| CPC G02B 27/0172 (2013.01) [G02B 2027/0174 (2013.01)] | 21 Claims |
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1. A light combiner for combining a first light provided from a light source with a second light containing an image of an exterior environment and providing the combined light to a user, the light combiner comprising:
a transmissive optical device comprising a first surface on which the first light is incident and a second surface facing the first surface, the transmissive optical device branching the first light in a plurality of directions to pass through the second surface; and
a holographic optical device provided on a side of the transmissive optical device facing the second surface and spaced apart from the transmissive optical device,
wherein the holographic optical device diffracts a plurality of light rays that have been branched in the plurality of directions and transmitted by the transmissive optical device, to be respectively focused at a plurality of focal points different from each other and corresponding to the plurality of directions, and
wherein the holographic optical device transmits the second light therethrough so as to travel toward the plurality of focal points.
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