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Index > Heap > Femto-Photography: Visualizing Photons in Motion

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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
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LocoDelAssembly
Post 15 Nov 2012, 13:56
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sleepsleep



Joined: 05 Oct 2006
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sleepsleep
very beautiful,
Post 15 Nov 2012, 14:22
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Coty



Joined: 17 May 2010
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Coty
Amassing, I want this in massive resolution, I need it for my pet robot.
Post 15 Nov 2012, 15:51
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Enko



Joined: 03 Apr 2007
Posts: 678
Location: Mar del Plata
Enko
In the video he cheats a little bit. I read somewhere that its not capturing the motion. But it takes diferent snapshots many times and then, by software then generate the image.

It the video its sounds like they are filming photones but what they really doing is taking lots of photos and then by software generating the video.
Post 16 Nov 2012, 22:49
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tthsqe



Joined: 20 May 2009
Posts: 724
tthsqe
yeah, the title is misleading
I am no physicist, but the idea 'picture of photon(s)' seems oxymoronic
they are really seeing the places on the bottle and in the air where a sufficient number of photons have been scattered and reflected back to the camera
Post 16 Nov 2012, 23:26
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
It is actually explained in the TED talk, because the exposure is so short they need to repeat the experiment millions of times, so the reconstruction is relaying on the light and bodies behaving exactly the same (up to the resolution scope) each time.

BTW, the bottle is almost full of some turbid liquid, with only two bubbles of air, that is why there is so much light scattered towards the camera and table.

In the other videos, I think it is not thoroughly explained in the TED talk, but what you actually see is a short pulse of the laser hitting a mirror and then the light scattered from the mirror illuminates the scene like a "light sphere" growing each frame, so those waves/ripples are happening when the sphere intersects the bodies and in turn the light is scattered back reaching the camera.
Post 17 Nov 2012, 00:03
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