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11. 发明申请

US20120002280A1 OPTICAL ELEMENT, POLARIZATION FILTER, OPTICAL ISOLATOR, AND OPTICAL APPARATUS 有权
标题翻译：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
申请人： Hideaki Hirai , Toshimichi Nasukawa , Kazuhiro Umeki
发明人： Hideaki Hirai , Toshimichi Nasukawa , Kazuhiro Umeki
IPC分类号： G02F1/09 , G02B5/30
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。

12. 发明申请

US20110285898A1 IMAGING ELEMENT AND IMAGING APPARATUS USING THE SAME 有权
标题翻译：使用它的成像元件和成像装置
公开(公告)号：US20110285898A1
公开(公告)日：2011-11-24
申请号：US13146270
申请日：2010-01-26
申请人： Ryosuke Kasahara , Hideaki Hirai
发明人： Ryosuke Kasahara , Hideaki Hirai
IPC分类号： H04N5/225 , G03B7/00
CPC分类号： H04N9/045 , G02B5/1885 , H01L27/14621 , H01L27/14629 , H04N5/2254 , H04N5/238
摘要： An imaging element includes a light receiving surface having pixels, and a low-pass filter device configured to focus predetermined light on a predetermined pixel of the pixels of the light-receiving surface.
摘要翻译：成像元件包括具有像素的光接收表面和被配置为将预定光聚焦在光接收表面的像素的预定像素上的低通滤波器装置。

13. 发明申请

US20110002215A1 OPTICAL PICKUP DEVICE AND OPTICAL INFORMATION PROCESSING APPARATUS USING THE OPTICAL PICKUP DEVICE 审中-公开
标题翻译：光学拾取装置和光学信息处理装置使用光学拾取装置
公开(公告)号：US20110002215A1
公开(公告)日：2011-01-06
申请号：US12920544
申请日：2009-03-03
申请人： Hideaki Hirai
发明人： Hideaki Hirai
IPC分类号： G11B7/135
CPC分类号： G11B7/1275 , G02B5/1809 , G02B5/3025 , G11B7/1353 , G11B7/1356 , G11B2007/0006
摘要： An optical pickup device is disclosed. In the optical pickup device, S-polarized light is input to a polarization filter from a DVD light source or a CD light source. Since the polarization filter transmits through the S-polarized light and diffracts P-polarized light, the S-polarized light is transmitted through the polarization filter. The S-polarized light is converted into three beams by being diffracted by a diffraction element. The three beams reflected at a polarization beam splitter are converted into circularly polarized light by a ¼ wavelength plate via a collimate lens, and the circularly polarized light is condensed on an optical recording medium via an objective lens. Light reflected from the optical recording medium is converted into linear P-polarized light by the ¼ wavelength plate via the objective lens. Substantially almost all P-polarized light is transmitted through the polarization beam splitter. A slight amount of the returning light travels to the side of the light source.
摘要翻译：公开了一种光学拾取装置。在光拾取装置中，S偏振光从DVD光源或CD光源输入到偏振滤光器。由于偏振滤光器透过S偏振光并衍射P偏振光，所以S偏振光透射通过偏振滤光器。通过被衍射元件衍射，将S偏振光转换成三个光束。在偏振分束器处反射的三束光经由准直透镜被1/4波长板转换为圆偏振光，圆偏振光通过物镜在光记录介质上会聚。从光记录介质反射的光经由物镜被1/4波长板转换为线性P偏振光。基本上几乎所有的P偏振光透射通过偏振分束器。少量的返回光行进到光源的一侧。

14. 发明授权

US07813233B2 Information recording and reproduction apparatus including optical pickup unit 有权
标题翻译：信息记录和再现装置，包括光学拾取单元
公开(公告)号：US07813233B2
公开(公告)日：2010-10-12
申请号：US11702159
申请日：2007-02-05
申请人： Hideaki Hirai
发明人： Hideaki Hirai
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B7/1369 , G11B2007/0013
摘要： An optical pickup unit includes a light source emitting a light beam, an objective lens focusing the light beam onto an information recording medium, a light detection part receiving the light beam reflected from the information recording medium, and a light blocking part selectively blocking a part of the light beam with respect to a radial direction. The light blocking part is provided in an optical path of the light beam centered on an optical axis.
摘要翻译：光拾取单元包括发射光束的光源，将光束聚焦到信息记录介质上的物镜，接收从信息记录介质反射的光束的光检测部分和选择性地阻挡部分的光阻挡部分的光束相对于径向方向。光阻挡部设置在以光轴为中心的光束的光路中。

15. 发明申请

US20100155977A1 OPTICAL DEVICE, METHOD OF PRODUCING THE SAME, OPTICAL PICKUP, AND OPTICAL INFORMATION PROCESSING DEVICE 有权
标题翻译：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。

16. 发明申请

US20100118366A1 POLARIZATION SPLITTING DEVICE, METHOD OF MANUFACTURING POLARIZATION BEAM SPLITTER, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPARATUS 失效
标题翻译：极化分割装置，制造偏振光束分离器的方法，光学扫描装置和图像形成装置
公开(公告)号：US20100118366A1
公开(公告)日：2010-05-13
申请号：US12603731
申请日：2009-10-22
申请人： Toshiaki TOKITA , Hideaki HIRAI , Seizo SUZUKI
发明人： Toshiaki TOKITA , Hideaki HIRAI , Seizo SUZUKI
IPC分类号： G02B26/10 , G02B27/28 , G02B5/30
CPC分类号： G02B27/283 , G02B5/3041 , G02B26/123
摘要： A polarization splitting device includes a polarization beam splitter having a polarization splitting surface and allows P-polarized light to transmit therethrough and reflects S-polarized light. A subwavelength structure grating is formed on the polarization splitting surface with a grating pitch smaller than wavelength of incident light. The polarization splitting device also includes a polarizer that is arranged on an optical path of light reflected from the polarization beam splitter and has a transmission axis that is parallel to a polarization direction of the S-polarized light.
摘要翻译：偏振分束装置包括具有偏振分离表面的偏振分束器，并允许P偏振光透射并反射S偏振光。在具有比入射光的波长小的光栅间距的偏振分离表面上形成亚波长结构光栅。偏振光分离装置还包括偏振器，其被布置在从偏振分束器反射的光的光路上，并具有平行于S偏振光的偏振方向的透射轴。

17. 发明申请

US20090231981A1 OPTICAL PICKUP AND OPTICAL DATA PROCESSING DEVICE USING THE SAME 有权
标题翻译：光学拾取和光学数据处理装置
公开(公告)号：US20090231981A1
公开(公告)日：2009-09-17
申请号：US12403666
申请日：2009-03-13
申请人： Hideaki Hirai
发明人： Hideaki Hirai
IPC分类号： G11B7/135
CPC分类号： G11B7/131 , G11B7/0903 , G11B7/1367 , G11B7/1381 , G11B2007/0006 , G11B2007/0013
摘要： An optical pickup including a light source, a light focus device, a diffraction element, an optical split element, a ¼ wavelength board, a light reception device and a correction element wherein the correction element is divided into multiple areas in a surface vertical to an optical axis, each area of the multiple areas has a sub-wavelength convexo-concave structure having a pitch equal to or shorter than a wavelength of the outgoing light beam and the sub-wavelength convexo-concave structures of the multiple areas adjacent to each other have groove directions perpendicular to each other, and the filling factors of adjacent areas of the multiple areas are determined to substantially equalize effective refractive indices with regard to the polarization direction of the outgoing beam emitted from the light source and impart a phase difference of π with regard to a polarization direction perpendicular to the polarization direction of the outgoing beam.
摘要翻译：一种光拾取器，包括光源，光聚焦装置，衍射元件，光分离元件，1/4波长板，光接收装置和校正元件，其中校正元件被分成与垂直于光轴，多个区域的每个区域具有间隔等于或短于出射光束的波长和相邻的多个区域的亚波长凹凸结构的间距的亚波长凹凸结构具有彼此垂直的槽方向，并且确定多个区域的相邻区域的填充因子，以相对于从光源发射的出射光束的偏振方向基本上相等化有效折射率，并且将pi的相位差与关于垂直于出射光束的偏振方向的偏振方向。

18. 发明授权

US07385906B2 Objective lens, optical pickup, and optical information processing apparatus using the same 失效
标题翻译：物镜，光学拾取器和使用其的光学信息处理装置
公开(公告)号：US07385906B2
公开(公告)日：2008-06-10
申请号：US11798907
申请日：2007-05-17
申请人： Hideaki Hirai
发明人： Hideaki Hirai
IPC分类号： G11B7/135
CPC分类号： G11B7/1275 , G11B7/1353 , G11B7/1367 , G11B7/1374 , G11B7/139 , G11B7/13922 , G11B7/13925 , G11B2007/0006
摘要： An optical pickup includes a first optical source producing a first optical beam having a wavelength λ1, a second optical source producing a second optical beam having a wavelength λ2 (λ1
摘要翻译：光拾取器包括产生具有波长λ1的第一光束的第一光源，产生具有波长λ2（λ1λ2）的第二光束的第二光源，以及聚焦第一和第二光束到光记录介质，第一光束作为平行光束入射到物镜上，第二光束作为发散光入射到物镜，其中孔设置在物镜的前侧物镜从前侧的主点偏离距离t，由公式<？in-line-formula description =“In-line Formulas”end =“lead”？> t = L-NA1.f / tan（a sin（NA2obj）），<？in-line-formula description =“In-line Formulas”end =“tail”？>其中f表示物镜的焦距，NA 1表示当第一光源被接通时，图像表面的一侧，NA 2 obj表示当第二光源被接通时，在前侧的数值孔径，L表示当第二光源被接通时的物体距离。

19. 发明授权

US07345967B2 Optical pickup unit 有权
标题翻译：光学拾取单元
公开(公告)号：US07345967B2
公开(公告)日：2008-03-18
申请号：US11201197
申请日：2005-08-11
申请人： Hideaki Hirai
发明人： Hideaki Hirai
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B7/1369 , G11B2007/0013
摘要： An optical pickup unit includes a light source emitting a light beam, an objective lens focusing the light beam onto an information recording medium, a light detection part receiving the light beam reflected from the information recording medium, and a light blocking part selectively blocking a part of the light beam with respect to a radial direction. The light blocking part is provided in an optical path of the light beam centered on an optical axis.
摘要翻译：光拾取单元包括发射光束的光源，将光束聚焦到信息记录介质上的物镜，接收从信息记录介质反射的光束的光检测部分和选择性地阻挡部分的光阻挡部分的光束相对于径向方向。遮光部设置在以光轴为中心的光束的光路中。

20. 发明申请

US20070133372A1 Optical pickup unit and information recording and reproducing apparatus 有权
标题翻译：光学拾取单元和信息记录和再现装置
公开(公告)号：US20070133372A1
公开(公告)日：2007-06-14
申请号：US11702159
申请日：2007-02-05
申请人： Hideaki Hirai
发明人： Hideaki Hirai
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B7/1369 , G11B2007/0013
摘要： An optical pickup unit includes a light source emitting a light beam, an objective lens focusing the light beam onto an information recording medium, a light detection part receiving the light beam reflected from the information recording medium, and a light blocking part selectively blocking a part of the light beam with respect to a radial direction. The light blocking part is provided in an optical path of the light beam centered on an optical axis.
摘要翻译：光拾取单元包括发射光束的光源，将光束聚焦到信息记录介质上的物镜，接收从信息记录介质反射的光束的光检测部分和选择性地阻挡部分的光阻挡部分的光束相对于径向方向。遮光部设置在以光轴为中心的光束的光路中。

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