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A laser pointer at 2B FPS [video]

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615 points thunderbong | 1 comments | 19 Oct 25 06:42 UTC | HN request time: 0.234s | source
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avidiax ◴[20 Oct 25 22:41 UTC] No.45650342[source]▶
He 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".

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1. rcxdude ◴[21 Oct 25 12:45 UTC] No.45655088[source]▶
Yeah, spinning at a constant rate with an encoder for triggering would probably be a bit more consistent. But potentially more of a mechanical headache. And he does need a pretty big mirror due to being limited by the amount of light he can focus on the sensor, I'm not sure that there are galvos available with such a large area (especially for a reasonable price).