Lens for Improved Color Mixing and Beam Control of an LED Light Source

A lens for receiving light from an LED, comprising:

• a unibody compound parabolic concentrator (CPC) lens rotated about a central axis that includes:
• a concave spherical exit surface, rotated about the central axis;
• and
• a tapered cylindrical light entrance surface rotated about the central axis, the light entrance surface having a peripheral sidewall, a first, open end having a first radius, and a second, planar, closed end having a second radius less than the first radius;
• wherein the peripheral sidewall includes a diffusion surface;
• and
• wherein the planar, closed, end of the entrance surface includes a diffusion surface.

A lighting apparatus, comprising:

• a unibody compound parabolic concentrator (CPC) lens rotated about a central axis that includes:
• a concave spherical exit surface, rotated about the central axis;
• and
• a tapered cylindrical light entrance surface rotated about the central axis, the light entrance surface having a peripheral sidewall, a first, open end having a first radius, and a second, planar, closed end having a second radius less than the first radius;
• wherein the peripheral sidewall includes a diffusion surface;
• and
• wherein the planar, closed, end of the entrance surface includes a diffusion surface;
• and
• one or more light-emitting diode emitters disposed at a focal point of the CPC lens.