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1. 发明申请

US20100135146A1 OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE 有权
标题翻译：光学拾取装置和光盘装置
公开(公告)号：US20100135146A1
公开(公告)日：2010-06-03
申请号：US12598779
申请日：2008-04-17
申请人： Jun-iti Asada , Seiji Nishiwaki , Kazuo Momoo
发明人： Jun-iti Asada , Seiji Nishiwaki , Kazuo Momoo
IPC分类号： G11B7/135
CPC分类号： G11B7/094 , G11B7/1275 , G11B7/131 , G11B7/1353 , G11B7/1381 , G11B2007/0006 , G11B2007/13727
摘要： When first-order diffracted beams leak into a region, which is for receiving only a zeroth-order diffracted beam from an optical disc, due to positional displacement between an objective lens and a hologram element, an offset compensation signal includes an AC component, the offset compensation signal preferably including a DC component only. Accordingly, there may be caused deterioration in a modulation degree of the tracking error (TE) signal. A partial light shielding element 110 is formed on a hologram surface 112a along boundaries between a light receiving region (121a), which receives a zeroth-order diffracted beam, and light receiving regions (121b, 121c), which receive the zeroth-order diffracted beam and first-order diffracted beams, so as to cover the light receiving region (121a). Further, the partial light shielding element 110 shifts phases of transmitted light beams by π, whereby the TE signal is offset-compensated, and the modulation degree can be improved.
摘要翻译：当一级衍射光束由于物镜和全息元件之间的位置偏移而泄漏到仅用于从光盘接收零级衍射光束的区域中时，偏移补偿信号包括AC分量，偏移补偿信号优选地仅包括DC分量。因此，可能导致跟踪误差（TE）信号的调制度的劣化。部分遮光元件110沿着接收零级衍射光束的光接收区域（121a）和接收零级衍射光的受光区域（121b，121c）之间的边界形成在全息图表面112a上光束和一级衍射光束，以覆盖光接收区域（121a）。此外，部分遮光元件110将透射光束的相位移位＆pgr，由此TE信号被偏移补偿，并且可以提高调制度。

2. 发明申请

US20110069597A1 OPTICAL HEAD APPARATUS, HOLOGRAPHIC OPTICAL DEVICE, OPTICAL INTEGRATED DEVICE, OPTICAL INFORMATION PROCESSING APPARATUS, AND SIGNAL DETECTION METHOD 审中-公开
标题翻译：光学头装置，全息光学装置，光学集成装置，光信息处理装置和信号检测方法
公开(公告)号：US20110069597A1
公开(公告)日：2011-03-24
申请号：US12935398
申请日：2010-03-18
申请人： Hiroaki Yamamoto , Jun-iti Asada
发明人： Hiroaki Yamamoto , Jun-iti Asada
IPC分类号： G11B7/00 , G02B5/32
CPC分类号： G11B7/1353 , G11B7/0906 , G11B7/0909 , G11B7/0943
摘要： An optical head apparatus including a holographic optical device which diffracts a light beam and includes a first diffraction region and a second diffraction region facing each other across a region dividing line passing through an optical axis of a light-collection optical system and extending in a radial direction of an optical disc, the first diffraction region having a grating pattern for generating diffracted light having a first wavefront and entering a first photoreception region and a second photoreception region, the second diffraction region having a grating pattern for generating diffracted light having a second wavefront and entering a third photoreception region and a fourth photoreception region, the first and second wavefronts having first and second coma aberrations in the radial direction of the optical disc, respectively, and the first and second coma aberrations having axes located off the optical axis.
摘要翻译：一种光学头装置，包括衍射光束并包括第一衍射区域和第二衍射区域的全息光学装置，所述第一衍射区域和第二衍射区域跨越通过光收集光学系统的光轴并沿径向延伸的区域划分线所述第一衍射区域具有用于产生具有第一波前并进入第一光接收区域和第二光接收区域的衍射光的光栅图案，所述第二衍射区域具有用于产生具有第二波前的衍射光的光栅图案并且进入第三光接收区域和第四光接收区域，所述第一和第二波前分别在所述光盘的径向方向上具有第一和第二彗形像差，并且所述第一和第二彗形像差具有位于所述光轴的轴线。

3. 发明授权

US08000184B2 Optical pickup device and optical disc device with offset compensation 有权
标题翻译：具有偏移补偿的光学拾取装置和光盘装置
公开(公告)号：US08000184B2
公开(公告)日：2011-08-16
申请号：US12598779
申请日：2008-04-17
申请人： Jun-iti Asada , Seiji Nishiwaki , Kazuo Momoo
发明人： Jun-iti Asada , Seiji Nishiwaki , Kazuo Momoo
IPC分类号： G11B7/00
CPC分类号： G11B7/094 , G11B7/1275 , G11B7/131 , G11B7/1353 , G11B7/1381 , G11B2007/0006 , G11B2007/13727
摘要： When first-order diffracted beams leak into a region, which is for receiving only a zeroth-order diffracted beam from an optical disc, due to positional displacement between an objective lens and a hologram element, an offset compensation signal includes an AC component, the offset compensation signal preferably including a DC component only. Accordingly, there may be caused deterioration in a modulation degree of the tracking error (TE) signal. A partial light shielding element 110 is formed on a hologram surface 112a along boundaries between a light receiving region (121a), which receives a zeroth-order diffracted beam, and light receiving regions (121b, 121c), which receive the zeroth-order diffracted beam and first-order diffracted beams, so as to cover the light receiving region (121a). Further, the partial light shielding element 110 shifts phases of transmitted light beams by π, whereby the TE signal is offset-compensated, and the modulation degree can be improved.
摘要翻译：当一级衍射光束由于物镜和全息元件之间的位置偏移而泄漏到仅用于从光盘接收零级衍射光束的区域中时，偏移补偿信号包括AC分量，偏移补偿信号优选仅包括DC分量。因此，可能导致跟踪误差（TE）信号的调制度的劣化。部分遮光元件110沿着接收零级衍射光束的光接收区域（121a）和接收零级衍射光的受光区域（121b，121c）之间的边界形成在全息图表面112a上光束和一级衍射光束，以覆盖光接收区域（121a）。此外，部分遮光元件110将透射光束的相位移位＆pgr，由此TE信号被偏移补偿，并且可以提高调制度。

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