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公开(公告)号：DE69618908T2
公开(公告)日：2002-08-29
申请号：DE69618908
申请日：1996-11-21
Applicant: SONY CORP
Inventor： YAMAKAWA AKIO , UEMURA KAMON
Abstract: A laser diode (41) applies a laser beam through a grating (42), a beam splitter (43), and an objective (44) to a compact disc. A laser beam reflected by the compact disc is applied through the objective and the beam splitter to a photodiode (61). The objective (44) has a large numerical aperture of 0.6 in order to be able to playback a digital video disc (20) that has a thin substrate and contains information recorded at a high density. To prevent the photodiode (61) from suffering aberrations caused due to the large numerical aperture of the objective, the photodiode has a relatively small photodetector unit (61-1) having a normalized detector size ranging from 3 mu m to 16 mu m, for detecting only returning light up to a numerical aperture of 0.3 and not detecting light of greater numerical aperture values.
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公开(公告)号：DE69609902T2
公开(公告)日：2001-03-22
申请号：DE69609902
申请日：1996-06-12
Applicant: SONY CORP
Inventor： UEMURA KAMON , OHSATO KIYOSHI , YAMAKAWA AKIO , UTSUMI MASAMICHI
Abstract: An optical pickup includes a light source (21) for radiating a light beam, a diffraction element (22) for separating a light beam radiated from the light source into at least three beams, namely a main beam and two side beams, an objective lens (25) for converging the light beams separated by the diffraction element onto a signal recording surface of an optical recording medium (11), a light receiving unit (24) having a four-segment first light receiving portion (71) for receiving the main beam reflected by the recording surface of the optical recording medium and second and third light receiving portions (72, 73) arranged on respective sides of the first light receiving portion (71) for receiving the side beams reflected by the recording surface of the optical recording medium, and a calculation unit (26) for generating one tracking signal based on respective outputs of the first light receiving portion and for generating another tracking signal based on outputs of the second and third light receiving portions. In preferred emodiments of the apparatus, a disc discrimination unit sends a detection output of the optical disc both to the changeover switch selecting the desired tracking error signal and to an aperture ratio variable control unit.
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公开(公告)号：MX9602266A
公开(公告)日：1997-10-31
申请号：MX9602266
申请日：1996-06-10
Applicant: SONY CORP
Inventor： UEMURA KAMON , OHSATO KIYOSHI , YAMAKAWA AKIO , UTSUMI MASAMICHI
Abstract: Un dispositivo de captacion optico que incluye una fuente luminosa para irradiar un haz luminoso, un elemento de difraccion para separar un haz luminoso irradiado de la fuente luminosa en por lo menos tres haces, a saber un haz principal y dos haces laterales, un lente objetivo para convergir los haces luminosos separados por el elemento de difraccion sobre una superficie de registro de señales del medio de registro optico, una unidad receptora de luz que tiene una primera porcion receptora de luz de cuatro segmentos para recibir el haz principal reflejado por la superficie de registro del medio de registro optico y segunda y tercera porciones receptoras de luz colocadas a ambos lados de la primera porcion receptora de luz para recibir los haces laterales reflejados mediante la superficie de registro del medio optico, y una unidad de cálculo para generar una primera señal de seguimiento basándose en las salidas respectivas de la primera porcion receptora de luz para generar una segunda señal de seguimiento basándose en las salidas de la segunda y tercera porciones receptoras de luz.
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4.发明公开Apparatus for and method of recording information on or reproducing information from a recording medium 失效装置和方法，用于从记录介质上记录的记录介质上的信息或再现信息
公开(公告)号：EP0776003A3
公开(公告)日：1998-09-16
申请号：EP96402501
申请日：1996-11-21
Applicant: SONY CORP
Inventor： YAMAKAWA AKIO , UEMURA KAMON
CPC classification number: G11B7/133 , G11B7/0037 , G11B7/0909 , G11B7/131 , G11B7/1381 , G11B2007/0006
Abstract: A laser diode (41) applies a laser beam through a grating (42), a beam splitter (43), and an objective (44) to a compact disc. A laser beam reflected by the compact disc is applied through the objective and the beam splitter to a photodiode (61). The objective (44) has a large numerical aperture of 0.6 in order to be able to playback a digital video disc (20) that has a thin substrate and contains information recorded at a high density. To prevent the photodiode (61) from suffering aberrations caused due to the large numerical aperture of the objective, the photodiode has a relatively small photodetector unit (61-1) having a normalized detector size ranging from 3 µm to 16 µm, for detecting only returning light up to a numerical aperture of 0.3 and not detecting light of greater numerical aperture values.
Abstract translation: 的激光二极管（41）通过一个光栅（42），分束器（43），和客观（44）到一光盘适用的激光束。 由光盘反射的激光束通过物镜和分束器的光电二极管（61）中的应用。 物镜（44）具有0.6的数值孔径大，以便能够播放数字视频盘（20）做有一个薄的基板和含有记录在一个高密度信息。 为了防止引起患像差光电二极管（61），由于物镜的数值孔径大，光电二极管包括具有归一化检测尺寸为3微米到16微米的相对小光电检测器单元（61-1），用于 仅检测返回光到0.3的数值孔径和不大于检测数值孔径值的光。
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公开(公告)号：EP3032313A4
公开(公告)日：2017-03-08
申请号：EP14835035
申请日：2014-08-05
Applicant: RICOH IND SOLUTIONS INC , SONY CORP
Inventor： ISHIZUKA KENICHI , UEMURA KAMON
CPC classification number: G02B25/001 , G02B13/18 , G02B13/22 , G02B25/004 , G02B27/0172 , G02B2027/011
Abstract: The present invention addresses the problem of achieving an eyepiece lens system having a large amount of allowable eccentricity. This eyepiece system forms a magnified virtual image of an observation object, and the eyepiece system has a horizontal angle of view of 40 degrees or more. The maximum amount of eccentricity S that makes the proportion of the amount of change, ” mm, in tangential field curvature in the amount of eccentricity, S mm, between the optical axis Ax and an observer's eye satisfy Condition (1), namely, -0.25
Abstract translation: 本发明解决了实现具有大量允许偏心率的目镜透镜系统的问题。 该目镜系统形成观察对象的放大虚像，目镜系统的水平视角为40度以上。 使光轴Ax与观察者眼睛之间的偏心量S mm之间的切线场曲率中的变化量的比例“mm”的最大偏心量S满足条件（1），即 - 0.25 <“/ S <0，在所有图像高度为3mm以上。
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Patent Agency Ranking
公开(公告)号：ES2149435T3
公开(公告)日：2000-11-01
申请号：ES96401271
申请日：1996-06-12
Applicant: SONY CORP
Inventor： UEMURA KAMON , OHSATO KIYOSHI , YAMAKAWA AKIO , UTSUMI MASAMICHI
Abstract: An optical pickup includes a light source (21) for radiating a light beam, a diffraction element (22) for separating a light beam radiated from the light source into at least three beams, namely a main beam and two side beams, an objective lens (25) for converging the light beams separated by the diffraction element onto a signal recording surface of an optical recording medium (11), a light receiving unit (24) having a four-segment first light receiving portion (71) for receiving the main beam reflected by the recording surface of the optical recording medium and second and third light receiving portions (72, 73) arranged on respective sides of the first light receiving portion (71) for receiving the side beams reflected by the recording surface of the optical recording medium, and a calculation unit (26) for generating one tracking signal based on respective outputs of the first light receiving portion and for generating another tracking signal based on outputs of the second and third light receiving portions. In preferred emodiments of the apparatus, a disc discrimination unit sends a detection output of the optical disc both to the changeover switch selecting the desired tracking error signal and to an aperture ratio variable control unit.
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公开(公告)号：AT195829T
公开(公告)日：2000-09-15
申请号：AT96401271
申请日：1996-06-12
Applicant: SONY CORP
Inventor： UEMURA KAMON , OHSATO KIYOSHI , YAMAKAWA AKIO , UTSUMI MASAMICHI
Abstract: An optical pickup includes a light source (21) for radiating a light beam, a diffraction element (22) for separating a light beam radiated from the light source into at least three beams, namely a main beam and two side beams, an objective lens (25) for converging the light beams separated by the diffraction element onto a signal recording surface of an optical recording medium (11), a light receiving unit (24) having a four-segment first light receiving portion (71) for receiving the main beam reflected by the recording surface of the optical recording medium and second and third light receiving portions (72, 73) arranged on respective sides of the first light receiving portion (71) for receiving the side beams reflected by the recording surface of the optical recording medium, and a calculation unit (26) for generating one tracking signal based on respective outputs of the first light receiving portion and for generating another tracking signal based on outputs of the second and third light receiving portions. In preferred emodiments of the apparatus, a disc discrimination unit sends a detection output of the optical disc both to the changeover switch selecting the desired tracking error signal and to an aperture ratio variable control unit.
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公开(公告)号：BR9605619A
公开(公告)日：1998-08-18
申请号：BR9605619
申请日：1996-11-19
Applicant: SONY CORP
Inventor： YAMAKAWA AKIO , UEMURA KAMON
Abstract: A laser diode (41) applies a laser beam through a grating (42), a beam splitter (43), and an objective (44) to a compact disc. A laser beam reflected by the compact disc is applied through the objective and the beam splitter to a photodiode (61). The objective (44) has a large numerical aperture of 0.6 in order to be able to playback a digital video disc (20) that has a thin substrate and contains information recorded at a high density. To prevent the photodiode (61) from suffering aberrations caused due to the large numerical aperture of the objective, the photodiode has a relatively small photodetector unit (61-1) having a normalized detector size ranging from 3 mu m to 16 mu m, for detecting only returning light up to a numerical aperture of 0.3 and not detecting light of greater numerical aperture values.
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公开(公告)号：CZ341496A3
公开(公告)日：1998-02-18
申请号：CZ341496
申请日：1996-11-20
Applicant: SONY CORP
Inventor： YAMAKAWA AKIO , UEMURA KAMON
Abstract: A laser diode (41) applies a laser beam through a grating (42), a beam splitter (43), and an objective (44) to a compact disc. A laser beam reflected by the compact disc is applied through the objective and the beam splitter to a photodiode (61). The objective (44) has a large numerical aperture of 0.6 in order to be able to playback a digital video disc (20) that has a thin substrate and contains information recorded at a high density. To prevent the photodiode (61) from suffering aberrations caused due to the large numerical aperture of the objective, the photodiode has a relatively small photodetector unit (61-1) having a normalized detector size ranging from 3 mu m to 16 mu m, for detecting only returning light up to a numerical aperture of 0.3 and not detecting light of greater numerical aperture values.
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公开(公告)号：AU5580796A
公开(公告)日：1997-01-02
申请号：AU5580796
申请日：1996-06-06
Applicant: SONY CORP
Inventor： UEMURA KAMON , OHSATO KIYOSHI , YAMAKAWA AKIO , UTSUMI MASAMICHI
Abstract: An optical pickup includes a light source (21) for radiating a light beam, a diffraction element (22) for separating a light beam radiated from the light source into at least three beams, namely a main beam and two side beams, an objective lens (25) for converging the light beams separated by the diffraction element onto a signal recording surface of an optical recording medium (11), a light receiving unit (24) having a four-segment first light receiving portion (71) for receiving the main beam reflected by the recording surface of the optical recording medium and second and third light receiving portions (72, 73) arranged on respective sides of the first light receiving portion (71) for receiving the side beams reflected by the recording surface of the optical recording medium, and a calculation unit (26) for generating one tracking signal based on respective outputs of the first light receiving portion and for generating another tracking signal based on outputs of the second and third light receiving portions. In preferred emodiments of the apparatus, a disc discrimination unit sends a detection output of the optical disc both to the changeover switch selecting the desired tracking error signal and to an aperture ratio variable control unit.
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