I believe you can do the same thing using a diffraction grating to separate a single laser beam into a grid of many beams. After the beams are reflected off of objects, the dots projected further away from the central beam represent objects further away.
Slashdot Mirror
I believe you can do the same thing using a diffraction grating to separate a single laser beam into a grid of many beams. After the beams are reflected off of objects, the dots projected further away from the central beam represent objects further away.