A laser pointer at 2B FPS [video]
youtube.com
A laser pointer at 2B FPS [video]
1–10 of 115 posts
Re: A laser pointer at 2B FPS [video]
#2The view from one end of a laser going between two mirrors (timestamp 1:37) is a fairly good demonstration of the camera having to wait for light to get to it.
Re: A laser pointer at 2B FPS [video]
#3I thought his method of multiplexing the single channel was very smart. I guess it's more common on 2 channel or high end 4 channel scopes to have a dedicated trigger input, which I've checked this one doesn't have. That said, there're digital inputs that could've been used. Presumably from whatever was controlling the laser.
Re: A laser pointer at 2B FPS [video]
#4Techniques like this are/were used to film nuclear explosions (but with a single explosion).
Re: A laser pointer at 2B FPS [video]
#5Techniques like this are/were used to film nuclear explosions (but with a single explosion).
Scanning a single pixel over an image? How does that work with an explosion? The laser pointer is reproducible
Re: A laser pointer at 2B FPS [video]
#6Ah, two billion. The first several times I saw this it looked like "twenty eight", which didn't seem terribly interesting.
Re: A laser pointer at 2B FPS [video]
#7Techniques like this are/were used to film nuclear explosions (but with a single explosion).
Who detonated 2073600 bombs?
Re: A laser pointer at 2B FPS [video]
#8As I understand it, this is sort of simulating what it would be like to capture this, by recreating the laser pulse and capturing different phases of it each time, then assembling them; so what is represented in the final composite is not a single pulse of the laser beam.
Would an upgraded version of this that was actually capable of capturing the progress of a single laser pulse through the smoke be a way of getting around the one-way speed of light limitation [0]? It seems like if you could measure the pulse's propagation in one direction, and the other (as measured by when it scatters of the smoke at various positions in both directions), this seems like it would get around it?
But it's been a while since I read an explanation for why we have the one-way limitation in the first place, so I could be forgetting something.
Re: A laser pointer at 2B FPS [video]
#9Techniques like this are/were used to film nuclear explosions (but with a single explosion).
Scanning a single pixel over an image? How does that work with an explosion? The laser pointer is reproducible
Re: A laser pointer at 2B FPS [video]
#10He did a good job on his setup, but I have to think that adding a spinning mirror would have made everything much faster and easier.
He could then capture an entire line quite quickly, and would only need a 1 dimensional janky mirror setup to handle the other axis. And his resolution in the rotating axis is limited only by how quickly he can pulse the laser.
Of course, his janky mirror setup could have been 2 off-the-shelf galvos, but I guess that isn't as much "content".