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公开(公告)号：US07894133B2
公开(公告)日：2011-02-22
申请号：US11868048
申请日：2007-10-05
IPC分类号： G02B5/30
CPC分类号： G02B5/1809 , G02B5/1866 , G02B5/3083
摘要： A disclosed optical element includes: a transparent substrate; a subwavelength structure layer disposed on the transparent substrate, the subwavelength structure layer having a refractive index different from a refractive index of the transparent substrate; a minute concave and convex structure of one-dimensional grating formed on the subwavelength structure layer with a subwavelength period smaller than a wavelength to be used, where a concave portion reaches a boundary surface between the transparent substrate and the subwavelength structure layer; and an open hole portion formed on a subwavelength structure layer side of the transparent substrate so as to communicate with the concave portion of the minute structure and to be arranged with the same period as in the minute structure of one-dimensional grating. At least at the open hole portion, a refractive index relative to an incident light is changed in a direction orthogonal to the boundary surface.
摘要翻译： 所公开的光学元件包括：透明基板; 设置在所述透明基板上的亚波长结构层，所述亚波长结构层的折射率不同于所述透明基板的折射率; 形成在亚波长结构层上的亚波长时间段小于要使用的波长的一维光栅的微小凹凸结构，其中凹部到达透明基板和亚波长结构层之间的边界面; 以及开口部，形成在透明基板的亚波长结构层侧，以与微细结构的凹部连通并且与一维光栅的微小结构相同的周期配置。 至少在开孔部分，相对于入射光的折射率在与边界表面正交的方向上变化。
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公开(公告)号：US20080106789A1
公开(公告)日：2008-05-08
申请号：US11868048
申请日：2007-10-05
IPC分类号： G02B5/18
CPC分类号： G02B5/1809 , G02B5/1866 , G02B5/3083
摘要： A disclosed optical element includes: a transparent substrate; a subwavelength structure layer disposed on the transparent substrate, the subwavelength structure layer having a refractive index different from a refractive index of the transparent substrate; a minute concave and convex structure of one-dimensional grating formed on the subwavelength structure layer with a subwavelength period smaller than a wavelength to be used, where a concave portion reaches a boundary surface between the transparent substrate and the subwavelength structure layer; and an open hole portion formed on a subwavelength structure layer side of the transparent substrate so as to communicate with the concave portion of the minute structure and to be arranged with the same period as in the minute structure of one-dimensional grating. At least at the open hole portion, a refractive index relative to an incident light is changed in a direction orthogonal to the boundary surface.
摘要翻译： 所公开的光学元件包括：透明基板; 设置在所述透明基板上的亚波长结构层，所述亚波长结构层的折射率不同于所述透明基板的折射率; 形成在亚波长结构层上的亚波长时间段小于要使用的波长的一维光栅的微小凹凸结构，其中凹部到达透明基板和亚波长结构层之间的边界面; 以及开口部，形成在透明基板的亚波长结构层侧，以与微细结构的凹部连通并且与一维光栅的微小结构相同的周期配置。 至少在开孔部分，相对于入射光的折射率在与边界表面正交的方向上变化。
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公开(公告)号：US20070217011A1
公开(公告)日：2007-09-20
申请号：US11709862
申请日：2007-02-23
申请人： Yoshiyuki Kiyosawa , Hideaki Hirai
发明人： Yoshiyuki Kiyosawa , Hideaki Hirai
IPC分类号： G02B27/28
CPC分类号： G02B27/285 , G02B26/06
摘要： An optical element with a phase structure configured to provide a phase difference between a first polarization component of light and a second polarization component of the light which is orthogonal to the first polarization component, is provided, in which the phase structure includes a first fine periodic structure which includes plural first dielectric plates with a first thickness and a first refractive index which are periodically arranged in a first fine period and a second fine periodic structure which includes plural second dielectric plates with a second thickness and a second refractive index which are periodically arranged in a second fine period, wherein a refractive index of a medium between the plural first dielectric plates and a refractive index of a medium between the plural second dielectric plates are different from the first refractive index and the second refractive index, and at least one of, the first fine period and the second fine period, a ratio of the first thickness to the first fine period and a ratio of the second thickness to the second fine period, and the first refractive index and the second refractive index, is different from each other.
摘要翻译： 具有相位结构的光学元件被配置为提供光的第一偏振分量和与第一偏振分量正交的光的第二偏振分量之间的相位差，其中相位结构包括第一精细周期 结构，其包括具有第一厚度和第一折射率的多个第一电介质板，其在第一精细周期中周期性地布置;以及第二微细周期结构，其包括具有第二厚度和第二折射率的多个第二电介质板， 在第二精细周期中，多个第一电介质板之间的介质的折射率与多个第二电介质板之间的介质的折射率不同于第一折射率和第二折射率，以及至少一个 ，第一罚款期和第二罚款期间，第一罚款期和第二罚款期 第一精细周期的厚度和第二厚度与第二细小周期的比率以及第一折射率和第二折射率彼此不同。
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公开(公告)号：US08259555B2
公开(公告)日：2012-09-04
申请号：US12531193
申请日：2008-04-15
CPC分类号： G11B7/1353 , G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： A disclosed optical pickup includes an aberration correction unit with a phase shifter surface. On the phase shifter surface, rectangular or staircase-like steps are formed in a concentric manner around an optical axial center, in certain regions where a light beam passes through. The steps have different heights in the optical axial direction. A light beam having a wavelength of 405 nm is directly transmitted through the steps so that a phase difference is applied for correcting spherical aberration that occurs on a first optical recording medium. A light beam that passes through an annular region without any steps is focused on a second optical recording medium. A light beam that passes through an outside region is focused by an object lens on the second optical recording medium, and is not focused on the first optical recording medium.
摘要翻译： 所公开的光拾取器包括具有移相器表面的像差校正单元。 在移相器表面上，在光束通过的某些区域中，围绕光轴心同心地形成矩形或阶梯状台阶。 台阶在光轴方向具有不同的高度。 波长为405nm的光束直接透过该步骤，使得施加相位差来校正出现在第一光学记录介质上的球面像差。 通过没有任何步骤的环形区域的光束被聚焦在第二光学记录介质上。 通过外部区域的光束被物镜聚焦在第二光学记录介质上，并且不聚焦在第一光学记录介质上。
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5.发明授权Optical element, polarization filter, optical isolator, and optical apparatus 有权光学元件，偏振滤光器，光隔离器和光学设备公开(公告)号：US08830585B2
公开(公告)日：2014-09-09
申请号：US13255171
申请日：2010-04-06
CPC分类号： G02B27/28 , G02B5/3025
摘要： An optical element transmits incident light having a particular polarization direction mainly by 0-order transmission and diffracts incident light having a perpendicular polarization direction. The optical element includes a periodic structure having a period equal to or greater than the wavelength of the incident light. The periodic structure includes first and second subwavelength concave-convex structures formed perpendicularly adjacent to each other in each period of the periodic structure. The first and the second subwavelength concave-convex structures have a period less than the wavelength of the incident light. A filling factor and a groove depth of the first and the second subwavelength concave-convex structures are determined such that they have the same effective refraction index with respect to the incident light having the particular polarization direction and a phase difference π with respect to the incident light having the particular polarization direction.
摘要翻译： 光学元件主要通过0阶透射来透射具有特定偏振方向的入射光，并衍射具有垂直偏振方向的入射光。 光学元件包括具有等于或大于入射光的波长的周期的周期性结构。 周期性结构包括在周期性结构的每个周期中彼此垂直相邻形成的第一和第二亚波长凹凸结构。 第一和第二亚波长凹凸结构的周期小于入射光的波长。 确定第一和第二亚波长凹凸结构的填充因子和凹槽深度，使得它们相对于具有特定偏振方向的入射光和相位差pgr具有相同的有效折射率; 相对于具有特定偏振方向的入射光。
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公开(公告)号：US08178010B2
公开(公告)日：2012-05-15
申请号：US12712308
申请日：2010-02-25
申请人： Hideaki Hirai , Kazuhiro Umeki
发明人： Hideaki Hirai , Kazuhiro Umeki
CPC分类号： G11B7/139 , G02B5/1809 , G02B5/1847 , G02B27/4238 , G11B7/123 , G11B7/1353 , G11B7/1381 , G11B2007/0006
摘要： An optical device having a sub-wavelength grating formed in a specified region is disclosed that is able to prevent wave front degradation accompanying a phase difference of a polarized light beam passing through the optical device. The optical device includes a circular-belt-like region where the sub-wavelength diffraction grating is formed, and a center portion where the sub-wavelength diffraction grating is not formed. A vertically polarized light beam used for operations on a blue-light optical recording medium A has a phase difference in the sub-wavelength diffraction grating to be an integral multiple of 2π and hence is transmitted through the sub-wavelength diffraction grating. A horizontally polarized light beam used for operations on a blue-light optical recording medium is diffracted by the sub-wavelength diffraction grating. The light path length L1 of the light beam passing through the circular-belt-like region is the same as that of the light beam passing through the center portion without the sub-wavelength grating.
摘要翻译： 公开了一种具有形成在特定区域中的子波长光栅的光学器件，其能够防止伴随通过光学器件的偏振光束的相位差的波前劣化。 光学器件包括形成亚波长衍射光栅的圆形带状区域和未形成亚波长衍射光栅的中心部分。 用于在蓝光光记录介质A上操作的垂直偏振光束在亚波长衍射光栅中的相位差为2＆pgr的整数倍; 因此通过亚波长衍射光栅传输。 用于在蓝光光记录介质上操作的水平偏振光束被亚波长衍射光栅衍射。 通过圆形带状区域的光束的光路长度L1与没有亚波长光栅的通过中心部分的光束的光路长度L1相同。
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7.发明申请Optical device, method of producing the same, optical pickup, and optical information processing device 失效光学装置及其制造方法，光学拾取器和光学信息处理装置公开(公告)号：US20050195485A1
公开(公告)日：2005-09-08
申请号：US11068348
申请日：2005-03-01
申请人： Hideaki Hirai , Kazuhiro Umeki
发明人： Hideaki Hirai , Kazuhiro Umeki
CPC分类号： G11B7/139 , G02B5/1809 , G02B5/1847 , G02B27/4238 , G11B7/123 , G11B7/1353 , G11B7/1381 , G11B2007/0006
摘要： An optical device having a sub-wavelength grating formed in a specified region is disclosed that is able to prevent wave front degradation accompanying a phase difference of a polarized light beam passing through the optical device. The optical device includes a circular-belt-like region where the sub-wavelength diffraction grating is formed, and a center portion where the sub-wavelength diffraction grating is not formed. A vertically polarized light beam used for operations on a blue-light optical recording medium A has a phase difference in the sub-wavelength diffraction grating to be an integral multiple of 2π and hence is transmitted through the sub-wavelength diffraction grating. A horizontally polarized light beam used for operations on a blue-light optical recording medium is diffracted by the sub-wavelength diffraction grating. The light path length L1 of the light beam passing through the circular-belt-like region is the same as that of the light beam passing through the center portion without the sub-wavelength grating.
摘要翻译： 公开了一种具有形成在特定区域中的子波长光栅的光学器件，其能够防止伴随通过光学器件的偏振光束的相位差的波前劣化。 光学器件包括形成亚波长衍射光栅的圆形带状区域和未形成亚波长衍射光栅的中心部分。 用于在蓝光光记录介质A上的操作的垂直偏振光束在亚波长衍射光栅中的相位差为2pi的整数倍，因此通过亚波长衍射光栅透射。 用于在蓝光光记录介质上操作的水平偏振光束被亚波长衍射光栅衍射。 通过圆形带状区域的光束的光路长度L 1与没有亚波长光栅的通过中心部分的光束的光程长度L 1相同。
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8.发明授权Reflecting wavelength plate and optical pickup using reflecting wavelength plate 有权使用反射波片反射波长板和光学拾取器公开(公告)号：US08154977B2
公开(公告)日：2012-04-10
申请号：US12842369
申请日：2010-07-23
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/1362 , G11B7/1367 , G11B2007/0006
摘要： Disclosed is a reflecting wavelength plate that deflects and reflects a light path and adds a phase difference with respect to plural incident light having different wavelengths. The reflecting wavelength plate includes a substrate; a reflecting film laminated on the substrate; and a sub-wavelength concavo-convex structure that is laminated on the reflecting film and has a pitch less than or equal to the shortest wavelength of the plural incident light. The filling factor and the groove depth of the sub-wavelength concavo-convex structure are determined so as to add the phase difference obtained by (kπ)/8, where k is an integer, to the plural incident light having the different wavelengths.
摘要翻译： 公开了一种反射波长板，其使光路偏转并反射，并且相对于具有不同波长的多个入射光增加相位差。 反射波长板包括基板; 层叠在基板上的反射膜; 以及层叠在反射膜上并具有小于或等于多个入射光的最短波长的间距的亚波长凹凸结构。 确定亚波长凹凸结构的填充因子和凹槽深度，以便将具有不同波长的多个入射光中的（k＆pgr）/ 8（其中k是整数）获得的相位差相加。
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9.发明申请OPTICAL ELEMENT, POLARIZATION FILTER, OPTICAL ISOLATOR, AND OPTICAL APPARATUS 有权光学元件，偏振滤光片，光学隔离器和光学设备公开(公告)号：US20120002280A1
公开(公告)日：2012-01-05
申请号：US13255171
申请日：2010-04-06
CPC分类号： G02B27/28 , G02B5/3025
摘要： An optical element transmits incident light having a particular polarization direction mainly by 0-order transmission and diffracts incident light having a perpendicular polarization direction. The optical element includes a periodic structure having a period equal to or greater than the wavelength of the incident light. The periodic structure includes first and second subwavelength concave-convex structures formed perpendicularly adjacent to each other in each period of the periodic structure. The first and the second subwavelength concave-convex structures have a period less than the wavelength of the incident light. A filling factor and a groove depth of the first and the second subwavelength concave-convex structures are determined such that they have the same effective refraction index with respect to the incident light having the particular polarization direction and a phase difference π with respect to the incident light having the particular polarization direction.
摘要翻译： 光学元件主要通过0阶透射来透射具有特定偏振方向的入射光，并衍射具有垂直偏振方向的入射光。 光学元件包括具有等于或大于入射光的波长的周期的周期性结构。 周期性结构包括在周期性结构的每个周期中彼此垂直相邻形成的第一和第二亚波长凹凸结构。 第一和第二亚波长凹凸结构的周期小于入射光的波长。 确定第一和第二亚波长凹凸结构的填充因子和凹槽深度，使得它们相对于具有特定偏振方向的入射光和相位差pgr具有相同的有效折射率; 相对于具有特定偏振方向的入射光。
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10.发明申请OPTICAL DEVICE, METHOD OF PRODUCING THE SAME, OPTICAL PICKUP, AND OPTICAL INFORMATION PROCESSING DEVICE 有权光学装置，其制造方法，光学拾取和光学信息处理装置公开(公告)号：US20100155977A1
公开(公告)日：2010-06-24
申请号：US12712308
申请日：2010-02-25
申请人： Hideaki Hirai , Kazuhiro Umeki
发明人： Hideaki Hirai , Kazuhiro Umeki
IPC分类号： B29D11/00
CPC分类号： G11B7/139 , G02B5/1809 , G02B5/1847 , G02B27/4238 , G11B7/123 , G11B7/1353 , G11B7/1381 , G11B2007/0006
摘要： An optical device having a sub-wavelength grating formed in a specified region is disclosed that is able to prevent wave front degradation accompanying a phase difference of a polarized light beam passing through the optical device. The optical device includes a circular-belt-like region where the sub-wavelength diffraction grating is formed, and a center portion where the sub-wavelength diffraction grating is not formed. A vertically polarized light beam used for operations on a blue-light optical recording medium A has a phase difference in the sub-wavelength diffraction grating to be an integral multiple of 2π and hence is transmitted through the sub-wavelength diffraction grating. A horizontally polarized light beam used for operations on a blue-light optical recording medium is diffracted by the sub-wavelength diffraction grating. The light path length L1 of the light beam passing through the circular-belt-like region is the same as that of the light beam passing through the center portion without the sub-wavelength grating.
摘要翻译： 公开了一种具有形成在特定区域中的子波长光栅的光学器件，其能够防止伴随通过光学器件的偏振光束的相位差的波前劣化。 光学器件包括形成亚波长衍射光栅的圆形带状区域和未形成亚波长衍射光栅的中心部分。 用于在蓝光光记录介质A上操作的垂直偏振光束在亚波长衍射光栅中的相位差为2＆pgr的整数倍; 因此通过亚波长衍射光栅传输。 用于在蓝光光记录介质上操作的水平偏振光束被亚波长衍射光栅衍射。 通过圆形带状区域的光束的光路长度L1与没有亚波长光栅的通过中心部分的光束的光路长度L1相同。
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