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    Liquid crystal diffraction lens element and optical head device
    1.
    发明授权
    Liquid crystal diffraction lens element and optical head device 失效
    液晶衍射透镜元件和光学头装置

    公开(公告)号：US07710536B2

    公开(公告)日：2010-05-04

    申请号：US11737177

    申请日：2007-04-19

    申请人： Mitsuo Osawa ,  Yoshiharu Ooi

    发明人： Mitsuo Osawa ,  Yoshiharu Ooi

    IPC分类号： G02F1/13 ,  G11B7/135

    CPC分类号： G02F1/133526 ,  G02B3/08 ,  G02B3/14 ,  G02B5/1866 ,  G02B5/1876 ,  G02F1/29 ,  G02F2001/294 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/13925 ,  G11B2007/0006

    摘要： A liquid crystal diffraction lens element and an optical head device, which can switch focal lengths of both of outgoing light and returning light by a single element, are provided.The liquid crystal lens element comprises transparent substrates 1a, 1b, a liquid crystal 4 sandwiched between the transparent substrates 1a, 1b, transparent electrodes 2a, 2b, birefringent Fresnel lens members 3a, 3b each having a Fresnel lens shape and made of a birefringent material, and a seal 5, wherein the extraordinary refractive index direction A of the birefringent Fresnel lens member 3a and the extraordinary refractive index direction B of the birefringent Fresnel lens member 3b are perpendicular to each other, and the alignment direction of the liquid crystal 4 at the interface between the liquid crystal 4 and the transparent substrate 1a is perpendicular to the alignment direction of the liquid crystal 4 at the interface between the liquid crystal 4 and the transparent substrate 1b.

    摘要翻译： 提供了可以通过单个元件切换出射光和返回光的焦距的液晶衍射透镜元件和光学头装置。 液晶透镜元件包括透明基板1a，1b，夹在透明基板1a，1b，透明电极2a，2b之间的液晶4，每个具有菲涅耳透镜形状并由双折射材料制成的双折射菲涅尔透镜部件3a，3b 以及密封件5，其中双折射菲涅尔透镜部件3a的非常折射率方向A和双折射菲涅耳透镜部件3b的非常折射率方向B彼此垂直，并且液晶4的取向方向在 液晶4和透明基板1a之间的界面在液晶4和透明基板1b之间的界面处垂直于液晶4的取向方向。

    LIQUID CRYSTAL DIFFRACTION LENS ELEMENT AND OPTICAL HEAD DEVICE
    2.
    发明申请
    LIQUID CRYSTAL DIFFRACTION LENS ELEMENT AND OPTICAL HEAD DEVICE 失效
    液晶衍射透镜元件和光学头设备

    公开(公告)号：US20070182915A1

    公开(公告)日：2007-08-09

    申请号：US11737177

    申请日：2007-04-19

    申请人： Mitsuo Osawa ,  Yoshiharu Ooi

    发明人： Mitsuo Osawa ,  Yoshiharu Ooi

    IPC分类号： G02F1/13

    CPC分类号： G02F1/133526 ,  G02B3/08 ,  G02B3/14 ,  G02B5/1866 ,  G02B5/1876 ,  G02F1/29 ,  G02F2001/294 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/13925 ,  G11B2007/0006

    摘要： A liquid crystal diffraction lens element and an optical head device, which can switch focal lengths of both of outgoing light and returning light by a single element, are provided. The liquid crystal lens element comprises transparent substrates 1a, 1b, a liquid crystal 4 sandwiched between the transparent substrates 1a, 1b, transparent electrodes 2a, 2b, birefringent Fresnel lens members 3a, 3b each having a Fresnel lens shape and made of a birefringent material, and a seal 5, wherein the extraordinary refractive index direction A of the birefringent Fresnel lens member 3a and the extraordinary refractive index direction B of the birefringent Fresnel lens member 3b are perpendicular to each other, and the alignment direction of the liquid crystal 4 at the interface between the liquid crystal 4 and the transparent substrate 1a is perpendicular to the alignment direction of the liquid crystal 4 at the interface between the liquid crystal 4 and the transparent substrate 1b.

    摘要翻译： 提供了可以通过单个元件切换出射光和返回光的焦距的液晶衍射透镜元件和光学头装置。 液晶透镜元件包括透明基板1a，1bb，夹在透明基板1a，1b之间的液晶4，透明电极2a，2b，分别具有菲涅耳的双折射菲涅尔透镜部件3a， 透镜形状并由双折射材料制成;以及密封件5，其中双折射菲涅耳透镜部件3a的非常折射率方向A和双折射菲涅耳透镜部件3b的非常折射率方向B彼此垂直， 液晶4与透明基板1a的界面处的液晶4的取向方向与液晶4与透明基板1b的界面处的液晶4的取向方向垂直。

    Diffraction element
    3.
    发明授权
    Diffraction element 失效
    衍射元件

    公开(公告)号：US07430076B2

    公开(公告)日：2008-09-30

    申请号：US10798556

    申请日：2004-03-12

    申请人： Hiromasa Sato ,  Yoshiharu Ooi

    发明人： Hiromasa Sato ,  Yoshiharu Ooi

    IPC分类号： G02B5/18 ,  G11B7/135

    CPC分类号： G11B7/1275 ,  G02B5/1819 ,  G02B5/1861 ,  G02B5/1871 ,  G02B27/4244 ,  G11B7/1353 ,  G11B2007/0006

    摘要： A diffraction element having concave/convex-like diffraction gratings in its two surfaces from which at least two separated light beams can be taken in the same direction without changing largely the propagating direction of diffracted light even if the temperature of the operating environment changes. A diffraction grating having a concave/convex shape in cross-section is formed in the incoming-side surface of the transparent substrate and two diffraction gratings of concave/convex shape in cross-section are formed in the outgoing-side surface wherein the grating pitch of the first one is made equal to the grating pitch of one of the second ones.In addition, a reflection type diffraction element exhibiting a good wavelength dependence of diffraction efficiency without being dependent largely on the direction of polarization of an incoming light is provided. A pseudo sawtooth-like diffraction grating is formed in either surface of the transparent substrate, a reflective film is formed on a diffraction grating portion, and an antireflective film is formed on the opposite surface.

    摘要翻译： 在其两个表面中具有凹凸像衍射光栅的衍射元件，即使在操作环境的温度变化的情况下，至少两个分离的光束可以从该衍射元件沿相同的方向取向，而不会大大改变衍射光的传播方向。 在透明基板的入射侧表面上形成横截面为凹凸形状的衍射光栅，在出射侧表面形成两个横截面的凹凸形状的衍射光栅，其中光栅间距 第一个的光栅间距等于第二个光栅间距。 此外，提供了在很大程度上不依赖于入射光的偏振方向的衍射效率表现出良好的波长依赖性的反射型衍射元件。 在透明基板的任一表面上形成伪锯齿状的衍射光栅，在衍射光栅部分上形成反射膜，在相反的面上形成防反射膜。

    Liquid crystal lens element and optical head device
    4.
    发明授权
    Liquid crystal lens element and optical head device 有权
    液晶透镜元件和光头装置

    公开(公告)号：US07388822B2

    公开(公告)日：2008-06-17

    申请号：US11498076

    申请日：2006-08-03

    申请人： Yoshiharu Ooi ,  Hiromasa Sato ,  Ryuichiro Shimizu ,  Takuji Nomura ,  Yuzuru Tanabe ,  Mitsuo Oosawa

    发明人： Yoshiharu Ooi ,  Hiromasa Sato ,  Ryuichiro Shimizu ,  Takuji Nomura ,  Yuzuru Tanabe ,  Mitsuo Oosawa

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1275 ,  G02F1/133526 ,  G02F1/29 ,  G02F2001/294 ,  G02F2203/18 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/0013

    摘要： A liquid crystal lens element having a lens function is provided, which is small sized without having moving part, and which can stably carry out correction of spherical aberration containing a power component corresponding to focal point change of incident light.A liquid crystal lens element which changes a focal length of light transmitted through a liquid crystal 16 according to the magnitude of the voltage applied to the liquid crystal 16 sandwiched between a pair of transparent substrates 11 and 12, which comprises transparent electrodes 13 and 14 provided on the respective transparent substrates 11 and 12 for applying a voltage for the liquid crystal 16, and a concave-convex portion 17 having a saw-tooth-shaped cross-sectional shape having a rotational symmetry about an optical axis and formed on one surface of the transparent electrode 13 with a transparent material, wherein at least concave portions of the concave-convex portion 17 are filled with the liquid crystal 16 so as to change the substantial refractive index of the liquid crystal 16 according to the magnitude of applied voltage.

    摘要翻译： 提供了具有透镜功能的液晶透镜元件，其尺寸小而不具有移动部分，并且可以稳定地执行包含对应于入射光的焦点变化的功率分量的球面像差的校正。 一种液晶透镜元件，其根据施加到夹在包括透明电极13和14的一对透明基板11和12之间的液晶16的电压的大小而改变透射通过液晶16的光的焦距，该透明基板11和12包括透明电极13和14 在用于施加液晶16的电压的各个透明基板11和12上，以及具有围绕光轴旋转对称的锯齿状截面形状的凹凸部17，并形成在 具有透明材料的透明电极13，其中凹凸部17的至少凹部被液晶16填充，以便根据施加电压的大小改变液晶16的实质折射率。

    Polarizing diffraction element and optical head device
    5.
    发明申请
    Polarizing diffraction element and optical head device 失效
    极化衍射元件和光学头装置

    公开(公告)号：US20060239171A1

    公开(公告)日：2006-10-26

    申请号：US11474435

    申请日：2006-06-26

    申请人： Yoshiharu Ooi ,  Hiromasa Sato ,  Tomoki Gunjima

    发明人： Yoshiharu Ooi ,  Hiromasa Sato ,  Tomoki Gunjima

    IPC分类号： G11B7/135

    CPC分类号： G11B7/1353 ,  G02B5/18 ,  G02B5/30 ,  G03H1/0248 ,  G03H2222/31 ,  G11B7/1275

    摘要： A polarizing diffraction element having a wavelength selectivity which functions as a polarizing diffraction element at a wavelength λ1, and which does not function as a diffraction grating not depending on incident polarization state and shows high transmittance at a wavelength λ2, and an optical head device employing the element, are provided. The polarizing diffraction element selectively diffracts or transmits incident light having two different wavelengths each containing a first circularly polarized light and a second circularly polarized light having a rotation opposite from the rotation of the first circularly polarized light, depending on wavelength and polarization state of the incident light. Then, a reflective wavelength region for at least the first circularly incident light, does not contain said two incident wavelengths.

    摘要翻译： 具有波长选择性的偏振衍射元件，该波长选择性用作波长λ1的偏振衍射元件，并且不用作不依赖于入射偏振状态的衍射光栅，并且在波长处表现出高的透射率 λ2＆gt;和采用该元件的光学头装置。 偏振衍射元件选择性地衍射或透射具有两个不同波长的入射光，每个入射光包含第一圆偏振光和具有与第一圆偏振光的旋转相反的旋转的第二圆偏振光，这取决于事件的波长和偏振状态 光。 然后，至少第一圆形入射光的反射波长区域不包含所述两个入射波长。

    Multi-layer diffraction type polarizer and liquid crystal element
    6.
    发明授权
    Multi-layer diffraction type polarizer and liquid crystal element 失效
    多层衍射型偏振片和液晶元件

    公开(公告)号：US07079202B2

    公开(公告)日：2006-07-18

    申请号：US10784714

    申请日：2004-02-24

    申请人： Yoshiharu Ooi ,  Masao Ozeki

    发明人： Yoshiharu Ooi ,  Masao Ozeki

    IPC分类号： G02F1/1347

    CPC分类号： G02B6/2706 ,  G02B5/1814 ,  G02B5/3041 ,  G02B5/3083 ,  G02B6/2746 ,  G02B6/2766 ,  G02B27/286 ,  G02B27/4272 ,  G02F1/133528 ,  G02F2001/133538 ,  G02F2001/133638 ,  G02F2203/48

    摘要： A liquid crystal element including a liquid crystal cell that has transparent substrates having electrodes and a liquid crystal layer sandwiched between the substrates, the liquid crystal cell having a retardation value for a linearly polarized light having a wavelength of λ incident and transmitting through the liquid crystal cell, the retardation value changing from R1 to R2 (R1>R2>0) when a first voltage V1 applied between the electrodes is changed to a second voltage V2 (V1≠V2). The liquid crystal element also includes a phase plate having a retardation value R for a linearly polarized light having the wavelength of λ, the retardation value R satisfying a relation R+Rv=m×λ (m: integer) with a retardation value Rv generated by a third voltage satisfying R1≧Rv≧R2.

    摘要翻译： 一种液晶元件，包括具有透明基板的液晶单元，所述液晶单元具有电极和夹在所述基板之间的液晶层，所述液晶单元具有入射并通过液晶的λ波长的线偏振光的延迟值 单元，延迟值从R 1到R 2（R 1 1 / R 2 2 0）变化，当 施加在电极之间的第一电压V SUB 1被改变为第二电压V 2（V 1/2> V 2） SUB>）。 液晶元件还包括具有波长为λ的直线偏振光的延迟值R的相位差，延迟值R满足关系R + R V = m×λ（m：整数） 具有通过满足R 1的第三电压产生的延迟值R V 2＆lt; V 2＆lt; 。

    Light source apparatus using a cone-like material and an applied apparatus thereof
    9.
    发明授权
    Light source apparatus using a cone-like material and an applied apparatus thereof 失效
    使用锥形材料的光源装置及其施加装置

    公开(公告)号：US5659409A

    公开(公告)日：1997-08-19

    申请号：US133222

    申请日：1993-10-07

    申请人： Yoshiharu Ooi ,  Tsuneo Wakabayashi ,  Shigeyuki Serizawa ,  Yoshiyuki Sonda

    发明人： Yoshiharu Ooi ,  Tsuneo Wakabayashi ,  Shigeyuki Serizawa ,  Yoshiyuki Sonda

    IPC分类号： H04N9/31 ,  G02F1/1335

    CPC分类号： H04N9/3105 ,  H04N9/315

    摘要： A projection type display apparatus comprising a light source apparatus which is provided with an elliptic mirror 12, a light source 11 disposed at the first focal point, a cone-like material disposed at the second focal point, a condenser lens 13, display elements 15R-15B, a color separating and synthesizing optical system, second condenser lenses 16R-16B and a projection lens 19. The cone-like material is one selected from the group of a convex cone lens, a concave cone lens 2, a convex cone-like reflector and a concave cone-like reflector 20. In the projection type display element, light emitted from the light source is introduced into the cone-like material and is emitted as divergent light through the conical surface of the cone-like material. The divergent light is introduced into the condenser lens 13 so that the light is rendered to be parallel light fluxes, which are color-separated and introduced into the display elements 15R-15B disposed for each color in order to form light fluxes of display colors. The light fluxes are again subjected to color synthesization, and the synthesized light is projected as a full color picture image on a screen through the projection lens 19. The projection type display apparatus provides a display having uniformity, a good contrast ratio and brightness.

    摘要翻译： 一种投影型显示装置，包括设置有椭圆镜12，设置在第一焦点处的光源11，设置在第二焦点处的锥形材料的光源装置，聚光透镜13，显示元件15R -15B，分色合成光学系统，第二聚光透镜16R-16B和投影透镜19.锥形材料选自凸锥形透镜，凹锥形透镜2，凸锥形透镜， 在投影型显示元件中，从光源发射的光被引入到锥形材料中，并作为发散光通过锥形材料的锥形表面发射。 发散光被引入到聚光透镜13中，使得光成为平行光束，其被分色并被引入到为每种颜色设置的显示元件15R-15B中，以便形成显示颜色的光通量。 光束再次进行颜色合成，并且合成的光通过投影透镜19投影在屏幕上作为全色图像。投影型显示装置提供具有均匀性，良好的对比度和亮度的显示。

    Optical joint comprising antireflection films
    10.
    发明授权
    Optical joint comprising antireflection films 失效
    包括防反射膜的光学接头

    公开(公告)号：US4794033A

    公开(公告)日：1988-12-27

    申请号：US909029

    申请日：1986-09-17

    申请人： Yoshiharu Ooi

    发明人： Yoshiharu Ooi

    IPC分类号： G02B1/10 ,  G02B1/11 ,  G02F1/03 ,  B32B7/02

    CPC分类号： G02B1/115 ,  Y10T428/24942

    摘要： An optical joint for joining a first light transmissive material to a second light transmissive material. The joint comprises a transparent adhesive layer between the first and second materials, and an antireflection film between each of the first and second materials and the adhesive layer. The joint prevents Fresnel reflection which would otherwise occur between the light transmissive materials.

    摘要翻译： 一种用于将第一透光材料连接到第二透光材料的光学接头。 接头包括在第一和第二材料之间的透明粘合剂层，以及在第一和第二材料和粘合剂层中的每一个之间的抗反射膜。 接头防止在透光材料之间会发生的菲涅耳反射。