公开(公告)号：US08018799B2

公开(公告)日：2011-09-13

申请号：US12084260

申请日：2006-09-19

申请人： Daisuke Matsubara ,  Masahisa Shinoda

发明人： Daisuke Matsubara ,  Masahisa Shinoda

IPC分类号： G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/1275 ,  G11B7/1353 ,  G11B2007/0006

摘要： An optical pickup device is provided. The optical pickup device includes a first, second, and third light emitting portions emitting light beams having first, second, and third wavelengths, respectively; an adjusting element for optical axes enabled to control the optical axis of the return light beam reflected by the optical recording media after output from the light emitting portion, and a single photo detector receiving the return light beams passing through the adjusting element for optical axes. The first light emitting portion and the second light emitting portion are arranged in such a way that the optical axis of the first light beam and the optical axis of the third light beam approximately coincide with each other. The adjusting element for optical axes controls the axis of the return light beam of said second light beam and the single photo detector receives the return light beams of the first light beam, the second light beam and the third light beam.

摘要翻译： 提供一种光拾取装置。 光拾取装置包括分别发射具有第一，第二和第三波长的光束的第一，第二和第三发光部分; 用于光轴的调节元件，能够控制从发光部分输出之后由光学记录介质反射的返回光束的光轴，以及接收通过光轴调整元件的返回光束的单个光电检测器。 第一发光部分和第二发光部分被布置成使得第一光束的光轴和第三光束的光轴彼此大致一致。 用于光轴的调节元件控制所述第二光束的返回光束的轴线，并且单个光电检测器接收第一光束，第二光束和第三光束的返回光束。

公开(公告)号：US08077581B2

公开(公告)日：2011-12-13

申请号：US12367392

申请日：2009-02-06

申请人： Masahisa Shinoda

发明人： Masahisa Shinoda

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/1378 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup has a semiconductor laser device that can emit laser beams with different wavelengths. A beam splitter and objective lens direct the emitted beam onto a rotating optical disc. Reflected light returns through the objective lens and beam splitter to a photodetector. A pair of liquid crystal elements on the optical path from the optical disc to the photodetector have controllable lens functions acting in different directions to produce an adjustable astigmatic effect that enables the photodetector to generate a focus error signal with a linear range appropriate for the type of optical disc, the number of signal layers in the optical disc, and the spacing between the layers.

摘要翻译： 光拾取器具有能够发射不同波长的激光束的半导体激光器件。 分束器和物镜将发射的光束引导到旋转的光盘上。 反射光通过物镜和分束器返回到光电检测器。 在从光盘到光电检测器的光路上的一对液晶元件具有可操作的透镜功能，其作用在不同的方向上以产生可调节的散光效果，使得光电检测器能够产生具有适合于 光盘，光盘中的信号层的数量以及层之间的间隔。

公开(公告)号：US20100097917A1

公开(公告)日：2010-04-22

申请号：US12513616

申请日：2008-02-19

申请人： Masahisa Shinoda ,  Daisuke Matsubara ,  Kenya Nakai ,  Hironori Nakahara

发明人： Masahisa Shinoda ,  Daisuke Matsubara ,  Kenya Nakai ,  Hironori Nakahara

IPC分类号： G11B7/00

CPC分类号： G02B5/1861 ,  G02B5/1819 ,  G02B5/1842 ,  G02B26/0808 ,  G11B7/1353 ,  G11B7/1381 ,  G11B2007/0006

摘要： An optical pickup with a simplified structure in which, according to the type of optical disc, diffracted light from three types of laser light can be directed efficiently onto a photodetector and appropriate focus control can be performed based on the signals detected by the photodetector, and a diffractive optical element that can be used in the optical pickup, which has a semiconductor laser 10 that can emit three types of laser light, a diffractive optical element 42 that diffracts the laser light reflected from the optical disc 31, and a single photodetector 43 that detects the diffracted light exiting the diffractive optical element 42. The diffractive optical element 42 is structured so that 0-order light is the maximal component of the diffracted light generated from each of two of three types of laser light, the two having close wavelengths (with a small wavelength difference), and +1-order light or −1-order light is the maximal component of the diffracted light generated from the remaining one type of laser light.

摘要翻译： 具有简化结构的光学拾取器，其中根据光盘的类型，可以将来自三种类型的激光的衍射光有效地引导到光电检测器上，并且可以基于由光电检测器检测的信号执行适当的聚焦控制，以及 可以用于具有能够发射三种激光的半导体激光器10的光学拾取器中的衍射光学元件，衍射从光盘31反射的激光的衍射光学元件42和单个光电检测器43 它检测离开衍射光学元件42的衍射光。衍射光学元件42被构造成使得0级光是从三种类型的激光中的两种中的两种中的每一种产生的衍射光的最大分量，其中两个具有接近的波长 （具有小的波长差），+ 1次光或-1次光是衍射光产生的最大分量fr 剩下的一种类型的激光。

公开(公告)号：US20090201785A1

公开(公告)日：2009-08-13

申请号：US12367392

申请日：2009-02-06

申请人： Masahisa SHINODA

发明人： Masahisa SHINODA

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/1378 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup has a semiconductor laser device that can emit laser beams with different wavelengths. A beam splitter and objective lens direct the emitted beam onto a rotating optical disc. Reflected light returns through the objective lens and beam splitter to a photodetector. A pair of liquid crystal elements on the optical path from the optical disc to the photodetector have controllable lens functions acting in different directions to produce an adjustable astigmatic effect that enables the photodetector to generate a focus error signal with a linear range appropriate for the type of optical disc, the number of signal layers in the optical disc, and the spacing between the layers.

摘要翻译： 光拾取器具有能够发射不同波长的激光束的半导体激光器件。 分束器和物镜将发射的光束引导到旋转的光盘上。 反射光通过物镜和分束器返回到光电检测器。 在从光盘到光电检测器的光路上的一对液晶元件具有可操作的透镜功能，其作用在不同的方向上以产生可调节的散光效果，使得光电检测器能够产生具有适合于 光盘，光盘中的信号层的数量以及层之间的间隔。

公开(公告)号：US20090078857A1

公开(公告)日：2009-03-26

申请号：US11886588

申请日：2006-04-24

申请人： Daisuke Matsubara ,  Masahisa Shinoda

发明人： Daisuke Matsubara ,  Masahisa Shinoda

IPC分类号： H01J40/14 ,  H01S5/00 ,  G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/1275 ,  G11B7/13 ,  G11B2007/0006

摘要： A laser emitting device (9) includes a light emitting portion (4) that emits light of a wavelength λ1 (approximately 405 nm), a light emitting portion (5) that emits light of a wavelength λ2 (approximately 650 nm), and a light emitting portion (6) that emits light of a wavelength λ1 (approximately 780 nm). The light emitting position of the light emitting portion (4) and the light emitting position of the light emitting portion (6) are approximately on the same position as seen in the direction of an optical axis of emitted light of the laser emitting device (9). An optical axis adjusting element (18) is provided for adjusting an optical axis of return light of at least one of the wavelengths among return lights of the wavelengths λ1, λ2 and λ3 so that respective return lights emitted by the light emitting portions (4, 5 and 6) of the laser emitting device (9) and reflected by an optical recording medium (16) are received by a common light detector (20).

摘要翻译： 激光发射装置（9）包括发射波长λ1（约405nm）的光的发光部分（4），发射波长λ2（约650nm）的光的发光部分（5），以及 发射波长λ1（约780nm）的光的发光部分（6）。 发光部分（4）的发光位置和发光部分（6）的发光位置大致处于与激光发射装置（9）的发射光的光轴方向相同的位置 ）。 提供光轴调节元件（18），用于调节波长λ1，λ2和λ3的返回光中至少一个波长的返回光的光轴，使得由发光部分（4， 激光发射装置（9）的反射光（5）和（6）被光记录介质（16）反射，由公共光检测器（20）接收。

公开(公告)号：US07266072B2

公开(公告)日：2007-09-04

申请号：US10976811

申请日：2004-11-01

申请人： Masahisa Shinoda ,  Kenya Nakai

发明人： Masahisa Shinoda ,  Kenya Nakai

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/082 ,  G11B7/22 ,  H01S5/02212 ,  H01S5/02268 ,  H01S5/02296 ,  H01S5/4031 ,  H01S5/4087

摘要： A semiconductor laser unit includes a plurality of semiconductor laser elements arranged parallel with one another in a laser beam-emitting direction, and a base for positioning and fixing the plurality of semiconductor laser elements. The plurality of semiconductor laser elements are arranged such that a laser beam emitted from the semiconductor laser element greatest in astigmatism, of the plurality of semiconductor laser elements, is coincident in its axis with a reference axis of the base. In the case that the semiconductor laser unit is arranged on an optical head device, the focusing characteristic on the plurality of laser beams can be improved.

摘要翻译： 半导体激光单元包括在激光束发射方向上彼此平行布置的多个半导体激光元件和用于定位和固定多个半导体激光元件的基底。 多个半导体激光元件被布置成使得从多个半导体激光元件中以散光最大的半导体激光元件发射的激光束在其轴线与基座的参考轴线重合。 在半导体激光单元配置在光学头装置上的情况下，可以提高多个激光束的聚焦特性。

公开(公告)号：US5511048A

公开(公告)日：1996-04-23

申请号：US361478

申请日：1994-12-22

申请人： Mitsuru Irie ,  Takeshi Utakouji ,  Morihiro Karaki ,  Nobuo Takeshita ,  Manabu Koike ,  Yasuyuki Satou ,  Naoyuki Egusa ,  Masahisa Shinoda ,  Akira Ishimori ,  Akihiro Shima ,  Shigenori Yagi

发明人： Mitsuru Irie ,  Takeshi Utakouji ,  Morihiro Karaki ,  Nobuo Takeshita ,  Manabu Koike ,  Yasuyuki Satou ,  Naoyuki Egusa ,  Masahisa Shinoda ,  Akira Ishimori ,  Akihiro Shima ,  Shigenori Yagi

IPC分类号： G11B11/10 ,  G11B7/125 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B7/125 ,  G11B11/10504 ,  G11B11/10532 ,  G11B11/10595

摘要： The second harmonic wave of a solid laser light which is emitted from a second harmonic wave light source is divided into a plurality of laser beams by a diffraction grating. The divided laser beams are converged on a record carrier into a plurality of light spots by an optical head. Magnetic field generating coils for applying magnetic fields to the respective light spots in accordance with the recording signals from a signal line are disposed under the record carrier. Part of the solid laser light is reflected and input to a beam splitter. Since part of the light input to the beam splitter is taken out, a stabilizer controls the output of the solid laser light from the second harmonic wave light source, parallel recording/reproduction using the plurality of light spots which are arranged on the record carrier is enabled and the formation of the plurality of light spots is effectively controlled. Thus, a magneto-optical recording and reproducing apparatus which is capable of high-density recording and high-speed data transfer, which supplies a stable and accurate optical output, and which facilitates the control of the optical output is provided.

摘要翻译： 从二次谐波光源发射的固体激光的二次谐波通过衍射光栅被分成多个激光束。 分割的激光束通过光学头被会聚在记录载体上成多个光点。 根据来自信号线的记录信号将磁场施加到各个光点的磁场产生线圈设置在记录载体下方。 固体激光的一部分被反射并输入到分束器。 由于输入到分束器的光的一部分被取出，所以稳定器控制来自二次谐波光源的固体激光的输出，使用布置在记录载体上的多个光点进行并行记录/再现 并且有效地控制多个光点的形成。 因此，提供了能够进行高密度记录和高速数据传送的磁光记录和再现装置，其提供稳定且准确的光输出，并且有助于光输出的控制。

公开(公告)号：US5434834A

公开(公告)日：1995-07-18

申请号：US321876

申请日：1994-10-14

申请人： Masahisa Shinoda ,  Kenjiro Kime ,  Toshiya Matozaki ,  Keiji Nakamura ,  Toru Yoshihara ,  Takeshi Ito

发明人： Masahisa Shinoda ,  Kenjiro Kime ,  Toshiya Matozaki ,  Keiji Nakamura ,  Toru Yoshihara ,  Takeshi Ito

IPC分类号： G11B7/09

CPC分类号： G11B7/0938 ,  G11B7/0904 ,  G11B7/094

摘要： An optical recording and reproducing apparatus uses a laser to form one or more spots on an information recording medium preformatted with wobbling guide grooves, and detects tracking error. If the differential push-pull method of detecting tracking error is used, a center spot is flanked by satellite spots distant by an odd multiple of half the repeating period of tile wobble. If the three-beam method is used, the distance is an odd multiple of one-fourth the repeating period of the wobble. If the push-pull method is used, a split photodetector generates a pair of electrical signals. The sum and difference of these signals are filtered, then synchronously detected, and the result is combined with the difference signal to generate a corrected tracking error signal.

摘要翻译： 光学记录和再现装置使用激光器在预先格定有摆动引导槽的信息记录介质上形成一个或多个点，并且检测跟踪误差。 如果使用检测跟踪误差的差分推挽方法，则中心点位于远离瓦片摆动的重复周期的一半的奇数倍的卫星点。 如果使用三光束方式，距离是摆动重复周期的四分之一的奇数倍。 如果使用推挽方法，则分离光电检测器产生一对电信号。 这些信号的和差被滤波，然后同步检测，结果与差分信号相结合，产生校正的跟踪误差信号。

公开(公告)号：US5130965A

公开(公告)日：1992-07-14

申请号：US544995

申请日：1990-06-27

申请人： Morihiro Karaki ,  Yasuyuki Satou ,  Masahisa Shinoda

发明人： Morihiro Karaki ,  Yasuyuki Satou ,  Masahisa Shinoda

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/09

CPC分类号： G11B7/0903

摘要： An optical recording/reproducing apparatus capable of detecting recording defects on an information recording medium comprises a beam irradiation device for irradiating a first beam, by which information pits are recorded on/reproduced from the information track on the information recording medium, a second beam preceding the first beam and a third beam following the first beam, along the information track; an optical detector having a plurality of light receiving surfaces for individually detecting the reflected light of the first beam, the second beam and the third beam, which have been reflected from the information recording medium; a monitoring device for, in a recording mode, monitoring the condition of the information track prior to and after recording in response to amount-of-light signals which respectively correspond to the reflected light of the second beam and the third beam; and a signal generator for, in a reproducing mode, producing a tracking error signal in response to the amount-of-light signals. The optical recording/reproducing apparatus is characterized in that the beam irradiation device includes a light spot switching device for changing the light spot locations of the second beam and the third beam on the information recording medium, depending upon the recording mode or the reproducing mode.

摘要翻译： 能够在信息记录介质上检测记录缺陷的光记录/再现装置包括：用于照射第一光束的光束照射装置，信息记录介质上的信息轨迹记录在信息记录媒体上/从再现的信息坑;第二光束 所述第一光束和所述第一光束之后的第三光束沿着所述信息轨道; 光检测器，具有多个光接收表面，用于分别检测已从信息记录介质反射的第一光束，第二光束和第三光束的反射光; 用于响应于分别对应于第二光束和第三光束的反射光的光量信号而在记录模式之前和之后监视信息轨迹的状态的监视装置; 以及信号发生器，用于在再现模式下，响应于光量信号产生跟踪误差信号。 光记录/重放装置的特征在于，束照射装置包括一个光点切换装置，用于根据记录模式或再现模式改变信息记录介质上的第二光束和第三光束的光点位置。

公开(公告)号：US4942584A

公开(公告)日：1990-07-17

申请号：US368034

申请日：1989-06-16

申请人： Morihiro Karaki ,  Masahisa Shinoda ,  Yasuyuki Satou

发明人： Morihiro Karaki ,  Masahisa Shinoda ,  Yasuyuki Satou

IPC分类号： H01S5/00 ,  H01S5/022 ,  H01S5/0683 ,  H01S5/40

CPC分类号： H01S5/0014 ,  H01S5/02212 ,  H01S5/02248 ,  H01S5/0683 ,  H01S5/4031

摘要： In a semiconductor laser apparatus driving system, forward or/and backward beams from a plurality of semiconductor laser beam sources are detected, and arithmetic operations are provided for the detection outputs to determine the light outputs of the respective ones of the semiconductor laser beam sources. The use of a condenser lens which has been used in conventional system is eliminated and, as a result, precise positioning of such lens is avoided, and the semiconductor laser apparatus driving system can be mass-produced.

摘要翻译： 在半导体激光装置驱动系统中，检测来自多个半导体激光束源的正向或反向光束，并且为检测输出提供算术运算以确定各个半导体激光束源的光输出。 消除了在常规系统中使用的聚光透镜，结果避免了这种透镜的精确定位，并且可以批量生产半导体激光装置驱动系统。