LED Device for Wide Beam Generation

An improvement in an apparatus for providing an optical transfer function between a predetermined illuminated surface pattern and a predetermined energy distribution pattern of a light source comprising an undercut surface of a lens having a shape defined by the optical transfer function which shape is derived by generating an energy distribution pattern using the predetermined energy distribution pattern of the light source and then generating a projection of the energy distribution pattern onto the illuminated surface from the energy distribution pattern, which projection acceptably matches the predetermined illuminated surface pattern.

An apparatus comprising:

• a light source having a near field and at least a portion of light from the light source being transmitted into a peripheral forward solid angle;
• and
• a lens having an undercut surface and a lobed surface which includes at least one lobe contiguous with the lens, the undercut surface positioned to intercept light in the near field of the light source in the peripheral forward solid angle of light from the light source to direct the intercepted light.