Augmented reality device including flat combiner and electronic device including the same

An augmented reality device comprising:

• a light source;
• a display device comprising a plurality of pixels and configured to generate a first image based on light incident from the light source;
• and
• an optical combiner comprising a plurality of optical combining units each including a first area and a second area, wherein the first area reflects a plurality of beams constituting the first image at different reflection angles according to wavelengths and incident angles and transfers the reflected plurality of beams to a predetermined viewer position, and the second area transmits a beam of a second image received from outside and transfers the beam of the second image to the predetermined viewer position,
• wherein the first area comprises a plurality of phase modulators configured to reflect different wavelengths of the plurality of beams,
• wherein the plurality of phase modulators comprise a plurality of nanostructures,
• wherein the second area comprises an opening through which the beam of the second image is transmitted, and
• wherein, the first area of the optical combiner is configured to receive the plurality of beams at different incident angles, and reflect the plurality of beams at different reflection angles to cause the plurality of beams to travel in parallel, and
• wherein the first area which receives the plurality of beams at the different incident angles, and reflects the plurality of beams at the different reflection angles, is a part of an integral structure, and faces the light source at a same angle.