Patent ID: 9625638
Date: 2017-04-18
CPC Classifications: G02B

Claim:
1. An optical waveguide body, comprising: a first layer of optically transmissive material comprising a thickness defined by a first side and second side; a second layer of optically transmissive material comprising a third side and a fourth side opposite the third side, said third side in contact with the second side of the first layer; wherein the first layer has a first index of refraction and the second layer has a second index of refraction less than the first index of refraction and wherein the first and second indices of refraction are both greater than about 1.0; and a body of material extending into the first layer from the first side and comprising an index of refraction greater than the first index of refraction, wherein the second layer comprises a plurality of ridges and grooves on the fourth side, wherein each of the ridges comprises a first height, wherein the body of material comprises a second height that is larger than the first height.