Systems and methods to minimize double-bounce in waveguides

A method comprising:

• at a laser projection system comprising a plurality of laser diodes and a beam combiner having a plurality of reflective surfaces disposed therein, wherein each of the plurality of reflective surfaces is positioned to receive a light beam projected from one of the plurality of laser diodes:
• projecting a plurality of light beams from the plurality of laser diodes;
• and
• generating a combined light beam by reflecting the plurality of light beams from the plurality of reflective surfaces such that an edge of each of the plurality of light beams is aligned on a tangent.

A head-mounted display (HMD) comprising:

• a laser projection system comprising:
• an optical engine comprising a plurality of laser diodes configured to emit a plurality of light beams;
• and
• a beam combiner having a plurality of reflective surfaces configured to generate a combined light beam by reflecting the plurality of light beams from the plurality of reflective surfaces such that an edge of each of the plurality of light beams is aligned on a tangent;
• and
• a waveguide having an incoupler to receive the combined light beam, wherein an edge of the incoupler corresponds to the tangent on which the edges of the plurality of light beams are aligned.