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[AlphaPhoenix] built a 1,000,000,000 fps video camera to watch light move (www.youtube.com)

submitted 1 week ago by barsoap@lemm.ee to c/technology@lemmy.world

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blurb:

So apparently buying a high speed camera wasn't enough, because after two videos with it I decided to build my own, but 5 orders of magnitude faster…

In this video I'm filming the motion of light as it flies across my garage at… well, the speed of light! It's fast. So fast that even with my best setup so far, I get 18 frames of video from one end of the room to the other, and those frames have a lot of temporal blur so realistically each "frame" is actually kind of an average of the information that by right should belong to 5-10 frames. It's a mess, but it works.

I'm using the technique from the electricity waves video where I used repeated oscilloscope measurements synced after the fact to produce "videos" of electricity moving down a wire. The only difference is that instead of measuring electricity waves, I'm measuring light emitted by a laser, bouncing off the wall, traveling to my camera, and landing in the window of a photomultiplier tube. UNLIKE the electricity waves video, this setup (thankfully) is automated, and an optics assembly slews across angle space, building up a 3d dataset of video, collecting all the time information from each pixel sequentially.

It's a really fun project that I've wanted to do for a long time, and just recently got pulled together.

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[+] Mr_Blott@feddit.uk -32 points 1 week ago (4 children)

Fuckin YouTubers

Here's a 30 minute video of me waffling about 4 seconds of what you actually wanted to see

[–] barsoap@lemm.ee 17 points 6 days ago

You know there's a seek bar on youtube videos?

[–] astropenguin5@lemmy.world 13 points 6 days ago

I mean, he does show the final product pretty early on. Plus as others said, the video (and most of the channel) is about how and why it works, which to me is much more interesting than the 4 second clip.

[–] MangoPenguin@lemmy.blahaj.zone 13 points 6 days ago* (last edited 6 days ago)

So you don't want to watch anything about how it's done or how it was built?

I suggest TikTok then. Or just don't click on things you don't really want to learn about.

[–] dependencyinjection@discuss.tchncs.de 37 points 1 week ago

Odd take.

I for one love AlphaPhoenix and I prefer longer form videos. I don’t want the look what I did, but I want the this is how I did it.

Piss off to TikTok if you just want to be mindlessly fed short form trash.