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Dembadon
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I found this demonstration fascinating!
https://www.youtube.com/watch?v=SoHeWgLvlXI
https://www.youtube.com/watch?v=SoHeWgLvlXI
There was a discussion about this on this forum recently and as I recall there was some opprobrium regarding either the process itself or (more likely) the way it was incorrectly described. I don't mean that anyone thought it was a fake or anything like that, just that it wasn't quite what it purported to be.Dembadon said:I found this demonstration fascinating!
phinds said:There was a discussion about this on this forum recently and as I recall there was some opprobrium regarding either the process itself or (more likely) the way it was incorrectly described. I don't mean that anyone thought it was a fake or anything like that, just that it wasn't quite what it purported to be.
Sorry I don't have a link to the thread.
Dembadon said:Gotcha. I'll hunt it down.
By carefully synchronizing the pulsed illumination with the capture of reflected light, we record the same pixel at the same exact relative time slot millions of times to accumulate sufficient signal
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To capture propagation of light in a tabletop scene we need sensor speeds of about 1 ps or one trillion frames per second. To achieve this speed we use a streak tube. The streak camera uses a trick to capture a one dimensional field of view at close to one trillion frames per second in a single streak image. To obtain a complete movie of the scene we stitch together many of these streak images. The resulting movie is not of one pulse, but is an average of many pulses. By carefully synchronizing the laser and camera we have to make sure each of those pulses look the same.
The high-speed photography technique used to capture 1,000,000,000,000 frames per second is known as femtosecond imaging. This method involves using an ultrafast laser pulse to illuminate the subject, and an optical shutter to capture the image at extremely short intervals. The resulting images are then combined to create a video with an incredibly high frame rate.
1,000,000,000,000 frames per second photography has a wide range of applications, including studying ultrafast chemical reactions, capturing high-speed events such as explosions or impacts, and analyzing the dynamics of biological processes. It can also be used in manufacturing and engineering to improve the design and efficiency of products.
Traditional high-speed photography typically captures images at rates of up to 10,000 frames per second, while 1,000,000,000,000 frames per second photography can capture events that occur in just femtoseconds (one quadrillionth of a second). This allows for the visualization of extremely fast processes that would be impossible to capture with traditional techniques.
One major limitation of 1,000,000,000,000 frames per second photography is the amount of data that is generated. Each frame captured contains a vast amount of information, and processing and storing this data can be a significant challenge. Another limitation is the cost of the equipment and expertise required to perform this type of photography.
Yes, scientists and engineers are constantly developing new techniques and equipment to further improve the capabilities of 1,000,000,000,000 frames per second photography. This includes increasing the resolution and depth of field, as well as reducing the cost and size of the equipment. Additionally, researchers are exploring new applications for this technology in fields such as medicine and astronomy.