As an intermediate runner the info is great.
Readit Newsanonimonkey commented on What a beginner should know about running blog.bovi.hu/?post_id=9... · Posted by u/mypreciousun
I dunno if lidar would have helped here much since it was so foggy (unless fog is transparent to IR or something?).
Radar would, but radar is also a bit crap - in particular angular resolution is very very poor.
Fog (small water droplets suspended in air) is transparent to light but it can reflect it if
the wavelength of light is smaller than the water droplet diameter. Since there are so many droplets it scatters light making lidar useless.
The usual diameter of fog droplets is in the micrometer range, but is highly variable.
So microwave/milimeterwave lidar could theoretically work.
anonimonkey commented on A tiny ultrabright laser that can melt steel spectrum.ieee.org/pcsel... · Posted by u/rbanffy
Can you use this for 3d printin?
Like in an array of lasers where every laser is a pixel and you get 3d by shifting a powder layer.
Could this architecture be faster then current 3d printers?