styropyro
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giant green laser pointer
🕑 Added 2022-11-17 22:48:03 +0000 UTCi've been waiting for years for huge green laser diodes arrays to become available, and I finally got one in the middle of my move to my new lab. I ended up using it to build a giant version of the classic cheap green laser pointer. Output power is nearly 30W which makes it 6000 times more powerful than a 5mW laser pointer. The circuit driving it is the most cursed thing I've ever made, but at least it works.
Unfortunately these green laser diodes are not very efficient, and in fact this thing uses roughly the same input power as my 100W blue handheld laser to make less than half of the total output power of light. This issue applies to all direct green LEDs and laser diodes and is actually an unsolved in engineering. That being said, the luminous efficacy of green light (aka how sensitive our eyes are to green) is so much higher than blue that this build ends up being my brightest portable laser build yet. Pretty cool right? :D
Comments
stella
Those diffraction or lens or whatever effects look sick
DrogaMleczna
Comically large laser pointer
David Noireaut
That picture is CRAZY!!!
Sean Daggett
The amount of light reflecting back onto the leaves is nuts! The picture almost looks photoshopped, like a little hand holding a pen sized laser. I can't wait for more, just keep it out of the skies!
styropyro
yes! funny you say that because I will be keeping a close watch on the weather forecast models for an opportunity to film in snow at night. with my 100W blue laser, I waited for weeks for the right opportunity for snow, keeping a close eye on the forecasts. once a good burst of heavy snow looked likely one night, I set everything up before it starting falling, and then got some awesome shots when the snow finally started falling https://twitter.com/styropyro_/status/1228461952432824321/photo/1
David Noireaut
Does it snow where you live? During a snow storm it would be so crazy.
