shortest time interval measured is 12 attoseconds.
This is at least 1000-10000 times faster than the scale of the
MIT's camera.
And if you do well in their lab, they give you an attoboy.
But what is interesting, is that essentially this group does an analog
of the "HDR", but in the times space: they repeat the same images
of a nanosecond process over a span of an hour or so, - to get
3D picture of the process.
Aha! It's not so much a 10^12 hertz frame rate, but that they take
multiple exposures at picosecond accuracy and precision. I was wondering
how they'd actually detect individual photons.
You can read about that here (general audience level):
http://web.mit.edu/newsoffice/2011/trillion-fps-camera-1213.html
For more technically inclined, - you can see the presentation here:
http://www.youtube.com/watch?v=aKu20y1f_RU
It looks like the actual videos are at about 22:00 minutes in. IIRC, a
nanosecond is about a foot, so that whole movie represents something
like half a nanosecond.
Mark, thanks for posting it.
Maybe they could team up with the lytro folks and do terahertz
lightfield movies, to back process a three dimensional model of the path
of a photon. That's probably good for a CPU cycle or two.
Cheers,
Igor
Tue Dec 13 23:56:20 EST 2011
knarftheriault at gmail.com wrote:
'Cause any more would just be extravagant. (and probably theoretically
impossible - I'm thinking that time can't be divided into smaller
increments)
cheers,
frank
--- Original Message ---
From: Mark Roberts<mark at robertstech.com>
Sent: December 13, 2011 12/13/11
To: "Pentax-Discuss Mail List"<pdml at pdml.net>
Subject: How many fps is enough?
Would one TRILLION frames per second be sufficient?
http://news.cnet.com/8301-11386_3-57342136-76/shutter-speed-demon-camera-takes-trillion-frames-per-second/
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Larry Colen [email protected] (from dos4est)
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