Patent ID: 8215814
Filing Date: 2012-07-10
Classification: F21K,F21V,F21W,F21Y,G02B

Abstract:
1. A solid state based illumination apparatus comprising: an LED die having a support and an LED axis of reference to generate a light beam around the LED axis of reference; an optical lens having a lens body and an optical cavity to receive the light beam generated by the LED, the optical cavity having a refractive surface for deflecting the light beam generated by the LED, the optical lens being separate from the LED die, the optical lens further comprising: a plurality of sub-lenses forming together the lens body, the sub-lenses including optical surfaces that reflect and refract portions of the light beam along sub-axes that are angled with respect to the LED axis of reference and where the sub-lenses include two identical dome shaped lenses, one dome shaped lens being the mirror image of the other with respect to a median plane that divides the optical lens into two halves to create two spot light patterns onto a remote target along two of the sub-axes and where a third sub-lens located adjacent said dome shaped lenses that is separated by an air gap from the dome shaped lenses creates a non-circular spot light pattern along another one of the sub-axes that is offset with respect to the two sub-axes of the dome shaped lenses to create a spot light pattern at the target that is adjacent the spot light patterns created by the dome shaped lenses and where the third sub-lens has a polygonal exit optical surface to generate the non-circular spot light pattern at the target to complement the two spot light patterns of the dome shaped lenses and create a composite polygonal illumination pattern at the target.