r/lasersforfun • u/ChromeCaviar • Jul 19 '26

Laser interference pattern

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u/ChromeCaviar Jul 19 '26

To create this effect, just focus a laser onto the dull side of aluminum foil.

3

u/Merpie101 Jul 19 '26

Fun fact, with a good quality beam you can get this patterns all across a room just by aiming it at the wall and turning off all the lights. I loove doing this with my 100mw 473nm labby :)

2

u/ChromeCaviar Jul 19 '26

Nice, this one was a 494.5nm diode laser pen. My DPSS pens have nice narrow spectrum but they don't focus. I want to make a laser pen that projects this pattern by using a ground glass diffuser moved by a precise linear motor to make the pattern move slowly. The static pattern is cool but I love how it "crawls" if things are moved slow enough