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    Diffractive optical element
    21.
    发明授权
    Diffractive optical element 失效
    衍射光学元件

    公开(公告)号：US06822796B2

    公开(公告)日：2004-11-23

    申请号：US09988647

    申请日：2001-11-20

    Applicant: Kyu Takada ,  Takuji Hatano ,  Koji Takahara ,  Koujirou Sekine

    Inventor： Kyu Takada ,  Takuji Hatano ,  Koji Takahara ,  Koujirou Sekine

    IPC: G02B518

    CPC classification number: G02B27/4272 ,  G02B5/1823 ,  G02B5/1861

    Abstract: A diffractive optical element has a diffraction grating formed by periodic depressions and projections on the surface of a substrate and a dielectric multilayer film on the diffraction grating. The materials of the respective layers of the film are chosen such that the depth of the depressions is an integral multiple of the sum of the thickness of the layers in one period of the film. As a result, individual layers of the film are continuous across multiple depressions and projections, to provide improved first-order reflectance.

    Abstract translation: 衍射光学元件具有由衍射光栅上的基板表面上的周期性凹凸和电介质多层膜形成的衍射光栅。 选择膜的各层的材料，使得凹陷的深度是膜的一个周期中层的厚度之和的整数倍。 结果，膜的单个层在多个凹陷和突起之间是连续的，以提供改进的一级反射率。

    Optical device for making light converge
    22.
    发明授权
    Optical device for making light converge 失效
    用于使光聚光的光学装置

    公开(公告)号：US06791755B2

    公开(公告)日：2004-09-14

    申请号：US10212238

    申请日：2002-08-06

    Applicant: Hiroshi Hatano ,  Kyu Takada

    Inventor： Hiroshi Hatano ,  Kyu Takada

    IPC: G02B2744

    CPC classification number: G02B27/4272 ,  G02B5/1819

    Abstract: An optical device for making light converge produces a convergent light beam with a satisfactorily great numerical aperture and acceptably small aberrations. The optical device has a plurality of diffraction gratings that each make light converge. The light shone into the optical device is passed through one after another of those diffraction gratings in such a way that the light is made to converge to a higher degree every time it passes through one of the diffraction gratings. The diffraction gratings may be all transmissive, all reflective, or a combination of both. The diffraction gratings are formed on a surface of or at an interface inside the optical device, and two diffraction gratings may be formed on a single surface. The light is made to eventually converge on the exit surface of the optical device so that the optical device functions as a solid immersion device.

    Abstract translation: 用于进行聚光的光学装置产生具有令人满意的大数值孔径和可接受的小像差的会聚光束。 光学装置具有各自使光会聚的多个衍射光栅。 照射到光学装置中的光通过这些衍射光栅中的另一个，使得每当它们通过一个衍射光栅时，光被聚焦到更高的程度。 衍射光栅可以是全透射的，全反射的或两者的组合。 衍射光栅形成在光学器件内部或界面处的表面上，并且两个衍射光栅可以形成在单个表面上。 光被最终会聚在光学装置的出射表面上，使得光学装置用作固体浸没装置。

    Objective lens system for optical pickups
    23.
    发明授权
    Objective lens system for optical pickups 有权
    用于光学拾音器的物镜系统

    公开(公告)号：US06624951B2

    公开(公告)日：2003-09-23

    申请号：US10163333

    申请日：2002-06-05

    Applicant: Junji Hashimura ,  Kyu Takada ,  Hideki Nagata

    Inventor： Junji Hashimura ,  Kyu Takada ,  Hideki Nagata

    IPC: G02B1318

    CPC classification number: G11B7/1374 ,  G11B2007/13727

    Abstract: An objective lens system for optical pickups performing at least one of reading and writing of information by condensing a luminous flux from a light source on an information recording medium, has the following two lens elements from a light source side: a first lens element having a first surface convex to the light source side and a second surface convex to the light source side; and a second lens element having a third surface convex to the light source side and a plane fourth surface, wherein the first surface is an aspherical surface.

    Abstract translation: 用于通过将来自光源的光通量聚集在信息记录介质上的读取和写入信息中的至少一个的光学拾取器的物镜系统具有来自光源侧的以下两个透镜元件：第一透镜元件，具有 第一表面凸起到光源侧，第二表面凸起到光源侧; 以及第二透镜元件，其具有对光源侧凸出的第三表面和平面第四表面，其中所述第一表面是非球面。

    Optical module and manufacturing method thereof
    24.
    发明授权
    Optical module and manufacturing method thereof 失效
    光模块及其制造方法

    公开(公告)号：US06466708B2

    公开(公告)日：2002-10-15

    申请号：US09745463

    申请日：2000-12-26

    Applicant: Mitsuru Yokoyama ,  Takuji Hatano ,  Kyu Takada ,  Miyuki Teramoto ,  Koujirou Sekine

    Inventor： Mitsuru Yokoyama ,  Takuji Hatano ,  Kyu Takada ,  Miyuki Teramoto ,  Koujirou Sekine

    IPC: G02B612

    CPC classification number: G02B6/12007 ,  B82Y20/00 ,  G02B6/1225 ,  G02B6/13 ,  G02B2006/12176

    Abstract: An optical module has a substrate, a waveguide, formed on the substrate, for guiding light, and a photonic crystal portion that has media having different refractive indices arranged in a periodic pattern and that is disposed in a channel of the waveguide on the substrate. Here, the photonic crystal and the substrate are integrally formed. The formation comprises the steps of forming an aluminum film on the top of a conductive substrate, forming a protective film on the aluminum film, removing the protective film from a predetermined area to form a window over the predetermined area, anodizing the aluminum film exposed through the window to form photonic crystals, removing the protective film, cladding the bottom of the substrate and forming a core layer over the cladded bottom.

    Abstract translation: 光学模块具有形成在基板上的用于引导光的基板，波导管，以及具有以周期性图案排列的不同折射率的介质的光子晶体部分，其设置在基板上的波导的通道中。 这里，光子晶体和基板一体形成。 该形成包括以下步骤：在导电基板的顶部形成铝膜，在铝膜上形成保护膜，从预定区域去除保护膜，以在预定区域上形成窗口，阳极氧化暴露于该铝膜的铝膜 形成光子晶体的窗口，去除保护膜，包覆基底的底部并在包覆的底部上形成芯层。

    Image forming apparatus
    25.
    发明授权
    Image forming apparatus 失效
    图像形成装置

    公开(公告)号：US06326992B1

    公开(公告)日：2001-12-04

    申请号：US09166700

    申请日：1998-10-05

    Applicant: Nozomu Inoue ,  Kyu Takada ,  Hajime Kurihara ,  Yoshiro Koga

    Inventor： Nozomu Inoue ,  Kyu Takada ,  Hajime Kurihara ,  Yoshiro Koga

    IPC: B41J247

    CPC classification number: H04N1/1917 ,  B41J2/473 ,  G02B26/123 ,  G06K15/1261 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/19 ,  H04N1/1911 ,  H04N1/19505 ,  H04N1/19515 ,  H04N1/19531 ,  H04N1/19547 ,  H04N1/19563 ,  H04N1/19573 ,  H04N1/19589

    Abstract: An image forming apparatus includes a laser beam scanning unit adapted for scanning laser beams on a surface of a charged image bearing member (5). The laser beam scanning unit (53) comprises a semiconductor laser array (21) having a plurality of light emitting portions (21a) and a rotating polygon mirror adapted for deflecting laser beams emitted from the light emitting portions to the image bearing member (5). The light emitting portions (21a) are disposed two-dimensionally on a surface of the semiconductor laser array. The lighting and the amount of light of the light emitting portions (21a) are discretely controlled by a control unit. The scanning unit further includes a collimator lens having a focal length fc, where a distance between a most spaced two of the plurality of light emitting portions is .delta. max, and fc/.delta. max is 25 or more.

    Abstract translation: 图像形成装置包括：激光束扫描单元，用于扫描带电图像承载部件（5）的表面上的激光束。 激光束扫描单元（53）包括具有多个发光部分（21a）的半导体激光器阵列（21）和适于将从发光部分发射的激光束偏转到图像承载部件（5）的旋转多面镜， 。 发光部分（21a）被二维地设置在半导体激光器阵列的表面上。 发光部分（21a）的照明和光量由控制单元离散地控制。 扫描单元还包括具有焦距fc的准直透镜，其中多个发光部分中最隔开的两个之间的距离为。 max和fc / .delta。 最大为25以上。

    Optical scanner
    26.
    发明授权
    Optical scanner 失效
    光学扫描仪

    公开(公告)号：US5883732A

    公开(公告)日：1999-03-16

    申请号：US644493

    申请日：1996-05-10

    Applicant: Kyu Takada ,  Nozomu Inoue ,  Takashi Hama ,  Yujiro Nomura

    Inventor： Kyu Takada ,  Nozomu Inoue ,  Takashi Hama ,  Yujiro Nomura

    IPC: B41J2/44 ,  G02B13/00 ,  G02B26/10 ,  G02B26/12 ,  G02B26/08

    CPC classification number: G02B26/125 ,  G02B13/0005

    Abstract: To provide an optical scanner for typical use with laser beam printers that is capable of effective correction of aberrational characteristics and which also produces a constant beam spot size, a semiconductor laser array 1 having a plurality of light-emitting portions issues a plurality of beams, which are reflected and deflected by reflecting surfaces of rotating polygonal mirror 5 and pass through imaging lens 6 to form a plurality of beam spots on the surface to be scanned 7. Both the entrance and exit surfaces of imaging lens 6 are such that the curvatures in the sub- and main scanning directions are independent of each other, with the curvature in the sub-scanning direction varying continuously in the main scanning direction over the effective area of imaging lens 6.

    Abstract translation: 为了提供能够有效校正像差特性并且还产生恒定光斑尺寸的激光束打印机的典型应用的光学扫描器，具有多个发光部分的半导体激光器阵列1发出多个光束， 它们通过旋转多面镜5的反射表面反射和偏转，并通过成像透镜6，以在待扫描的表面上形成多个光束点。成像透镜6的入射面和出射面都是这样的： 子扫描方向和主扫描方向彼此独立，副扫描方向的曲率在成像透镜6的有效区域上的主扫描方向上连续变化。

    Optical scanner
    27.
    发明授权
    Optical scanner 失效
    光学扫描仪

    公开(公告)号：US5877883A

    公开(公告)日：1999-03-02

    申请号：US22557

    申请日：1998-02-12

    Applicant: Nozomu Inoue ,  Takashi Hama ,  Yujiro Nomura ,  Kyu Takada

    Inventor： Nozomu Inoue ,  Takashi Hama ,  Yujiro Nomura ,  Kyu Takada

    IPC: G02B26/12 ,  G02B26/08

    CPC classification number: G02B26/12

    Abstract: An optical scanner that has a simple construction and which yet exhibits satisfactory imaging performance under varying temperature conditions. Of the two orthogonal scanning cross sections of scanning optics (i.e., the main and sub-scanning cross sections), the one that involves the greater movement of the image plane due to the temperature-dependent changes in optical characteristics (e.g. the variation in the operating wavelength of a light source, the index variation of a lens material and the thermal expansion of a lens itself) is adapted to be the same as the other cross section that involves the greater movement of the image plane due to the change in the distance from the light source to a collimator lens. If necessary, additional correction is effected in such a way that the scanning cross section that involves the greater overall movement of the image plane after correction for temperature changes is adapted to be different from the cross section that involves the greater amount of optical field curvature.

    Abstract translation: 一种光学扫描仪，具有简单的结构，并且在变化的温度条件下表现出令人满意的成像性能。 在扫描光学器件的两个正交扫描横截面（即主扫描和副扫描截面）中，由于光学特性的温度依赖性变化（例如， 光源的工作波长，透镜材料的折射率变化和透镜本身的热膨胀）适合于与由于距离变化引起的图像平面更大移动的另一横截面相同 从光源到准直透镜。 如果需要，进行附加的校正，使得在校正温度变化之后涉及图像平面的更大整体运动的扫描横截面适于与涉及更大量的光场曲率的横截面不同。

    Optical scanner
    29.
    发明授权
    Optical scanner 失效
    光学扫描仪

    公开(公告)号：US5600476A

    公开(公告)日：1997-02-04

    申请号：US451396

    申请日：1995-05-26

    Applicant: Kyu Takada ,  Nozomu Inoue ,  Takashi Hama ,  Yujiro Nomura

    Inventor： Kyu Takada ,  Nozomu Inoue ,  Takashi Hama ,  Yujiro Nomura

    IPC: B41J2/44 ,  G02B5/09 ,  G02B26/10 ,  G02B26/12 ,  G03G15/04 ,  G02B26/08

    CPC classification number: G02B5/09 ,  G02B26/125

    Abstract: An optical scanner for use in laser beam printers and the like which is particularly satisfactory in imaging characteristics. A light beam from a semiconductor laser passes through a collimator lens, an aperture diaphragm and a cylindrical lens. The beam is then deflected by a rotating lens mirror and subjected to the focusing action of an imaging lens so that it is focused to form a beam spot, which scans over a scan surface as the beam is deflected. The imaging lens has aspheric surfaces in the main-scanning cross section and is designed so that the rate of change in its curvature and other relevant parameters satisfy a predetermined equation so as to lie within a predetermined range.

    Abstract translation: 用于激光束打印机等的光学扫描仪，其特别令人满意的成像特性。 来自半导体激光器的光束通过准直透镜，孔径光阑和柱面透镜。 然后光束被旋转透镜反射镜偏转并经受成像透镜的聚焦作用，使得其被聚焦以形成光束点，当光束被偏转时扫描光束点在扫描表面上扫描。 成像透镜在主扫描横截面中具有非球面，并且被设计成其曲率变化率和其它相关参数满足预定方程以便处于预定范围内。

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