How to project a shape through laser pointer/projector


I want to project this specific shape of rectangular with laser. Something similar to what Laser keyboard does, except I don't need all that complexity. Or it's something similar to laser pointer heads with different design patterns. 

Please let me know if you have any suggestion. I would like to do this on my own as much as I can.

Thank You!

caitlinsdad2 years ago

You can read up on making a diffraction grating for your design. Good luck.