专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5511050A Focus error detecting method and optical head using the same 失效
标题翻译：聚焦误差检测方法和光头使用相同
公开(公告)号：US5511050A
公开(公告)日：1996-04-23
申请号：US705535
申请日：1991-05-24
申请人： Kiyoshi Matsumoto , Takeshi Maeda , Shigeru Nakamura , Mariko Umeda , Masuo Kasai
发明人： Kiyoshi Matsumoto , Takeshi Maeda , Shigeru Nakamura , Mariko Umeda , Masuo Kasai
IPC分类号： G11B7/007 , G11B7/09 , G11B7/125 , G11B7/135 , G11B11/105 , G11B7/00
CPC分类号： G11B7/0909 , G11B7/0917 , G11B7/128 , G11B7/1353 , G11B7/1398 , G11B11/10576 , G11B7/00745 , G11B7/0938 , G11B7/0943
摘要： A focus error detecting method and an optical head using it. In the focus error detecting method, a light beam is emitted from a light source, the beam is given positive and negative astigmatism by a diffraction grating or an acoustooptic element in a focusing optical system, beams thus formed are focused on an information recording surface, the beams reflected from the information recording surface are received by photo-detecting elements in separated optics, the reflected beams with positive and negative astigmatism are compared with each other to take a difference in a focus error detecting circuit, and a focus error detecting signal is obtained on the basis of the difference. The focus for the optical head can be adjusted using the focus error detecting signal.
摘要翻译：聚焦误差检测方法和使用它的光头。在聚焦误差检测方法中，从光源发射光束，聚焦光学系统中的光束由衍射光栅或声光元件给出正和负像散，所形成的光束聚焦在信息记录表面上，从信息记录表面反射的光束被分离的光学元件中的光检测元件接收，将具有正和负像散的反射光束彼此进行比较以获得聚焦误差检测电路的差异，并且聚焦误差检测信号为根据差异获得。可以使用聚焦误差检测信号调整光学头的焦点。

2. 发明授权

US5235591A Stack type optical disc apparatus, sealed and separate type optical head therefor and optical disc medium 失效
标题翻译：堆叠式光盘装置，密封分离型光头及光盘介质
公开(公告)号：US5235591A
公开(公告)日：1993-08-10
申请号：US641309
申请日：1991-01-15
申请人： Shigeru Nakamura , Eiichi Seya , Seiichi Mita , Masuo Kasai , Masahiro Ojima , Hiroshi Yasuoka , Motoyasu Terao , Yoshinori Miyamura , Takeshi Nakao , Kiyoshi Matsumoto , Yoshihiro Hamakawa
发明人： Shigeru Nakamura , Eiichi Seya , Seiichi Mita , Masuo Kasai , Masahiro Ojima , Hiroshi Yasuoka , Motoyasu Terao , Yoshinori Miyamura , Takeshi Nakao , Kiyoshi Matsumoto , Yoshihiro Hamakawa
IPC分类号： G11B7/12 , G11B7/14 , G11B33/14
CPC分类号： G11B7/14 , G11B33/14 , G11B7/122
摘要： A separation type optical head according to the present invention includes at least a light source portion for emitting collimated beams, a focusing device (a focusing lens) for focusing the collimated beams onto an information recording surface of an optical disc medium, a focal point control mechanism for the position of the spot on the information recording surface, and a photo-detection portion for receiving beams reflected by the information recording surface. The structure is divided into a fixed portion including the light source portion and the photo-detection portion and a movable portion including the focusing device (focusing lens) and the focal point control mechanism. At least the movable portion of the separation type optical head is movably accommodated n a frame (sealing case) for the optical head so as to prevent irregular vibrations of the movable portion due to high speed air flows or turbulence. Furthermore, a focal point control mechanism of an air float type may be employed in the movable portion of the separation type optical head so as to actively utilize the high speed air flow generated due to the rotation of the disc medium to perform a rough adjustment of the focal point of the focusing device.
摘要翻译：根据本发明的分离型光学头至少包括用于发射准直光束的光源部分，用于将准直光束聚焦到光盘介质的信息记录表面上的聚焦装置（聚焦透镜），焦点控制在信息记录表面上的位置的机构，以及用于接收由信息记录表面反射的光束的光检测部分。该结构被分为包括光源部分和光检测部分的固定部分和包括聚焦装置（聚焦透镜）和焦点控制机构的可动部分。至少分离型光学头的可移动部分可移动地容纳在用于光学头的框架（密封壳体）中，以防止由于高速空气流动或湍流引起的可移动部分的不规则振动。此外，可以在分离型光学头的可动部分中采用气浮式的焦点控制机构，以便主动地利用由于盘介质的旋转而产生的高速气流来进行粗略调整聚焦装置的焦点。

3. 发明授权

US4731771A Tracking servo setting method and apparatus 失效
标题翻译：跟踪伺服设定方法和装置
公开(公告)号：US4731771A
公开(公告)日：1988-03-15
申请号：US829024
申请日：1986-02-13
申请人： Takeshi Maeda , Kazuo Shigematsu , Shigeru Nakamura , Yoshito Tsunoda , Masuo Kasai
发明人： Takeshi Maeda , Kazuo Shigematsu , Shigeru Nakamura , Yoshito Tsunoda , Masuo Kasai
IPC分类号： G11B7/085 , G11B7/09
CPC分类号： G11B7/08529 , G11B7/08517 , G11B7/0901
摘要： This invention relates to a track setting method for a tracking servo system in an optical disk device and a device therefor. According to this invention the track passage velocity when the light spot moves across the track is detected and setting of the light spot onto the track is performed under the condition that the passage velocity thus detected is lower than a predetermined velocity. In the case where the passage velocity is greater than the predetermined velocity, the light spot is forced to move so that the passage velocity is lower than the predetermined velocity and the light spot is set up thereafter.
摘要翻译：本发明涉及一种用于光盘装置中的跟踪伺服系统的轨道设置方法及其装置。根据本发明，检测到光点移动通过轨迹时的轨迹通过速度，并且在由此检测到的通过速度低于预定速度的条件下执行光点到轨道上的设置。在通过速度大于预定速度的情况下，迫使光斑移动，使得通过速度低于预定速度，此后设定光斑。

4. 发明授权

US5361244A Optical head and information recording apparatus 失效
标题翻译：光头和信息记录装置
公开(公告)号：US5361244A
公开(公告)日：1994-11-01
申请号：US865114
申请日：1992-04-08
申请人： Shigeru Nakamura , Akira Arimoto , Takeshi Nakao , Mariko Umeda
发明人： Shigeru Nakamura , Akira Arimoto , Takeshi Nakao , Mariko Umeda
IPC分类号： G11B7/09 , G11B7/135 , G11B7/22 , H01S5/022 , G11B7/00
CPC分类号： G11B7/1353 , G11B7/0909 , G11B7/22 , H01S5/02248 , H01S5/02288 , H01S5/02296 , H01S5/0683
摘要： Disclosed herein is a compact, adjustment-free, unitary optical head wherein diffraction grating made of a birefrigence material and having convexities and concavities of grating grooves so set that the difference of their optical path lengths is some multiples and a half of the wavelength for an ordinary beam and an extraordinary beam, a diffraction grating providing astigmatisms to .+-.1 order beams, a quarter wavelength plate, and other optical components, are interposed between a semiconductor laser and a focussing lens and are stored inside an optical head body filled with a dry nitrogen gas. A focus error detection signal is obtained from the difference of the degrees of modulation of the .+-.1 order reflected beams by pre-wobbled pits, and adjustment of the optical beam can be carried out by driving the body by a two-directional head actuator.
摘要翻译：本文公开了一种紧凑的，无调节的单一光学头，其中衍射光栅由双折射材料制成并且具有如此设置的光栅槽的凸起和凹陷，使得它们的光程长度的差是波长的一半的一半普通光束和非常光束，向+/- 1阶光束，四分之一波长板和其他光学部件提供散光的衍射光栅插入在半导体激光器和聚焦透镜之间，并且被存储在填充有干燥氮气。根据预摆动凹坑的+/- 1级反射光束的调制度的差异获得聚焦误差检测信号，光束的调节可以通过双向头部的驱动来进行执行器。

5. 发明授权

US4970707A Optical tape apparatus with a tracking control mechanism and/or a focusing control mechanism 失效
标题翻译：具有跟踪控制机构和/或聚焦控制机构的光带装置
公开(公告)号：US4970707A
公开(公告)日：1990-11-13
申请号：US239389
申请日：1988-09-01
申请人： Fumio Hara , Yoshito Tsunoda , Shigeru Nakamura , Yoshizumi Eto , Seiichi Mita , Morishi Izumita , Hiroyuki Tsuchinaga , Masuo Kasai
发明人： Fumio Hara , Yoshito Tsunoda , Shigeru Nakamura , Yoshizumi Eto , Seiichi Mita , Morishi Izumita , Hiroyuki Tsuchinaga , Masuo Kasai
IPC分类号： G11B7/003 , G11B7/09
CPC分类号： G11B7/09 , G11B7/0031 , G11B7/0925
摘要： An optical tape apparatus having improved focus and tracking control. An optical head records, reproduces, or rewrites data on an optical tape by helically scanning the tape with a laser beam. A guide plate is disposed between the optical head and the tape to prevent the beam from becoming unfocused due to fluctuation of the tape cuased by an air film between the optical head and the tape. The optical head contains a semiconductor laser and an optical system exhibiting chromatic aberration for directing the laser beam onto the tape. The optical system includes a condenser lens for focusing the beam onto the tape. Fine focus control is achieved by changing the wavelength of the laser beam by directing part of the beam reflected from the tape back to the laser, thereby changing the focal point of the beam by virtue of the chromatic aberration of the optical system. Coarse focus control is achieved by mounting the condenser lens on a piezoelectric actuator which moves the consenser lens to focus the beam onto the tape. A recording head for recording timing marks and tracking signals on the tape is disposed in advance of the optical head. A reading head reads the timing marks and the optical head reads the tracking signals. The timing marks and tracking signals are used to control the operation of the apparatus such that the tape is transported with a constant speed and data on diagonal signal tracks on the tape is accurately recorded, reproduced, or rewritten.
摘要翻译：具有改进的聚焦和跟踪控制的光带装置。光学头通过用激光束螺旋扫描磁带来记录，再现或重写光学带上的数据。引导板设置在光头和带之间，以防止由于光头和带之间的空气膜带来的带的波动而导致光束不聚焦。光头包含半导体激光器和具有用于将激光束引导到带上的色差的光学系统。光学系统包括用于将光束聚焦到胶带上的聚光透镜。通过将从带反射的光束的一部分引回到激光器来改变激光束的波长，从而通过光学系统的色差来改变光束的焦点来实现精细对焦控制。通过将聚光透镜安装在压电致动器上来实现粗调焦控制，该压电致动器移动辅助透镜以将光束聚焦到带上。在光学头之前设置用于在带上记录定时标记和跟踪信号的记录头。读头读取定时标记，光头读取跟踪信号。定时标记和跟踪信号用于控制装置的操作，使得磁带以恒定速度传送，并且磁带上对角线信号轨道上的数据被精确地记录，再现或重写。

6. 发明授权

US5490133A Optical information processing apparatus and method of controlling position of optical spot and reproducing signals 失效
标题翻译：光信息处理装置和控制光点位置和再现信号的方法
公开(公告)号：US5490133A
公开(公告)日：1996-02-06
申请号：US772443
申请日：1991-10-07
申请人： Shigeru Nakamura , Mariko Umeda , Takeshi Nakao , Akira Arimoto
发明人： Shigeru Nakamura , Mariko Umeda , Takeshi Nakao , Akira Arimoto
IPC分类号： G11B7/007 , G11B7/09 , G11B7/125 , G11B7/135 , G11B11/105 , G11B7/00
CPC分类号： G11B7/1353 , G11B11/10543 , G11B11/10576 , G11B7/0901 , G11B7/0909 , G11B7/0917 , G11B7/128 , G11B7/1367 , G11B7/13922 , G11B2007/13727 , G11B7/00745 , G11B7/0938 , G11B7/0943
摘要： An optical information processing apparatus comprising a diffraction grating for producing a zero-order beam which is a beam emitted by a light source and allowed to pass therethrough and two plus and minus first-order sub-beams respectively having positive and negative astigmatisms, radiated in directions at slight angles different from the main beam, wherein said two sub-beams are focused at opposite positions across said main beam, wherein focusing control is performed by a focusing error signal detected from a difference of signal amplitudes obtained from the respective reflected light quantities of said two sub-beams and wherein tracking control is performed by an off-track signal obtained from a signal according to a reflected light quantity of said main beam. In an apparatus for magneto-optically reproducing information, above all else, a wave plate is inserted between the focusing lens and the separating optical system, thereby increasing the reflected light quantities and stabilizing the magneto-optical signal, focusing signal and tracking signal.
摘要翻译：一种光学信息处理设备，包括用于产生零光束的衍射光栅，该光束是由光源发射并允许通过的光束，以及分别具有正和负散光的两个正负子像素，辐射在方向以与主波束不同的微小角度，其中所述两个子波束聚焦在穿过所述主波束的相对位置，其中聚焦控制由通过从各反射光量获得的信号幅度差检测的聚焦误差信号来执行的所述两个子光束，并且其中跟踪控制由根据所述主光束的反射光量从信号获得的偏离轨道信号执行。在用于磁光再现信息的装置中，首先，在聚焦透镜和分离光学系统之间插入波片，由此增加反射光量并稳定磁光信号，聚焦信号和跟踪信号。

7. 发明授权

US06272100B1 Information recording/reproducing apparatus and method and information recording medium 失效
公开(公告)号：US06272100B1
公开(公告)日：2001-08-07
申请号：US09059977
申请日：1998-04-14
申请人： Tsuyoshi Toda , Shigeru Nakamura , Takeshi Maeda
发明人： Tsuyoshi Toda , Shigeru Nakamura , Takeshi Maeda
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/00454 , G11B7/006
摘要： An information recording/reproducing apparatus includes a detector circuit for detecting a state of reflection light from the recording medium, a control circuit for calculating a radiation power used for writing the information in the recording medium, in accordance with the reflection light state, a pulse generator circuit for generating record pulse information in accordance with the radiation power, and an optical driver circuit for converting the record pulse information into optical information in accordance with the radiation power and driving the optical head to record the light information into the recording medium. Accordingly, the apparatus records information by applying light from an optical head to a record area of a recording medium and changing a state of the record area and reads the information recorded in the record area.

8. 发明授权

US4985616A Optical card having optical grooves for access and wobbled marks for tracking and a recording-reproducing apparatus therefor 失效
标题翻译：具有用于访问的光学凹槽和用于跟踪的摆动标记的光学卡及其记录再现装置
公开(公告)号：US4985616A
公开(公告)日：1991-01-15
申请号：US153003
申请日：1988-02-08
申请人： Shigeru Nakamura , Yoshito Tsunoda , Takeshi Maeda
发明人： Shigeru Nakamura , Yoshito Tsunoda , Takeshi Maeda
IPC分类号： G11B7/24 , G11B7/00 , G11B7/0033 , G11B7/004 , G11B7/007 , G11B7/09
CPC分类号： G11B7/0033 , G11B7/00745 , G11B7/0938
摘要： An optical card of the present invention has a card-shaped recording layer whose optical characteristic is varied by a laser beam applied thereon, and a resin layer for protecting this recording layer. The recording layer has optical grooves provided at a substantially equal interval in the opposite end portions of the recording layer respectively and varying the light intensity of the laser beam when the beam traverses the grooves, and first and second optical markers provided at a prescribed interval in the direction of extension of each of the optical grooves and varying the light intensity of the laser beam which passes them. The optical grooves are made longer every prescribed number thereof than others, and the longer optical grooves are used for zone access, while the shorter optical grooves are used for track access in a zone. The first and second optical markers are provided at positions deviated alternately at equal distance from the center of a track, and operate as so-called wobble pits to detect a track error. These markers are used also as timing marks for generating a clock signal.
摘要翻译：本发明的光卡具有通过施加激光的光学特性而变化的卡状记录层和用于保护该记录层的树脂层。记录层具有分别在记录层的相对端部设置大致相等的间隔的光学槽，并且当光束横过槽时改变激光束的光强度，以及以规定间隔设置的第一和第二光学标记每个光学凹槽的延伸方向和改变通过它们的激光束的光强度。光槽比其他规定的数量更长，并且较长的光槽用于区域访问，而较短的光槽用于区域中的轨道通道。第一和第二光学标记设置在与轨道的中心相等的距离处交替地偏离的位置，并且作为所谓的摆动坑进行操作以检测轨道误差。这些标记也用作产生时钟信号的定时标记。

9. 发明授权

US4901325A Semiconductor laser device 失效
标题翻译：半导体激光器件
公开(公告)号：US4901325A
公开(公告)日：1990-02-13
申请号：US173658
申请日：1988-03-25
申请人： Takeshi Kato , Kenichi Mizuishi , Katuaki Chiba , Takeshi Nakao , Masahiro Ojima , Shigeru Nakamura , Takeshi Maeda
发明人： Takeshi Kato , Kenichi Mizuishi , Katuaki Chiba , Takeshi Nakao , Masahiro Ojima , Shigeru Nakamura , Takeshi Maeda
IPC分类号： G11B7/125 , H01S5/022 , H01S5/024 , H01S5/40
CPC分类号： H01S5/02212 , G11B7/127 , H01S5/024 , H01S5/4025 , H01S5/02288
摘要： A semiconductor laser device utilizing at least a pair of semiconductor laser chips; and a fixing device for fixing the semiconductor laser chips so that electrode surfaces are approximately parallel and opposite to each other and the interval between light emitting spots of the semiconductor laser chips is small.
摘要翻译：一种利用至少一对半导体激光芯片的半导体激光器件; 以及用于固定半导体激光器芯片使得电极表面彼此大致平行且相反并且半导体激光器芯片的发光点之间的间隔小的定影装置。

10. 发明授权

US4663751A Optical information processor for compensating offset 失效
标题翻译：用于补偿偏移的光学信息处理器
公开(公告)号：US4663751A
公开(公告)日：1987-05-05
申请号：US515520
申请日：1983-07-20
申请人： Toshimitsu Kaku , Yoshito Tsunoda , Takeshi Maeda , Shigeru Nakamura
发明人： Toshimitsu Kaku , Yoshito Tsunoda , Takeshi Maeda , Shigeru Nakamura
IPC分类号： G11B7/007 , G11B7/09 , G11B7/095 , G11B7/24 , G11B27/30 , G11B21/10
CPC分类号： G11B27/30 , G11B20/10203 , G11B7/00745 , G11B7/09 , G11B7/094 , G11B7/0956 , G11B2220/2537
摘要： An optical information processor including a recording medium with a guide groove having interrupting portions therealong in the form of mirror areas for reflecting light impinging on the recording medium. A light detector is provided for receiving diffraction light from the guide groove with a first signal detector being provided for differentially operating on signals from the light detector and generating a tracking signal tracking the guide groove. Additionally, a second signal detector is provided for detecting the signal from the light detector indicative of the mirror areas and providing an output indicative thereof which is utilized for compensating the tracking signal. The compensated tracking signal is then utilized for controlling the positioning of the light beam on the recording medium.
摘要翻译：一种光学信息处理器，包括具有引导槽的记录介质，所述引导槽具有镜面区域形式的中断部分，用于反射入射到记录介质上的光。提供了一种光检测器，用于接收来自引导槽的衍射光，第一信号检测器被提供用于对来自光检测器的信号进行差分操作，并产生跟踪引导槽的跟踪信号。此外，提供第二信号检测器，用于检测来自光检测器的指示镜面积的信号，并提供用于补偿跟踪信号的指示的输出。补偿的跟踪信号然后用于控制光束在记录介质上的定位。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式