/sci/ - Science & Math

>>5198035
I only just started reading up on the subject a few days ago. My classical optics is rusty, so I'm having a bit of a hard time with it myself, but I've gotten the gist of how the whole "parallel rays achieve distant focus and eliminate parallax" deal, and I've figured out a few simple configurations that produce collimated light. I'm just trying to figure out how to expand this to include more than a single point, since I can't quite grasp how to have a single collimator produce a 2d image (rather than just a point image) cast at infinity.

Illustration made for /k/ in the context of reflector gunsights, but perhaps it will be helpful on this board as well.