公开(公告)号：US11914145B2

公开(公告)日：2024-02-27

申请号：US17285851

申请日：2020-12-10

Applicant: KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION

Inventor： Seung Hyun Lee ,  Lee Hwan Hwang ,  Jae Hyun Lee ,  Sung Jae Ha ,  Soon Chul Kwon ,  Kwang Pyo Hong

IPC: G03H1/22 ,  G02B27/01 ,  G02B5/32

CPC classification number: G02B27/0103 ,  G02B5/32 ,  G03H1/2205 ,  G03H2001/2213 ,  G03H2223/14

Abstract: Disclosed in the present invention is a floating hologram system. The floating hologram system includes a diffuser configured to form a projection image using light beams transmitted from an image transmitter and diffuse the formed image, and a holographic optical element on which the image diffused from the diffuser is incident and which generates a virtual image floating at a position a predetermined distance therefrom and has a convex lens characteristic. A distance between the diffuser and the holographic optical element is determined based on a focal length of the holographic optical element and a distance from the holographic optical element to the virtual image.