公开(公告)号：US20090268585A1

公开(公告)日：2009-10-29

申请号：US12497194

申请日：2009-07-02

申请人： Yukihiro TAO ,  Hiromasa SATO ,  Atsushi KOYANAGI ,  Koji MIYASAKA

发明人： Yukihiro TAO ,  Hiromasa SATO ,  Atsushi KOYANAGI ,  Koji MIYASAKA

IPC分类号： G11B7/135

CPC分类号： G02B5/3083 ,  G11B7/1275 ,  G11B7/1365 ,  G11B7/1369 ,  G11B2007/0006

摘要： An optical rotating plate has an optical rotating material layer. A phase plate is provided on a first surface side of the optical rotating plate and has at least one birefringent material layer. The first surface side is disposed toward an emitting side of an optical path, thereby giving different phase differences to a first linearly polarized light group containing at least a linearly polarized light having a first wavelength and a second linearly polarized light group containing at least a linearly polarized light having a second wavelength which is different from the first wavelength.

摘要翻译： 光学旋转板具有光学旋转材料层。 相位板设置在旋转旋转板的第一表面侧，并具有至少一个双折射材料层。 第一表面侧朝向光路的发射侧设置，从而给至少包含具有第一波长的线偏振光的第一线偏振光组和至少包含线性偏振光的第二线偏振光组赋予不同的相位差 具有不同于第一波长的第二波长的偏振光。

公开(公告)号：US20080316600A1

公开(公告)日：2008-12-25

申请号：US12139827

申请日：2008-06-16

申请人： Atsushi KOYANAGI ,  Hiromasa SATO ,  Yukihiro TAO ,  Koji MIYASAKA

发明人： Atsushi KOYANAGI ,  Hiromasa SATO ,  Yukihiro TAO ,  Koji MIYASAKA

IPC分类号： G02B5/18

CPC分类号： G02B5/1871 ,  G11B7/1353

摘要： The present invention provides a wavelength-selective diffraction element, configured such that light having a plurality of wavelengths are incident thereon as incident light, which is provided with: a transparent substrate; a concavo-convex part, formed on the transparent substrate such that concave portions and convex portions are cyclically extended in one direction, and comprised of a first material which is optically isotropic; and a filling part, filling at least the concave portions and comprised of a second material which is optically isotropic. The first material and the second material have no absorbance with respect to the wavelengths of the incident light. The first material and the second material have an identical refractive index with respect to light having a first wavelength which is at least one of the wavelengths of the incident light. The first material and the second material have different refractive indices with respect to light having a second wavelength which is at least one of the wavelengths of the incident light and different from the first wavelength.

摘要翻译： 本发明提供一种波长选择性衍射元件，其被配置为使得具有多个波长的光作为入射光入射，其设置有：透明基板; 形成在透明基板上的凹凸部，使得凹部和凸部在一个方向上循环延伸，并且由光学各向同性的第一材料构成; 和填充部分，至少填充凹部并由光学各向同性的第二材料构成。 第一材料和第二材料相对于入射光的波长没有吸光度。 第一材料和第二材料相对于具有入射光的至少一个波长的第一波长的光具有相同的折射率。 第一材料和第二材料相对于具有入射光的波长和第一波长的至少一个波长的第二波长的光具有不同的折射率。

公开(公告)号：US20090016191A1

公开(公告)日：2009-01-15

申请号：US12211461

申请日：2008-09-16

申请人： Koichi MURATA ,  Yoshiharu OOI ,  Yukihiro TAO ,  Koji MIYASAKA

发明人： Koichi MURATA ,  Yoshiharu OOI ,  Yukihiro TAO ,  Koji MIYASAKA

IPC分类号： G11B7/00

CPC分类号： G11B7/1367 ,  G11B7/1353 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/1381 ,  G11B2007/0013

摘要： It is provided an optical head device which includes: a light source; an objective lens, configured to converge light emitted from the light source to an information recording surface of an optical disk; a beam splitter, configured to deflect returned light reflected by the optical disk into an optical path which is different from an optical path of the light emitted from the light source; a photo detector, configured to detect the returned light deflected by the beam splitter; and a depolarizing element, disposed on an optical path between the beam splitter and the photo detector, and configured to cause the returned light to transmit through while reducing a degree of polarization of the returned light.

摘要翻译： 提供了一种光学头装置，其包括：光源; 物镜，被配置为将从光源发射的光会聚到光盘的信息记录表面; 分束器，被配置为将由光盘反射的返回光偏转成与从光源发射的光的光路不同的光路; 光检测器，被配置为检测由分束器偏转的返回光; 以及去极化元件，设置在分束器和光电检测器之间的光路上，并且被配置为使返回光透过，同时减少返回光的偏振度。

公开(公告)号：US20100260030A1

公开(公告)日：2010-10-14

申请号：US12823162

申请日：2010-06-25

申请人： Yukihiro TAO ,  Kenichi Yuyama

发明人： Yukihiro TAO ,  Kenichi Yuyama

IPC分类号： G11B7/135 ,  G02F1/13 ,  G02F1/133

CPC分类号： G11B7/1353 ,  G02B5/1828 ,  G02B5/3016 ,  G02B5/3083 ,  G02B26/0808 ,  G02F1/13 ,  G02F1/133365 ,  G02F1/133371 ,  G02F1/1337 ,  G02F1/133707 ,  G02F1/31 ,  G02F2001/133726 ,  G02F2001/13706 ,  G02F2001/13712 ,  G02F2201/305 ,  G02F2203/28 ,  G11B7/1369

摘要： A liquid crystal element includes: a transparent substrate; and a liquid crystal layer including: a liquid crystal material; and a concavo-convex portion including periodic concaves and convexes, wherein the concavo-convex portion is aligned so that a longitudinal direction of liquid crystal molecules that are positioned on a side of the transparent substrate and on a concavo-convex surface that is an interface of the concavo-convex portion substantially becomes a vertical direction with respect to a concavo-convex surface on the side of the transparent substrate, or a longitudinal direction of liquid crystal molecules that are positioned on a side, in which a medium is disposed and which is opposite to the transparent substrate, and on the concavo-convex surface that is the interface of the concavo-convex portion substantially becomes the vertical direction with respect to a concavo-convex surface on the side, in which the medium is disposed, to form a diffraction grating.

摘要翻译： 液晶元件包括：透明基板; 和液晶层，包括：液晶材料; 以及包括周期性凹凸的凹凸部，其中，所述凹凸部对准，使得位于所述透明基板的一侧的液晶分子的纵向方向和作为界面的凹凸面 相对于透明基板一侧的凹凸面或位于配置有介质的一侧的液晶分子的纵向方向，凹凸部基本上成为垂直方向，哪个 与透明基板相对，并且作为凹凸部的界面的凹凸面基本上成为相对于设置介质的一侧的凹凸面的垂直方向，形成 衍射光栅。