公开(公告)号：JPS61138379A

公开(公告)日：1986-06-25

申请号：JP26039884

申请日：1984-12-10

Applicant: Sony Corp

Inventor： TOYODA KIYOSHI ,  ISHIDA MINORU

IPC: G06K7/015 ,  G06K7/10 ,  G11B7/00 ,  G11B7/0033

CPC classification number: G06K7/10702 ,  G06K7/015

Abstract: PURPOSE: To correct the azimuth error of an image projected on the line sensor of a subtrack by installing a cylindrical lens on an optical path between and optical recording card and the line sensor and turning it.
CONSTITUTION: The cylindrical lens 11 is disposed between an image forming lens 8 and the line sensor 10. Orthogonal coordinate systems (x), (y) and (z) are provided, and on the axis (z) the optical recording card 1, the image forming lens 8, the cylindrical lens 11 and the line sensor 10 are spaced. Then the recording face of the optical recording card, a section vertical against the optical axis of the image forming lens 8, the plane of the cylindrical lens 11 and the photodetecting face of the line sensor 10 are disposed to exist on planes (x), (y) and (z). The cylindrical lens 11 is fitted rotatably, has a drive coil on its end and can be turned by flowing a drive current to the drive coil. An azimuth error signal is amplified and supplied to the drive coil, whereby the cylindrical lens 11 is turned corresponding to the azimuth error, which can be corrected.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：通过在光记录卡和线传感器之间的光路上安装柱面透镜并转动它来校正投影在子轨道线传感器上的图像的方位误差。 构成：柱面透镜11设置在图像形成透镜8和线传感器10之间。提供正交坐标系（x），（y）和（z），并且在轴（z）上设置光记录卡1， 图像形成透镜8，柱面透镜11和线传感器10间隔开。 然后，在平面（x）上设置光记录卡的记录面，与成像透镜8的光轴垂直的部分，柱面透镜11的平面和线传感器10的光检测面， （y）和（z）。 柱面透镜11可旋转地配合，在其端部具有驱动线圈，并且可以通过使驱动电流流向驱动线圈来转动。 方位误差信号被放大并提供给驱动线圈，由此可以校正柱面透镜11对应于方位角误差，这可以被校正。

公开(公告)号：JP2009134841A

公开(公告)日：2009-06-18

申请号：JP2008001533

申请日：2008-01-08

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SAITO MASAHIRO ,  AIBA MOTOO ,  TOYODA KIYOSHI

IPC: G11B7/135 ,  G02B5/18 ,  G02B13/00 ,  G02B13/18 ,  G11B7/125

CPC classification number: G02B27/0037 ,  G02B7/008 ,  G02B7/028 ,  G02B27/4238 ,  G02B27/4283 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/13925

Abstract: PROBLEM TO BE SOLVED: To provide an objective lens capable of improving a manufacturing yield, and to provide an optical pickup device using the objective lens. SOLUTION: The optical pickup device 1 includes: the light source 3 that emits a light beam of a predetermined wavelength of about 405 nm; the objective lens 7 being a plastic lens provided with diffraction means of a zone diffractive structure suppressing generation of aberration to be caused by a temperature change, and has a numerical aperture of 0.82 or larger for gathering the light beam; and a collimator lens 6. An amount of change of third-order spherical aberration to be generated in the objective lens in response to a temperature change and an amount of change of the third-order spherical aberration to be generated in the objective lens in response to a wavelength change satisfy a predetermined relation, and when a length of an optical path increase by the diffractive structure is represented by a predetermined optical path difference function, coefficients of the second term and the tenth term of the optical path difference satisfy a predetermined relation, an amount of change of third-order axial spherical aberration and that of fifth-order axial spherical aberration in the objective lens in response to the wavelength change satisfy a predetermined relation, and the generation of the spherical aberration to be caused by the temperature change can be suppressed in the objective lens 7, and when the light beam emitted from the light source is changed in wavelength, the generation of the spherical aberration can be suppressed by moving the collimator lens 6. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 解决的问题：提供能够提高制造成品率的物镜，并提供使用该物镜的光学拾取装置。 解决方案：光学拾取装置1包括：发射约405nm的预定波长的光束的光源3; 物镜7是设置有抑制由温度变化引起的像差产生的区域衍射结构的衍射装置的塑料透镜，并且具有0.82以上的数值孔径用于收集光束; 以及准直透镜6.响应于响应于在物镜中产生的三阶球面像差的温度变化和变化的量而在物镜中产生的三阶球面像差的变化量 波长变化满足预定关系，并且当由衍射结构增加的光路的长度由预定光程差函数表示时，光程差的第二项和第十项的系数满足预定关系 响应于波长变化的物镜中的三阶轴向球面像差的变化量和五阶轴向球面像差的变化量满足预定关系，并且由温度变化引起的球面像差的产生 可以在物镜7中被抑制，并且当从光源发射的光束波长变化时， 通过移动准直透镜6可以抑制球面像差的产生。版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2007286430A

公开(公告)日：2007-11-01

申请号：JP2006114855

申请日：2006-04-18

Applicant: Sony Corp ,  Sony Deutsche Gmbh ,  ソニー ドイチュラント ゲゼルシャフト ミット ベシュレンクテル ハフツング ,  ソニー株式会社

Inventor： UEDA MITSUNORI ,  OSHIMA YOSHIHIRO ,  YAMAMOTO KAZUTOSHI ,  TOYODA KIYOSHI ,  WAJIKI ATSUHIKO ,  KATO SUKETSUGU ,  RIPOLL OLIVER M ,  TEIJIDO JUAN MANUEL

IPC: G02B5/04 ,  G02B1/11 ,  G03B21/00

CPC classification number: G02B27/149 ,  G02B27/1046 ,  G02B27/145 ,  H04N9/3105 ,  H04N9/317

Abstract: PROBLEM TO BE SOLVED: To provide a composite optical element in which the mechanical reliability and stability is improved because any void is not required therein, and to provide a projection optical apparatus which is provided with the composite optical element, is excellent in the efficiency of using light of a light source and is compact and rigid. SOLUTION: The composite optical element 41 comprises a plurality of optical elements 42, 43 and 44, wherein at least one of the optical elements is formed of the element 42 that changes an optical path and has such a constitution that the other optical elements 43, 44 are joined to the incident side surface or/and the emission side surface of the element 42 that changes the optical path via low-refractive index material layers 56A, 56B. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种复合光学元件，其中机械可靠性和稳定性得到改善，因为不需要其中的空隙，并且为了提供设置有复合光学元件的投影光学装置， 使用光源的效率并且紧凑而刚性。 解决方案：复合光学元件41包括多个光学元件42,43和44，其中至少一个光学元件由改变光路的元件42形成，并且具有这样的结构，即另一个光学元件 元件43,44通过低折射率材料层56A，56B连接到元件42的入射侧表面或/和发射侧表面，其改变光路。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2004079094A

公开(公告)日：2004-03-11

申请号：JP2002239452

申请日：2002-08-20

Applicant: Sony Corp ,  ソニー株式会社

Inventor： NAGARA TORU ,  MIYANO KYOSUKE ,  TOYODA KIYOSHI ,  HINENO SATORU

IPC: G11B7/095

Abstract: PROBLEM TO BE SOLVED: To detect radial skew highly accurately by using an optical system for recording/playing back an optical recording medium to detect the tilt and amount of the optical recording medium and to reduce cost by reducing the number of components. SOLUTION: When tracking servo is performed along a wobble groove of an optical disk 102, an optical pickup 104 for recording/reproduction is used to calculate a first push-pull signal PP1 being the output difference between light receiving parts 30b and 30c for receiving light in the central area of a reflection luminous flux RPS; and a second push-pull signal PP2 being the output difference between light receiving parts 30a and 30b and light receiving parts 30c and 30d for receiving light in the central area and peripheral area of the reflection luminous flux RPS. A phase comparator circuit 49 compares the phases of the first and second push-pull signals PP1 and PP2 to generate a skew error signal S1 including the tilt direction and the amount of tilt of the optical disk 102 from the comparison result. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：通过使用用于记录/重放光学记录介质的光学系统来高精度地检测径向歪斜，以检测光学记录介质的倾斜度和量，并且通过减少部件数量来降低成本。 解决方案：当沿着光盘102的摆动槽执行跟踪伺服时，使用用于记录/再现的光学拾取器104来计算作为光接收部分30b和30c之间的输出差的第一推挽信号PP1 用于在中心区域接收反射光通量RPS的光; 并且第二推挽信号PP2是光接收部分30a和30b之间的输出差异，以及用于在反射光束RPS的中心区域和外围区域中接收光的光接收部分30c和30d。 相位比较器电路49比较第一和第二推挽信号PP1和PP2的相位，以从比较结果产生包括倾斜方向和光盘102的倾斜量的偏斜误差信号S1。 版权所有（C）2004，JPO

公开(公告)号：JPH11185282A

公开(公告)日：1999-07-09

申请号：JP35101497

申请日：1997-12-19

Applicant: SONY CORP

Inventor： TOYODA KIYOSHI

IPC: G11B7/135

Abstract: PROBLEM TO BE SOLVED: To constitute a small-sized, light and inexpensive optical pickup with simple constitution and to record/reproduce correctly two kinds of optical disks with e.g. wavelengths and strength, etc., different from each other. SOLUTION: A light source 21 is provided with first, second light emitting elements 21a-21b arranged side by side at minute intervals on a semiconductor substrate and emitting light beams with the wavelengths different from each other, and a photodetector 25 is provided with light receiving parts respectively answering to the light beams from respective light emitting elements 21a-21b. Together with that, a light division means (phase diffraction grating) 22 diffracting only the light from one side light emitting element is provided between the light source 21 and an objective lens 24.

公开(公告)号：JPH10124951A

公开(公告)日：1998-05-15

申请号：JP27671496

申请日：1996-10-18

Applicant: SONY CORP

Inventor： NISHI NORIAKI ,  TOYODA KIYOSHI

IPC: G11B11/10 ,  G11B7/135 ,  G11B11/105

Abstract: PROBLEM TO BE SOLVED: To miniaturize the optical pickup device and to reduce the number of constituent parts and then to accurately write and read an information signal on an optical recording medium by making a light beam emitted from a semiconductor laser incident as a divergent light beam as it is upon a reflecting mirror. SOLUTION: A linearly polarized divergent light beam emitted from a semiconductor laser 1 will not give rise to a distribution of polarization directions in the light beam after being reflected by a reflecting surface of the reflecting mirror 4, provided with a reflected phase difference δP- S between a P- polarization component and an S-polarization component on this reflecting surface satisfies inequality (2n+1)π-(π/4)

公开(公告)号：JPH09161305A

公开(公告)日：1997-06-20

申请号：JP32324595

申请日：1995-12-12

Applicant: SONY CORP

Inventor： TOYODA KIYOSHI

IPC: G11B7/135

Abstract: PROBLEM TO BE SOLVED: To lengthen an optical path length of laser light and to reduce a noise level due to return laser light by arranging a planar light refraction member refracting laser light between a laser oscillator and an objective lens. SOLUTION: The laser light L is oscillated from a laser diode 1. Then, the laser light L is made incident on a glass plate 10 through a grating 4 and a beam splitter 5 to be made incident on the objective lens 3 after it is refracted. Then, the laser light L is converged on a recording layer of a magneto-optical disk 100 at a required spot by the objective lens 3 of a limited magnification, and the recording layer of the magneto-optical disk 100 is magnetically inverted, and information is recorded on the magneto-optical disk 100. In such a manner, a noise is suppressed by a sheet of inexpensive glass plate 10 without using an expensive collimate lens formed by combining plural lenses by this optical pickup.

公开(公告)号：JPH08203150A

公开(公告)日：1996-08-09

申请号：JP3151795

申请日：1995-01-27

Applicant: SONY CORP

Inventor： NISHI NORIAKI ,  SAITO KIMIHIRO ,  TOYODA KIYOSHI

IPC: G11B11/10 ,  G11B7/135 ,  G11B11/105

Abstract: PURPOSE: To miniaturize a magneto-optical recording medium reproducing device by arranging a polarization rotation distribution converting means for changing the distribution of the polarization direction of the divergent and convergent light transmitted as to cancel the polarization rotation distribution by an optical means for the divergent and convergent light onto the optical path for the divergent and convergent light. CONSTITUTION: A phase plate 51 is arranged in the position behind a polarization beam splitter 4 on the optical path for the reflected return light L2 from a magneto-optical disk 7. The deflection angle θ of the optical axis K50 of the phase plate 51 is selected so that the rationally polarized light generated in the reflected return light L2 is cancelled by the transmission of the reflected return light L2 through a polarization beam splitter 4 within the plane formed by the optical axis of the incident reflected return light L2 and the polarization plane 4A of the polarization beam splitter 4. Then, an optical pickup 50 of an S separation type capable of making the reflected return light L2 free from the influence of the polarization rotation by the polarizing film 4A of the polarization beam splitter 4 incident on the photodetecting surface of a photodetector 10 and producing exact MO signals is obtd.

公开(公告)号：JPH08147742A

公开(公告)日：1996-06-07

申请号：JP31407694

申请日：1994-11-24

Applicant: SONY CORP

Inventor： TOYODA KIYOSHI ,  UEDA MITSUNORI

IPC: G11B11/10 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135 ,  G11B11/105

Abstract: PURPOSE: To provide a small and highly reliable laser coupler applicable to a magnetooptical disk and to provide an optical pickup using the same. CONSTITUTION: In a laser coupler 50, photodetectors 57, 58 are formed on a first semiconductor substrate 51 and a laser diode chip 53 is formed on a second semiconductor substrate 52 mounted on the first semiconductor substrate 51. The surface, on which the PBS film 59 of a half wavelength plate 55 as a polarizing splitter film is formed, is stuck to the first semiconductor substrate 51 and BS 54 composing a composite prism 56 together with the half wavelength plate 55 is mounted on the half wavelength plate 55. The BS 54 has an optical path branching surface for branching the optical path of a laser beam transmitted from the laser diode chip 53 and the laser beam entered into the composite prism 56 from the optical path branching surface is projected on the photodetectors 57, 58 from the surface on which the PBS film 59 of a half wavelength plate 55 is formed.

公开(公告)号：JPH05149747A

公开(公告)日：1993-06-15

申请号：JP31490991

申请日：1991-11-28

Applicant: SONY CORP

Inventor： TOYODA KIYOSHI ,  HASHIMOTO TAKAMASA ,  FUJITA GORO

IPC: G01C3/06 ,  G11B5/02 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To enable a stage difference to be formed equivalently even if there are no stage differences after two photodetector elements which are placed sandwiching a light-emitting element are actually placed in parallel for a disk surface of a magnetooptical disk. CONSTITUTION:A photodetector 7 and a photodetector 8 are placed within a same plane which is in parallel to a disk surface 4. A convex lens 21 which scatters a scattering light L4 reflected by the disk surface 4 due to lighting from a light-emitting element 6 is placed at a light-reception path of the photodetector 8. When the light-emitting element 6 is placed within a focusing distance of the convex lens 21, scattering light which is scattered by the convex lens 21 is irradiated from an imaginary position of the light-emitting element 6, namely the photodetector 8 is moved away from the light-emitting element 6 by an equivaentl distance 1 {(1=a.a/(f-a): a; light-path length between the convex lens 21 and the light-emitting element 6, f; focusing distance of the convex lens 21}.