any laser diode will do that if you mount lt on a servo to rotate it 90 degrees, parallel close to the floor. Lasers have a narrow beamwidth so they need rotated or using some lens for dispersal or rotation, or maybe even a rotating prism.
Thanks alot for the info. For you to better understand my intentions, im trying to replicate the laser formation thats on a dyson gen5 detect so i can make my own. Not spending 1000 bucks on a stick vacuum lol
You’ll want a green line laser instead of a point one. Look for something around 532 nm with a wide fan angle (like 90°), those are usually used for leveling and should show dust on the floor nicely. Just keep an eye on the power so it’s safe indoors.
