Patent ID: 11880164
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A method for displaying hologram comprising:
modulating, by a spatial light modulator including a plurality of pixels, an input light into a diffracted light;
emitting, by a lens unit, the diffracted light; and
providing, by a viewing window control module, the emitted diffracted light to a user's viewing region,
wherein the providing to the viewing region comprises:
receiving the emitted diffracted light, by a viewing window forming unit having a first reflective optical system, and forming a viewing window on the viewing region; and
expanding, by a viewing angle expanding unit having a second reflective optical system arranged in one direction on and integrated with the viewing window forming unit, a viewing angle of the viewing window,
wherein the viewing angle expanding unit has a plurality of second reflective optical systems that are sequentially arranged at a predetermined pitch in the one direction on a light receiving surface of the viewing window forming unit,
wherein the second reflective optical system has an arrangement pitch based on a pixel pitch of the spatial light modulator.