公开(公告)号：US07680016B2

公开(公告)日：2010-03-16

申请号：US11514902

申请日：2006-09-05

申请人： Ryotaro Nakagawa ,  Masanori Takahashi ,  Hideaki Funakoshi ,  Teruaki Sogawa

发明人： Ryotaro Nakagawa ,  Masanori Takahashi ,  Hideaki Funakoshi ,  Teruaki Sogawa

IPC分类号： G11B7/00

CPC分类号： G11B7/082 ,  G11B7/1275 ,  G11B7/131 ,  G11B7/22 ,  G11B2007/0006

摘要： A method for designing an optical pickup is provided. The optical pick includes a monolithic laser diode that emits a laser light beam for DVD recording and a laser light beam for CD playback, two photodetective portions, and an objective lens, for each of the emitting portions of the monolithic laser diode for emitting the DVD recording and CD playback laser light beams respectively, the specification of the error of the emission direction thereof is determined according to the following formula: |(Δθ⊥1×Δθ1×Dpd1/Dob1−Δθ⊥2×Δθ2×Dpd2/Dob2)×Kpd2|≦α, where, “1” corresponds to the DVD recording laser light beam and “2” corresponds to the CD playback laser light beam, Δθ⊥ represents the emission angle; Δθ represents the sensitivity; Dob represents the diameter of the light beam; Dpd represents the diameter of the spot formed by the light beam; Kpd represents the sensitivity; and α represents the tolerable value.

摘要翻译： 提供了一种用于设计光学拾取器的方法。 光学拾取器包括发射用于DVD记录的激光束和用于CD重放的激光束的两片光电二极管，用于发射DVD的单片激光二极管的每个发射部分的两个光电检测部分和物镜 记录和CD播放激光光束，其发射方向的误差的规格根据下式确定：|（＆Dgr;＆amp; Thetas;⊥1×＆Dgr;＆Thetas; 1×Dpd1 / Dob1-＆Dgr;＆Thetas; ⊥2×＆Dgr;＆thetas; 2×Dpd2 / Dob2）×Kpd2 |＆nlE;α，其中，“1”对应于DVD记录激光束，“2”对应于CD播放激光束，＆D; ⊥表示发射角; ＆Dgr;＆thetas; 代表灵敏度; Dob表示光束的直径; Dpd表示由光束形成的光斑的直径; Kpd代表灵敏度; α表示可容忍的值。

公开(公告)号：US20080089192A1

公开(公告)日：2008-04-17

申请号：US11871679

申请日：2007-10-12

申请人： Ryotaro NAKAGAWA ,  Teruaki Sogawa ,  Masanori Takahashi

发明人： Ryotaro NAKAGAWA ,  Teruaki Sogawa ,  Masanori Takahashi

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/0053 ,  G11B7/0908

摘要： An optical disc apparatus comprises, an optical pickup, a signal extracting unit for reading address information and an RF signal from an optical disc based on signal read by the optical pickup, and a main controller for performing jitter control and focus control. At an initial reading of the optical disc, the main controller determines whether an address information detector succeeds in reading the address information. If not successful (NO in S3), the main controller offsets a defocus position to two points in plus and minus directions from a defocus position giving best jitter (S7), calculates an approximate curve of signal level characteristics with a peak value (S8), and adjusts and allows the defocus value to correspond to this peak value (S9). If the optical disc apparatus cannot read address information, depending on the defocus value, it increases the signal level of the address information by the defocus position adjustment.

摘要翻译： 光盘装置包括：光拾取器，用于基于由光学拾取器读取的信号从光盘读取地址信息和RF信号的信号提取单元，以及用于执行抖动控制和聚焦控制的主控制器。 在初始读取光盘时，主控制器确定地址信息检测器是否成功读取地址信息。 如果不成功（S 3中为“否”），则主控制器将散焦位置偏离从提供最佳抖动的散焦位置的正负方向的两个点（S 7），计算具有峰值的信号电平特性的近似曲线（ S 8），并且调整并允许散焦值对应于该峰值（S 9）。 如果光盘装置不能读取地址信息，则根据散焦值，通过散焦位置调整来增加地址信息的信号电平。

公开(公告)号：US07206273B2

公开(公告)日：2007-04-17

申请号：US10868039

申请日：2004-06-16

申请人： Teruaki Sogawa ,  Takayuki Murakami

发明人： Teruaki Sogawa ,  Takayuki Murakami

IPC分类号： G11B7/00

CPC分类号： G11B7/22 ,  G11B7/082

摘要： An optical pickup has a base having a screw hole, a holder attached to the base, a laser diode held by the holder, a leaf spring, and an adjusting screw. The holder is formed of a substantially rectangular metal plate having short and long sides and is formed with a laser hole for fitting the laser diode through a center thereof. An angular fulcrum is formed at the center of a back surface of the holder along a direction parallel to the short side. The fulcrum is brought into abutment with the base via the leaf spring and one end of the holder is urged toward the base by the leaf spring. The holder is temporarily secured to the base by screwing the adjusting screw through an insertion hole formed at the other end of the holder into the screw hole of the base.

摘要翻译： 一种光学拾取器具有一个具有螺孔的底座，一个固定在底座上的保持架，一个保持器固定的激光二极管，一个板簧和一个调节螺钉。 保持器由具有短边和长边的大致矩形的金属板形成，并且形成有用于通过其中心安装激光二极管的激光孔。 在支架的后表面的中心沿着与短边平行的方向形成角支点。 支点通过板簧与基座抵接，保持架的一端由板簧推向基座。 通过将形成在保持架的另一端的插入孔拧入基座的螺钉孔中，将保持器暂时固定在基座上。

公开(公告)号：US20060171289A1

公开(公告)日：2006-08-03

申请号：US11344209

申请日：2006-02-01

申请人： Teruaki Sogawa ,  Jyouji Yoshioka ,  Yoshiaki Ukawa ,  Takashi Kasahara ,  Katsuichi Inoue

发明人： Teruaki Sogawa ,  Jyouji Yoshioka ,  Yoshiaki Ukawa ,  Takashi Kasahara ,  Katsuichi Inoue

IPC分类号： G11B7/24 ,  G11B5/09

CPC分类号： G11B20/1816 ,  G11B7/00458 ,  G11B7/24082 ,  G11B7/24085

摘要： With conventional test discs, changing them takes much time when a pickup is subjected to signal evaluation with respect to DVD- family discs (DVD-R and DVD-RW) and DVD+ family discs (DVD+R and DVD+RW), leading to low testing efficiency. A test disc of the invention has, formed on a single glass substrate, areas where there are provided regions where pits or no pits are formed and areas where there are provided regions where wobbles and land prepits are formed with varying parameters.

摘要翻译： 对于传统的测试光盘，当拾取器相对于DVD系列光盘（DVD-R和DVD-RW）和DVD +家庭光盘（DVD + R和DVD + RW）进行信号评估时，更换它们需要很多时间，导致 测试效率低。 本发明的测试盘在单个玻璃基板上形成有形成凹坑或不形成坑的区域的区域，其中形成有具有变化参数的摆动和焊盘预凹坑的区域。

公开(公告)号：US06985423B2

公开(公告)日：2006-01-10

申请号：US10326256

申请日：2002-12-23

申请人： Teruaki Sogawa

发明人： Teruaki Sogawa

IPC分类号： G11B7/135

CPC分类号： G11B7/13 ,  G11B7/12 ,  G11B7/22

摘要： In an optical pickup device with a defocus adjustor used for adjusting a position of a photo-sensor against an optical system, the photo-sensor is mounted on a flexible printed circuit board, and the flexible printed circuit board is fixed on a plate spring. A first end of the plate spring with the flexible printed circuit board is fixed on a fixing face of a holder. Since the fixing face of the holder is inclined and the plate spring is formed flat with no bending portion, the plate spring is warped for generating a stress when the second end of the plate spring is fixed on the holder by an adjusting screw. The position of a photo-sensing face of the photo-sensor can be fine adjusted by tightening or loosening the adjusting screw.

公开(公告)号：US20050180279A1

公开(公告)日：2005-08-18

申请号：US11053663

申请日：2005-02-09

申请人： Teruaki Sogawa ,  Nobuyuki Kimura ,  Takayuki Murakami ,  Katsuichi Inoue

发明人： Teruaki Sogawa ,  Nobuyuki Kimura ,  Takayuki Murakami ,  Katsuichi Inoue

IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/095

CPC分类号： G11B7/0903 ,  G11B7/0941 ,  G11B7/0953

摘要： In a processing section 4, allowable gain-value range defining unit 41 measures a gain value k corresponding to a level ratio between an MPP signal and an SPP signal generated by a tracking error signal generating circuit 3 to define an allowable range of the gain value, and eccentricity measuring unit 42 measures an eccentricity of an optical disk. If the eccentricity is determined to be greater than or equal to a predetermined value by eccentricity determining unit 43, gain-value defining unit 44 selects a minimum value of the gain value k to define the minimum value as a gain value k of an amplifier 37. On the other hand, if the eccentricity is determined to be less than the predetermined value, the gain-value defining unit 44 selects a central value of the gain value k to define the central value as the gain value k of the amplifier 37.

摘要翻译： 在处理部分4中，允许增益值范围定义单元41测量与由跟踪误差信号发生电路3产生的MPP信号和SPP信号之间的电平比相对应的增益值k，以限定增益值的允许范围 偏心测量单元42测量光盘的偏心度。 如果通过偏心确定单元43将偏心率确定为大于或等于预定值，则增益值定义单元44选择增益值k的最小值以将最小值定义为放大器37的增益值k 。 另一方面，如果确定偏心率小于预定值，则增益值定义单元44选择增益值k的中心值以将中心值定义为放大器37的增益值k。

公开(公告)号：US06779191B2

公开(公告)日：2004-08-17

申请号：US09732148

申请日：2000-12-07

申请人： Hideki Kume ,  Toshiharu Hibi ,  Teruaki Sogawa

发明人： Hideki Kume ,  Toshiharu Hibi ,  Teruaki Sogawa

IPC分类号： G11B3308

CPC分类号： G11B17/0284 ,  G11B17/0282 ,  G11B23/0035

摘要： A disc rotating apparatus includes a turntable for placing thereon a disc such as CD, DVD. The disc is clamped by the turntable and the disc holding frame. The holding frame is formed, at its main body, with an annular groove. The annular groove is circumferentially partitioned by a plurality of partition walls to thereby provide a plurality of accommodating portions. Each of the accommodating portions accommodates therein one or two or more steel balls. Due to rotation of the turntable or disc, each steel ball is displaced within the accommodating portion, thereby correcting for an unbalanced state wherein a center of gravity of the disc is deviated from an axis of a rotary shaft of turntable.

摘要翻译： 盘旋转装置包括用于放置诸如CD，DVD之类的盘的转台。 光盘被转盘和光盘固定框夹住。 保持框架在其主体处形成有环形槽。 环形槽由多个隔壁周向隔开，从而提供多个容纳部。 每个容纳部分容纳有一个或两个或更多个钢球。 由于转盘或盘的旋转，每个钢球在容纳部分内移位，从而校正盘的重心偏离转台旋转轴的轴线的不平衡状态。

公开(公告)号：US06764188B2

公开(公告)日：2004-07-20

申请号：US10262886

申请日：2002-10-03

申请人： Teruaki Sogawa

发明人： Teruaki Sogawa

IPC分类号： G02B7182

CPC分类号： G11B7/1362 ,  G02B7/182

摘要： An attachment part of a mirror fixture is housed in a recess part of an optical system unit and edge-like end margins of a pair of opposed engagement piece parts of the attachment part are retained on a pair of opposed walls and of the recess part in a press state. An operational piece part is extended backward from each of the engagement piece parts and housed in an operational jib insertion recess-in part 10 of the optical system unit. If the tip of an operational jig such as tweezers is inserted into the recess-in part and the operational piece parts are deformed inward, the engagement pieces parts also become deformed inward and the retention state with the walls is released.

摘要翻译： 反射镜固定件的安装部分容纳在光学系统单元的凹部中，并且连接部分的一对相对的接合件部分的边缘端部边缘保持在一对相对的壁和凹部中的凹部 新闻界。 操作件部件从每个接合件部分向后延伸并且容纳在光学系统单元的可操作的起重臂插入凹进部分10中。 如果诸如镊子的操作夹具的尖端插入到凹入部分中并且操作件部分向内变形，则接合件部分也向内变形，并且与壁的保持状态被释放。

公开(公告)号：US06683843B2

公开(公告)日：2004-01-27

申请号：US09874868

申请日：2001-06-05

申请人： Hideki Kume ,  Teruaki Sogawa ,  Takayuki Murakami

发明人： Hideki Kume ,  Teruaki Sogawa ,  Takayuki Murakami

IPC分类号： G11B2300

CPC分类号： G11B19/2009

摘要： A turntable driving device has a spindle motor 5, a bearing 7, and a wire spring 9. The spindle motor 5 has a rotation shaft 11 which is to be coupled to the turntable 3. The bearing 7 is placed on the lateral side of the rotation shaft 11, and has a pair of inclined faces 7a that are opened in the side of the rotation shaft 11 so as to sandwich the rotation shaft 11, and that are formed to be abuttable against the rotation shaft 11. The wire spring 9 is a member for urging the bearing 7 toward the rotation shaft 11.

摘要翻译： 转盘驱动装置具有主轴马达5，轴承7和线弹簧9.主轴马达5具有与转盘3连接的旋转轴11.轴承7位于 旋转轴11具有一对倾斜面7a，该倾斜面7a在旋转轴11的侧面开口以夹持旋转轴11，并形成为抵靠旋转轴11.线弹簧9 用于将轴承7推向旋转轴11的构件。

公开(公告)号：US08199623B2

公开(公告)日：2012-06-12

申请号：US12256497

申请日：2008-10-23

申请人： Teruaki Sogawa ,  Masanori Takahashi

发明人： Teruaki Sogawa ,  Masanori Takahashi

IPC分类号： G11B7/00

CPC分类号： G11B7/127 ,  G11B7/1263 ,  G11B7/13

摘要： An optical pickup includes a semiconductor laser, a beam splitter, a collimating lens, an objective lens, an aperture and a front monitor. The beam splitter splits a light beam emitted by the semiconductor laser into transmitted light and reflected light. The front monitor detects luminous energy of the transmitted light. The front monitor is disposed near an optical axis of the transmitted light so that the following is satisfied: 1≦(S×L)/(s×f)≦6.8. S is an area of an entrance pupil of the objective lens, f is an optical distance from an emission portion of the semiconductor laser to the collimating lens, s is an effective receiving area of the front monitor, and L is an optical distance from the emission portion of the semiconductor laser to the front monitor.

摘要翻译： 光拾取器包括半导体激光器，分束器，准直透镜，物镜，孔径和前监视器。 分束器将由半导体激光器发射的光束分离成透射光和反射光。 前置显示器检测透射光的光能。 前面监视器设置在透射光的光轴附近，使得满足以下条件：1＆nlE;（S×L）/（s×f）＆nlE; 6.8。 S是物镜的入射光瞳的面积，f是从半导体激光器的发射部分到准直透镜的光学距离，s是前监视器的有效接收面积，L是距离 半导体激光器的发射部分到前监视器。