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How to project a shape through laser pointer/projector

Hello, 

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.

https://www.physicsforums.com/threads/physics-of-laser-pointer-attachments-stars-butterflies-etc.492030/