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公开(公告)号：JPH09251661A
公开(公告)日：1997-09-22
申请号：JP5886796
申请日：1996-03-15
Applicant: SONY CORP
Inventor： MAEDA FUMISADA , WATANABE TOSHIO , ICHIMURA ISAO , OSATO KIYOSHI , FUKUMOTO ATSUSHI , YAMAMOTO KENJI
Abstract: PROBLEM TO BE SOLVED: To reproduce optical disks having different recording densities. SOLUTION: A first optical part 21 generates a laser beam and converges it with a prescribed numerical aperture corresponding to an optical disk 11a whose data recording density is low. A second optical part 22 converts the converged light from the first optical part 21 into the converged light having a prescribe numerical aperture corresponding to an optical disk 11b whose data recording density is high. When the optical disk 11 to be reproduced is the optical disk 11a, since the second optical part 22 is retreated from between the first optical part 21 and the optical disk 11a, the optical disk 11a is directly irradiated with the laser beam from the first optical part 21 and when the optical disk 11 is the optical disk 11b, since the second optical part 22 is inserted in between the first optical part 21 and the optical disk 11b, the optical disk 11b is irradiated with the laser beam from the second optical part 22.
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公开(公告)号：JPH09243805A
公开(公告)日：1997-09-19
申请号：JP5567696
申请日：1996-03-13
Applicant: SONY CORP
Inventor： YAMAMOTO KENJI , ICHIMURA ISAO , MAEDA FUMISADA , WATANABE TOSHIO , OSATO KIYOSHI
IPC: G02B3/00 , B29D11/00 , G01M11/02 , G02B3/02 , G02B27/00 , G11B7/00 , G11B7/125 , G11B7/135 , G11B7/1372 , G11B7/1374
Abstract: PROBLEM TO BE SOLVED: To design an objective lens and front lens constituting a two-group lens by discretely evaluating the aberrations possessed by the objective lens and the front lens. SOLUTION: The two-group lens composed of the objective lens LA-1 and the front lens LB-1 already corrected to be made aberrationless with respect to a substrate having a thickness d2 is subjected to measurement of the aberration with a substrate 71 having a thickness d1 by using an interferometer 61. At this time, the generated aberrations are corrected by correcting only the curved surface of the objective lens LA-1. The two-group lens formed in such a manner is capable of recording or reproduction of the information to and from a disk having the substrate of the thickness d1 by using the objective lens LA-1 and the front lens LB-1 and is capable of recording or reproduction of the information to and from the disk 2-2 having the thickness d2 by using only the front lens LB-1.
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公开(公告)号：JPH06243467A
公开(公告)日：1994-09-02
申请号：JP16839793
申请日：1993-06-16
Applicant: SONY CORP
Inventor： AKIYAMA YOSHIYUKI , OSATO KIYOSHI , ICHIMURA ISAO , YOSHIMURA SHUNJI , WATANABE TOSHIO , KATSURAMOTO SHINJI
IPC: G03B31/02 , G11B7/00 , G11B7/003 , G11B20/00 , G11B20/10 , G11B20/12 , G11B20/14 , G11B20/18 , G11B27/28 , G11B27/30 , H04R5/00
Abstract: PURPOSE:To provide a motion picture film which is rich in presence sound field in a reproducing system. CONSTITUTION:The film consists of a picture recording region 2, to which a picture is recorded, a perforation section 3 which transports the film and digital pattern data recording regions 5 and 6 which are provided in the vicinity of each section 3. In the region 5 and 6, audio data of plural number channels are recorded as digital patterns.
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公开(公告)号：JPH04184408A
公开(公告)日：1992-07-01
申请号：JP31558090
申请日：1990-11-20
Applicant: SONY CORP
Inventor： KABAYA YOSHITERU , NAKAO TAKASHI , OSATO KIYOSHI , OSUE TADASHI
Abstract: PURPOSE:To make the deflection of a laser beam minimum by attaching a 2nd holder so that its tilt can be adjusted to a 1st holder. CONSTITUTION:The 1st holder 5 is interposed between the 2nd holder 6 which supports a rotator prism 2 and an outside fixed housing 3, so that the tilt of the center of rotation of the prism 2 against the center of the rotation of a rotator can be adjusted in the longitudinal directions of the 1st and the 2nd holders 5 and 6. Furthermore, the housing 3 is attached to a base 1 so that its position can be freely adjusted. Therefore, the position of the center of the rotation of the prism 2 against the center of the rotation of the rotator is adjusted on the plane 1a of the base 1. Thus, the tilt of the center of the rotation and the position of the prism 2 against the center of the rotation of the rotator are easily and accurately adjusted, and the centers of the rotation of both of them are accurately and easily aligned, and the deflection of the laser beam is made minimum.
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公开(公告)号：JPH03162724A
公开(公告)日：1991-07-12
申请号：JP30276389
申请日：1989-11-21
Applicant: SONY CORP
Inventor： OSATO KIYOSHI , FUKUMOTO ATSUSHI
Abstract: PURPOSE:To speed up writing and/or reading-out by disposing an anamorphic prism in an optical path of the light beams from plural laser light sources to a recording medium. CONSTITUTION:The plural light beam 8 generated from the laser light source are expanded in diameter in a prescribed direction by the anamorphic prism 12. The beam shape of the plural light beams 8 can, therefore, be corrected to an approximately circular shape by disposing the anamorphic prism 12 in a prescribed direction. The light beams are thereby well condensed onto the recording medium 5. The recording density of the information signals which allow writing and/or reading-out is additionally improved in this way.
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Patent Agency Ranking
公开(公告)号：JPS6363136A
公开(公告)日：1988-03-19
申请号：JP20648886
申请日：1986-09-02
Applicant: SONY CORP
Inventor： MAEDA TAMOTSU , OSATO KIYOSHI , KOBAYASHI SEIJI , KAWAKUBO SHIN
IPC: G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/007 , G11B7/26 , G11B11/10 , G11B11/105
Abstract: PURPOSE:To shorten the time required for recording and to exactly record an operation reference signal in a prescribed position by providing a prescribed operation reference signal which is recorded with regard to each track linearly in parallel in the radial direction. CONSTITUTION:A CAV (constant angular velocity) system is adopted and by providing a track in a shape of a concentric circle, an operation reference signal can be provided in parallel in the radial direction and by moving a recording head 7 relatively in the radial direction, the operation reference signal is recorded. As the result, a ratio in which the optical head 7 scans an unrecorded area becomes small and the recording time can be shortened. Also, the accuracy of a recording position of the operation reference signal becomes high since the signal is aligned in good order in the radial direction and various operations such as a search operation, etc., can be executed satisfactorily.
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公开(公告)号：JPS6187225A
公开(公告)日：1986-05-02
申请号：JP20893684
申请日：1984-10-04
Applicant: Sony Corp
Inventor： SHINTANI KENJI , YAMADA TAKATOSHI , FUKUMOTO ATSUSHI , OSATO KIYOSHI
CPC classification number: G11B7/1353 , G11B7/0903 , G11B7/0956 , G11B7/135
Abstract: PURPOSE: To reduce the disturbance of variation in the tangential skew angle of an optical recording medium to a tracking error signal by arranging an optical attenuating means between a semiconductor laser element and the optical recording medium.
CONSTITUTION: The optical attenuating means is provided in the optical path between the semiconductor laser element 1 and optical recording medium 6. For example, a beam splitter 4 is used as the optical attenuating means; and its transmissivity is set relatively small (e.g. 25%) and its reflection factor is set relatively large (e.g. 65%) respectively. In this case, the loss is 10%. The beam splitter (half-mirror) 4 has a multilayered film 4
3 of a dielectric adhered between triangular prisms 4
1 and 4
3 . Its film thickness and number of layers are controlled to control the transmissivity and reflection factor.
COPYRIGHT: (C)1986,JPO&JapioAbstract translation: 目的：通过在半导体激光元件和光记录介质之间布置光衰减装置，减少光记录介质的切向偏斜角对跟踪误差信号的变化的干扰。 构成：光衰减装置设置在半导体激光元件1和光记录介质6之间的光路中。例如，使用分束器4作为光衰减装置; 并且其透射率设定为相对较小（例如25％），并且其反射系数分别设定为相对较大（例如65％）。 在这种情况下，损失是10％。 分束器（半反射镜）4具有粘附在三角棱镜41和43之间的电介质的多层膜43.控制其膜厚度和层数以控制透射率和反射系数。
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公开(公告)号：JPS6132228A
公开(公告)日：1986-02-14
申请号：JP15117084
申请日：1984-07-23
Applicant: Sony Corp
Inventor： OSATO KIYOSHI
IPC: G11B7/09
Abstract: PURPOSE:To remove a DC offset component by sampling and holding a tracking error signals outputted from a photodetector separately as the signal of a pit part of an optical disk and the signal of a land part, and supplying those sample holding outputs to an operational amplifier. CONSTITUTION:This system has the photodetecting element 6 on which a spot of reflected light from the optical disk is formed, a subtracting circuit 7 which detects a tracking signal, and an adding circuit 8 which outputs the sum of detection signals of photodetection surfaces A and B. The 1st sample and hold circuit 9 samples a tracking error signal when a pit is irradiated with a light beam and the 2nd sample and hold circuit 10 samples a signal when a gap between pits, i.e. land part is irradiated with the light beam. Signals obtained by the 1st and the 2nd sample and hold circuits 9 and 10 are inputted to the differential amplifier circuit 11 to cancel the DC offset component, and then the differential amplifier circuit 11 outputs only the tracking error signal.
Abstract translation: 目的：通过采样并保持从光电检测器输出的跟踪误差信号作为光盘的凹坑部分的信号和接地部分的信号，并将这些采样保持输出提供给运算放大器来去除DC偏移分量 。 构成：该系统具有形成有来自光盘的反射光的光的光检测元件6，检测跟踪信号的减法电路7和输出光检测面A和 B.当采用光束照射凹坑时，第一采样和保持电路9对跟踪误差信号进行采样，当第二采样和保持电路10在凹坑（即，接地部分）之间的间隙照射光束时对第二采样和保持电路10采样信号。 由第1和第2采样和保持电路9和10获得的信号被输入到差分放大器电路11以消除DC偏移分量，然后差分放大器电路11仅输出跟踪误差信号。
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39.发明专利
公开(公告)号：JP2005293636A
公开(公告)日：2005-10-20
申请号：JP2004103006
申请日：2004-03-31
Inventor： ICHIMURA ISAO , OSATO KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To realize improvement in the S/N of a track error signal even in a next generation optical disk apparatus with the trend moving toward decreasingly smaller error signal strength. SOLUTION: The optical disk apparatus disclosed herein is configured to include: a 4-division light receiving element for detecting a reflected light of a major beam; and two N-division light receiving elements each for detecting a reflected light of a sub beam, the 4-division light receiving element and the N-division light receiving elements sampling a light receiving signal when a light collection spot scans information pits to generate a track control error signal. Further, an optical disk 11 forms the depth of the information pits within a range from λ/8n to λ/4n (λ is a light source wavelength and n is a refractive index of a light transmission protection layer of the optical disk) so that a reproduction signal of the information pits and the track control error signal by the differential push-pull method can both be detectable. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract translation: 要解决的问题：即使在下一代光盘装置中，即使趋向于越来越小的误差信号强度的趋势，也能够实现轨道误差信号的S / N的提高。 解决方案：本文公开的光盘装置被配置为包括：用于检测主梁的反射光的4分光接收元件; 以及两个用于检测子光束的反射光的N分光接收元件，当光采集点扫描信息凹坑时，4分光接收元件和N分光接收元件对光接收信号进行采样以产生 轨道控制误差信号。 此外，光盘11在从λ/ 8n到λ/ 4n（λ是光源波长，n是光盘的光传输保护层的折射率）的范围内形成信息坑的深度，使得 信息凹坑的再现信号和通过差分推挽方法的轨道控制误差信号都可以被检测到。 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2003263770A
公开(公告)日：2003-09-19
申请号：JP2002060484
申请日：2002-03-06
Applicant: SONY CORP
Inventor： ICHIMURA ISAO , KIJIMA KOICHIRO , YAMAMOTO KENJI , OSATO KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To improve recording capacity per one piece of an optical recording medium by conducting recording/playback of a multilayered optical recording medium by a near field optical recording method using an objective lens of a large numerical aperture exceeding 1. SOLUTION: An optical recording/playback device emits a light beam from an optical head 30 to an optical recording medium 10 for conducting recording/playback. The optical recording medium has a plurality of information record layers 16, and the uppermost information record layer is covered with a transparent protection layer 20. The optical head is provided with: an optical system which emits a convergent light beam from a beam emission surface of the objective lens with a numerical aperture larger than 1 toward the optical recording medium; an air gap maintenance mechanism which maintains an air gap between the beam emission surface of the objective lens and the surface of the optical recording medium to a minute air gap in which light propagation by an evanescent wave is possible; a focal position controller which focuses the convergent light beam with a desired depth of the optical recording medium; and a spherical-aberration correction mechanism which corrects spherical aberration when the convergent light beam focuses within the optical recording medium. COPYRIGHT: (C)2003,JPO
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