Patents by Inventor Kee-hoon HONG
Kee-hoon HONG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12266390Abstract: The present disclosure relates to a hologram recording system that has an optical structure capable of replacing a polarization image sensor, thereby acquiring high-resolution holograms in real time by utilizing a high-resolution general image sensor. The hologram recording system for acquiring an interference pattern formed by self-interference of incident light from a target object is disclosed. The hologram recording system comprises a polarizer array including a plurality of polarizers, an image sensor including a plurality of pixels and an imaging optics disposed between the polarizer array and the image sensor. The imaging optics optically corresponds each of the plurality of polarizers to each of the plurality of pixels.Type: GrantFiled: November 28, 2023Date of Patent: April 1, 2025Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Ki Hong Choi, Kee Hoon Hong
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Patent number: 12181346Abstract: Disclosed herein an apparatus and method for estimating a phase retarder and method of manufacturing the phase retarder using the same. The apparatus includes: a polarization element configured to output an incident light as a linear polarization and to make the linear polarization incident onto a phase retarder to be tested; a polarization image acquisition module equipped with a plurality of polarized pixels receiving an emitting light that is output from the phase retarder, on which the linear polarization is incident, and configured to obtain a polarization image based on the emitting light that is modulated in the polarized pixels; and a processor configured to evaluate quality of the phase retarder based on uniformity of a brightness value between polarized pixels of the polarization image. The polarized pixels modulate the emitting light based on a plurality of transmission angles and detects the modulated emitting light.Type: GrantFiled: September 6, 2022Date of Patent: December 31, 2024Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Ki Hong Choi, Joong Ki Park, Kee Hoon Hong
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Publication number: 20240185886Abstract: The present disclosure relates to a hologram recording system that has an optical structure capable of replacing a polarization image sensor, thereby acquiring high-resolution holograms in real time by utilizing a high-resolution general image sensor. The hologram recording system for acquiring an interference pattern formed by self-interference of incident light from a target object is disclosed. The hologram recording system comprises a polarizer array including a plurality of polarizers, an image sensor including a plurality of pixels and an imaging optics disposed between the polarizer array and the image sensor. The imaging optics optically corresponds each of the plurality of polarizers to each of the plurality of pixels.Type: ApplicationFiled: November 28, 2023Publication date: June 6, 2024Inventors: Ki Hong CHOI, Kee Hoon HONG
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Publication number: 20240069491Abstract: A hologram acquisition apparatus and a hologram acquisition system are disclosed. A hologram acquisition apparatus includes a beam splitter configured to split light emitted from an object into a first beam and a second beam, a first reflective optical element configured to receive and emit the first beam to the beam splitter, and a second reflective optical element configured to receive and emit the second beam to the beam splitter and formed as an annular spherical array having discontinuous surfaces, wherein the second reflective optical element has a plurality of segment regions that are concentric and divided to have the discontinuous surfaces and, the plurality of segment regions are formed to have the same focal point.Type: ApplicationFiled: July 11, 2023Publication date: February 29, 2024Applicant: Electronics and Telecommunications Research InstituteInventors: Kee Hoon HONG, Ki Hong CHOI
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Patent number: 11880164Abstract: Disclosed herein a module controlling viewing window, a device for hologram display and a method for displaying hologram. The module controlling viewing window includes: 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 the viewing window forming unit and expands a viewing angle of the viewing window.Type: GrantFiled: December 9, 2021Date of Patent: January 23, 2024Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventor: Kee Hoon Hong
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Publication number: 20230116262Abstract: Disclosed herein an apparatus and method for estimating a phase retarder and method of manufacturing the phase retarder using the same. The apparatus includes: a polarization element configured to output an incident light as a linear polarization and to make the linear polarization incident onto a phase retarder to be tested; a polarization image acquisition module equipped with a plurality of polarized pixels receiving an emitting light that is output from the phase retarder, on which the linear polarization is incident, and configured to obtain a polarization image based on the emitting light that is modulated in the polarized pixels; and a processor configured to evaluate quality of the phase retarder based on uniformity of a brightness value between polarized pixels of the polarization image. The polarized pixels modulate the emitting light based on a plurality of transmission angles and detects the modulated emitting light.Type: ApplicationFiled: September 6, 2022Publication date: April 13, 2023Inventors: Ki Hong CHOI, Joong Ki PARK, Kee Hoon HONG
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Publication number: 20220397860Abstract: Disclosed herein a device acquiring holography and system including the same. The device includes: a beam splitter module splitting a light emitted from an object into a first beam and a second beam which have polarizations in different states; and an optical control module equipped with a first reflective optical element, which is disposed at one side of the beam splitter module and receives and emits the first beam to the beam splitter module, and a second reflective optical element which is placed at the other side of the beam splitter module, receives the second beam and emits the second beam to the beam splitter module so as to have differences of optical path and wavefront from the first beam. The beam splitter module, the first reflective optical element and the second reflective optical element are monolithically installed by being fixed to each other.Type: ApplicationFiled: June 10, 2022Publication date: December 15, 2022Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Kee Hoon HONG, Ki Hong CHOI
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Publication number: 20220283541Abstract: A holographic camera system includes an imaging lens, a polarizer configured to circularly polarize light incident from the imaging lens, a geometric phase lens with a phase delay of ?/4, and an image sensor configured to replicate an interference pattern through self-interference of light output from the geometric phase.Type: ApplicationFiled: March 4, 2022Publication date: September 8, 2022Inventors: Hak-Rin Kim, Tae-Hyun Lee, Ki Hong Choi, Kee Hoon Hong, Joong Ki Park
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Publication number: 20220260953Abstract: Disclosed herein an apparatus for generating hologram and a method for generating hologram using the same. The apparatus includes: a geometric phase modulator disposed to enable incident light from a target object to pass through and configured to modulate the incident light to a plurality of circular polarizations; an image sensor configured to receive the plurality of circular polarizations and to acquire an interference fringe generated by the plurality of circular polarizations as an image; and a polarization selective element equipped with a liquid crystal element, which controls an output polarization angle of the incident light according to an output polarization signal, and configured to sequentially output the incident light at output polarization angles different from each other.Type: ApplicationFiled: February 17, 2022Publication date: August 18, 2022Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Kyungpook National University Industry-Academic Cooperation FoundationInventors: Ki Hong CHOI, Joong Ki PARK, Kee Hoon HONG, Hak-Rin KIM, Su-Won LEE, Tae-Hyun LEE
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Publication number: 20220214646Abstract: Disclosed herein a module controlling viewing window, a device for hologram display and a method for displaying hologram. The module controlling viewing window includes: 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 the viewing window forming unit and expands a viewing angle of the viewing window.Type: ApplicationFiled: December 9, 2021Publication date: July 7, 2022Inventor: Kee Hoon HONG
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Publication number: 20210319533Abstract: The present disclosure relates to an apparatus, method and system for generating a foveated image. According to the present disclosure, an apparatus for generating a foveated image, the apparatus may comprise a communicator configured to transmit and receive a signal and a processor configured to control the communicator, wherein the processor distinguishes objects comprised in a hologram, which is generated for a front field of view by using input light, selects an object to be targeted among the distinguished objects, and generates a foveated image by using depth information of the targeted object.Type: ApplicationFiled: April 7, 2021Publication date: October 14, 2021Applicant: Electronics and Telecommunications Research InstituteInventors: Ki Hong CHOI, Joong Ki PARK, Han Ju YEOM, Kee Hoon HONG
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Publication number: 20210314546Abstract: The present disclosure relates to an apparatus, method and system for generating a three-dimensional image using a coded phase mask. According to the present disclosure, an apparatus for generating a three-dimensional image, the apparatus may comprise a communicator for transmitting and receiving a signal and a processor for controlling the communicator, wherein the processor synthesizes complex data for an object based on an image, which is obtained by shooting an object, and generates a three-dimensional image of the object based on the complex data for the object and a point spread function (PSF) image for a point light source.Type: ApplicationFiled: April 2, 2021Publication date: October 7, 2021Applicant: Electronics and Telecommunications Research InstituteInventors: Ki Hong CHOI, Joong Ki PARK, Kee Hoon HONG
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Patent number: 9651918Abstract: Provided is a holographic recording method in which an interference fringe between a reference beam and a signal beam, modulated according to information regarding a plurality of hologram pixels, is recorded on a holographic recording medium, the holographic recording method including multiplexing-recording the interference fringe of the plurality of hologram pixels such that at least a part of the interference fringe recorded of neighboring hologram pixels of the plurality of hologram pixels is overlapped.Type: GrantFiled: September 19, 2013Date of Patent: May 16, 2017Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Kyoung-seok Pyun, Byoung-ho Lee, Sun-il Kim, Chil-sung Choi, Soon-gi Park, Jung-kwuen An, Kee-hoon Hong, Ji-woon Yeom, Jong-hyun Kim
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Publication number: 20140285863Abstract: Provided is a holographic recording method in which an interference fringe between a reference beam and a signal beam, modulated according to information regarding a plurality of hologram pixels, is recorded on a holographic recording medium, the holographic recording method including multiplexing-recording the interference fringe of the plurality of hologram pixels such that at least a part of the interference fringe recorded of neighboring hologram pixels of the plurality of hologram pixels is overlapped.Type: ApplicationFiled: September 19, 2013Publication date: September 25, 2014Applicants: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, SAMSUNG ELECTRONICS CO., LTD.Inventors: Kyoung-seok PYUN, Byoung-ho LEE, Sun-il KIM, Chil-sung CHOI, Soon-gi PARK, Jung-kwuen AN, Kee-hoon HONG, Ji-woon YEOM, Jong-hyun KIM