Nonimaging optics (also called anidolic optics) is the branch of optics concerned with the optimal transfer of light radiation between a source and a target. Unlike traditional imaging optics, the techniques involved do not attempt to form an image of the source; instead an optimized optical system for optical radiative transfer from a source to a target is desired.
Read more about Nonimaging Optics: Applications, Theory, Kohler Integration, Compound Parabolic Concentrator, History