公开(公告)号：JPH09231601A

公开(公告)日：1997-09-05

申请号：JP5678896

申请日：1996-02-20

Applicant: SONY CORP

Inventor： NISHI NORIAKI ,  SAITO KIMIHIRO ,  MORIMOTO TADASHI ,  UEDA MITSUNORI ,  KUBO TAKESHI ,  MATSUO NORIMASA ,  HORIE KAZUYOSHI ,  SATO YURIKO ,  SHINO KUNINORI

IPC: G02B5/04 ,  G11B7/13 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To make an optical pickup small size and light weight and also high reliable by casting a light beam made to enter a prism from a branching point of an optical path to the light receiving element from a surface formed with a semitransmission film. SOLUTION: The light emitting and receiving elements 21 and the optical pickup 20 using them are formed integrally with the prism 28 by its double refeaction material. As a result, return light from a magnetooptical disk MO is incident on the prism 28 and is splitted, and also these light beams reflected by the semitransmission film 31 formed on the bottom are reflected by the upper surface of the prism 28 based on a difference of refractive index between the double refractive material constituting the prism 28 and the open air. Then, the beams are guided to the bottom surface of the prism 28 and are incident upon 2nd and 3rd photodetectors. Therefore, it is not necessary to provide a total reflection film on the upper surface of the prism 28, and hence miniaturization and reduction in weight are feasible.

公开(公告)号：JPH0969245A

公开(公告)日：1997-03-11

申请号：JP18135196

申请日：1996-06-22

Applicant: SONY CORP

Inventor： NISHI NORIAKI ,  SAITO KIMIHIRO ,  MATSUMOTO SHUICHI ,  HATTORI MASATO ,  MORIMOTO TADASHI ,  UEDA MITSUNORI ,  KUBO TAKESHI ,  MATSUO NORIMASA ,  HORIE KAZUYOSHI ,  SATO YURIKO ,  SHINO KUNINORI

IPC: G11B11/10 ,  G11B11/105

Abstract: PROBLEM TO BE SOLVED: To miniaturize a device and improve detecting accuracy by providing a semiconductor substrate having a photo-detector group and a polarization separating element in an optical pickup. SOLUTION: Light receiving elements PD1-PD3, a light emitting element LD for emitting light rays on a magneto-optical-signal recording medium and a polarization separating element 43 are mounted on a semiconductor substrate 42, and an optical pickup is constituted. The polarization separating element 43 comprises a double-refraction type single body, receives the returning light of the light rays reflected from the magneto-optical recording medium, separates the returning light and guides the light to the specified positions of the light receiving elements PD1, PD2 and PD3. Thus, the returning light reflected from the magneto-optical signal recording medium is securely separated into the direction determined by the optical axis of the double-refraction type material single body. Therefore, the improvement of accuracy and the compact production of the device are made possible.

公开(公告)号：JP2009259367A

公开(公告)日：2009-11-05

申请号：JP2008110298

申请日：2008-04-21

Applicant: Sony Corp ,  ソニー株式会社

Inventor： ISHII TAMOTSU ,  MATSUO NORIMASA ,  MATSUO YASUYUKI

IPC: G11B7/135

Abstract: PROBLEM TO BE SOLVED: To stabilize the recording and reproducing property of an optical disk by a small constitution. SOLUTION: A stray light beam L14 reflected by a dichroic beam splitter plate 28 is reflected by a wavelength selective beam splitter 26, and a stray light beam L15 consisting of diffusing light is emitted to a front photodetector 30. Accordingly, the stray light beam L15 of a light quantity markedly smaller than that of a light beam L12F is emitted. Thus, the light beam L12F emitted to the front detector 30 can properly be detected, so that the recording and reproducing property of the optical disk 100D can be stabilized by the small constitution. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：通过小的结构来稳定光盘的记录和再现性能。 解决方案：由二向色分束板28反射的杂散光束L14被波长选择性分束器26反射，并且由漫射光组成的杂散光束L15被发射到前光电检测器30。因此，杂散 发出明显小于光束L12F的光量的光束L15。 因此，可以适当地检测发射到前检测器30的光束L12F，从而可以通过小的结构来稳定光盘100D的记录和再现特性。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2005267795A

公开(公告)日：2005-09-29

申请号：JP2004081029

申请日：2004-03-19

Applicant: Sony Corp ,  ソニー株式会社

Inventor： ABE TSUGUHIRO ,  TSUJINAKA MASATO ,  MATSUO NORIMASA

IPC: G11B7/135 ,  G11B7/00 ,  G11B7/125 ,  H01S5/022

CPC classification number: G11B7/126 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To provide an optical pickup and an optical recording medium recording and reproducing apparatus in which compatibility of shortening optical path length and reducing return light noise caused by an interference of return light can be performed and miniaturizing, thinning, and weight-lightening can be realized. SOLUTION: Laser noise (return light noise) caused by that an outgoing laser beam is subjected to the interference by return light in which one part of light focused on a recording plane of a disk is moved backward in an outward path optical system and returned to a semiconductor laser is reduced by deciding a range of air conversion optical path length L of an optical system outward path whole system from a laser light emitting point to a disk type recording medium surface by i(n 0 ×d)+ΔL/2 0 ×d)-ΔL/2 (then, i: arbitrary integer) where, resonator length of semiconductor laser: d, active layer refractive index of semiconductor laser: n 0 , allowable plane deviation quantity in disk type recording medium standard:ΔL. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 解决的问题：提供一种光拾取器和光记录介质记录和再现装置，其中可以执行缩短光路长度和由返回光的干涉引起的减少返回光噪声的兼容性并且小型化，变薄化， 并且可以实现减重。 解决方案：由输出激光束引起的激光噪声（返回光噪声）受到其中聚焦在盘的记录平面上的一部分光在向外路径光学系统中向后移动的返回光的干扰 通过将激光发光点到光盘型记录介质表面的光学系统向外路径整体的空气转换光路长度L的范围决定为i（n 0 < SB>×d）+ΔL/ 2 0 ×d）-ΔL/ 2（然后，i：任意整数）其中，半导体激光器的谐振器长度： d，半导体激光器的有源层折射率：n 0 ，盘式记录介质的容许平面偏差量标准：ΔL。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2003007010A

公开(公告)日：2003-01-10

申请号：JP2001379079

申请日：2001-12-12

Applicant: Sony Corp ,  ソニー株式会社

Inventor： KURITA KAZUHITO ,  TOMOTO KAZUTAKA ,  MATSUO NORIMASA

IPC: G11B7/085 ,  G11B11/105 ,  G11B21/02

CPC classification number: G11B21/02 ,  G11B7/08582 ,  G11B11/10571

Abstract: PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a recording and/or reproducing apparatus by simplifying the structure of the apparatus and also to achieve further downsizing and power saving.
SOLUTION: This recording and/or reproducing apparatus is provided with: a recording and reproducing mechanism 7 for performing the recording and reproduction of information signal to the magneto-optical disk 3 housed rotatably in a disk cartridge 2; a supporting base 19 on which the recording and reproducing mechanism 7 is mounted; and an impact driving mechanism 8 for sliding a movable part 27 in the axial direction of a driving shaft 24 together with the supporting base 19 by displacing the driving shaft 24 in the axial direction while expanding or contracting an electromechanical sensing element 25 is accordance with driving pulses. The recording and reproducing mechanism 7 and the impact driving mechanism 9 are arranged in an area where opening parts 4a, 4b of the disk cartridge 2 making part of the magneto- optical disk 3 face to the outside over the in- and outside of its circumference are projected.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：通过简化装置的结构并且还实现进一步的小型化和省电，以减少记录和/或再现装置的制造成本。 解决方案：该记录和/或再现装置设有：记录和再现机构7，用于对可旋转地容纳在盘盒2中的磁光盘3执行信息信号的记录和再现; 安装记录和再现机构7的支撑基座19; 并且通过使驱动轴24沿轴向移动同时使电动机械传感元件25伸长或收缩而使可动部27在驱动轴24的轴向上与支撑基座19一起滑动的冲击驱动机构8与驱动 脉冲。 记录和再现机构7和冲击驱动机构9布置在使得磁光盘3的一部分的盘盒2的开口部分4a，4b在其外周的外侧面向外部的区域中 被投射。

公开(公告)号：JPH11175974A

公开(公告)日：1999-07-02

申请号：JP33591097

申请日：1997-12-05

Applicant: SONY CORP

Inventor： MATSUO NORIMASA

IPC: G11B7/00 ,  G11B7/0045

Abstract: PROBLEM TO BE SOLVED: To simplify constitution, to easily control an output and a gain and to switch smoothly, rapidly and excellently a recording mode with a reproducing mode in a recording/reproducing device switching the output of a light source and amplifier gain of an optical detection output in the recording mode with in the reproducing mode. SOLUTION: Although optical power of a laser diode is switched, and the gain of a preamplifier amplifying the optical detection output from a photodiode is switched at the time of switching the recording mode with the reproducing mode, at the recording mode time, a delayed EFM signal adding a prescribed delay to light emission of a laser beam answering to an EFM signal to be recorded is generated, and a sampling pulse Sp for servo sampling is generated based on this delayed EFM signal. Thus, instabilization in focus, tracking servos due to disturbance in laser beam power and the preamplifier gain are evaded at the time of switching recording/reproducing.

公开(公告)号：JPH1049906A

公开(公告)日：1998-02-20

申请号：JP20218696

申请日：1996-07-31

Applicant: SONY CORP

Inventor： MATSUO NORIMASA

IPC: G11B7/135

Abstract: PROBLEM TO BE SOLVED: To avoid an effect due to stray light and to read an information signal on an optical medium with excellent sensitivity by subtracting an offset signal proportionating to an output voltage of an optical output detector from an output signal of a current/voltage amplifier on a semiconductor substrate. SOLUTION: In the read mode of the information signal from a magneto- optical disk (MO disk), outputs due to the stray light in respective light receiving parts of respective signal reading photodetectors 4, 5 are subtracted from photodetective outputs from respective light receiving surfaces of the photodetectors 4, 5 as offset voltages. By operation of such a control circuit, respective photodetective signals a, b, c, d, x1, y1, x2, y2 are outputted from respectively corresponding output terminals. Further, in the information read mode from an optical disk 101, the reflectance of the signal recording surface of the disk 101 is nearly twice. Then, the outputs due to the stray light of respective light receiving parts of the photodetectors 4, 5 are subtracted from the photodetective outputs of the photodetectors 4, 5.

公开(公告)号：JP2004259836A

公开(公告)日：2004-09-16

申请号：JP2003047115

申请日：2003-02-25

Applicant: Sony Corp ,  ソニー株式会社

Inventor： MATSUO NORIMASA

IPC: G11B7/125 ,  G11B7/13 ,  G11B7/135 ,  H01L31/0232 ,  H01S5/022

Abstract: PROBLEM TO BE SOLVED: To provide a light receiving and emitting device which is favorable on restraining influence of spurious radiation of a high frequency superposition circuit while attaining miniaturization, cost reduction, and low consumption power, and to provide an optical head and optical disk equipment. SOLUTION: The light receiving and emitting device 10 is provided with a semiconductor substrate 12, a light emitting element 16, a first or a third light receiving elements 18A, 18B, 18C, a prism 20, an IV converting circuit 22, and a high frequency superposition circuit 24. The respective light receiving elements 18A, 18B, 18C, the IV converting circuit 22, and the high frequency superposition circuit 24 are formed in the substrate 12. The high frequency superposition circuit 24 superposes a high frequency signal on a driving signal supplied to a light emitting element 16 and supplies the high frequency signal to a light emitting element 16. An isolation band 40 is formed so as to surround the respective light receiving elements 18A, 18B, 18C and the IV converting circuit 22. An isolation band 40 is formed so as to surround the high frequency superposition circuit 24. COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2004079045A

公开(公告)日：2004-03-11

申请号：JP2002235918

申请日：2002-08-13

Applicant: Sony Corp ,  ソニー株式会社

Inventor： MATSUO NORIMASA ,  SHINODA SOSUKE ,  MORIKAWA TORU ,  SHIOURA KUNIHIRO

IPC: G11B21/02 ,  G11B7/085

Abstract: PROBLEM TO BE SOLVED: To provide a device and a method for reproduction for stably driving an object to be driven without deteriorating driving characteristics. SOLUTION: This device is provided with an electromechanical transducer 25 attached to one end of a drive shaft 24 and elongated/contracted in the axial direction of the drive shaft 24 to displace the drive shaft 24 in its axial direction; an object 28 to be driven which moves along the drive shaft 24; an information reading part arranged on the body 28 to be driven to read information from a disk recording medium; a discharge mechanism 27 which is fixed to the end of the drive shaft opposite to the end where the electromechanical transducer 25 is fixed and which moves the object 28 to be driven along the drive shaft 24 to discharge collected foreign objects; a driving voltage application section for applying driving voltage to the electric mechanical conversion element 25; a signal generation section for generating a discharge driving signal for discharge-driving the object 28 to be driven; and a control section for controlling the driving voltage application section according to the input of the discharge driving signal. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2003189642A

公开(公告)日：2003-07-04

申请号：JP2001390183

申请日：2001-12-21

Applicant: SONY CORP

Inventor： KURITA KAZUHITO ,  MATSUO NORIMASA

IPC: H01L41/09 ,  H02N2/00

Abstract: PROBLEM TO BE SOLVED: To reduce power consumption of a recording and/or reproducing device. SOLUTION: The drive device is provided with a drive shaft 24, an electromechanical conversion element 25 which, fitted to one end of the drive shaft 24, expands/contracts in the axial direction of the drive shaft 24 according to a drive voltage to displace the drive shaft 24 in the axial direction, and an optical pickup 14 which, movably supported in the axial direction of the drive shaft 24, moves along the drive shaft 24 when the drive shaft 24 is displaced by the electromechanical conversion element 25. At rise of the drive voltage, an expansion/contraction start voltage of the electromechanical conversion element is applied steeply before a voltage that gradually increases is applied, while a voltage that steeply falls is applied at the fall of the drive voltage, to control the electromechanical conversion element 25. COPYRIGHT: (C)2003,JPO