1,000,000,000,000 Frames/Second Photography

Gravdigr · 08-22-2012, 10:18 PM

No, that's not a misprint.

I found this TED Talk on the 'related' videos, after watching V's "We're NASA And We Know It" video.

ƒucking amazing.

A year to watch a bullet go through an apple.

Griff · 08-23-2012, 07:40 AM

sweet

Sundae · 08-23-2012, 08:59 AM

I found the video interesting, and delivered in a style that made me feel I really understood it, even if I couldn't explain it five minutes later.
But the most exceptional thing was hearing someone with an Indian accent say tom-AY-toe.

I'm easily pleased.

BigV · 08-23-2012, 11:12 AM

DIY.

I'm on it!

glatt · 08-23-2012, 11:25 AM

If this wasn't TED, I'd call BS. Instead, I'm just confused.

Light is very fast. Very fast. I would like to know how the camera works so that you can see light moving. It seems to me that the camera has to function faster than the speed of light to capture the light like that. (Maybe I'm wrong about that, though.) The electricity moving around on the circuit boards inside the camera is only traveling at the speed of light.

He said something about taking multiple exposures to gather enough light to put this together. So is this not actually showing a single pulse of light, but multiple pulses combined electronically? If that's the case, then I can sort of understand it, but I really don't understand how it works. Instead of talking about the images produced, I wish he talked more about how the camera worked. Then I'd believe him. But this is TED, and I've always trusted TED. Hmm.

BigV · 08-23-2012, 11:48 AM

I had to watch it a couple of times to get that too. This is what I've come up with.

Remember he said they fire a *pulse* of laser light, just one trillionth of a second long? It's about yay big (holds fingers an inch apart). That's the little light bullet you see wafting through the Coke bottle. Also illuminating the table, scattering and refracting through the label and the cap. I love the little coda where the bottom of the bottle winks after the bullet leaves the cap and the frame goes dark. Anyhow.

Remember the screen he displayed that was a 3x3 grid of blue fields with various arcing rainbows on it? That was the "raw data". That is what each "frame" looks like before recomposition. Keep this in mind.

Remember the animation of the seeing around corners demo? This is where it all comes together. In that animation they showed the key piece, where the packet is fired from the camera, bounces, splashes all over everything, pieces of the splash hit other things, splash again, repeat until one or two or three lonely photons luckily make their way, independently, asynchronously back to the camera. Remember that?

Well, put all those together, that's how we see the "video" of the pulse's stately march through the bottle. What they kind of gloss over is this: they fire many, *many*, *MANY* of these trillionth-of-a-second pulses. The first one produces lots of data, so does the second one and the third, say you have 15 trillion of these datasets, a trillion to the second for the full fifteen seconds that the bullet/pulse takes to go through the bottle (I'm just estimating that time, work with me). They COMBINE these datasets "computationally" to produce the end result we see here.

It's just like your flying photos, glatt. You took one frame/dataset, you took another frame/dataset, you combined them and the computational result is what you posted of your daughter whirling your son in a superhero/supervillan move. This is doing the same thing. Remember the animation? Only two photons made it back in that animation. It doesn't give a LOT of information. But, if they did another pulse (just a trillionth of a second later) they'd have another two photons or maybe three. A trillion is a really big number, and even if you're only getting couple photons per pulse, if you go bzzzzzt on the PULSING laser you're gonna get a lot of them. Now assemble them. Now you've got your picture around the corner. Or you have your (fraction of a) frame of a movie.

It's a neat trick, and they don't emphasize the many multiples of small pulses it took to make the movie. It looks like ONE pulse moving through the bottle. It's not. It's a picture of a kabillion pulses, all IDENTICAL, but at imperceptibly small increments apart, glued together. Like a movie "moves" when all the pieces are really just a bunch of stills.

glatt · 08-23-2012, 11:54 AM

Quote:

Originally Posted by BigV

It looks like ONE pulse moving through the bottle. It's not. It's a picture of a kabillion pulses, all IDENTICAL, but at imperceptibly small increments apart, glued together.

Thanks. That, I understand and can believe. It would require some real work to do, but it's possible.

Happy Monkey · 08-23-2012, 02:34 PM

It's like using a strobe light to make water droplets "slow down", so it looks like one drop is falling slowly, when actually you are seeing successive drops at different points in their descent.

glatt · 08-23-2012, 02:55 PM

Another excellent explanation.

BigV · 08-23-2012, 05:30 PM

Agreed!

Thanks!

ZenGum · 08-23-2012, 08:33 PM

I think that is it.

I want to know, though, how the hell they make a camera that can function at that kind of speed.

And why the #$%& they didn't take the #$%&ing label off the bottle. WTF???

08-22-2012, 10:18 PM	#1
Gravdigr The Un-Tuckian Join Date: Apr 2007 Location: South Central...KY that is Posts: 39,517	1,000,000,000,000 Frames/Second Photography No, that's not a misprint. I found this TED Talk on the 'related' videos, after watching V's "We're NASA And We Know It" video. ƒucking amazing. A year to watch a bullet go through an apple. __________________ These statements have not been evaluated by the FDA, EPA, FBI, DEA, CDC, or FDIC. These statements are not intended to diagnose, cause, treat, cure, or prevent any disease. If you feel you have been harmed/offended by, or, disagree with any of the above statements or images, please feel free to fuck right off. Last edited by Gravdigr; 08-22-2012 at 10:37 PM.

08-23-2012, 07:40 AM	#2
Griff still says videotape Join Date: Feb 2001 Posts: 26,813	sweet __________________ If you would only recognize that life is hard, things would be so much easier for you. - Louis D. Brandeis

08-23-2012, 08:59 AM	#3
Sundae polaroid of perfection Join Date: Sep 2005 Location: West Yorkshire Posts: 24,185	I found the video interesting, and delivered in a style that made me feel I really understood it, even if I couldn't explain it five minutes later. But the most exceptional thing was hearing someone with an Indian accent say tom-AY-toe. I'm easily pleased. __________________ Life's hard you know, so strike a pose on a Cadillac

08-23-2012, 11:12 AM	#4
BigV Goon Squad Leader Join Date: Nov 2004 Location: Seattle Posts: 27,063	DIY. I'm on it! __________________ Be Just and Fear Not.

08-23-2012, 11:48 AM	#6
BigV Goon Squad Leader Join Date: Nov 2004 Location: Seattle Posts: 27,063	I had to watch it a couple of times to get that too. This is what I've come up with. Remember he said they fire a pulse of laser light, just one trillionth of a second long? It's about yay big (holds fingers an inch apart). That's the little light bullet you see wafting through the Coke bottle. Also illuminating the table, scattering and refracting through the label and the cap. I love the little coda where the bottom of the bottle winks after the bullet leaves the cap and the frame goes dark. Anyhow. Remember the screen he displayed that was a 3x3 grid of blue fields with various arcing rainbows on it? That was the "raw data". That is what each "frame" looks like before recomposition. Keep this in mind. Remember the animation of the seeing around corners demo? This is where it all comes together. In that animation they showed the key piece, where the packet is fired from the camera, bounces, splashes all over everything, pieces of the splash hit other things, splash again, repeat until one or two or three lonely photons luckily make their way, independently, asynchronously back to the camera. Remember that? Well, put all those together, that's how we see the "video" of the pulse's stately march through the bottle. What they kind of gloss over is this: they fire many, many, MANY of these trillionth-of-a-second pulses. The first one produces lots of data, so does the second one and the third, say you have 15 trillion of these datasets, a trillion to the second for the full fifteen seconds that the bullet/pulse takes to go through the bottle (I'm just estimating that time, work with me). They COMBINE these datasets "computationally" to produce the end result we see here. It's just like your flying photos, glatt. You took one frame/dataset, you took another frame/dataset, you combined them and the computational result is what you posted of your daughter whirling your son in a superhero/supervillan move. This is doing the same thing. Remember the animation? Only two photons made it back in that animation. It doesn't give a LOT of information. But, if they did another pulse (just a trillionth of a second later) they'd have another two photons or maybe three. A trillion is a really big number, and even if you're only getting couple photons per pulse, if you go bzzzzzt on the PULSING laser you're gonna get a lot of them. Now assemble them. Now you've got your picture around the corner. Or you have your (fraction of a) frame of a movie. It's a neat trick, and they don't emphasize the many multiples of small pulses it took to make the movie. It looks like ONE pulse moving through the bottle. It's not. It's a picture of a kabillion pulses, all IDENTICAL, but at imperceptibly small increments apart, glued together. Like a movie "moves" when all the pieces are really just a bunch of stills. __________________ Be Just and Fear Not.

08-23-2012, 11:25 AM	#5
glatt ™ Join Date: Jul 2003 Location: Arlington, VA Posts: 27,717	If this wasn't TED, I'd call BS. Instead, I'm just confused. Light is very fast. Very fast. I would like to know how the camera works so that you can see light moving. It seems to me that the camera has to function faster than the speed of light to capture the light like that. (Maybe I'm wrong about that, though.) The electricity moving around on the circuit boards inside the camera is only traveling at the speed of light. He said something about taking multiple exposures to gather enough light to put this together. So is this not actually showing a single pulse of light, but multiple pulses combined electronically? If that's the case, then I can sort of understand it, but I really don't understand how it works. Instead of talking about the images produced, I wish he talked more about how the camera worked. Then I'd believe him. But this is TED, and I've always trusted TED. Hmm.

08-23-2012, 02:34 PM	#8
Happy Monkey I think this line's mostly filler. Join Date: Jan 2003 Location: DC Posts: 13,575	It's like using a strobe light to make water droplets "slow down", so it looks like one drop is falling slowly, when actually you are seeing successive drops at different points in their descent. __________________ _________________ \|...............\| We live in the nick of times. \| Len 17, Wid 3 \| \|_______________\| [pics]

08-23-2012, 02:55 PM	#9
glatt ™ Join Date: Jul 2003 Location: Arlington, VA Posts: 27,717	Another excellent explanation.

08-23-2012, 05:30 PM	#10
BigV Goon Squad Leader Join Date: Nov 2004 Location: Seattle Posts: 27,063	Agreed! Thanks! __________________ Be Just and Fear Not.

08-23-2012, 08:33 PM	#11
ZenGum Doctor Wtf Join Date: Oct 2007 Location: Badelaide, Baustralia Posts: 12,861	I think that is it. I want to know, though, how the hell they make a camera that can function at that kind of speed. And why the #$%& they didn't take the #$%&ing label off the bottle. WTF??? __________________ Shut up and hug. MoreThanPretty, Nov 5, 2008. Just because I'm nominally polite, does not make me a pussy. Sundae Girl.

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