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41. 发明授权

US5159589A Optical recording and/or reproducing apparatus 失效
标题翻译：光学记录和/或复制设备
公开(公告)号：US5159589A
公开(公告)日：1992-10-27
申请号：US646728
申请日：1991-01-31
申请人： Kiyoshi Ohsato
发明人： Kiyoshi Ohsato
IPC分类号： G11B7/095 , G11B7/09
CPC分类号： G11B7/0903 , G11B7/094
摘要： An optical recording and/or reproducing apparatus by which a main and two auxiliary light beams are caused to impinge upon a disc. Two auxiliary spots are formed on the disc by two auxiliary light beams to be distant by a quarter of a track pitch from a main spot formed on the disc by the main light beam respectively toward outer peripheral and central portions of the disc. The main and two auxiliary light beams (Lm',Lp',Ln') from the disc are detected respectively by first, second and third photodetecting elements (60,62,64) each divided into two parts to produce first, second and third difference signal (Sm,Sp,Sn) based on respectively detection outputs from two parts of the first photodetecting element, detection outputs from two parts of the second photodetecting element and detection outputs from two parts of the third photodetecting element. A tracking error signal (St) is produced based on a ratio of a difference between the first difference signal (Sm) and the sum of the second and third difference signals (Sp,Sn) in relation to a difference between the second and third difference signals (Sp,Sn) so as to have a constant amplitude without variations in response to variations in depth of a guide groove, variations in depth of each of pits or in height of each of bumps forming the record track, variations in reflectance to a light beam of the disc or variations in quantity of the light beam impinging on the disc.
摘要翻译： PCT No.PCT / JP90 / 00707 Sec。 371日期1991年1月31日 102（e）日期1991年1月31日PCT提交1990年5月31日PCT公布。出版物WO90 / 15408 日期1990年12月13日。一种光学记录和/或再现装置，通过该装置使主和两个辅助光束被撞击在盘上。两个辅助光斑通过两个辅助光束分别形成在光盘上形成的主光束上的四分之一光道上，主光束分别朝向盘的外周和中心部分延伸四分之一的光道。分别由分别被分成两部分的第一，第二和第三光电检测元件（60,62,64）检测来自盘的主要和两个辅助光束（Lm'，Lp'，Ln'），以产生第一，第二和第三基于来自第一受光元件的两个部分的检测输出，来自第二受光元件的两个部分的检测输出和来自第三受光元件的两个部分的检测输出的差分信号（Sm，Sp，Sn）。基于第一差分信号（Sm）与第二和第三差分信号（Sp，Sn）的和之间的差值与第二和第三差值之间的差异的比率产生跟踪误差信号（St）信号（Sp，Sn），以便具有恒定幅度而不会响应于导向槽的深度变化而变化，每个凹坑的深度的变化或形成记录轨道的每个凸起的高度的变化，反射率的变化盘的光束或入射到盘上的光束的量的变化。

42. 发明授权

US5140577A Tracking error signal generating circuit for a multichannel type optical disc player 失效
标题翻译：跟踪用于多通道型光盘播放器的错误信号发生电路
公开(公告)号：US5140577A
公开(公告)日：1992-08-18
申请号：US623436
申请日：1990-12-11
申请人： Kiyoshi Ohsato
发明人： Kiyoshi Ohsato
IPC分类号： G11B7/09 , G11B7/095 , G11B7/14
CPC分类号： G11B7/14 , G11B7/0903 , G11B7/0956
摘要： In an apparatus for recording or reproducing signals recorded in tracks on an optical disk, a plurality of main light beams and a plurality of auxiliary light beams are generated and directed so that each of the main light beams impinge on a separate one of the tracks on the optical disk and each of the auxiliary light beams impinge between the tracks, main read light beams, corresponding to the reflections of the main light beams from the disk, and auxiliary read light beams, corresponding to reflections of the auxiliary light beams from the disk, are directed to a photosensor assembly, and the photosensor assembly includes a plurality of sensors for separately sensing each of the main read light beams and the auxiliary read light beams. Each of the sensors is bifurcated to produce a pair of output signals for each sensor. A tracking error is produced by summing the differences of the output signals from each sensor which senses a main read light beam to produce a first difference signal, summing the differences of the output signals from each sensor which senses an auxiliary read light beam to produce a second difference signal, and taking the difference of the first and second difference signals.
摘要翻译： PCT No.PCT / JP90 / 00522 Sec。 371 1990年12月11日第 102（e）1990年12月11日的PCT PCT 1990年4月23日提交PCT公布。 WO90 / 13116 PCT出版物日期1990年11月1日。在用于记录或再现记录在光盘上的轨道中的信号的装置中，生成并指导多个主光束和多个辅助光束，使得每个主光束照射光盘上的轨道中的单独的一个和每个辅助光束照射在轨道之间，对应于来自盘的主光束的反射的主读取光束以及对应于辅助读取光束的反射的辅助读取光束来自盘的辅助光束被引导到光传感器组件，并且光传感器组件包括用于分别感测主读取光束和辅助读取光束中的每一个的多个传感器。每个传感器被分叉以产生用于每个传感器的一对输出信号。通过对来自每个传感器的输出信号的差进行求和来产生跟踪误差，该传感器感测主读取光束以产生第一差分信号，对来自每个感测辅助读取光束的传感器的输出信号的差进行求和，从而产生第二差分信号，并取第一和第二差信号的差。

43. 发明授权

US4796250A Optical recording and reproducing apparatus including a disc extraction area for power setting a laser 失效
标题翻译：光学记录和再现装置包括用于设置激光的光盘提取区域
公开(公告)号：US4796250A
公开(公告)日：1989-01-03
申请号：US074865
申请日：1987-07-17
申请人： Seiji Kobayashi , Kiyoshi Ohsato
发明人： Seiji Kobayashi , Kiyoshi Ohsato
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/007 , G11B7/013 , G11B7/125 , G11B7/135 , G11B11/105 , G11B3/90 , G01J1/32
CPC分类号： G11B11/10595 , G11B11/10536 , G11B11/10543 , G11B11/10578 , G11B7/126 , G11B7/00745
摘要： An apparatus for recording and reproducing data into/from an optical disc, which includes an optical disc having an optical recording medium into and from which data can be written and erased, a laser diode to write, erase, and read out data into and from the optical disc, and a power setting circuit for sampling and holding a detection output from a photo diode to detect the light emission power of the laser diode, for comparing the value sampled and held with a target value, and for setting the power of laser diode. A light emission power of laser diode in each of the data writing, erasing, and reading modes is controlled by the power setting means. A part of a recording area of the optical disc is provided with an extracting area to sample and hold the detection output from the photo diode.
摘要翻译：一种用于向/从光盘记录和再现数据的装置，其包括具有光学记录介质的光盘，数据可从其中写入和擦除;激光二极管，用于写入，擦除和读出数据到和从光盘和用于对来自光电二极管的检测输出进行采样和保持以检测激光二极管的发光功率的功率设置电路，用于将采样和保持的值与目标值进行比较，并且用于设置激光器的功率二极管。在数据写入，擦除和读取模式的每一个中激光二极管的发光功率由功率设定装置控制。光盘的记录区域的一部分设置有采样保持来自光电二极管的检测输出的提取区域。

44. 发明授权

US4775968A Tracking error detecting system for optical head 失效
标题翻译：光头跟踪误差检测系统
公开(公告)号：US4775968A
公开(公告)日：1988-10-04
申请号：US878289
申请日：1986-06-13
申请人： Kiyoshi Ohsato
发明人： Kiyoshi Ohsato
IPC分类号： G11B7/09 , G11B7/095 , G11B7/00
CPC分类号： G11B7/0903 , G11B7/0943 , G11B7/0956
摘要： According to a tracking error system of an optical head of the present invention, a pair of beams are irradiated through an objective lens (4) on an optical record medium (5) with a distance of a multiple of an odd number of substantially 1/2 the track pitch thereof, a pair of beams emitted from the optical record medium (5) are respectively introduced into a pair of two-divided photo detection elements (6.sub.1) and (6.sub.2) and a tracking error signal is obtained from a difference between difference outputs between outputs of both detected outputs from the pair of respective two-divided photo detection elements (6.sub.1) and (6.sub.2). Thus, it is possible to remove a DC fluctuation of a tracking error signal caused by the lateral movement of the objective lens (4) and a radial skew of the optical record medium (5).
摘要翻译： PCT No.PCT / JP85 / 00546 Sec。 371日期1986年6月13日第 102（e）日期1986年6月13日PCT提交1985年10月3日PCT公布。出版物WO86 / 02479 日期：1986年04月24日。根据本发明的光头的跟踪误差系统，通过光学记录介质（5）上的物镜（4）照射一对光束，其距离为将从光记录介质（5）发射的一对光束分别引入一对二分光检测元件（61）和（62）和跟踪误差信号是从一对相应的两分光检测元件（61）和（62）的两个检测输出的输出之间的差输出之间的差获得的。因此，可以消除由物镜（4）的横向运动和光学记录介质（5）的径向偏斜引起的跟踪误差信号的DC波动。

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