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1. 发明授权

US5009490A Photo-conductive liquid crystal light valve 失效
标题翻译：光导液晶光阀
公开(公告)号：US5009490A
公开(公告)日：1991-04-23
申请号：US363825
申请日：1989-06-09
申请人： Tomomitsu Kouno , Hideki Hatano , Takashi Yamaji , Sakashi Ootaki , Masami Nishida
发明人： Tomomitsu Kouno , Hideki Hatano , Takashi Yamaji , Sakashi Ootaki , Masami Nishida
IPC分类号： G02F1/1335 , G02F1/13357 , G02F1/135
CPC分类号： G02F1/135
摘要： A photo-conductive liquid crystal display in which the liquid crystal light valve and the electroluminescence element are disposed integrally with each other. The photo-conductive liquid crystal light valve is arranged such that a pair of transparent electrodes are disposed on the outside of a lamination of a photo-conductive layer and a liquid crystal layer, and an electroluminescence element is disposed on the outside of the transparent electrode which is disposed on the writing side of the device.
摘要翻译：其中液晶光阀和电致发光元件彼此一体地设置的光导液晶显示器。导光性液晶光阀配置成在透明电极层和液晶层的层叠体的外侧配置一对透明电极，在透明电极的外侧配置电致发光元件其设置在装置的书写侧。

2. 发明授权

US5673246A Optical pickup device 失效
标题翻译：光学拾取装置
公开(公告)号：US5673246A
公开(公告)日：1997-09-30
申请号：US660472
申请日：1996-06-07
申请人： Sakashi Ootaki , Ryo Sato
发明人： Sakashi Ootaki , Ryo Sato
IPC分类号： G11B7/09 , G11B7/095 , G11B7/125 , G11B7/135
CPC分类号： G11B7/1372 , G11B7/1398 , G11B7/0956
摘要： An optical pickup device which makes a numerical aperture of an object lens in a radial direction of an optical disk smaller than that in a tangential direction to a track on the optical disk. With this feature, a spot diameter in the tangential direction to the track becomes smaller than that in the radial disk in the data recorded surface thereof, and it is possible to prevent degradation of a MTF as well as to accurately read data recorded in the high-density optical disk.
摘要翻译：一种光学拾取装置，其使得在光盘的径向上的物镜的数值孔径小于在光盘上的轨道的切线方向上的数字孔径。利用该特征，与轨道的切线方向上的光点直径比数据记录表面中的径向盘中的光斑直径小，并且可以防止MTF的劣化，并且能够准确地读取记录在高位的数据密度光盘。

3. 发明授权

US5936923A Optical pickup with aberration correcting panel including a liquid crystal 失效
标题翻译：具有包括液晶的像差校正面板的光学拾取器
公开(公告)号：US5936923A
公开(公告)日：1999-08-10
申请号：US696787
申请日：1996-08-14
申请人： Sakashi Ootaki , Masayuki Iwasaki
发明人： Sakashi Ootaki , Masayuki Iwasaki
IPC分类号： G02F1/13 , G11B7/00 , G11B7/125 , G11B7/135
CPC分类号： G11B7/1369 , G11B7/13927 , G02F2203/18 , G11B2007/0006
摘要： An optical pickup which is designed to correct coma aberration and spherical aberration as well as aberration caused by the relative positional deviation of an objective lens to an aberration correcting liquid crystal panel by using this liquid crystal panel and which is thus compatible to both DVDs and CDs. In the optical pickup having at least a laser light source and an objective lens, an aberration correcting liquid crystal panel is arranged on the optical axis of a laser beam and a transparent electrode of this liquid crystal panel is divided into segments in a predetermined pattern like the cross pattern of a chessboard, and voltages to be applied to the individual segments are variably controlled by a liquid crystal panel controller to alter the refractive index of each segment, thus correcting aberration.
摘要翻译：一种光学拾取器，其被设计成通过使用该液晶面板来校正彗差和球面像差以及由物镜相对于像差校正液晶面板的相对位置偏差引起的像差，并因此与DVD和CD兼容。在至少具有激光光源和物镜的光学拾取器中，在激光束的光轴上配置像差校正液晶面板，将该液晶面板的透明电极分割为规定图案的片段，如棋盘的交叉图案和施加到各个段的电压由液晶面板控制器可变地控制，以改变每个段的折射率，从而校正像差。

4. 发明授权

US6151154A Optical pickup, aberration correction unit and astigmatism measurement method 有权
标题翻译：光学拾取，像差校正单元和像散测量方法
公开(公告)号：US6151154A
公开(公告)日：2000-11-21
申请号：US265892
申请日：1999-03-11
申请人： Masakazu Ogasawara , Yoshitsugu Araki , Sakashi Ootaki , Junichi Furukawa , Kiyoshi Tateishi
发明人： Masakazu Ogasawara , Yoshitsugu Araki , Sakashi Ootaki , Junichi Furukawa , Kiyoshi Tateishi
IPC分类号： G02F1/1343 , G02F1/139 , G11B7/00 , G11B7/135 , G02F1/01
CPC分类号： G11B7/13925 , G02F1/134309 , G02F1/1393 , G11B7/1369 , G02F2203/18 , G11B2007/0006
摘要： An optical pickup includes: a light source, an object lens, and an aberration correction unit for correcting aberration by giving a phase difference to a light beam. The aberration correction unit corrects astigmatism caused by an optical system of the optical pickup.
摘要翻译：光学拾取器包括：光源，物镜，以及用于通过给光束赋予相位差来校正像差的像差校正单元。像差校正单元校正由光学拾取器的光学系统引起的像散。

5. 发明授权

US6078554A Wave-front aberration compensation unit, wave-front aberration compensation device, and optical pickup 失效
标题翻译：波前像差补偿单元，波前像差补偿装置和光学拾取器
公开(公告)号：US6078554A
公开(公告)日：2000-06-20
申请号：US848655
申请日：1997-04-29
申请人： Sakashi Ootaki , Masayuki Iwasaki , Masakazu Ogasawara
发明人： Sakashi Ootaki , Masayuki Iwasaki , Masakazu Ogasawara
IPC分类号： G02F1/01 , G02F1/13 , G11B7/00 , G11B7/095 , G11B7/125 , G11B7/135
CPC分类号： G11B7/0956 , G11B7/1369 , G11B7/13927 , G11B2007/0006 , G11B2007/13727 , G11B7/0948
摘要： An LCD panel will rotate based on an external control signal by a prescribed angle such portion of light flux, that enters an objective lens, corresponding to a predetermined incident point and, at the same time, will change by a prescribed length an optical path of this portion of optical flux whose aberrations are in excess of a prescribed standard value. It is thus possible to compensate the wave-front aberrations due to the differences in the effective optical-path length and also to control the effective numerical aperture of the objective lens by utilizing linearly polarized light as the light to be emitted from the laser beam source. It is also possible to compensate the aberrations due the differences in the substrate thickness of the optical recording medium and those due to a tilt of the optical recording medium.
摘要翻译： LCD面板将根据外部控制信号以预定角度旋转对应于预定入射点的进入物镜的光束部分，并且同时将改变预定长度的光路的光路这部分光通量的像差超过规定的标准值。因此，可以补偿由于有效光路长度的差异引起的波前像差，并且还可以通过利用线偏振光作为从激光束源发射的光来控制物镜的有效数值孔径。也可以补偿光记录介质的基板厚度的差异和由于光记录介质的倾斜导致的像差。

6. 发明授权

US5734637A Optical pickup used with both DVD and CD 失效
公开(公告)号：US5734637A
公开(公告)日：1998-03-31
申请号：US686920
申请日：1996-08-01
申请人： Sakashi Ootaki , Masayuki Iwasaki
发明人： Sakashi Ootaki , Masayuki Iwasaki
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/139 , G11B7/1369 , G11B2007/0006
摘要： An optical pickup of a compatible type which can be switched for a DVD and a CD by a completely electrical control without the need of a mechanical moving device or the like and is suitable for the reduction in size and also has an excellent efficiency in the use of light. A liquid crystal panel of a transmission type which gives a phase difference of a 1/4 wavelength or a wavelength that is an odd number multiple of 1/4 wavelength to a transmission light and has a transparent electrode having an aperture pattern of a predetermined shape is used and the liquid crystal panel is arranged so that its plane of polarization crosses a plane of polarization of a polarization beam splitter at a predetermined angle. An applied voltage to the transparent electrode is controlled so that the whole surface of the liquid crystal panel functions as a 1/4 wavelength plate during a reproduction operation or a recording operation of the DVD and only the aperture pattern portion functions as a 1/4 wavelength plate during the reproduction operation of the CD.

7. 发明授权

US5459593A Reflection type liquid crystal display apparatus which prevents rotation of the polarization plane 失效
标题翻译：防止偏振面旋转的反射型液晶显示装置
公开(公告)号：US5459593A
公开(公告)日：1995-10-17
申请号：US160254
申请日：1993-12-02
申请人： Sakashi Ootaki
发明人： Sakashi Ootaki
IPC分类号： G02B27/28 , G02F1/13 , G02F1/1335 , G03B21/00
CPC分类号： G02F1/133553 , G02F1/133533 , G02F1/133536 , G02F2001/13355
摘要： A reflecting type liquid crystal display apparatus which can prevent an unnecessary rotation of the plane of polarization in a polarizing prism. The apparatus has: a reflecting type liquid crystal device for changing a polarizing state in accordance with an image, thereby reflecting an incident light; and a polarizing prism 50 for emitting the light of a predetermined polarized component in the incident light from a light source at a surface of polarization operation, for inputting the emitted light into the reflecting type liquid crystal device, for emitting the light of a predetermined polarized component in the incident light from the reflecting type liquid crystal device, thereby obtaining a projection image. A plate for compensating the polarizing state having a surface in an oblique direction different from an oblique direction of the surface of polarization operation and also having a predetermined phase difference is arranged in an optical path between the reflecting type liquid crystal device and the polarizing prism.
摘要翻译：一种反射型液晶显示装置，其能够防止极化棱镜中的偏振面的不必要的旋转。该装置具有：反射型液晶装置，用于根据图像改变偏振状态，从而反射入射光; 以及偏振棱镜50，用于在偏光操作的表面处发射来自光源的入射光中的预定偏振分量的光，用于将发射的光输入到反射型液晶装置中，用于发射预定极化的光在反射型液晶装置的入射光中成分，从而获得投影图像。在反射型液晶装置和偏振棱镜之间的光路中配置有用于补偿具有与偏振光操作的表面的倾斜方向不同的倾斜方向并且具有预定相位差的表面的偏光状态的板。

8. 发明授权

US5949748A Optical write/read head with a pretilted liquid crystal panel 失效
标题翻译：带预倾斜液晶面板的光写/读头
公开(公告)号：US5949748A
公开(公告)日：1999-09-07
申请号：US815084
申请日：1997-03-11
申请人： Masayuki Iwasaki , Sakashi Ootaki
发明人： Masayuki Iwasaki , Sakashi Ootaki
IPC分类号： G02F1/13 , G11B7/00 , G11B7/125 , G11B7/135 , G11B19/12
CPC分类号： G11B7/1369 , G11B19/12 , G11B2007/0006 , G11B2007/13727
摘要： A compatible optical pickup for DVD and CD in which, between an objective lens and a polarizing beam splitter, there is disposed a transmission type liquid crystal panel which has transparent electrodes formed with an aperture pattern having a predetermined configuration which gives transmitted light a phase difference, such as 1/4 of a wavelength or an odd multiple thereof. The liquid crystal panel is tilted and disposed with a predetermined angle between an objective lens and said laser light source for causing a phase difference in a laser beam emitted from said laser light source, whereby the liquid crystal panel is tilted with a predetermined pretilted angle .theta. so that liquid crystal molecules are aligned, in perpendicular relation to (for P-type liquid crystal) or in parallel relation with (for N-type liquid crystal) an optical axis of the objective lens at the time when no voltage is applied.
摘要翻译：一种用于DVD和CD的兼容光学拾取器，其中在物镜和偏振光束分离器之间设置透射型液晶面板，透明电极形成有具有预定构造的孔径图案，透射光使相位差，例如波长的+ E，fra 1/4 + EE或其奇数倍。液晶面板在物镜和激光光源之间以预定角度倾斜设置，用于使从所述激光光源发射的激光束产生相位差，由此液晶面板以预定的预倾角θ 使得液晶分子与（对于P型液晶）垂直关系或与（对于N型液晶）与物镜的光轴在没有施加电压时的光轴成直线对准。

9. 发明授权

US5901131A Optical pickup used with both DVD and CD 失效
公开(公告)号：US5901131A
公开(公告)日：1999-05-04
申请号：US993709
申请日：1997-12-18
申请人： Sakashi Ootaki , Masayuki Iwasaki
发明人： Sakashi Ootaki , Masayuki Iwasaki
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/139 , G11B7/1369 , G11B2007/0006
摘要： An optical pickup of a compatible type which can be switched for a DVD and a CD by a completely electrical control without the need of a mechanical moving device or the like and is suitable for the reduction in size and also has an excellent efficiency in the use of light. A liquid crystal panel of a transmission type which gives a phase difference of a 1/4 wavelength or a wavelength that is an odd number multiple of 1/4 wavelength to a transmission light and has a transparent electrode having an aperture pattern of a predetermined shape is used and the liquid crystal panel is arranged so that its plane of polarization crosses a plane of polarization of a polarization beam splitter at a predetermined angle. An applied voltage to the transparent electrode is controlled so that the whole surface of the liquid crystal panel functions as a 1/4 wavelength plate during a reproduction operation or a recording operation of the DVD and only the aperture pattern portion functions as a 1/4 wavelength plate during the reproduction operation of the CD.

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