Optical device for augmented reality having an expanded field of view and eyebox

An optical device for augmented reality having an expanded field of view and eyebox, the optical device comprising:

• an image output unit including a display unit configured to output virtual image light;
• an optical means configured to allow the virtual image light, output from the image output unit, to propagate through an inside thereof, and to transmit real object image light therethrough toward a user's pupil;
• an auxiliary optical element arranged in the optical means, and configured to convert the virtual image light, output from the image output unit, according to preset requirements and to output the virtual image light so that it is transferred to a plurality of optical elements;
• and
• the plurality of optical elements arranged in the optical means to transfer the virtual image light, transferred from the auxiliary optical element, toward the user's pupil;
• wherein each of the plurality of optical elements includes a first reflective surface and a second reflective surface, which are a pair of reflective surfaces arranged to be inclined with respect to each other;
• and
• wherein the first and second reflective surfaces are arranged at an inclination angle such that each of the first and second reflective surfaces transfers virtual image light, transferred from the image output unit, to a remaining reflective surface and transfers virtual image light, transferred from the remaining reflective surface, toward the user's pupil.