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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
MIT published a few papers on it, and they're available for download from the MIT group site.
To cut a long story short, they cheated. The light is a very accurately timed and short pulse from a Ti:sapphire laser. They shoot it over and over, capturing the scene with a streak camera and probably integrating a lot of shots. The streak camera produces a 2-D image, which represents how one vertical line of the scene changes throughout the movie. Then they move a mirror slightly to capture the next scanline of the scene and do it again.
So, it shoots 3 trillion FPS but takes a day to make a 5 second movie, and they call this progress!
Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
Yes, I read the link and can see that it is not exactly what I thought. I was hoping that if it truely could capture 3trill with one sitting, then maybe one could observe what happens when light hits a slit and follow the photon, seeing how it behaves as a wave or particle. But if it has to be done over and over, this will not help.
Registered Member #3766
Joined: Sun Mar 20 2011, 05:39AM
Location:
Posts: 624
Steve Conner wrote ...
MIT published a few papers on it, and they're available for download from the MIT group site.
To cut a long story short, they cheated. The light is a very accurately timed and short pulse from a Ti:sapphire laser. They shoot it over and over, capturing the scene with a streak camera and probably integrating a lot of shots. The streak camera produces a 2-D image, which represents how one vertical line of the scene changes throughout the movie. Then they move a mirror slightly to capture the next scanline of the scene and do it again.
So, it shoots 3 trillion FPS but takes a day to make a 5 second movie, and they call this progress!
You don't call it progress? Has anyone else ever watched light move in a video? It might not be useful for something high explosive, but for anything involving light or lasers it can me quite useful.
the fact that it needs to scan multiple times is irrelevant to the double slit experiment, as this will only see photons directed towards the camera. A single photon wouldn't show up anyway.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
magnet18 wrote ...
Steve Conner wrote ...
MIT published a few papers on it, and they're available for download from the MIT group site.
To cut a long story short, they cheated. The light is a very accurately timed and short pulse from a Ti:sapphire laser. They shoot it over and over, capturing the scene with a streak camera and probably integrating a lot of shots. The streak camera produces a 2-D image, which represents how one vertical line of the scene changes throughout the movie. Then they move a mirror slightly to capture the next scanline of the scene and do it again.
So, it shoots 3 trillion FPS but takes a day to make a 5 second movie, and they call this progress!
You don't call it progress? Has anyone else ever watched light move in a video? It might not be useful for something high explosive, but for anything involving light or lasers it can me quite useful.
the fact that it needs to scan multiple times is irrelevant to the double slit experiment, as this will only see photons directed towards the camera. A single photon wouldn't show up anyway.
(also, I think you meant 1-D)
Im sure it has its usefullness, but not as advertised in the way everyone thinks of "X frames per second" as a speed for cameras.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
No, I meant 2-D. The streak camera images a 1-D "line" of the scene, and sweeps it across a screen like an oscilloscope. So it produces a 2-D image where one of the dimensions is space and the other is time.
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MIT camera takes 3 trillion frames/second
