That is correct, the measurements are set as a maximum. Since we have limited space available. I need to know the curvature because I am making the lens myself. Using a CNC laser cutter, and the material isn't glass but PMMA which has a different n-index.
As an electrical engineer, I am an amateur on optics, but I really could use some help.
I am making a lens of PMMA, 2D. To 'convert' a rotary movement into a sweep.
The lens needs to be 120mm long, with its focus at a max distance of 80mm
the light traveling out of the lens needs to be parallel...