Optics is not my best subject. I know the basics of how light behaves as it go through a lens. I tried to understand further but got more confused as I get deeper into this subject.
My goal is to make a flashlight that shines into a spot as much as possible (but not so much so as to leave the focal point a dot). I'm looking for a 50% reduction in beam size. The candidate flashlight is already producing spot characteristics without any optics.
I was wondering if a combination of a Plano concave and a double convex lens arranged in a tube that extends out of the flashlight would do the trick. If not, what combination/lens would work?
I don't have a bunch of lenses to play around with but I'm planning to purchase the required optics for the final flashlight beam. Thanks!