公开(公告)号：JP2012243347A

公开(公告)日：2012-12-10

申请号：JP2011112011

申请日：2011-05-19

Applicant: Sony Corp ,  ソニー株式会社

Inventor： YAMAMOTO KENJI ,  NAKAO TAKASHI

IPC: G11B7/09 ,  G11B7/007 ,  G11B7/135

CPC classification number: G11B7/0908 ,  B82Y10/00 ,  G11B7/24038 ,  G11B7/2405

Abstract: PROBLEM TO BE SOLVED: To achieve stable focus servo control in an optical recording system using a pulse laser beam as a laser beam for recording.SOLUTION: A pulse laser beam for recording is irradiated, and separately from this, a first CW laser whose optical axis is inclined is irradiated for focus servo control. Since the optical axis of the first CW laser beam is inclined with respect to the pulse laser beam at this time, only reflected light of the first CW laser beam can selectively be received. This can effectively suppress influence given by the pulse laser beam during focus servo control, and consequently, focus servo control during recording can be performed in a stabler manner in an optical recording system using a pulse laser beam for a recording laser beam.

Abstract translation: 要解决的问题：在使用脉冲激光束作为记录的激光束的光学记录系统中实现稳定的聚焦伺服控制。

解决方案：照射用于记录的脉冲激光束，并且与此分开地照射光轴倾斜的第一CW激光用于聚焦伺服控制。 由于此时第一CW激光束的光轴相对于脉冲激光束倾斜，所以只能选择性地接收第一CW激光束的反射光。 这可以有效地抑制在聚焦伺服控制期间由脉冲激光束产生的影响，因此，可以在使用用于记录激光束的脉冲激光束的光学记录系统中以更稳定的方式执行记录期间的聚焦伺服控制。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2007335047A

公开(公告)日：2007-12-27

申请号：JP2006168969

申请日：2006-06-19

Applicant: Sony Corp ,  ソニー株式会社

Inventor： NAKAO TAKASHI

IPC: G11B7/13 ,  G11B7/004 ,  G11B7/09

CPC classification number: G11B7/0906 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/131 ,  G11B2007/0013

Abstract: PROBLEM TO BE SOLVED: To realize detection of a DPD signal while achieving the 1 spot push-pull method, and also realize handling of an optical disk having a plurality of signal layers. SOLUTION: An apparatus generates a tracking error signal using outputs of light receiving regions A to G which receive a spot of light reflected from an information recording layer of the optical disk. An offset may occur in this tracking error signal due to stray light from another information recording layer of the optical disk. Therefore, the apparatus performs correction to remove the offset in the tracking error signal using a difference between outputs of the disk inner periphery side areas AA and DD and outputs of the disk outer periphery side areas BB and CC, of the light receiving regions AA to DD which receive the stray light. The present invention is applicable to an optical disk apparatus which can perform at least one of reproduction and recording. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：实现1点推挽方法时实现DPD信号的检测，并且还实现具有多个信号层的光盘的处理。 解决方案：装置利用接收从光盘的信息记录层反射的光点的光接收区域A至G的输出产生跟踪误差信号。 由于来自光盘的另一信息记录层的杂散光，该跟踪误差信号可能会发生偏移。 因此，该装置使用光盘内周侧区域AA和DD的输出与光接收区域AA的盘外周边区域BB和CC的输出之间的差异来执行校正以消除跟踪误差信号中的偏移 DD接收杂散光。 本发明可应用于能够执行再现和记录中的至少一个的光盘装置。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2005346882A

公开(公告)日：2005-12-15

申请号：JP2004168462

申请日：2004-06-07

Applicant: Sony Corp ,  ソニー株式会社

Inventor： NAKAO TAKASHI

IPC: G11B7/09 ,  G11B7/00 ,  G11B7/135 ,  G11B7/13

CPC classification number: G11B7/131 ,  G11B7/0903 ,  G11B7/0943 ,  G11B2007/0013

Abstract: PROBLEM TO BE SOLVED: To reduce a phenomenon in which operation of a differential push pull error signal becomes inaccurate at the time of reproducing records of a multi-layer disk. SOLUTION: In an optical head device, a photo detector section (I, J) which detects interlayer stray light elements as a 3rd photo detector section is provided in addition to the provision of a 1st photo detector for acquiring a push-pull signal of the 0th diffracted light (A-D) and a 2nd photo detector section for acquiring a push pull signal of the ±1st diffracted light (E, F, G, H). Influence of the interlayer stray light is reduced by generating a signal for normalization of the ±1st diffracted light using the detection signal of the 3rd photo detection section. Namely, a signal for normalization is generated by subtracting a signal multiplied the 3rd photo detector section's detection signal (stray light element) by a coefficient from the 2nd photo detector section's addition signal (addition signal of the ±1st diffracted light), and the 2nd photo detector section's push pull signal (push pull signal of the ±1st diffracted light) is normalized using this signal. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了减少在再现多层盘的记录时差分推挽误差信号的操作变得不准确的现象。 解决方案：在光学头装置中，除了提供用于获取推挽的第一光检测器之外，还提供了检测作为第三光检测器部分的层间杂散光元件的光电检测器部分（I，J） 第二衍射光（AD）的信号和用于获取±第一衍射光（E，F，G，H）的推挽信号的第二光检测器部分。 通过使用第3光检测部的检测信号，生成用于±1次衍射光的归一化的信号来减少层间杂散光的影响。 即，通过从第二光电检测器部分的相加信号（±第一衍射光的相加信号）中减去乘以第三光检测器部分的检测信号（杂散光元件）的信号的信号产生用于归一化的信号，第二 使用该信号对光电检测器部分的推挽信号（±1衍射光的推挽信号）进行归一化。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005293809A

公开(公告)日：2005-10-20

申请号：JP2004111508

申请日：2004-04-05

Applicant: Sony Corp ,  ソニー株式会社

Inventor： ICHIMURA ISAO ,  NAKAO TAKASHI

IPC: G11B7/09 ,  G11B7/13

Abstract: PROBLEM TO BE SOLVED: To reduce a phenomenon that an arithmetic operation of a differential push-pull error signal is inaccurate at recording/reproduction of an optical disk having a plurality of information recording layers and detect a proper track control error signal.
SOLUTION: The size of a light receiving face of two-division light receiving elements 274, 275 for detecting a sub beam used for only detecting the track control error signal is made smaller than the size of a light receiving face of a 4-division light receiving element 273 for a major beam for reproducing an information signal. Concretely, the light receiving elements 274, 275 resulting from obliquely cutting off the four corners of the light receiving elements each having a square outer shape are employed. Further, in addition, the effect due to inter-layer stray light can be more reduced by selecting a coefficient (k) in an error computing equation (10) depending on the number of layers of the optical disk such as a single layer disk or a double layer disk.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了减少在具有多个信息记录层的光盘的记录/再现时差分推挽误差信号的算术运算不准确的现象，并且检测适当的轨道控制误差信号。 解决方案：用于检测用于仅检测轨道控制误差信号的子光束的两分光接收元件274,275的光接收面的尺寸小于4的光接收面的尺寸 用于再现信息信号的主波束的分光接收元件273。 具体地，采用由倾斜地切断每个具有正方形外形的光接收元件的四个角落产生的光接收元件274,275。 此外，另外，通过根据诸如单层盘的光盘的层数选择误差计算方程式（10）中的系数（k），可以进一步减少由层间杂散光引起的影响，或者 一个双层盘。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JPH07120851A

公开(公告)日：1995-05-12

申请号：JP27044193

申请日：1993-10-28

Applicant: SONY CORP

Inventor： NAKAO TAKASHI

IPC: G03B31/02 ,  G11B7/00 ,  G11B7/003 ,  G11B7/005

Abstract: PURPOSE:To lessen the influence of flaws and dust on a film and to improve the fidelity of reproduction of sound data by arranging the base surface of the film on the illumination side and the emulsion surface of the film on the objective lens side at the time of reproducing the digital signals optically stored on the film by using a transmitted light. CONSTITUTION:The illumination light emitted from a halogen lamp 1 is introduced by a mirror 2 onto the motion picture film 4 wound around a drum 5 by a light guide 3. At this time, the motion picture film 4 is so arranged that the side illuminated by the irradiation light from the halogen lamp 1 is the base surface and the objective lens 6 side is the emulsion surface. The illumination light transmitted through the motion picture film is condensed by the objective lens 6 and is sent to a CCD 7. The flaws and the flaws of the dust sticking to the base surface side of the motion picture film 4 are focused by the objective lens 6 and, therefore, the influence that the flaws and dust exert on digital sound data is lessened.

公开(公告)号：JPH04353647A

公开(公告)日：1992-12-08

申请号：JP12767191

申请日：1991-05-30

Applicant: SONY CORP

Inventor： OSUE TADASHI ,  KABAYA YOSHITERU ,  NARAHARA TATSUYA ,  NAKAO TAKASHI

IPC: G11B15/093

Abstract: PURPOSE:To stably and effectively control a lateral position of a magnetic tape by a leadless guide. CONSTITUTION:A lateral position of a tape 2 is guided by a lead of a guide 3 and set from mounting to starting of the tape 2. After the tape is started, a reference signal previously recorded on the tape 2 is reproduced by a pair of detectors 5, and input to a differential amplifier 11. The amplifier 11 outputs an error signal to a drive amplifier 12, which outputs a drive signal to the guide 3. A piezoelectric element arranged on the guide 3 is elongated or contracted by a tape run start signal to lower the lead of the guide 3 thereby to release guiding of the tape 2 by the guide 3. Simultaneously, with the element arranged on a roller type leadless guide 4 as an actuator the position of the tape is optimally controlled.

公开(公告)号：JPH03130935A

公开(公告)日：1991-06-04

申请号：JP26884389

申请日：1989-10-16

Applicant: SONY CORP

Inventor： NARAHARA TATSUYA ,  KABAYA YOSHITERU ,  NAKAO TAKASHI ,  MIYOSHI HIROSHI

IPC: G11B7/00 ,  G11B7/003 ,  G11B7/08 ,  G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  G11B7/1359

Abstract: PURPOSE:To attain phase servo with high gain and high accuracy by applying servo to an image rotator based on a value sampling one analog signal with the other analog signal to be obtained from an angle detecting means. CONSTITUTION:When a signal FGS1 is made binary and loaded to a 1/2 frequency dividing period, a pulse wave is obtained with prescribed width to be determined by a monostable multivibrator 27 and when a signal FGS2 to be supplied to a sample hold circuit 28 is sampled, an output is obtained corresponding to an angular velocity phase. By adding the reference phase of a reference position circuit 30 in an adder circuit 29, a servo signal is obtained with the 1/2 angular velocity. On the other hand, a signal PGS3 is supplied to a 1/2 frequency dividing period 33 and the phase of the signal PGS is compared with that of a signal PGS4 by a phase detection circuit 34. Then, the signal PGS is supplied to a phase compensating circuit 35. When an error signal to be obtained by being supplied from a fixed contact (b) of a switch 31 to a motor M1 and a lock state by supplying the signal from a contact (c) to the motor M1 are detected by the circuit 34, the contact is switched from the (c) to the (b). Accordingly, the phase servo is switched and the servo can be applied with high accuracy and high gain.

公开(公告)号：JPH03113701A

公开(公告)日：1991-05-15

申请号：JP24835089

申请日：1989-09-25

Applicant: SONY CORP

Inventor： NARAHARA TATSUYA ,  KABAYA YOSHITERU ,  NAKAO TAKASHI ,  MIYOSHI HIROSHI

IPC: G11B5/588 ,  G11B5/02

Abstract: PURPOSE:To well execute tracking and focus servo, etc., by transmitting a control servo information signal from a rotary transformer via a modulating circuit to a control means. CONSTITUTION:The detected servo information signal obtd. in an arithmetic amplifier circuit 18 is FM-modulated in an FM modulating circuit 19 and a modulated tracking error signal is supplied to a coil 20a wound in concentrical grooves formed on a rotor 20f of the rotary transformer 20. The concentrical grooves are formed on the stator 20e of the transformer 20 as well. The tracking error signal including the DC component, i.e. the detected servo information signal, is transmitted from the coil 20a to the coil 20c on the stator 20e side by mutual induction. The tracking error signal taken out to an external circuit 21 from a rotary drum 2a on the upper side in such a manner is supplied via the amplifier circuit 22 to the FM demodulating circuit 23. The FM demodulated signal obtd. in the circuit 23 is supplied to, for example, a tape speed control circuit 24 and adder circuit 25 which control the tape traveling system of an optical tape recording and reproducing device.

公开(公告)号：JPH03100930A

公开(公告)日：1991-04-25

申请号：JP23560589

申请日：1989-09-13

Applicant: SONY CORP

Inventor： NARAHARA TATSUYA ,  KABAYA YOSHITERU ,  NAKAO TAKASHI ,  MIYOSHI HIROSHI

IPC: G11B7/00 ,  G11B7/003 ,  G11B7/09

Abstract: PURPOSE:To always form respective tracks with a constant track pitch by making respective optical heads perform tracking control with the aid of a reference surface just before starting recording and performing a recording action while holding a tracking position obtained on the reference surface. CONSTITUTION:At the point of time t1, a switching circuit SW connected to a b terminal is controlled so that an a terminal is connected to the circuit SW between t1 and t2 with a switching pulse Psw supplied from a control pulse generation part 28, while the tracking control with the aid of the reference surface 30 is executed. Reflected light of a beam which irradiates the reference surface 30 where a groove 31 is provided as a tracking reference position from the optical head X(or Y) is detected by detectors 21a and 21b and a tracking error signal et is outputted from an arithmetic operation circuit 22, then the actuator 25 is driven so that a beam spot is controlled to be on-track in a groove 31 until the point of time t2. A sampling pulse is inputted in an S/H circuit 27 just before t2 and the recording action is performed while holding the state of the actuator obtained when it is on-track in the groove 31.

公开(公告)号：JPH03100922A

公开(公告)日：1991-04-25

申请号：JP23560789

申请日：1989-09-13

Applicant: SONY CORP

Inventor： NAKAO TAKASHI ,  OSUE TADASHI ,  KUMAI SATOSHI ,  OSATO KIYOSHI ,  MIYOSHI HIROSHI

IPC: G11B7/00 ,  G11B7/003

Abstract: PURPOSE:To prevent crosstalks by widening the spacing between a track group by multispot scanning and a track group by the next multispot scanning, thereby preventing the adjacency of the tracks recorded with different heads. CONSTITUTION:Recording is so executed that the spacing between the track group TA formed by one time of scanning of an optical head A and the track group TB formed by one time of scanning of an optical head B attains pitch PN wider than the track pitch Pt with an optical tape recorder having two pieces of the heads A, B which output 5 beam spots. The pitch PN is set at about the width at which the sufficient pitch spacing remains between the adjacent tracks even if, for example, the meandering of the tracks arises. The crosstalks are thereby prevented and the accuracy requirement between the two heads A and B is relieved.