Patents by Inventor Myung Yung Jeong
Myung Yung Jeong 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: 10088408Abstract: A method of measuring a friction coefficient of a surface of a specimen includes: obtaining surface information of the specimen by using an atomic force microscope (AFM); calculating data of a friction coefficient of the surface of the specimen by using the surface information of the specimen; and mapping the data of the friction coefficient of the specimen to an image. The method of measuring a friction coefficient of a surface of a specimen may prevent a probe part of an atomic force microscope from being worn out and secure high reliability of the friction coefficient value by correcting the atomic force microscope using a specimen to be actually measured and measuring a fiction coefficient at the same time.Type: GrantFiled: November 18, 2015Date of Patent: October 2, 2018Assignees: Hyundai Motor Company, Pusan National University Industry—University CooperationInventors: Jung Yeon Park, Woong Pyo Hong, Ji Youn Seo, Bo Kyung Kim, In Woong Lyo, Kwang Hoon Choi, Doo In Kim, Sung Mo Park, Myung Yung Jeong
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Publication number: 20160161396Abstract: A method of measuring a friction coefficient of a surface of a specimen includes: obtaining surface information of the specimen by using an atomic force microscope (AFM); calculating data of a friction coefficient of the surface of the specimen by using the surface information of the specimen; and mapping the data of the friction coefficient of the specimen to an image. The method of measuring a friction coefficient of a surface of a specimen may prevent a probe part of an atomic force microscope from being worn out and secure high reliability of the friction coefficient value by correcting the atomic force microscope using a specimen to be actually measured and measuring a fiction coefficient at the same time.Type: ApplicationFiled: November 18, 2015Publication date: June 9, 2016Inventors: Jung Yeon Park, Woong Pyo Hong, Ji Youn Seo, Bo Kyung Kim, In Woong Lyo, Kwang Hoon Choi, Doo In Kim, Sung Mo Park, Myung Yung Jeong
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Patent number: 9278490Abstract: The present invention relates to a method for manufacturing a two-dimensional polymer optical waveguide, which is used for manufacturing a two-dimensional optical waveguide through simplified processes using a single imprint original master.Type: GrantFiled: December 31, 2010Date of Patent: March 8, 2016Assignee: Pusan National University Industry-University Cooperation FoundationInventors: Myung Yung Jeong, Chang Seok Kim, Jin Hwa Ryu, Seung Hun Oh, Tae Ho Lee, Sang Uk Cho
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Patent number: 9233487Abstract: The disclosure relates to a method for manufacturing a photoaligning integrated large area metallic stamp, which includes the following steps: making a unit device PLC mold pattern, and molding a unit PLC device pattern through a multistep imprinting method using the PLC mold pattern; heat treating the unit PLC device pattern to minimize scattering loss due to surface roughness; making a groove pattern for supporting an optical fiber; making an integrated PDMS mold for a unit device by aligning the unit PLC device pattern and the groove pattern; and repeatedly replicating the integrated PDMS mold for a unit device to make a large area PDMS pattern, and making a large area stamp through electroforming using the large area PDMS pattern.Type: GrantFiled: February 22, 2011Date of Patent: January 12, 2016Assignee: Pusan National University Industry-University Cooperation FoundationInventors: Myung Yung Jeong, Seung Hun Oh, Jin Hwa Ryu, Sang Uk Cho, Tae Ho Lee
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Patent number: 9207063Abstract: Discloses is an optical coherence tomography (OCT) which uses an active mode-locking fiber laser in order to obtain image information of a sample. An imaging device in accordance with an embodiment comprises: a light source unit; a light separation unit; a reference unit; a diagnostic unit; a light coupling unit; and a signal processing unit. The imaging device removes a high-priced variable filter which has mechanical restrictions by directly delivering a modulation signal to a light source unit, so it can overcome mechanical restrictions and reduce costs.Type: GrantFiled: July 28, 2011Date of Patent: December 8, 2015Assignee: PUSAN NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATIONInventors: Chang Seok Kim, Myung Yung Jeong, Hwi Don Lee
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Publication number: 20130292052Abstract: The disclosure relates to a method for manufacturing a photoaligning integrated large area metallic stamp, which includes the following steps: making a unit device PLC mold pattern, and molding a unit PLC device pattern through a multistep imprinting method using the PLC mold pattern; heat treating the unit PLC device pattern to minimize scattering loss due to surface roughness; making a groove pattern for supporting an optical fiber; making an integrated PDMS mold for a unit device by aligning the unit PLC device pattern and the groove pattern; and repeatedly replicating the integrated PDMS mold for a unit device to make a large area PDMS pattern, and making a large area stamp through electroforming using the large area PDMS pattern.Type: ApplicationFiled: February 22, 2011Publication date: November 7, 2013Applicant: Pusan National University Industry-University Cooperation FoundationInventors: Myung Yung Jeong, Seung Hun Oh, Jin Hwa Ryu, Sang Uk Cho, Tae Ho Lee
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Publication number: 20130169972Abstract: Discloses is an optical coherence tomography (OCT) which uses an active mode-locking fiber laser in order to obtain image information of a sample. An imaging device in accordance with an embodiment comprises: a light source unit; a light separation unit; a reference unit; a diagnostic unit; a light coupling unit; and a signal processing unit. The imaging device removes a high-priced variable filter which has mechanical restrictions by directly delivering a modulation signal to a light source unit, so it can overcome mechanical restrictions and reduce costs.Type: ApplicationFiled: July 28, 2011Publication date: July 4, 2013Applicant: PUSAN NATIONAL UNIVERSITY INDUSTRY - UNIVERSITY COOPERATION FOUNDATIONInventors: Chang Seok Kim, Myung Yung Jeong, Hwi Don Lee
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Patent number: 8400640Abstract: Provided is an optical sensor interrogation system. The optical sensor interrogation system includes: a light source unit which matches round-trip time of light and wavelength tunable cycle time of light in a resonator and emits light; a sensing unit which receives an optical signal in which a center wavelength periodically tunes, from the light source unit and tunes the center wavelength of the optical signal according to physical changes applied from the outside; and a signal processing unit which receives the optical signal reflected from the sensing unit, detects data, and images the data. In particular, the light source unit includes a delaying unit which delays the round-trip time of light and a tunable filter which tunes the wavelength of light so as to match the round-trip time of light with the wavelength tunable cycle time of light.Type: GrantFiled: September 24, 2009Date of Patent: March 19, 2013Assignee: Pusan National University Industry-University Cooperation FoundationInventors: Chang-Seok Kim, Myung-Yung Jeong, Jae-Seok Park, Eun-Joo Jung, Hyung-Seok Lee
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Publication number: 20130062799Abstract: The present invention relates to a method for manufacturing a two-dimensional polymer optical waveguide, which is used for manufacturing a two-dimensional optical waveguide through simplified processes using a single imprint original master.Type: ApplicationFiled: December 31, 2010Publication date: March 14, 2013Applicant: PUSAN NATIONAL UNIVERISTY INDUSTRY-UNIVERSITY COOPInventors: Myung Yung Jeong, Chang Seok Kim, Jin Hwa Ryu, Seung Hun Oh, Tae Ho Lee, Sang Uk Cho
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Publication number: 20120307255Abstract: The present invention relates to an optical interferometer system with a damped vibration and noise effect property, in which a direct attachment of a partial reflecting film and an object to be measured may be used to damp a vibration and noise effect, thereby implementing a high-resolution optical shape measuring system. The optical interferometer system comprises an optical interferometer having a reference signal generating means attached to be spaced apart from an object to be measured by a predetermined distance, wherein the optical interferometer allows a reference signal and a measuring signal reflected from each boundary surface of the object to be measured to have an identical vibration and noise so that the vibrations and noises of the reference and measuring signals are canceled from each other; and a light receiving unit for measuring the object to be measured using an optical inference signal transmitted from the optical interferometer.Type: ApplicationFiled: November 3, 2011Publication date: December 6, 2012Inventors: Chang Seok KIM, Myung Yung Jeong, Jae Seok Park
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Publication number: 20100103426Abstract: Provided is an optical sensor interrogation system. The optical sensor interrogation system includes: a light source unit which matches round-trip time of light and wavelength tunable cycle time of light in a resonator and emits light; a sensing unit which receives an optical signal in which a center wavelength periodically tunes, from the light source unit and tunes the center wavelength of the optical signal according to physical changes applied from the outside; and a signal processing unit which receives the optical signal reflected from the sensing unit, detects data, and images the data. In particular, the light source unit includes a delaying unit which delays the round-trip time of light and a tunable filter which tunes the wavelength of light so as to match the round-trip time of light with the wavelength tunable cycle time of light.Type: ApplicationFiled: September 24, 2009Publication date: April 29, 2010Inventors: Chang-Seok Kim, Myung-Yung Jeong, Jae-Seok Park, Eun-Joo Jung, Hyung-Seok Lee
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Publication number: 20090091405Abstract: There are provided a resonator for use in a filter, which interprets and reduces intermodulation distortion by analyzing characteristics of current density occurring at resonance and linear and nonlinear characteristics of the filter, a method for manufacturing filters by using the resonator and a filter manufactured by the method. The resonator has a ratio of an inside diameter to an outside diameter belonging to a range which is larger than about 1:3 and smaller than or equal to about 1:3.75 and its length (H) is about ?/4, wherein ? is a wavelength of a plane wave provided to the resonator. By employing the method, it is possible to effectively design the filters through the use of a circuitry and structural approach with breaking from a conventional approach depending on local and minute processing steps when manufacturing the filters.Type: ApplicationFiled: October 23, 2008Publication date: April 9, 2009Applicant: Electronics and Telecommunications Research InstituteInventors: In Kui CHO, Jin Tae Kim, Myung Yung Jeong, Tae Goo Choy
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Patent number: 7167617Abstract: An integrated type optical coupling device capable of easily accurately performing an optical arrangement between a narrow-pitch multi-channel optical waveguide and an optical fiber array and a master used in fabricating the same are provided. By forming a fixing projection between the optical fibers, the dynamic stability of the optical fiber array is increased and the optical arrangement between the optical waveguide and the optical fiber is easily accurately performed by hand. Accordingly, the cost required for the alignment is reduced and the alignment error due to the rolling of the optical fiber is not generated. In addition, the multi-step metal master is fabricated by using a photoresist film for X-ray exposure, and the narrow-pitch multi-channel optical coupling device is fabricated in a hot embossing method using the same, thereby the high-integrated device can be fabricated at a low price.Type: GrantFiled: November 10, 2004Date of Patent: January 23, 2007Assignee: Electronics and Telecommunications Research InstituteInventors: Jin Tae Kim, Byeong Cheol Kim, Myung Yung Jeong
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Patent number: 7149389Abstract: An optical printed circuit board system having a tapered optical waveguide is provided. The optical printed circuit board system includes a substrate as a printed circuit board having an electrical circuit and on which an electrical circuit chip is mounted, a system board including an optical bench coupled to the substrate and on which a photoelectrical signal chip electrically connected to the electrical circuit chip through the electrical circuit, an optical device electrically connected to the photoelectrical signal chip, and a first optical waveguide aligned to the optical device for optical coupling and tapered to have a smaller aperture in an output node for outputting the optical signals smaller than that in an input node for inputting the optical signals are mounted, and a back plane including a groove into which the system board is inserted and a second optical waveguide optically coupled to the first optical waveguide and tapered to have a smaller aperture in the output node than in the input node.Type: GrantFiled: June 30, 2004Date of Patent: December 12, 2006Assignee: Electronics and Telecommunications Research InstituteInventors: Keun Byoung Yoon, In Kui Cho, Seung Ho Ahn, Myung Yung Jeong
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Patent number: 7031584Abstract: A method of manufacturing an optical waveguide using a laser direct writing method is disclosed. More particularly, a method for improving refractive index profile of the optical waveguide by overlapping two or more beams using Gaussian laser beam is provided. In addition, it can accomplish an improved waveguide characteristics such as an offset structure of an S-bend type optical waveguide and an asymmetrical curve optical waveguide by individually adjusting the overlapped laser beams.Type: GrantFiled: October 3, 2003Date of Patent: April 18, 2006Assignee: Electronics and Telecommunications Research InstituteInventors: Woo Jin Lee, Seung Ho Ahn, Keun Byoung Yoon, Myung Yung Jeong
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Patent number: 7010199Abstract: An integrated type optical coupling device capable of easily accurately performing an optical arrangement between a narrow-pitch multi-channel optical waveguide and an optical fiber array and a master used in fabricating the same are provided. By forming a fixing projection between the optical fibers, the dynamic stability of the optical fiber array is increased and the optical arrangement between the optical waveguide and the optical fiber is easily accurately performed by hand. Accordingly, the cost required for the alignment is reduced and the alignment error due to the rolling of the optical fiber is not generated. In addition, the multi-step metal master is fabricated by using a photoresist film for X-ray exposure, and the narrow-pitch multi-channel optical coupling device is fabricated in a hot embossing method using the same, thereby the high-integrated device can be fabricated at a low price.Type: GrantFiled: December 27, 2002Date of Patent: March 7, 2006Assignee: Electronics and Telecommunications Research InstituteInventors: Jin Tae Kim, Byeong Cheol Kim, Myung Yung Jeong
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Patent number: 6955564Abstract: Provided is a differential pair interconnection apparatus for providing a differential signal on a printed circuit board having signal paths for high-speed differential signals to an external circuit and providing a signal inputted from the external circuit to the printed circuit board without any signal distortion. According to the differential pair interconnection apparatus of the present invention, there can be provided two separate physical channels without impedance mismatching.Type: GrantFiled: February 26, 2004Date of Patent: October 18, 2005Assignee: Electronics and Telecommunications Research InstituteInventors: In Kui Cho, Keun Byoung Yoon, Seung Ho Ahn, Sang Pil Han, Myung Yung Jeong
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Patent number: 6912332Abstract: The present invention relates to a parallel optical interconnection module for transmitting an optical signal over an optical fiber and receiving an optical signal from the optical fiber. According to the present invention, a reflection surface is formed at the end of the optical waveguide forming a core so that the path of light can be exactly changed and is focused. A light source/photodetector is buried within a trench using the silicon optical bench and an optical waveguide is manually aligned on the surface of the silicon optical bench, so that alignment error between the light source/photodetector and the optical waveguide can be minimized. A ferrule into which the optical waveguide is inserted is fixed to an adaptor so that alignment error between the optical waveguide and the light source/photodetector is minimized. Therefore, the present invention can minimize the coupling loss in the process during which the optical signal is transmitted to increase the optical output.Type: GrantFiled: October 4, 2002Date of Patent: June 28, 2005Assignee: Electronics and Telecommunications Research InstituteInventors: Sang-Pil Han, Choon Gi Choi, Byeong Cheol Kim, Seung Ho Ahn, In Kui Cho, Myung Yung Jeong
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Patent number: 6877912Abstract: An electro-optical circuit board (EOCB) in which an optical waveguide for transmitting an optical signal, and a driving unit/receiving unit and an optical source/optical detector for converting an electrical signal into the optical signal, and vice versa are integrated. The EOCB has a structure from which a lens is excluded for the purpose of an economical and efficient optical coupling between the optical waveguide and the optical source/optical detector. The optical source/optical detector are buried within a trench of a metal optical bench. The optical waveguide is then attached on the surface of the optical source/optical detector by means of an epoxy.Type: GrantFiled: November 1, 2002Date of Patent: April 12, 2005Assignee: Electronics and Telecommunication Research InstituteInventors: In Kui Cho, Keun Byoung Yoon, Sang Pil Han, Seung Ho Ahn, Myung Yung Jeong
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Publication number: 20040120676Abstract: A method of manufacturing an optical waveguide using a laser direct writing method is disclosed. More particularly, a method for improving refractive index profile of the optical waveguide by overlapping two or more beams using Gaussian laser beam is provided. In addition, it can accomplish an improved waveguide characteristics such as an offset structure of an S-bend type optical waveguide and an asymmetrical curve optical waveguide by individually adjusting the overlapped laser beams.Type: ApplicationFiled: October 3, 2003Publication date: June 24, 2004Inventors: Woo Jin Lee, Seung Ho Ahn, Keun Byoung Yoon, Myung Yung Jeong