Yes I am trying to make an image of the sun on the ground but i am trying to make that image as small as possible. A concave mirror cannot do the job this is because at one point of the mirror the light comes in at a variaty of angles.
When designing a space based energy satellite for our project, we ran across the option to just use a mirror to reflect extra light to a photovoltaic ground station on earth. The main difficulty of this option is that due to the fact that the light coming from the south pole of the sun hits the...