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

Claim 0:
1. A viewing window control module applied to a hologram display device, the viewing window control module comprising:
a viewing window forming unit having a first reflective optical system that receives an incident light and forms a viewing window in a user's viewing region; and
a viewing angle expanding unit having a second reflective optical system that is arranged in one direction on and integrated with the viewing window forming unit and expands 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 a spatial light modulator from which the incident light is output.