title: Freeform aplanatic systems as a limiting case of SMS.
abstract: We present here aplanatic systems in 3D geometry as a limiting case of a SMS 3D design. We extend the basic formulations governing rotationally symmetric aplanatic systems to freeform aplanatic systems and provide a formal proof that a SMS 3D design in the limiting case of 3 coincident points leads to a freeform aplanatic system.
authors.forename: Juan C
authors.initials: JC
authors.lastname: Miñano
authors.forename: Pablo
authors.initials: P
authors.lastname: Benítez
authors.forename: Bharathwaj
authors.initials: B
authors.lastname: Narasimhan