Patent ID: 8616751

Claim:
A light guide for interfacing a light source having a light emitting surface having a first shape and a light receiver having a light receiving surface of a second shape, the light guide comprising: a light receiving end having a first shape of substantially the same size as the first shape of the light emitting surface; a light emitting end having a second shape of substantially the same size as the second shape of the light receiving surface; and a free form body connecting the light emitting end and the light receiving end having a shape transitioning between the first shape of the light receiving end and the second shape of the light emitting end, wherein the first shape of the light receiving end is a different shape than the second shape of the light emitting end, and wherein the free form body is configured so that when light enters the light receiving end from the light source, the light bounces between surfaces of the free form body due to total internal reflection and exits the light emitting end.