Waveguide geometry for improved display performance

An optical waveguide for combining light from real imagery with light from a light engine, said waveguide comprising:

• a. an optically transparent substrate having top and bottom surfaces;
• and
• b. a plurality of optical elements optically coupled with the substrate;
• the plurality of optical elements comprising:
• i. a first incoupling optical element configured to incouple a first light beam into the substrate such that the first light beam propagates through the substrate along a first primary beam path;
• ii. a first outcoupling optical element configured to outcouple the first light beam from the substrate;
• iii. a first redirection optical element configured to redirect the first light beam such that it propagates through the substrate toward the first outcoupling optical element along a first secondary beam path;
• iv. a second incoupling optical element configured to incouple a second light beam into the substrate such that the second light beam propagates through the substrate along a second primary beam path;
• v. a second outcoupling optical element configured to outcouple the second light beam from the substrate;
• vi. a second redirection optical element configured to redirect the second light beam such that it propagates through the substrate toward the second outcoupling optical element along a second secondary beam path;
• vii. a third incoupling optical element configured to incouple a third light beam into the substrate such that the third light beam propagates through the substrate along a third primary beam path;
• viii. a third outcoupling optical element configured to outcouple the third light beam from the substrate;
• ix. a third redirection optical element configured to redirect the third light beam such that it propagates through the substrate toward the third outcoupling optical element along a third secondary beam path;
• wherein the first light beam is red, the second light beam is green, and the third light beam is blue,
• wherein the first, second, and third incoupling optical elements are overlapping, the first, second, and third outcoupling optical elements are overlapping, the first and third redirection optical elements are overlapping, and the second redirection optical element does not overlap with the first and third redirection optical elements, and
• wherein the first and third primary beam paths are both different from the second primary beam path, and the first and third secondary beam paths are both different from the second secondary beam path.