Lens for reforming light-emitting diode radiation

A lens for reforming radiation from a light-emitting diode comprising:

• a first convex surface for admitting radiation taking a path from the light-emitting diode that is close to the axis of the diode;
• a cylindrical surface for admitting radiation taking a path from the light-emitting diode that makes a wider angle with the axis of the diode;
• a conical surface disposed to receive and totally internally reflect the radiation admitted by said convex surface and re-radiate it at an angle substantially normal to the axis of the diode;
• and
• a curved surface for receiving and re-radiating at an angle substantially normal to the axis of the diode the radiation admitted by the cylindrical surface.

A radiation reforming lens having four surfaces on a common axis collinear with the axis of a light emitting diode, comprising:

• a first light admitting surface having central and peripheral zones, said first surface being curved, said central zone being disposed close to said axis;
• a second light admitting surface, said second surface being curved;
• a third surface, said third surface being a light exiting surface disposed to receive radiation from said first light admitting surface;
• a fourth surface, said fourth surface being a light exiting surface disposed to receive radiation from said second light admitting surface,
• wherein said light exiting from said third and fourth surface is substantially normal to said axis.