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1. 发明授权

US06660986B2 Information reading and recording apparatus for recording media 失效
公开(公告)号：US06660986B2
公开(公告)日：2003-12-09
申请号：US10026632
申请日：2001-12-27
申请人： Kozo Matsumoto , Atsushi Kitamura , Motoji Egawa
发明人： Kozo Matsumoto , Atsushi Kitamura , Motoji Egawa
IPC分类号： G02B2740
CPC分类号： G11B7/139 , G11B7/123 , G11B7/1374 , G11B2007/0006
摘要： An information reading and recording apparatus in which recording media having respective recording densities different front each other, such as DVD, CD, CD-R/RW and the like, can be compatibly read and recorded only with a low-cost laser diode for low recording density. A laser beam from the laser diode is passed through a collimator lens via a half mirror, and there is provided a reflecting mirror for introducing the laser beam to one of two objective lenses, from which the laser beam is emitted towards the disk. One of the objective lenses is a lens having a high numerical aperture and the other one is a lens having a low numerical aperture. A super-resolution cut-off filter is disposed immediately before the objective lens having a high numerical aperture so that the objective lens and the super-resolution cut-off filter are placed in the optical path on reading DVD. On reading CD, the other lens is placed in the optical path. The laser beam reflected from the disk is received by a photo-detector for converting it into an electrical signal.

2. 发明授权

US07035194B2 Optical pickup apparatus for reading and recording information on recording media 失效
公开(公告)号：US07035194B2
公开(公告)日：2006-04-25
申请号：US10243921
申请日：2002-09-16
申请人： Mizuki Nakamura , Atsushi Kitamura , Kozo Matsumoto , Motoji Egawa
发明人： Mizuki Nakamura , Atsushi Kitamura , Kozo Matsumoto , Motoji Egawa
IPC分类号： G11B7/135
CPC分类号： G11B7/1381 , G11B7/1367 , G11B7/139 , G11B7/1395 , G11B2007/0006 , G11B2007/13727
摘要： An optical pickup apparatus for reading and recording information on recording media includes a semiconductor laser, a collimating lens, a half mirror, a reflecting mirror, and an objective lens. Further included therein are a super-resolution cutoff filter and an aperture control filter, one of which is appropriately selected and set right before the objective lens by a filter switching-over device. When reading the DVD, the super-resolution cutoff filter is set at the optical path, whereas when reading the CD, the aperture control filter is set thereat. The filter switching device is arranged separately from an actuator driving system having the objective lens integrally structured therewith.

3. 发明授权

US06996050B2 Optical pickup apparatus for reading and recording information on recording medium 失效
标题翻译：用于在记录介质上读取和记录信息的光学拾取装置
公开(公告)号：US06996050B2
公开(公告)日：2006-02-07
申请号：US10241550
申请日：2002-09-12
申请人： Mizuki Nakamura , Atsushi Kitamura , Kozo Matsumoto , Motoji Egawa
发明人： Mizuki Nakamura , Atsushi Kitamura , Kozo Matsumoto , Motoji Egawa
IPC分类号： G11B7/00
CPC分类号： G11B7/139 , G11B7/1365 , G11B7/1381 , G11B7/1395 , G11B2007/0006 , G11B2007/13727
摘要： A laser beam emitted from a laser diode and having a wavelength of 780 nm is S-polarized. A polarization plane rotating means (λ/4 phase plate) is disposed between a super-resolution cut-off filter comprising a polarizing filter film and an objective lens. When reading on DVD, the objective lens, the polarization plane rotating means and the super-resolution cut-off filter in combination are set to the optical path. The S-polarized laser beam is focused to a micro spot diameter by super-resolution effects by the super-resolution cut-off filter together with the objective lens. Also, the S-polarized laser beam reflected at a disk and traveling backward along the incoming optical path is converted into a P-polarized laser beam while passing backward through the polarization plane rotating means. The P-polarized laser beam passes through the super-resolution cut-off filter without loss is received by a photo-detector.
摘要翻译：从激光二极管发射并具有780nm波长的激光束是S偏振光。在包括偏振滤光膜和物镜的超分辨率截止滤光器之间设置偏振面旋转装置（λ/ 4相位板）。当在DVD上读取时，将物镜，偏振面旋转装置和超分辨率截止滤光器组合在一起设置为光路。通过超分辨率截止滤光片与物镜的超分辨率效果将S偏光激光束聚焦到微光斑直径。此外，在光盘反射并沿着入射光路向后移动的S偏振激光束在通过偏振面旋转装置的同时被转换成P偏振激光束。 P偏振激光束通过超分辨率截止滤光器，而不损失由光电检测器接收。

4. 发明授权

US07002892B2 Optical pickup reproducing apparatus having reading compatibility among recording media with respective recording densities different from one another 失效
标题翻译：具有在彼此不同的记录密度的记录介质之间具有读取兼容性的光学拾取重放装置
公开(公告)号：US07002892B2
公开(公告)日：2006-02-21
申请号：US10184984
申请日：2002-07-01
申请人： Atsushi Kitamura , Kozo Matsumoto , Motoji Egawa
发明人： Atsushi Kitamura , Kozo Matsumoto , Motoji Egawa
IPC分类号： G11B7/00
CPC分类号： G11B7/1362 , G11B7/1365 , G11B7/1369 , G11B7/139 , G11B2007/0006 , G11B2007/13727
摘要： A liquid crystal element is provided as a polarization plane rotating device between a laser beam source and a beam splitter. Light emitted from the laser beam source passes through the liquid crystal element and the beam splitter, and is converted into parallel light by a collimating lens. The collimated light is incident on a first light-selection device, is reflected at a flat first reflecting surface or a concave second reflecting surface, and is then incident on a super-resolution cut-off filter as a second light-selection device. The light having passed through the second light-selection device is incident on an objective lens, and is converged onto a recording surface. The selection of the reflecting surface of the first light-selection device is determined based on an operation mode of the liquid crystal element.
摘要翻译：液晶元件作为激光束源和分束器之间的偏振面旋转装置。从激光束源发射的光通过液晶元件和分束器，并通过准直透镜转换为平行光。准直光入射到第一光选择装置上，在平坦的第一反射面或凹的第二反射面反射，然后作为第二光选择装置入射到超分辨率截止滤光片上。已经穿过第二光选择装置的光入射到物镜上，并被会聚在记录表面上。基于液晶元件的操作模式来确定第一光选择装置的反射表面的选择。

5. 发明授权

US06930962B2 Optical information reading apparatus with super-resolution cut-off filter 失效
标题翻译：具有超分辨率截止滤光片的光学信息读取装置
公开(公告)号：US06930962B2
公开(公告)日：2005-08-16
申请号：US10237686
申请日：2002-09-10
申请人： Atsushi Kitamura , Kozo Matsumoto , Mizuki Nakamura , Motoji Egawa
发明人： Atsushi Kitamura , Kozo Matsumoto , Mizuki Nakamura , Motoji Egawa
IPC分类号： G11B7/09 , G11B7/00 , G11B7/125 , G11B7/135 , G11B7/095
CPC分类号： B82Y10/00 , G11B7/0903 , G11B7/1365 , G11B7/1381 , G11B2007/0006
摘要： An optical information reading apparatus includes a semiconductor laser, a beam splitter, a collimating lens, a super-resolution cut-off filter, an objective lens having a high numerical aperture, and a photodetector. The super-resolution cut-off filter is disposed immediately in front of the incident side of the objective lens. The photodetector is a well-known eight-division photodetector with a signal processing circuit, reads recorded information and also outputs tracking and focusing control signals to a control circuit. The laser beam is separated into a 0-th order laser beam and ± primary laser beams, which are made incident on the objective lens, pass therethrough, and are made incident on the recording surface of a disk. The 0-th order laser beam is used to read information and to control focussing while the ± primary laser beams are used to control tracking.
摘要翻译：光学信息读取装置包括半导体激光器，分束器，准直透镜，超分辨率截止滤光器，具有高数值孔径的物镜和光电检测器。超分辨率截止滤光器立即设置在物镜的入射侧的前方。光电检测器是具有信号处理电路的众所周知的八分光电检测器，读取记录的信息，并且还将跟踪和聚焦控制信号输出到控制电路。将激光束分离为0级激光束，入射到物镜上的±主激光束通过，并入射到盘的记录面上。当使用±主激光束来控制跟踪时，第0阶激光束用于读取信息并控制聚焦。

6. 发明授权

US07066634B2 Spread illuminating apparatus having light controlling means 失效
标题翻译：具有光控制装置的扩展照明装置
公开(公告)号：US07066634B2
公开(公告)日：2006-06-27
申请号：US10788292
申请日：2004-03-01
申请人： Atsushi Kitamura , Motoji Egawa
发明人： Atsushi Kitamura , Motoji Egawa
IPC分类号： F21V7/04
CPC分类号： G02B6/0028
摘要： A spread illuminating apparatus comprises a plurality of LED's as light sources, a light conductive plate, and a light controlling means disposed between the LED's and the light conductive plate. The light controlling means includes a plurality of transparent resin films which have respective different refractive indexes, which are laminated over one another in a direction parallel to a major surface as a light exit surface of the light conductive plate thereby forming a refractive index profile in the direction parallel to the light exit surface of the light conductive plate, and two adjacent ones of which are put together by adhesive that can transmit light emitted from the LED.
摘要翻译：扩展照明装置包括多个LED作为光源，导光板和设置在LED和导光板之间的光控制装置。光控制装置包括多个具有各自不同折射率的透明树脂膜，它们在与主表面平行的方向上彼此层叠，作为导光板的光出射表面，从而在导光板中形成折射率分布方向平行于导光板的光出射表面，并且其两个相邻的方向通过可以透射从LED发射的光的粘合剂放置在一起。

7. 发明授权

US06616316B2 Spread illuminating apparatus with frame 失效
公开(公告)号：US06616316B2
公开(公告)日：2003-09-09
申请号：US10206338
申请日：2002-07-29
申请人： Kazutoshi Takayanagi , Motoji Egawa
发明人： Kazutoshi Takayanagi , Motoji Egawa
IPC分类号： F21V800
CPC分类号： G02B6/0088 , G02B6/0028 , G02B6/0038
摘要： A spread illuminating apparatus combined with a liquid crystal display via a frame has a reduced thickness as a whole, thereby realizing a natural liquid crystal display image. A light conductive plate has its peripheral portion fitted in a groove of the frame, and a lamp disposed on a side surface of the light conductive plate is housed in the frame. A top side portion of the liquid crystal display is fitted into a cut-away portion of the frame by a predetermined dimension, and a space between a bottom surface of the light conductive plate and a top surface of the liquid crystal display is reduced, whereby the thickness of the entire apparatus is reduced by a dimension of the liquid crystal display fitted into the frame compared with that of the conventional configuration in which the frame is superimposed on the top surface of the liquid crystal display.

8. 发明授权

US06561661B2 Spread illuminating apparatus with a pair of light sources overlapped in a thickness direction of a transparent substrate 失效
公开(公告)号：US06561661B2
公开(公告)日：2003-05-13
申请号：US09985136
申请日：2001-11-01
申请人： Motoji Egawa
发明人： Motoji Egawa
IPC分类号： G01D1128
CPC分类号： G02B6/0028 , G01D11/28 , G02B6/0038 , G02B6/0046 , G02B6/0068 , Y10S385/901
摘要： There is provided a spread illuminating apparatus realizing both uniform light emission and high brightness. Two bar-like light conductive members made of a transparent material and each having a spot-like light source disposed on a large end thereof are disposed so as to overlap with each other in the thickness direction of a transparent substrate, thereby constituting a pair of bar-like light sources. Light emitted from the spot-like light source and entering one light conductive member of the two is directly guided into the transparent substrate without passing through the other light conductive member. Thus, light rays emitted from the two light conductive members do not interfere with each other so as to prevent generation of interference fringes, resulting in that uniform light emission and high brightness in the spread illuminating apparatus can be realized.

9. 发明授权

US6075681A Magnetic head assembly having symmetrically positioned shield rings 失效
标题翻译：磁头组件具有对称定位的屏蔽环
公开(公告)号：US6075681A
公开(公告)日：2000-06-13
申请号：US855558
申请日：1997-06-04
申请人： Motoji Egawa , Kazutoshi Takayanagi
发明人： Motoji Egawa , Kazutoshi Takayanagi
IPC分类号： G11B5/115 , G11B5/11 , G11B5/265 , G11B5/29 , G11B5/105
CPC分类号： G11B5/11
摘要： A magnetic head assembly 1E is constituted in such a manner as a pair of magnetic head mechanisms 3E, 3E, which are formed by accommodating a magnetic head 5 in a shield ring, respectively, are disposed opposite by opposing the proximal end rail 15a and the distal end rail 15b of one magnetic head mechanism 3E to the distal end rail 15b and the proximal end rail 15a of the other magnetic head mechanism 3E, respectively. A pair of shield rings 6,6 are positioned symmetrically with respect to each other (not in off-set). A spacing L.sub.s of a pair of shield rings is shorter than a spacing L.sub.c between the one shield ring 6 and the other magnetic head core 8. The outer magnetic flux .phi. flows to each other shield ring 6, so that the flux .phi..sub.c which flows to the magnetic head core 8 reduces. Thus, the induced voltage in the coil generated by any outer magnetic field is controlled to reduce noise.
摘要翻译：磁头组件1E以如下方式构成：一对磁头机构3E，3E，它们分别通过将磁头5容纳在屏蔽环中而形成，该磁头机构3E，3E分别与相对的基端轨15a和一个磁头机构3E的远端导轨15b分别连接到远端导轨15b和另一个磁头机构3E的近端导轨15a。一对屏蔽环6,6相对于彼此对称地定位（不处于偏移状态）。一对屏蔽环的间隔Ls比一个屏蔽环6和另一个磁头磁芯8之间的间隔Lc短。外部磁通量phi流向彼此的屏蔽环6，从而流过磁通量phi 磁头芯8减小。因此，由任何外部磁场产生的线圈中的感应电压被控制以减少噪声。

10. 发明授权

US5889642A Magnetic head 失效
标题翻译：磁头
公开(公告)号：US5889642A
公开(公告)日：1999-03-30
申请号：US889887
申请日：1997-07-10
申请人： Motoji Egawa , Kazutoshi Takayanagi
发明人： Motoji Egawa , Kazutoshi Takayanagi
IPC分类号： G11B5/60 , G11B5/105 , G11B5/265
CPC分类号： G11B5/2651 , G11B5/105
摘要： A magnetic head includes a slider including rail portions for sliding on a magnetic medium. One rail portion includes inner side walls which define a rectangular hole, and a head core body having magnetic gaps is sealed in the hole with a sealing agent. Projections are formed on the inner side walls to enable proper core positioning in the hole. Multiple projections can be formed on the respective side walls. The projections can have different heights and also be spaced from the head core body in the hole. The projections can include first projections having a height H.sub.1 and second projections having a height H.sub.2 that satisfy the equation 1.2.times.H.sub.1 .ltoreq.H.sub.2 .ltoreq.5.0 H.sub.1. Also, the relative heights of the first and second projections can be related by the inequality, H.sub.2 -H.sub.1 >C-w, in which C is the spacing between projections on opposed inner side walls, and w is the width of the head core body in a direction between the opposed inner side walls.
摘要翻译：磁头包括滑块，其包括用于在磁介质上滑动的轨道部分。一个轨道部分包括限定矩形孔的内侧壁，并且具有磁隙的磁头芯体用密封剂密封在孔中。在内侧壁上形成突出物以使得孔中能够适当地定位芯。可以在各个侧壁上形成多个突起。突起可以具有不同的高度，并且还与孔中的头部芯体间隔开。突起可以包括具有高度H1的第一突起和具有满足方程式1.2×H 1 H 2 = 5.0H 1的高度H2的第二突起。此外，第一和第二突起的相对高度可以通过不等式H2-H1> Cw相关联，其中C是相对的内侧壁上的突起之间的间隔，w是头部芯体的宽度方向在相对的内侧壁之间。

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