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1. 发明授权

US4157568A Method and apparatus for optically reproducing a rotatable record with a scanning light beam of changing size 失效
标题翻译：用于以具有变化的尺寸的扫描光束光学地再现可旋转记录的方法和装置
公开(公告)号：US4157568A
公开(公告)日：1979-06-05
申请号：US855303
申请日：1977-11-28
申请人： Hiroshi Ohki , Takashi Otobe , Chiaki Kojima
发明人： Hiroshi Ohki , Takashi Otobe , Chiaki Kojima
IPC分类号： H04N5/85 , G11B7/005 , G11B7/12 , G11B7/125 , G11B7/135 , G11B7/1381 , G11B7/18 , G11B19/24
CPC分类号： G11B7/0908 , G11B19/24 , G11B7/005 , G11B7/12 , G11B7/1381
摘要： A rotatable record carrier upon which reproducible information is recorded in the form of spaced apart pits in substantially concentric circular tracks on a surface of the carrier. The pits may represent frequency-modulated information signals, and the lengths of the pits are independent of the frequency of the information signals. A method and apparatus for reproducing information from this record carrier is disclosed, wherein a light beam is used to scan the tracks of the record medium, and the size of the scanning light beam is changed as a function of the radius of the track which then is being scanned so as to increase the size of the beam when a track of larger radius is scanned. This control over the size of the scanning beam establishes a constant relationship between the size of the beam and the length of the pits despite changes in the pit length due to the different radii of the tracks.
摘要翻译：可旋转的记录载体，可再现的信息以分隔开的凹坑的形式记录在载体的表面上的基本上同心的圆形轨道中。凹坑可以表示频率调制信息信号，并且凹坑的长度与信息信号的频率无关。公开了一种用于从该记录载体再现信息的方法和装置，其中使用光束来扫描记录介质的轨道，并且扫描光束的尺寸随着轨道的半径而变化正在进行扫描，以便当扫描较大半径的轨道时增加光束的尺寸。对于扫描光束的尺寸的这种控制建立了光束的尺寸和凹坑的长度之间恒定的关系，尽管由于轨道的不同半径引起的凹坑长度的变化。

2. 发明授权

US4152726A Record disk and method for producing the same with constant width groove 失效
标题翻译：记录磁盘及其制造方法，具有恒定宽度的凹槽
公开(公告)号：US4152726A
公开(公告)日：1979-05-01
申请号：US710098
申请日：1976-07-30
申请人： Chiaki Kojima , Yuzuru Yanagisawa , Takashi Otobe , Hiroshi Ohki
发明人： Chiaki Kojima , Yuzuru Yanagisawa , Takashi Otobe , Hiroshi Ohki
IPC分类号： G11B3/00 , G11B3/70 , G11B3/72 , G11B7/007 , G11B7/128 , G11B7/26 , G11B23/00 , H04N5/76 , G11B7/00
CPC分类号： G11B7/128 , G11B23/0057 , G11B3/702 , G11B3/72 , G11B7/007 , G11B7/261
摘要： In a record disk having a spiral groove in a surface thereof with the depth of the groove varying along the latter for representing recorded information, such as video signals; the groove has an inverted bell-shaped cross-section which is symmetrical about the median of the groove with each of the opposite side surfaces of the groove, at any location therealong, being defined approximately by the equationd.sub.x =d.sub.o .multidot.exp [-(x/w).sup.2 ]in which d.sub.o is the depth of the groove at the median thereof, w is the distance from the median of the groove to the point at the side surface of the groove where the depth is d.sub.o /e (e being the base of the natural logarithm), and d.sub.x is the depth of the groove at the respective side surface at a distance x from the median. The foregoing record disk is conveniently molded in correspondence with an original recording disk produced by directing a laser light beam which has a Gaussian energy distribution thereacross against a layer of positive type photo-resist material on the original recording disk while the latter and the light beam are moved relative to each other for scanning a spiral track of constant pitch on the original recording disk and while the intensity of the laser light beam is modulated by the information signals to be recorded, and then developing the layer of photo-resist material.
摘要翻译：在具有在其表面上具有螺旋槽的记录盘中，凹槽的深度沿着该槽的深度变化，用于表示诸如视频信号的记录信息; 凹槽具有倒置的钟形横截面，其关于凹槽的中间对称，凹槽的每个相对的侧表面在其任何位置处，大致由方程式DX = DOxEXP [ - （X / W）2]在中间的深处，W在距离中心的距离到距离深度为E / E的地面的边缘的距离（E为基准）的自然对数），而DX是距离媒体的距离X的相对侧表面上的深度。上述记录盘与通过将具有高斯能量分布的激光束对准原始记录盘上的正型光致抗蚀剂材料层而产生的原始记录盘相适应地模制，而后者和光束相对于彼此移动，用于扫描原始记录盘上的恒定螺距的螺旋轨迹，同时激光束的强度被待记录的信息信号调制，然后显影该光致抗蚀材料层。

3. 发明授权

US4253723A Apparatus for optically reading information from a record carrier 失效
标题翻译：用于从记录载体光学读取信息的装置
公开(公告)号：US4253723A
公开(公告)日：1981-03-03
申请号：US841210
申请日：1977-10-11
申请人： Chiaki Kojima , Takashi Otobe , Hiroshi Ohki
发明人： Chiaki Kojima , Takashi Otobe , Hiroshi Ohki
IPC分类号： G02B5/32 , G11B7/085 , G11B7/09 , G11B7/1353 , G11B7/1374 , G11B7/12
CPC分类号： G02B5/32 , G11B7/0917 , G11B7/1353 , G11B7/1374 , G11B2007/0924 , G11B7/0901
摘要： Apparatus for reading optically detectable indicia on a record carrier, such as video information which is recorded in the form of pits on a record medium, for example, a video disc. A source of coherent light transmits a beam to the record carrier. A hologram is interposed between the coherent light source and the carrier, the hologram serving to focus the beam on the record carrier. The intensity of the focussed beam is modulated by the recorded indicia, and at least one photodetector is disposed in an optical path traversed by the modulated beam so as to detect the intensity thereof. In a preferred embodiment, the hologram focusses the beam onto the surface of the record medium whereat it is modulated and reflected therefrom to the photodetector. Plural photodetectors may be provided in separate optical paths traversed by the reflected light so as to produce outputs which, upon comparison with each other, represent deviations, or tracking errors, in the location of incidence of the light beam on the record medium. In yet another embodiment, the hologram directs the coherent light to the record medium along two different optical paths so that the reflection of one beam can be used to read out the recorded information and the reflection of the other beam can be used to detect focussing fluctuations. In a still further embodiment, another hologram is used to receive and direct reflected light to the photodetector.
摘要翻译：用于在记录载体上读取光学可检测标记的装置，例如以记录介质（例如视频盘）上的凹坑形式记录的视频信息。相干光源将光束传输到记录载体。全息图被插入在相干光源和载体之间，全息图用于将光束聚焦在记录载体上。聚焦光束的强度由所记录的标记调制，并且至少一个光电探测器设置在由调制光束穿过的光路中，以便检测其强度。在优选实施例中，全息图将光束聚焦到记录介质的表面上，在该表面上被调制并从其反射到光电探测器。可以在由反射光穿过的分开的光路中提供多个光电检测器，以便产生在彼此比较时在光束在记录介质上的入射位置的偏差或跟踪误差的输出。在另一个实施例中，全息图将相干光沿着两个不同的光学路径引导到记录介质，使得可以使用一个光束的反射来读出记录的信息，并且可以使用另一个光束的反射来检测聚焦波动。在又一个实施例中，使用另一全息图来接收并将反射光引导到光电检测器。

4. 发明授权

US4142210A Rotatable record carrier and method and apparatus for producing same 失效
标题翻译：可转动记录载体及其制造方法和装置
公开(公告)号：US4142210A
公开(公告)日：1979-02-27
申请号：US851304
申请日：1977-11-14
申请人： Takashi Otobe , Chiaki Kojima , Hiroshi Ohki
发明人： Takashi Otobe , Chiaki Kojima , Hiroshi Ohki
IPC分类号： G11B7/00 , G11B7/0045 , G11B23/00 , H04N5/92
CPC分类号： G11B7/0045 , G11B23/0007
摘要： A rotatable record carrier upon which reproducible information is recorded in the form of spaced apart pits in substantially concentric circular tracks on a surface of the carrier. A method of producing this record carrier is disclosed wherein, although the linear velocity of each track is dependent upon the radius of the track, the length of the pits in the respective tracks does not vary as a function of the change in the radius from one track to the next. A light beam is modulated with a rectangular pulse information signal, the duration of each pulse being controlled as a function of the radius of the track which is being scanned by the modulated light beam. For tracks having a smaller radius, the pulse duration is made larger than for tracks having a larger radius. When the record carrier of this invention is used for optically reproducing the recorded information signals, a proper relationship between the size of the scanning beam spot and the length of the recorded pits can be maintained merely by retaining a substantially constant beam spot.
摘要翻译：可旋转的记录载体，可再现的信息以分隔开的凹坑的形式记录在载体的表面上的基本上同心的圆形轨道中。公开了一种产生该记录载体的方法，其中，尽管每个轨道的线速度取决于轨道的半径，但各个轨迹中的凹坑的长度不随着半径的变化而变化追踪到下一个用矩形脉冲信息信号调制光束，每个脉冲的持续时间被控制为被调制光束扫描的轨道的半径的函数。对于具有较小半径的轨道，使脉冲持续时间大于具有较大半径的轨道。当本发明的记录载体用于光学再现所记录的信息信号时，仅通过保持基本上恒定的光束点就可以保持扫描光点的尺寸和记录的凹坑的长度之间的适当的关系。

5. 发明授权

US4107729A Method and apparatus for reproducing signals from a rotating record medium and method and apparatus for making same 失效
标题翻译：用于从旋转记录介质再现信号的方法和装置及其制造方法和装置
公开(公告)号：US4107729A
公开(公告)日：1978-08-15
申请号：US751179
申请日：1976-12-16
申请人： Takashi Otobe , Chiaki Kojima , Hiroshi Ohki
发明人： Takashi Otobe , Chiaki Kojima , Hiroshi Ohki
IPC分类号： G11B20/02 , H04N5/781 , H04N5/92 , H04N9/82 , H04N9/85 , H04N5/76
CPC分类号： H04N5/781 , H04N5/92 , H04N9/82
摘要： A method of and apparatus for recovering information from a record medium of the type wherein the information is modulated onto a carrier and recorded in one portion of the record medium and the carrier is recorded in another portion of the record medium. The modulated information is reproduced from the record medium while the medium is rotated, and simultaneously, the carrier also is reproduced from the medium. The reproduced modulated information then is demodulated with the reproduced carrier to recover the original signal information. In one embodiment, the recorded information is a composite color television signal and the carrier constitutes the chrominance subcarrier for the color television signal.Also disclosed is a method and apparatus for recording signal information on a rotatable record medium. A reference signal is provided and is recorded in a circular track on the record medium. Signal information also is provided and is modulated onto the reference signal, the modulated signal information then being recorded in a separate portion of the record medium. In one embodiment, the reference signal upon which the signal information is modulated is the previously recorded reference signal that has been played back from the record medium. The signal information may comprise color video signal components and the reference signal may comprise one or more subcarriers for the color video signal components. Preferably, the color video components which are modulated onto the subcarriers are combined with a luminance signal and recorded as a composite color television signal.
摘要翻译：一种用于从该类型的记录介质中恢复信息的方法和装置，其中信息被调制到载体上并被记录在记录介质的一部分中，载体被记录在记录介质的另一部分中。当介质旋转时，从记录介质再现调制信息，并且同时也从介质再现载体。然后再现的已调制信息用再现的载波进行解调，以恢复原始信号信息。在一个实施例中，记录的信息是复合彩色电视信号，载波构成彩色电视信号的色度副载波。

6. 发明授权

US4150398A Linear method of optically recording a video or other signal 失效
标题翻译：光学记录视频或其他信号的线性方法
公开(公告)号：US4150398A
公开(公告)日：1979-04-17
申请号：US648006
申请日：1976-01-12
申请人： Chiaki Kojima , Hiroshi Ohki , Yuzuru Yanagisawa
发明人： Chiaki Kojima , Hiroshi Ohki , Yuzuru Yanagisawa
IPC分类号： G11B7/24 , G11B7/0045 , G11B7/125 , G11B7/128 , G11B7/26 , G11B23/00 , H04N5/76
CPC分类号： G11B7/128 , G11B23/0057 , G11B7/0045 , G11B7/261 , Y10S430/146
摘要： In optically producing a reproducible recording of video or other signals, the intensity of at least one laser light beam is modulated by the signals to be recorded while such light beam scans a substantially flat surface on a photo-sensitive recording medium which is photo-reacted to a degree varying substantially linearly in correspondence with the intensity of the light impinging thereon over a predetermined range of light intensities, and the intensity of the light beam and the degree of modulation thereof by the signals are selected to maintain the maximum and minimum intensities of the modulated light beam within such predetermined range so as to form simultaneously on the record medium a tracking path portion and a recorded signal portion which is unified with the latter. The photo-sensitive record medium is desirably constituted by a positive photo-resist so that, upon development thereof, the tracking path portion is obtained in the form of a groove having the recorded signal portion defined by irregularities at the bottom of such groove. The positive photo-resist or other photo-sensitive material may be conveniently applied as a layer on a base plate or disc which is rotated while the light beam and disc are moved relative to each other in a radial direction of the disc so that the groove or other tracking path portion forms a spiral.
摘要翻译：在光学地产生视频或其他信号的可再现记录时，至少一个激光束的强度被待记录的信号调制，而这样的光束扫描光敏记录介质上基本上平坦的表面，光敏记录介质被光反应在一定程度的光强度下对应于入射到其上的光的强度基本线性地变化的程度，并且选择光束的强度及其信号的调制程度以保持最大和最小强度调制光束在该预定范围内，以便在记录介质上同时形成跟踪路径部分和与后者统一的记录信号部分。感光记录介质理想地由正光致抗蚀剂构成，使得在显影时，获得具有记录信号部分的槽的形式的跟踪路径部分，该记录信号部分由凹槽底部的凹凸限定。正光敏抗蚀剂或其它感光材料可以方便地作为层在基板或盘上施加，所述基板或盘在光盘和盘在盘的径向方向上相对于彼此移动而旋转，使得凹槽或其他跟踪路径部分形成螺旋。

7. 发明授权

US4458980A Optical reproducing head 失效
标题翻译：光学再现头
公开(公告)号：US4458980A
公开(公告)日：1984-07-10
申请号：US189577
申请日：1980-09-23
申请人： Hiroshi Ohki , Chiaki Kojima
发明人： Hiroshi Ohki , Chiaki Kojima
IPC分类号： G02B5/32 , G03F7/04 , G11B7/085 , G11B7/09 , G11B7/12 , G11B7/123 , G11B7/13 , G11B7/135 , G11B7/1353 , G11B7/1372 , G11B7/1381
CPC分类号： G11B7/1381 , G03F7/04 , G11B7/085 , G11B7/123 , G11B7/13 , G11B7/1353 , G11B7/1372 , G11B7/0901 , G11B7/0904 , G11B7/0909 , G11B7/0916 , G11B7/0917
摘要： An optical reproducing head for reproducing an information signal recorded on an optical record medium includes a semiconductor laser for generating a laser beam, a first off-axis hologram lens irradiated with the laser beam from the semiconductor laser to produce a beam of parallel rays of light that has an optical axis which is off-set with respect to the optical axis of the laser beam, a second off-axis hologram lens irradiated with the beam of parallel rays of light from the first off-axis hologram lens to generate a focused beam which has an optical axis which is off-set with respect to the optical axis of the beam of parallel rays of light and has an optical axis perpendicular to the optical record medium, and a photo-detector detecting the intensity of a non-diffracted wave beam from the first off-axis hologram lens means, the non-diffracted wave beam being at least part of the focused beam which has been reflected from the optical record medium and has been diffracted by the second off-axis hologram lens. The output of the photodetector is used to produce a focus error signal and a tracking error signal for controlling the focus servo and tracking servo operations.
摘要翻译：用于再现记录在光学记录介质上的信息信号的光学再现头包括用于产生激光束的半导体激光器，用来自半导体激光器的激光束照射的第一离轴全息图透镜，以产生平行光束其具有相对于激光束的光轴偏移的光轴;第二离轴全息图透镜，用来自第一离轴全息透镜的平行光束照射以产生聚焦光束其具有相对于平行光束的光轴偏移的光轴，并且具有垂直于光学记录介质的光轴，并且光检测器检测非衍射波的强度来自第一离轴全息透镜装置的光束，非衍射波束是已经从光学记录介质反射并已被衍射的聚焦光束的至少一部分斜轴全息透镜。光电检测器的输出用于产生聚焦误差信号和跟踪误差信号，用于控制聚焦伺服和跟踪伺服操作。

8. 发明授权

US4312559A Method of producing an inline hologram lens 失效
标题翻译：制造直列全息图透镜的方法
公开(公告)号：US4312559A
公开(公告)日：1982-01-26
申请号：US145687
申请日：1980-05-01
申请人： Chiaki Kojima , Hiroshi Ohki , Kayoko Hasegawa
发明人： Chiaki Kojima , Hiroshi Ohki , Kayoko Hasegawa
IPC分类号： G02B5/32
CPC分类号： G02B5/32 , Y10S359/90
摘要： An inline hologram lens suitable for use in an optical reproducing head is formed by first preparing a mother off-axis hologram lens by exposing a photo-sensitive layer to a subject wave beam and an off-axis reference wave beam, and then developing the photo-sensitive layer; and subsequently by forming the inline hologram lens by exposing a second photo-sensitive layer to an interference pattern formed by passing an inline reference wave beam through the mother off-axis hologram lens to be incident normal to the second photo-sensitive layer while passing an off-axis subject coherent beam at an angle through said off-axis mother hologram lens to form a subject beam that is focussed a predetermined distance from the second photo-sensitive layer, and finally by developing the second photo-sensitive layer. Preferably, the mother hologram lens has a diffraction efficiency of less than unity. An optical reproducing head utilizing such an inline hologram lens includes a beam-splitter, a quarter-wave plate, the inline hologram lens, and a transparent adhesive to adhere the beam-splitter, plate, and lens to one another.
摘要翻译：适用于光学再现头的直列全息图透镜首先通过将感光层曝光于目标波束和离轴参考波束，然后显影照片来形成母体离轴全息透镜敏感层; 并且随后通过将第二感光层暴露于通过使在线参考波束通过母体离轴全息透镜而形成的干涉图案来形成直列全息图透镜，以便在通过第二光敏层时正常入射到第二光敏层离轴对象相干光束通过离轴母体全息透镜成角度地形成从第二感光层聚焦预定距离的目标光束，最后通过显影第二光敏层。优选地，母体全息透镜具有小于1的衍射效率。利用这种在线全息透镜的光学再现头包括分束器，四分之一波长板，直列全息透镜和透明粘合剂，以将分束器，板和透镜彼此粘合。

9. 发明授权

US06504812B2 Optical pickup device with a plurality of laser couplers 有权
公开(公告)号：US06504812B2
公开(公告)日：2003-01-07
申请号：US10037011
申请日：2001-12-31
申请人： Tadashi Taniguchi , Chiaki Kojima
发明人： Tadashi Taniguchi , Chiaki Kojima
IPC分类号： G11B700
CPC分类号： G11B7/127 , G11B7/123 , G11B7/131 , G11B7/1359 , G11B2007/0006
摘要： An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LC1 and LC2 that are designed for optimum read/write specifications for optical discs which are different in format from each other. In one embodiment, two laser couplers LC1 and LC2 are incorporated on a common photodiode IC to form a single laser coupler, and the laser coupler is used in an optical pickup device.

10. 发明授权

US4026604A Ground excavating apparatus 失效
标题翻译：地面挖掘装置
公开(公告)号：US4026604A
公开(公告)日：1977-05-31
申请号：US616289
申请日：1975-09-24
申请人： Mitsuteru Motomura , Chiaki Kojima , Hiroshi Ohta , Akira Nemoto
发明人： Mitsuteru Motomura , Chiaki Kojima , Hiroshi Ohta , Akira Nemoto
IPC分类号： E02F3/28 , E02F3/96 , E21C35/02
CPC分类号： E02F3/966 , E02F3/286
摘要： Such a ground excavating apparatus that conducts excavation of a soft stratum by means of a bucket and employs an impact crusher for the excavation of such a hard stratum as a rock bed or the like is disclosed.Introduced in the present application is a ground excavator of such a category that comprises a housing, a bucket boom properly set in place in the said housing in a manner of being capable of traveling forward and rearward, a bucket properly fitted in place on the front end section of the said bucket boom in a manner of being capable of inclining, and an impact crushing mechanism well capable of traveling forward and rearward by virtue of a hydraulic jack housed in the said bucket boom, and employs the said bucket and the said impact crushing mechanism in an alternate manner to best suit the nature of the ground to be excavated.
摘要翻译：公开了一种通过铲斗进行柔软地层的挖掘并采用冲击式破碎机来挖掘诸如岩石床等硬层的地面挖掘装置。

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