公开(公告)号：US5107102A

公开(公告)日：1992-04-21

申请号：US646145

申请日：1991-01-25

申请人： Kazuo Noda ,  Koichi Yamazaki ,  Eiichi Nakamura ,  Tetsuya Honda

发明人： Kazuo Noda ,  Koichi Yamazaki ,  Eiichi Nakamura ,  Tetsuya Honda

IPC分类号： G02B7/28 ,  G06K7/015 ,  G11B7/09

CPC分类号： G11B7/094 ,  G11B7/0912 ,  G11B7/0943

摘要： This device is an arrangement for detecting a signal for effecting a focus control of an optical head with respect to an optical information recording medium by making use of a reflected light beam from the optical information recording medium. On an optical path for a reflected light beam reflected from the recording surface of the optical recording medium, a photodetector is provided. This photodetector is composed of a plurality of elements arranged symmetrically in the transverse cross section of the light beam. Thus, an output of the outside element and an output of the inside element of the plural elements arranged in the transverse cross section of the light beam are used to detect a focus error, thus to utilize the signal detected for the focus control.

公开(公告)号：US5023439A

公开(公告)日：1991-06-11

申请号：US456947

申请日：1989-12-26

申请人： Kazuo Noda ,  Koichi Yamazaki ,  Eiichi Nakamura ,  Tetsuya Honda

发明人： Kazuo Noda ,  Koichi Yamazaki ,  Eiichi Nakamura ,  Tetsuya Honda

IPC分类号： G02B7/28 ,  G06K7/015 ,  G11B7/09

CPC分类号： G11B7/094 ,  G11B7/0912 ,  G11B7/0943

摘要： This device is an arrangement for detecting a signal for effecting a focus control of an optical head with respect to an optical information recording medium by making use of a reflected light beam from the optical information recording medium. On an optical path for a reflected light beam reflected from the recording surface of the optical recording medium, a photodetector is provided. This photodetector is composed of a plurality of elements arranged symmetrically in the transverse cross section of the light beam. Thus, an output of the outside element and an output of the inside element of the plural elements arranged in the transverse cross section of the light beam are used to detect a focus error, thus to utilize the signal detected for the focus control.

摘要翻译： 该装置是用于通过利用来自光学信息记录介质的反射光束来检测用于实现相对于光学信息记录介质的光学头的聚焦控制的信号的装置。 在从光记录介质的记录表面反射的反射光束的光路上，提供光电检测器。 该光电检测器由在光束的横截面中对称布置的多个元件组成。 因此，使用布置在光束的横截面中的多个元件的外部元件的输出和内部元件的输出来检测聚焦误差，从而利用为聚焦控制检测到的信号。

公开(公告)号：US5600621A

公开(公告)日：1997-02-04

申请号：US230593

申请日：1994-04-21

申请人： Kazuo Noda ,  Eiichi Nakamura ,  Koichi Yamazaki

发明人： Kazuo Noda ,  Eiichi Nakamura ,  Koichi Yamazaki

IPC分类号： G11B7/125 ,  G11B7/00

CPC分类号： G11B7/131 ,  G11B7/123 ,  G11B7/126 ,  G11B7/1263 ,  G11B7/1362

摘要： In a laser output control device for use in an optical information recording and reproducing apparatus which uses output light from a semiconductor laser device to record and reproduce information onto and from an optical information recording medium, a light receiving element is provided on the peripheral portion of a laser light emitting window formed in a housing of the semiconductor laser device. The peripheral component of forward radiated light of the laser light output from the semiconductor laser device is received by the light receiving element, so as to control the output power of the semiconductor laser device in accordance with output of the light receiving element corresponding to the received light.

摘要翻译： 在使用来自半导体激光装置的输出光在光学信息记录介质上记录和再现信息的光信息记录和再现装置的激光输出控制装置中，光接收元件设置在 形成在半导体激光器件的壳体中的激光发射窗口。 由半导体激光装置输出的激光的前向辐射光的外围部分由光接收元件接收，以便根据接收到的光接收元件的输出来控制半导体激光器件的输出功率 光。

公开(公告)号：US5341053A

公开(公告)日：1994-08-23

申请号：US682691

申请日：1991-04-09

申请人： Koichi Yamazaki ,  Kazuo Noda ,  Eiichi Nakamura

发明人： Koichi Yamazaki ,  Kazuo Noda ,  Eiichi Nakamura

IPC分类号： G11B7/0033 ,  G11B7/085 ,  G11B17/022 ,  G11B17/04 ,  G11B19/20 ,  G11B25/04 ,  H02K41/035 ,  H02K41/02 ,  H01F7/08 ,  H02K33/18

CPC分类号： G11B17/0408 ,  G11B17/022 ,  G11B19/20 ,  G11B25/04 ,  G11B7/0033 ,  G11B7/08588 ,  H02K41/0356

摘要： A linear motor having a magnetic circuit and a moving coil, the magnetic circuit comprising a linear yoke provided at the center of the circuit and a pair of linear magnets, the linear yoke and the pair of linear magnets forming a pair of linear gaps with the linear yoke interposed therebetween, the magnetic circuit applying a magnetic field to the linear gaps, the movable coil mounted on the linear yoke of the magnetic circuit being moved along the linear yoke by an electromagnetic action to the magnetic circuit when the movable coil is powered, wherein the linear magnet has a larger magnetic force at opposite end portions in the longitudinal direction of the linear magnet than at an intermediate area, the magnetic reluctance of the magnetic circuit is made large to obtain a driving current of the movable coil corresponding to the magnetic reluctance when the moving coil moves at the intermediate area of the linear magnet, or the magnetic circuit is mounted on a plate made of material having the same magnetic reluctance as the linear yoke. An information recording/reproducing apparatus having a card transport stage for transporting an information recording medium and a laser unit for radiating a laser beam to the information recording medium, the information recording/reproducing apparatus writing and reading information to and from the information recording medium while reciprocally moving the card transport stage and linearly and reciprocally moving the information recording medium and applying a laser beam to the information recording medium, wherein the apparatus comprising a transport unit wherein the plane of driving force by driving means for reciprocally moving the card transport stage is made substantially flush with the center of a guide shaft for sliding the transport stage.

摘要翻译： 一种具有磁路和动圈的线性电动机，所述磁路包括设置在所述电路中心的线性磁轭和一对直线磁铁，所述直线磁轭和所述一对直线磁铁形成一对线性间隙， 线性磁轭插入其间，磁路向线性间隙施加磁场，当可动线圈通电时，安装在磁路的线性磁轭上的可动线圈通过电磁作用沿线性磁轭移动到磁路， 其中线性磁体在线性磁体的纵向上的相对端部处的磁力大于中间区域，磁路的磁阻变大，以获得对应于磁性的可动线圈的驱动电流 当动线圈在线性磁体的中间区域移动时，或者磁路安装在由材料制成的板上的磁阻 具有与线性磁轭相同的磁阻。 一种信息记录/再现装置，具有用于传送信息记录介质的卡传送台和用于向信息记录介质辐射激光束的激光单元，信息记录/再现装置向信息记录介质写入和读取信息，同时 相互移动卡传送台并且线性地并且往复地移动信息记录介质并将激光束施加到信息记录介质，其中该装置包括传送单元，其中通过用于使卡传送台往复运动的驱动装置的驱动力平面是 与导向轴的中心大致齐平，用于滑动输送台。

公开(公告)号：US5352880A

公开(公告)日：1994-10-04

申请号：US74778

申请日：1993-06-10

申请人： Koichi Yamazaki ,  Kazuo Noda

发明人： Koichi Yamazaki ,  Kazuo Noda

IPC分类号： B42D15/10 ,  G06K19/06 ,  G11B7/0033 ,  G11B7/09 ,  G11B7/24

CPC分类号： G11B7/0033 ,  G11B7/0938 ,  G11B7/24

摘要： The present invention provides an optical card wherein the irradiation position of laser beams is pulled back into an information recording section 1 in such a manner that the operation of recording or reproducing information can continue. In this optical card, information is recorded on or reproduced from a prescribed information recording section on a card surface in accordance with optical scanning along guide tracks provided in the card surface, and the optical card is provided with a mirror section arranged adjacent to the information recording section in the direction parallel to the direction of optical scanning of the information recording section. The optical card is characterized in that the mirror section is provided with at least one pair of curved auxiliary guide tracks that are connected to the guide tracks in the information recording section.

摘要翻译： 本发明提供了一种光卡，其中激光束的照射位置被拉回信息记录部分1，使得记录或再现信息的操作可以继续。 在该光卡中，根据设置在卡表面上的引导轨道的光学扫描，将信息记录在卡表面上的规定信息记录部分上或从卡面上再现，​​并且光卡设置有与信息相邻布置的反射镜部分 记录部分沿着与信息记录部分的光学扫描方向平行的方向。 光卡的特征在于，镜部设置有至少一对弯曲的辅助导轨，其连接到信息记录部中的导轨。

公开(公告)号：US5123003A

公开(公告)日：1992-06-16

申请号：US273426

申请日：1988-11-18

申请人： Kazuo Noda ,  Koichi Yamazaki

发明人： Kazuo Noda ,  Koichi Yamazaki

IPC分类号： G11B7/00 ,  G11B7/0033 ,  G11B7/09 ,  G11B7/14

CPC分类号： G11B7/0938 ,  G11B7/0033 ,  G11B7/14

摘要： The present invention relates to the improvement in an apparatus for reproducing information from a card-like optical information recording medium including tracks for guiding and tracks for information. At least three light spots are formed in said card-like recording medium by light-spot forming means. Signal detection means then detects focusing control signals and tracking control signals by scanning said tracks for guiding with a spot among said light spots. Further, signal reproducing means reproduces information signals of plural tracks by scanning the information tracks with the remaining at least two light spots. The reproduced information signals of the plural tracks are stored in plural memories separately for each track. Subsequently, read-out means sequentially and successively reads the stored information by the time sharing system from each of the plural memories with a speed larger than that when said reproduced information has been input.

公开(公告)号：US5471424A

公开(公告)日：1995-11-28

申请号：US219303

申请日：1994-03-28

申请人： Masayuki Takada ,  Osamu Yamada ,  Toru Kuroda ,  Koichi Yamazaki ,  Kazuo Noda

发明人： Masayuki Takada ,  Osamu Yamada ,  Toru Kuroda ,  Koichi Yamazaki ,  Kazuo Noda

IPC分类号： G11B20/12 ,  G11B20/18 ,  G11C7/00 ,  G06K7/10

CPC分类号： G11B20/1215 ,  G11B20/18 ,  G11B20/1809

摘要： A write once type information recording medium having a recording format that includes sectors. Each Sector includes x pieces of p-bit frames. Each frame contains an f-bit synchronization signal region and a d-bit data region. Each bit of at least one x-bit packet in which a v-bit error correction code has been added to u-bit data, is distributed to each one of the data regions of the x pieces of frames. This makes it possible for the write once type information recording medium to have an increased data storage efficiency and an effective error correction capability for a burst error.

摘要翻译： 一种具有包括扇区的记录格式的一次写入型信息记录介质。 每个扇区包括x个p位帧。 每帧包含f位同步信号区域和d位数据区域。 向x位数据添加了v位纠错码的至少一个x位数据包的每一位被分配给x个帧的每个数据区。 这使得一次写入型信息记录介质可以提高数据存储效率和突发错误的有效纠错能力。

公开(公告)号：US5909418A

公开(公告)日：1999-06-01

申请号：US514590

申请日：1995-08-15

申请人： Kazuo Noda ,  Koichi Yamazaki

发明人： Kazuo Noda ,  Koichi Yamazaki

IPC分类号： G11B7/00 ,  G11B7/0033 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B20/18

CPC分类号： G11B7/131 ,  G11B20/1816 ,  G11B7/0045 ,  G11B7/0903 ,  G11B7/1353 ,  G11B7/0033

摘要： A laser light beam generated from a light source is divided by a diffraction grating into a plurality of light beams, i.e., a single main beam to be used for recording information and plural auxiliary beams distributed on two imaginary straight lines crossing each other. One of the straight lines extends parallel to tracks of a recording medium. The resultant divided beams are converged to be irradiated onto a recording medium, and reflected components, from the recording medium, of the beams are received by corresponding light receiving elements. Thus, the main and auxiliary beams distributed on one of the two imaginary straight lines are used to perform focusing and tracking. Further, one of the two auxiliary beams distributed on the other straight line are used to determine whether a track where information is to be recorded is a blank area or not, and the other of the auxiliary beams is used to verify whether the information has been recorded correctly.

摘要翻译： 从光源产生的激光束被衍射光栅分割为多个光束，即用于记录信息的单个主光束和分布在彼此交叉的两个假想直线上的多个辅助光束。 一条直线平行于记录介质的轨道延伸。 所得到的分束被会聚以照射到记录介质上，并且来自记录介质的光束的反射分量被相应的光接收元件接收。 因此，分布在两条假想直线之一上的主光束和辅助光束用于进行聚焦和跟踪。 此外，分配在另一直线上的两个辅助光束中的一个用于确定要记录信息的轨道是否为空白区域，另一个辅助光束用于验证信息是否已经被 记录正确

公开(公告)号：US5696368A

公开(公告)日：1997-12-09

申请号：US572084

申请日：1995-12-14

申请人： Kazuo Noda ,  Koichi Yamazaki ,  Hiroaki Yoshida

发明人： Kazuo Noda ,  Koichi Yamazaki ,  Hiroaki Yoshida

IPC分类号： G11B7/00 ,  G11B7/0033 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/125 ,  G11B7/08

CPC分类号： G11B7/126 ,  G11B7/0033 ,  G11B7/0045 ,  G11B7/005

摘要： In an optical information recording and reproducing apparatus, information is recorded or reproduced by moving a recording medium relative to an optical head. In order to execute information recording onto the medium in the course of the relative movement involving acceleration and deceleration, the generation timing and intensity of a light beam to be generated in correspondence with the information to be recorded are controlled in response to a varying speed of the relative movement so that data pits to be formed in the recording medium can be standardized in pitch and size irrespective of the relative movement speed. Also, in order to permit information reproduction from the medium in the course of the relative movement involving acceleration and deceleration, reproduction timing of data read by the optical head is set in synchronism with variation in the relative movement speed so that the data can be reproduced at proper timing irrespective of the relative movement speed. With such arrangements, there can be achieved a highly increased information recording/reproduction speed, extended information recording area, reduced size and cost of the apparatus, and reduced power consumption in the apparatus.

摘要翻译： 在光学信息记录和再现装置中，通过相对于光学头移动记录介质来记录或再现信息。 为了在涉及加速和减速的相对运动的过程中执行在介质上的信息记录，将根据要记录的信息产生的光束的产生定时和强度被响应于 相对运动，使得可以在记录介质中形成的数据凹坑能够以相对移动速度的间距和大小被标准化。 此外，为了允许在涉及加速和减速的相对运动的过程中从介质进行信息再现，由光头读取的数据的再现定时与相对移动速度的变化同步地设置，使得可以再现数据 在适当的时间，无论相对移动速度如何。 通过这样的布置，可以实现高度增加的信息记录/再现速度，扩展信息记录区域，减小设备的尺寸和成本，以及降低设备中的功耗。

公开(公告)号：US5515349A

公开(公告)日：1996-05-07

申请号：US346403

申请日：1994-11-29

申请人： Koichi Yamazaki ,  Kazuo Noda ,  Kenzou Yoshihara

发明人： Koichi Yamazaki ,  Kazuo Noda ,  Kenzou Yoshihara

IPC分类号： G11B21/08 ,  G11B7/085 ,  G11B7/00

CPC分类号： G11B7/08541 ,  G11B7/08588

摘要： A position detector detects a relative position of an optical head to a recording medium, and on the basis of the thus-detected relative position, a position detection signal is generated in response to movement of a light beam over a predetermined distance. Then, in response to the position detection signal, a comparison is made between the number of track crossing counted for the predetermined movement distance on the basis of reception of reflection of the light beam, and a predetermined reference value for the predetermined movement distance. Then, track crossing count compensation data is generated which corresponds to a difference between the counted number of track crossing and the reference value, and the counted number of track crossing is corrected by use of such compensation data.

摘要翻译： 位置检测器检测光学头与记录介质的相对位置，并且基于这样检测的相对位置，响应于光束在预定距离上的移动而产生位置检测信号。 然后，响应于位置检测信号，基于接收到光束的反射而计算的针对预定移动距离的轨道交叉次数与预定移动距离的预定参考值进行比较。 然后，产生轨道交叉计数补偿数据，其对应于计数的轨道交叉数与参考值之间的差异，并且通过使用这种补偿数据来校正轨道交叉的计数。