Diode -> Collimator -> Focus lens |-------------------
or
Diode -> Collimator/Focus Lens |-------------------
How many lens need for focus and create a little dot point, I understand that moving the lens Back and forth, I can change the distance of the final surface with the smaller point can be possible.
or
Diode -> Collimator/Focus Lens |-------------------
How many lens need for focus and create a little dot point, I understand that moving the lens Back and forth, I can change the distance of the final surface with the smaller point can be possible.