The lens being a simple lens adapted to cooperate with a point-like

Official title: {the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses}

F21V5/048 (The lens being a simple lens adapted to cooperate with a point-like) appears on 363 US grants and 414 published applications in this corpus.