Patents by Inventor Hae-jung Suh
Hae-jung Suh 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: 7324424Abstract: A compatible optical pickup includes an optical disc, an objective lens, a diffractive device, and a divergent lens. The optical unit emits a short wavelength light beam corresponding to a high density optical disc and a long wavelength light beam corresponding to a low density optical disc. The objective lens forms a light spot on the high density optical disc and the low density optical disc and the diffractive device diffracts the short wavelength light beam to correct chromatism according to a change in a wavelength of the short wavelength light beam. The divergent lens refracts the long wavelength light beam toward the objective lens to increase a working distance with respect to the low density optical disc.Type: GrantFiled: November 15, 2002Date of Patent: January 29, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Tae-kyung Kim, Young-man Ahn, Chong-sam Chung, Hae-jung Suh, Jin-kyung Lee, Jong-bae Kim
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Patent number: 7242659Abstract: An optical pickup for a recording medium includes a light beam division and detection unit including receiving portions dividing an incident light beam reflected on the recording medium into a first light beam portion and a second light beam portion around the first light beam portion and converting the first and second light beam portions into first and second detection signals, respectively. A thickness variation detection circuit detects a variation in thickness of the recording medium according to the first and second detection signals and outputs a thickness variation signal indicative thereof.Type: GrantFiled: August 30, 2005Date of Patent: July 10, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Chong-sam Chung, Young-man Ahn, Tae-kyung Kim, Hae-jung Suh
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Patent number: 7180846Abstract: A compatible optical pickup for recording and/or reproducing information on/from multiple kinds of optical discs having different thicknesses by selectively using source lights of respective different wavelengths corresponding to a kind of disc and using a common objective lens. At least one phase compensator, which compensates a phase of a light having a particular wavelength to correct for spherical aberration due to a thickness difference between the kinds of optical discs and/or chromatic aberration due to a wavelength difference between the required source lights, is positioned between the source lights and an entrance pupil of the objective lens. Each phase compensator compensates light of at least one wavelength and passes light of at least one other wavelength without significant relative phase alteration. By using two phase compensators, the optical pickup may be made compatible with at least three kinds of optical discs.Type: GrantFiled: October 31, 2002Date of Patent: February 20, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Tae-kyung Kim, Young-man Ahn, Hae-jung Suh, Jin-kyung Lee, Jong-bae Kim, Chong-sam Chung
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Patent number: 7131128Abstract: An optical pickup actuator for use with a recording medium includes a swing arm pivoting in a tracking direction with respect to the recording medium, a first driving unit pivoting the swing arm, an optical pickup facing the recording medium, an elastic member having one end fixed to the swing arm and a free end portion elastically deformable in a focus direction with respect to the recording medium, wherein the optical pickup is coupled to the free end portion of the elastic member, and a second driving unit deforming and driving the elastic member.Type: GrantFiled: November 7, 2003Date of Patent: October 31, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Seok-jung Kim, Kim Kwang, Chong-sam Chung, Hae-jung Suh, Sun-mo Kim, Jin-won Lee
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Patent number: 7035186Abstract: An optical pickup for a recording medium includes a light beam division and detection unit including receiving portions dividing an incident light beam reflected on the recording medium into a first light beam portion and a second light beam portion around the first light beam portion and converting the first and second light beam portions into first and second detection signals, respectively. A thickness variation detection circuit detects a variation in thickness of the recording medium according to the first and second detection signals and outputs a thickness variation signal indicative thereof.Type: GrantFiled: November 6, 2001Date of Patent: April 25, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Chong-sam Chung, Young-man Ahn, Tae-kyung Kim, Hae-jung Suh
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Patent number: 7020051Abstract: An optical pickup is provided for a recording medium, including: a light source generating and emitting a light beam; a light beam division and detection unit dividing a particular light beam portion of the light beam after being reflected/diffracted from the recording medium into sub-divided light beams portions, and detecting the sub-divided light beam portions; and a spherical aberration detection circuit processing the sub-divided light beam portions to detect spherical aberration caused by thickness variation of the recording medium.Type: GrantFiled: October 31, 2001Date of Patent: March 28, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Tae-kyung Kim, Young-man Ahn, Hae-jung Suh, Chong-sam Chung
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Publication number: 20050286376Abstract: An optical pickup for a recording medium includes a light beam division and detection unit including receiving portions dividing an incident light beam reflected on the recording medium into a first light beam portion and a second light beam portion around the first light beam portion and converting the first and second light beam portions into first and second detection signals, respectively. A thickness variation detection circuit detects a variation in thickness of the recording medium according to the first and second detection signals and outputs a thickness variation signal indicative thereof.Type: ApplicationFiled: August 30, 2005Publication date: December 29, 2005Applicant: Samsung Electronics Co., Ltd.Inventors: Chong-sam Chung, Young-man Ahn, Tae-kyung Kim, Hae-jung Suh
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Publication number: 20040148619Abstract: An optical pickup actuator for use with a recording medium includes a swing arm pivoting in a tracking direction with respect to the recording medium, a first driving unit pivoting the swing arm, an optical pickup facing the recording medium, an elastic member having one end fixed to the swing arm and a free end portion elastically deformable in a focus direction with respect to the recording medium, wherein the optical pickup is coupled to the free end portion of the elastic member, and a second driving unit deforming and driving the elastic member.Type: ApplicationFiled: November 7, 2003Publication date: July 29, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Seok-jung Kim, Kim Kwang, Chong-sam Chung, Hae-jung Suh, Sun-mo Kim, Jin-won Lee
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Publication number: 20030107979Abstract: A compatible optical pickup includes an optical disc, an objective lens, a diffractive device, and a divergent lens. The optical unit emits a short wavelength light beam corresponding to a high density optical disc and a long wavelength light beam corresponding to a low density optical disc. The objective lens forms a light spot on the high density optical disc and the low density optical disc and the diffractive device diffracts the short wavelength light beam to correct chromatism according to a change in a wavelength of the short wavelength light beam. The divergent lens refracts the long wavelength light beam toward the objective lens to increase a working distance with respect to the low density optical disc.Type: ApplicationFiled: November 15, 2002Publication date: June 12, 2003Applicant: Samsung Electronics Co., Ltd.Inventors: Tae-kyung Kim, Young-man Ahn, Chong-sam Chung, Hae-jung Suh, Jin-kyung Lee, Jong-bae Kim
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Publication number: 20030095334Abstract: A compatible optical pickup for recording and/or reproducing information on/from multiple kinds of optical discs having different thicknesses by selectively using source lights of respective different wavelengths corresponding to a kind of disc and using a common objective lens. At least one phase compensator, which compensates a phase of a light having a particular wavelength to correct for spherical aberration due to a thickness difference between the kinds of optical discs and/or chromatic aberration due to a wavelength difference between the required source lights, is positioned between the source lights and an entrance pupil of the objective lens. Each phase compensator compensates light of at least one wavelength and passes light of at least one other wavelength without significant relative phase alteration. By using two phase compensators, the optical pickup may be made compatible with at least three kinds of optical discs.Type: ApplicationFiled: October 31, 2002Publication date: May 22, 2003Applicant: Samsung Electronics Co., LtdInventors: Tae-kyung Kim, Young-man Ahn, Hae-jung Suh, Jin-kyung Lee, Jong-bae Kim, Chong-sam Chung
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Publication number: 20020114240Abstract: An optical pickup for a recording medium includes a light beam division and detection unit including receiving portions dividing an incident light beam reflected on the recording medium into a first light beam portion and a second light beam portion around the first light beam portion and converting the first and second light beam portions into first and second detection signals, respectively. A thickness variation detection circuit detects a variation in thickness of the recording medium according to the first and second detection signals and outputs a thickness variation signal indicative thereof.Type: ApplicationFiled: November 6, 2001Publication date: August 22, 2002Applicant: Samsung Electronics Co., Ltd.Inventors: Chong-Sam Chung, Young-Man Ahn, Tae-Kyung Kim, Hae-Jung Suh
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Publication number: 20020101798Abstract: An optical pickup is provided for a recording medium, including: a light source generating and emitting a light beam; a light beam division and detection unit dividing a particular light beam portion of the light beam after being reflected/diffracted from the recording medium into sub-divided light beams portions, and detecting the sub-divided light beam portions; and a spherical aberration detection circuit processing the sub-divided light beam portions to detect spherical aberration caused by thickness variation of the recording medium.Type: ApplicationFiled: October 31, 2001Publication date: August 1, 2002Inventors: Tae-Kyung Kim, Young-man Ahn, Hae-jung Suh, Chong-sam Chung
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Patent number: 6346367Abstract: An optical disk with an improved structure of an information pit, and a method of manufacturing the same. The optical disk has projections respectively projecting from bottom surfaces of a plurality of information pits. Also, in the optical disk, laser beams irradiated onto the information pits from an optical pickup to read information recorded on the optical disk are scattered by the projections. Thus, among the laser beams irradiated onto the information pits, the laser beams reflected toward the optical pickup are largely decreased, so that an amplitude and resolution of a reproduced signal are greatly increased, thereby significantly improving reproduction characteristics of the optical disk.Type: GrantFiled: November 3, 1999Date of Patent: February 12, 2002Assignee: Samsung Electronics Co., Ltd.Inventors: Young-man Ahn, Hae-jung Suh
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Patent number: 6009071Abstract: An optical disk with an improved structure of an information pit, and a method of manufacturing the same. The optical disk has projections respectively projecting from bottom surfaces of a plurality of information pits. Also, in the optical disk, laser beams irradiated onto the information pits from an optical pickup to read information recorded on the optical disk are scattered by the projections. Thus, among the laser beams irradiated onto the information pits, the laser beams reflected toward the optical pickup are largely decreased, so that an amplitude and resolution of a reproduced signal are greatly increased, thereby significantly improving reproduction characteristics of the optical disk.Type: GrantFiled: June 12, 1998Date of Patent: December 28, 1999Assignee: Samsung Electronics Co., Ltd.Inventors: Young-man Ahn, Hae-jung Suh