公开(公告)号：US20190204784A1

公开(公告)日：2019-07-04

申请号：US16224542

申请日：2018-12-18

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Keehoon HONG ,  Kwan-Jung OH ,  Hyon-Gon CHOO ,  Yongjun LIM

IPC分类号： G03H1/26

CPC分类号： G03H1/2645 ,  G03H2223/15 ,  G03H2223/50 ,  G03H2225/12

摘要： In the present invention, by providing an apparatus for displaying a hologram including: a beam source configured to output a plurality of beams, a spatial light modulator configured to include a plurality of SLM (spatial light modulator) regions, display a hologram, and diffract the plurality of beams; a plurality of front lenses each corresponding to the plurality of SLM regions, and configured to refract the plurality of beams diffracted from each of the plurality of SLM regions; a plurality of filters each corresponding to the plurality of SLM regions, and configured to filter a part of the plurality of refracted beams; and a plurality of back lenses each corresponding to the plurality of SLM regions, and configured to display an interference image corresponding to the hologram using the filtered part beam, the beam path of the hologram displaying apparatus can be drastically reduced, and an entire size of the hologram displaying apparatus can be reduced, so that it is possible to down-size the digital hologram display system.

公开(公告)号：US20220397859A1

公开(公告)日：2022-12-15

申请号：US17591453

申请日：2022-02-02

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Kihong CHOI ,  Keehoon HONG ,  Joong-Ki PARK

IPC分类号： G03H1/04

摘要： The holographic lens system includes a geometric phase lens located on plane of an aperture, a front lens and a rear lens respectively located at the front and behind of the aperture, a polarizer located between the geometric phase lens and the front lens, and an image sensor that is located behind the rear lens and acquires an interference fringe generated by the geometric phase lens.

公开(公告)号：US20210149339A1

公开(公告)日：2021-05-20

申请号：US16950481

申请日：2020-11-17

申请人： Electronics and Telecommunications Research Institute

发明人： Han-Ju YEOM ,  Sanghoon CHEON ,  Joongki PARK ,  Kwan-Jung OH ,  Keehoon HONG

IPC分类号： G03H1/08 ,  G03H1/16 ,  G03H1/22

摘要： An apparatus for synthesizing ultra-high resolution computer generated holograms based on mesh propagates a plurality of 3D meshes constituting the 3D model to a hologram plane, divides an entire angular spectrum area corresponding to a set maximum diffraction angle into a plurality of partial angular spectral areas, sequentially calculates and accumulates angular spectrums of the plurality of 3D meshes for each of the plurality of partial angular spectrum areas, and generates holograms for the 3D model from the angular spectrums accumulated for each of the plurality of partial angular spectrum areas.

公开(公告)号：US20180267467A1

公开(公告)日：2018-09-20

申请号：US15923813

申请日：2018-03-16

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Yongjun LIM ,  Keehoon HONG

IPC分类号： G03H1/22 ,  G03H1/00 ,  G03H1/08 ,  G03H1/02

CPC分类号： G03H1/2205 ,  G03H1/0005 ,  G03H1/0248 ,  G03H1/08 ,  G03H1/2294 ,  G03H2001/0088 ,  G03H2001/2207 ,  G03H2001/221 ,  G03H2001/2239 ,  G03H2222/36 ,  G03H2223/24

摘要： A holographic display apparatus is provided. The holographic display apparatus includes a spatial light modulator configured to diffract light emitted from an incident light source with a shape corresponding to a computer generated hologram (CGH) pattern to generate an image signal, a filtering optical system configured to filter the image signal to select a first signal component among signal components included in the image signal, a first formation optical system configured to form a focus plane with a smaller size than the first image plane on a surface of a mirror via focus on the first image plane based on the first signal component, and a focus scanner configured to form a beam in a direction of 360 degrees based on a tilting angle of the mirror and rotation of the mirror.

公开(公告)号：US20210141339A1

公开(公告)日：2021-05-13

申请号：US17089977

申请日：2020-11-05

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Sang Hoon CHEON ,  HANJU YEOM ,  Joong-Ki PARK ,  Kwan-Jung OH ,  Keehoon HONG

IPC分类号： G03H1/26

摘要： Provided is a hologram generation method including receiving a distribution of a polygon and generating an angular spectrum based on the distribution of the polygon, determining whether a rotation angle of the polygon is included in a first section determined based on a maximum diffraction angle of a spatial light modulator, and recording the angular spectrum if it is determined that the rotation angle is included in the first section.

公开(公告)号：US20190179263A1

公开(公告)日：2019-06-13

申请号：US16216518

申请日：2018-12-11

申请人： Electronics and Telecommunications Research Institute

发明人： Yongjun LIM ,  Hayan KIM ,  Keehoon HONG

IPC分类号： G03H1/22 ,  G03H1/00 ,  G03H1/24

摘要： According to the present invention, by providing a hologram displaying apparatus including a light source configured to output a plurality of lights of different wavelengths in a first direction, a generator configured to generate a plurality of color holograms of different wavelengths using the plurality of light, and output the plurality of color holograms in the first direction, a filter configured to filter an effective hologram which is an element of an effective band of the plurality of color holograms in the first direction, and a display configured to transmit the effective hologram in the first direction and display the effective hologram in space in the first direction, it is possible to effectively filter an effective band of a certain diffraction order of each color hologram forming a composing hologram.

公开(公告)号：US20180292787A1

公开(公告)日：2018-10-11

申请号：US15867569

申请日：2018-01-10

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Yongjun LIM ,  Keehoon HONG

IPC分类号： G03H1/30

摘要： Disclosed is a digital color holographic display device using tiling, including: a plurality of digital color hologram generating units generating digital color holograms, respectively; and a tiling unit spatially arranging the digital color holograms of the plurality of digital color hologram generating units through an optical tiling method so as not to overlap with each other.

公开(公告)号：US20180196271A1

公开(公告)日：2018-07-12

申请号：US15825029

申请日：2017-11-28

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Keehoon HONG ,  Yongjun LIM

IPC分类号： G02B27/10 ,  G02B6/28 ,  G02B27/09

CPC分类号： G02B27/1026 ,  G02B6/28 ,  G02B27/0944 ,  G02B27/095 ,  G02B27/0977 ,  G02B27/1086 ,  G03H2001/2226 ,  G03H2001/2271 ,  H04N9/3108 ,  H04N9/3152 ,  H04N9/3161

摘要： Disclosed is a light modulation system and a light source illumination device thereof. The light modulation system may include: a first diffractive optical element for expanding optical beams from a light source; an optical waveguide for performing total internal reflection of the expanded optical beams and transmitting resultant optical beams; a second diffractive optical element for modifying an angle of the transmitted optical beams; and a digital micro-mirror device for modulating the angle-modified optical beams.