A Trillionth-of-a-Second Shutter Speed Camera Catches Chaos in Action (sciencealert.com) 21
Long-time Slashdot reader turp182 shares two stories about the new state-of-the-art in very-high-speed imaging. "The techniques don't image captured photons, but instead 'touch' the target to perform imaging/read structures using either lasers or neutrons."
First, Science Daily reports that physicists from the University of Gothenburg (with colleagues from the U.S. and Germany) have developed an ultrafast laser camera that can create videos at 12.5 billion images per second, "which is at least a thousand times faster than today's best laser equipment." [R]esearchers use a laser camera that photographs the material in [an ultrathin, one-atom-thick] two-dimensional layer.... By observing the sample from the side, it is possible to see what reactions and emissions occur over time and space. Researchers have used single-shot laser sheet compressed ultrafast photography to study the combustion of various hydrocarbons.... This has enabled researchers to illustrate combustion with a time resolution that has never been achieved before. "The more pictures taken, the more precisely we can follow the course of events...." says Yogeshwar Nath Mishra, who was one of the researchers at the University of Gothenburg and who is now presenting the results in a scientific article in the journal Light: Science & Applications.... The new laser camera takes a unique picture with a single laser pulse.
Meanwhile, ScienceAlert reports on a camera with a trillionth-of-a-second shutter speed — that is, 250 million times faster than digital cameras — that's actually able to photograph atomic activity, including "dynamic disorder." Simply put, dynamic disorder is when clusters of atoms move and dance around in a material in specific ways over a certain period — triggered by a vibration or a temperature change, for example. It's not a phenomenon that we fully understand yet, but it's crucial to the properties and reactions of materials. The new super-speedy shutter speed system gives us much more insight into what's happening....
The researchers are referring to their invention as variable shutter atomic pair distribution function, or vsPDF for short.... To achieve its astonishingly quick snap, vsPDF uses neutrons to measure the position of atoms, rather than conventional photography techniques. The way that neutrons hit and pass through a material can be tracked to measure the surrounding atoms, with changes in energy levels the equivalent of shutter speed adjustments.
First, Science Daily reports that physicists from the University of Gothenburg (with colleagues from the U.S. and Germany) have developed an ultrafast laser camera that can create videos at 12.5 billion images per second, "which is at least a thousand times faster than today's best laser equipment." [R]esearchers use a laser camera that photographs the material in [an ultrathin, one-atom-thick] two-dimensional layer.... By observing the sample from the side, it is possible to see what reactions and emissions occur over time and space. Researchers have used single-shot laser sheet compressed ultrafast photography to study the combustion of various hydrocarbons.... This has enabled researchers to illustrate combustion with a time resolution that has never been achieved before. "The more pictures taken, the more precisely we can follow the course of events...." says Yogeshwar Nath Mishra, who was one of the researchers at the University of Gothenburg and who is now presenting the results in a scientific article in the journal Light: Science & Applications.... The new laser camera takes a unique picture with a single laser pulse.
Meanwhile, ScienceAlert reports on a camera with a trillionth-of-a-second shutter speed — that is, 250 million times faster than digital cameras — that's actually able to photograph atomic activity, including "dynamic disorder." Simply put, dynamic disorder is when clusters of atoms move and dance around in a material in specific ways over a certain period — triggered by a vibration or a temperature change, for example. It's not a phenomenon that we fully understand yet, but it's crucial to the properties and reactions of materials. The new super-speedy shutter speed system gives us much more insight into what's happening....
The researchers are referring to their invention as variable shutter atomic pair distribution function, or vsPDF for short.... To achieve its astonishingly quick snap, vsPDF uses neutrons to measure the position of atoms, rather than conventional photography techniques. The way that neutrons hit and pass through a material can be tracked to measure the surrounding atoms, with changes in energy levels the equivalent of shutter speed adjustments.
Actual Video In Action Here (Score:1, Offtopic)
https://youtu.be/EtsXgODHMWk?t... [youtu.be]
The articles linked did not contain actual footage. Kinda pointless without video.
Re:Actual Video In Action Here (Score:4, Interesting)
+1 interesting, and that's from December 13, 2011 project.
Here's more information on the Slashdot post, but no video:
"World’s fastest laser camera films combustion in real time" - https://www.gu.se/en/news/worl... [www.gu.se]
"Single-pulse real-time billion-frames-per-second planar imaging of ultrafast nanoparticle-laser dynamics and temperature in flames" - https://www.nature.com/article... [nature.com]
Re: (Score:3)
Interesting. If they are taking 12.5 billion images per second, then they are taking a new image every 80 picoseconds. Light only travels 24 mm (about one inch) in 80 picoseconds, so the distance from the object to the sensor becomes very important to understanding exactly when the image happened.
Like imaging the stars, you can only document what is being seen, not what is actually happening "now". Even sunlight we see takes eight minutes to travel from the Sun to Earth. When imaging items in 80 trillio
Re: Actual Video In Action Here (Score:1)
Flash back (Score:3, Interesting)
To 1960, when a laser was a solution in search of a problem.
https://ask.metafilter.com/148... [metafilter.com]
It Didn't Happen (Score:2)
Re: It Didn't Happen (Score:4, Interesting)
I feel you bro. No pictures means no camera. This technique is a scientific instrument, but camera is the wrong appellation.
Re: (Score:1)
Maybe they have to recover their huge costs by charging viewers and news sites.
content unavailable (Score:2)
iPhone xx (Score:2)
When will this be part of the iPhone imaging hardware? :)
Re: (Score:2)
Nah... after the moons images debarcle I suspect Samsung will have this feature in the phones by Friday :-D
Faster than a speeding bullet (Score:2)
What does this mean, then? Asked Neo
That I can dodge bullets?
What it means: where you're going, you won't have to
Dear EditorDavid (Score:2)
Funny, I just saw a video about... (Score:1)
Extreme Power Lasers or something similar. It was from the Royal Institute on YouTube. They briefly talked about HOW they get these huge power levels.
Power per area per second is the measurement. So if you can focus a broader beam more narrow, the max measurable power levels increase.
And if you can constructively combine multiple waves it'll amplify the resulting power. They'd separate a signal by wavelength, then amplify each part separately, then combine them again at the end.
But you can also destruct
Not direct imaging (Score:1)
The second story is one of those things that happens when science communicators get hold of science that is exciting but which they don't really understand. They think that by turning 'neutron diffraction instrument' into 'camera' they will make the science comprehensible to a wider audience, but all they do is misrepresent it.
Normal crystallography shows you how atoms in a crystal are arranged on average - based on the assumption that you can construct a crystal (say, of germanium and tellurium, as in the
Great gig if you can get it. (Score:2)
Get the hell off this planet!1 (Score:2)
It is against the law to have such an article and none of the links have such a video.
One article has a kind soul who posted a video link in the comments. Someone modded it off topic. In formal logic, that person needs murdering.
Re: (Score:2)
Eh I take that back. The posted video was of the old technique of taking an individual photograph of a pulse of light as it traveled through a liquid, then another on a second pulse a miniscule fraction of a second later, then another pulse. Reassembled, the frames if the many pulses look like one slo-mo pulse traveling through the liquid.
I hope no one followed the formal logic.
in 6 months... (Score:2)
...Alienware will be insisting that 12.5 billion fps really is the new gaming pc minimum "for serious gamers".
How can we be sure (Score:2)
that it isn't the image-gathering process that is chaotic, rather than the subject of the images? Is it possible that at that speed, the signal-to-noise ratio overwhelms the precision of the signal itself?