公开(公告)号：US20090066779A1

公开(公告)日：2009-03-12

申请号：US12208208

申请日：2008-09-10

申请人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

发明人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

IPC分类号： B41J2/45

CPC分类号： B41J2/451 ,  G03G15/04045 ,  G03G15/0409 ,  G03G15/326 ,  G03G2215/0409

摘要： A line head includes a lens array having a plurality of positive lens systems in a first direction. Each positive lens system has a pair of lenses with positive refractive power. A light emitter array disposed on an object side of the lens array has a plurality of light emitting elements disposed corresponding to the positive lens systems. An aperture plate forms an aperture stop on the object side of the pair of lenses. A focal distance f1 of one of the pair of lenses disposed on the object side satisfies the conditional formula f1≦d0/(1+W0/D1).

摘要翻译： 线头包括在第一方向上具有多个正透镜系统的透镜阵列。 每个正透镜系统都具有一对具有正屈光力的透镜。 设置在透镜阵列的物体侧上的发光体阵列具有与正透镜系统对应设置的多个发光元件。 光圈板在一对透镜的物体侧形成孔径光阑。 设置在物体侧的一对透镜中的一个的焦距f1满足条件式f1 <= d0 /（1 + W0 / D1）。

公开(公告)号：US20100183338A1

公开(公告)日：2010-07-22

申请号：US12628838

申请日：2009-12-01

申请人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

发明人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

IPC分类号： G03G15/04

CPC分类号： B41J2/451 ,  G03G15/04072 ,  G03G2215/0412

摘要： An image forming apparatus includes a latent image carrier on which a latent image is formed; and a line head. The line head includes light-emitting elements arranged in a first direction; an aperture diaphragm; and an optical system that images light emitted from the light-emitting elements on a latent image carrier. The aperture diaphragm and the optical system are arranged in a second direction that is orthogonal to or substantially orthogonal to the first direction; and among the lenses included in the optical system, a lens located at the position closest to the aperture diaphragm is a multifocal lens.

摘要翻译： 一种图像形成装置包括：潜像载体，其上形成潜像; 和线头。 线头包括沿第一方向布置的发光元件; 孔径光阑; 以及将从发光元件发射的光成像在潜像载体上的光学系统。 孔径光阑和光学系统沿与第一方向正交或基本正交的第二方向排列; 并且在包括在光学系统中的透镜中，位于最靠近孔径光阑的位置处的透镜是多焦点透镜。

公开(公告)号：US20090195634A1

公开(公告)日：2009-08-06

申请号：US12362382

申请日：2009-01-29

申请人： Ryuta KOIZUMI ,  Yujiro NOMURA ,  Takeshi SOWA

发明人： Ryuta KOIZUMI ,  Yujiro NOMURA ,  Takeshi SOWA

IPC分类号： B41J2/447

CPC分类号： B41J2/451

摘要： A line head, includes: a head substrate that includes a first light emitting element and a second light emitting element; and a lens array that includes a first positive lens that images a light emitted from the first light emitting element on a specified plane and has a lens surface of a free-form surface, and a second positive lens that images a light emitted from the second light emitting element on the specified plane and has a lens surface of a free-form surface, each of the lens surfaces of the first and the second positive lenses having focal points with different focal lengths.

摘要翻译： 行头包括：包括第一发光元件和第二发光元件的头基板; 以及透镜阵列，其包括第一正透镜，其将从所述第一发光元件发射的光在指定平面上成像并具有自由曲面的透镜表面;以及第二正透镜，其对从所述第二发光元件发出的光进行成像 发光元件在指定平面上并且具有自由曲面的透镜表面，第一和第二正透镜的每个透镜表面具有不同焦距的焦点。

公开(公告)号：US20090185277A1

公开(公告)日：2009-07-23

申请号：US12352906

申请日：2009-01-13

申请人： Ryuta KOIZUMI ,  Yujiro NOMURA ,  Takeshi SOWA

发明人： Ryuta KOIZUMI ,  Yujiro NOMURA ,  Takeshi SOWA

IPC分类号： G02B27/16

CPC分类号： G02B3/0006 ,  B41J2/451

摘要： An exposure head, includes: a lens array that includes a light transmissive substrate whose length in a first direction is greater than a length thereof in a second direction orthogonal to the first direction, a first lens that is arranged on the light transmissive substrate, and a second lens that is arranged on the light transmissive substrate at the first direction of the first lens, the first lens and the second lens being connected in the first direction; and a head substrate that is provided with a first light emitting element that emits a light toward the first lens and a second light emitting element that emits a light toward the second lens.

摘要翻译： 曝光头包括：透镜阵列，其包括在与第一方向正交的第二方向上在第一方向上的长度大于其长度的透光基板，布置在透光基板上的第一透镜，以及 在所述第一透镜的第一方向上配置在所述透光性基板上的第二透镜，所述第一透镜和所述第二透镜沿所述第一方向连接; 以及头基板，其设置有朝向第一透镜发光的第一发光元件和朝向第二透镜发光的第二发光元件。

公开(公告)号：US20090035020A1

公开(公告)日：2009-02-05

申请号：US12169505

申请日：2008-07-08

申请人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

发明人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

IPC分类号： G03G15/04

CPC分类号： B41J2/451 ,  H04N1/1933 ,  H04N1/1934 ,  H04N1/1935 ,  H04N2201/0082

摘要： The invention provides an optical write linehead comprising a plurality of light emitter devices in rows located in association with each of a plurality positive lenses lined up in array form and designed such that even when the surface of the linehead with light emitter devices lined up on it and the write surface thereof fluctuate in the optical axis direction, there is no variation from misalignments of light-emission dots. The linehead comprises a light emitter array 1 including a plurality of light emitter blocks 4 located at least in the main scan direction at intervals. Each light emitter block 4 includes at least one row of a plurality of light emitter devices lined up in array form in the main scan direction. One each positive lens system 5 is located on the exit side of the light emitter array 1 and in line with each light emitting block 4. A write surface 41 is located on the imaging side of the lens array. Each positive lens system 5 forming a part of the lens array comprises a telephoto optical system having confocally located two lens groups L1 and L2 with an aperture stop 30 located at the confocal plane of the telephoto optical system.

摘要翻译： 本发明提供一种光学写入线头，其包括多个位于与阵列形式排列的多个正透镜中的每一个相关联的行中的发光器件，并被设计成使得即使当具有发光器件的线头的表面排列在其上时 并且其写入面在光轴方向上波动，与发光点的未对准不存在变化。 线头包括光发射器阵列1，其包括间隔地至少位于主扫描方向上的多个光发射器块4。 每个发光器块4包括沿主扫描方向排列成阵列形式的多个发光器件的至少一行。 一个正透镜系统5位于光发射器阵列1的出射侧并与每个发光块4一致。写入表面41位于透镜阵列的成像侧。 形成透镜阵列的一部分的每个正透镜系统5包括具有共焦位置的两个透镜组L1和L2的远摄光学系统，其中孔径光阑30位于远摄光学系统的共焦平面处。

公开(公告)号：US20100183336A1

公开(公告)日：2010-07-22

申请号：US12628868

申请日：2009-12-01

申请人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

发明人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

IPC分类号： G03G15/04

CPC分类号： G03G15/326 ,  B41J2/451 ,  G03G15/04072 ,  G03G2215/0409

摘要： An optical system of a line head images light emitted from first and second light emitting elements and includes a rotationally symmetric lens having a lens face. A first region of the lens face includes an intersection point of the lens face with the symmetry axis of the lens, and a second region surrounding a periphery of the first region. The shape of a boundary portion between the first and second regions has the relationship 0.5ω

摘要翻译： 线头的光学系统对从第一和第二发光元件发射的光进行成像，并且包括具有透镜面的旋转对称透镜。 透镜面的第一区域包括透镜面与透镜的对称轴线的交点，以及包围第一区域周围的第二区域。 第一和第二区域之间的边界部分的形状具有关系式，其中ω是由第一发光元件发射的第一主光线与第二主光线发射的第一方向角度， 第二发光元件和＆Dgr;＆thetas; 是与边界部分的第一区域的切线在包括对称轴的第一方向横截面处的边界部分处的第二区域的切线形成的角度。

公开(公告)号：US20090091611A1

公开(公告)日：2009-04-09

申请号：US12211679

申请日：2008-09-16

申请人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

发明人： Takeshi SOWA ,  Yujiro NOMURA ,  Ryuta KOIZUMI

IPC分类号： B41J2/45

CPC分类号： B41J2/451

摘要： A line head includes: a positive lens system having two lenses with positive refractive power; an image-side lens array in which the image-side lens of the two lenses is arrayed in a plural number in first and second directions; an object-side lens array in which the object-side lens of the two lenses is arrayed in a plural number in the first and second directions; a light emitter array in which a plurality of light-emitting elements are arrayed on an object side of the positive lens system for the one positive lens system; and an aperture plate that forms an aperture diaphragm, the aperture plate being disposed between the image-side lens array and the object-side lens array so that an image side is telecentric or approximately telecentric. Assuming that the row number of lenses arrayed in the second direction of the image-side lens array is m, a gap between effective regions of the two image-side lenses adjacent to each other in the first direction is α, an image-side angle of aperture (half angle) of the positive lens system is θi, a width (full width) of a plurality of light-emitting element images in the first direction, which are images on image surfaces of the plurality of light-emitting elements arrayed for the one positive lens system, is Wi, a focal length of the image-side lens is f2, and a distance from an image-side principal plane of the image-side lens to the image surface is Si, the following conditions, f2≦(mWi−α)/(2θi), Wi≧2Siθi/(m−1)+α/(m−1), are satisfied.

摘要翻译： 行头包括：正透镜系统，具有两个具有正屈光力的透镜; 其中所述两个透镜的图像侧透镜在第一和第二方向上以多个排列的图像侧透镜阵列; 物镜侧透镜阵列，其中两个透镜的物体侧透镜在第一和第二方向上以多个排列; 在所述正透镜系统的正透镜系统的物体侧排列有多个发光元件的发光体阵列; 以及孔板，其形成孔径光阑，所述孔板设置在图像侧透镜阵列和物体侧透镜阵列之间，使得像侧是远心的或近似远心的。 假设排列在图像侧透镜阵列的第二方向上的透镜的行数为m，则在第一方向上彼此相邻的两个图像侧透镜的有效区域之间的间隔为α，图像侧角 正透镜系统的孔径（半角）是第一方向上的多个发光元件图像的宽度（全宽度），它们是排列成多个发光元件的图像表面上的图像 一个正透镜系统是Wi，图像侧透镜的焦距为f2，从图像侧透镜的图像侧主面到图像面的距离为Si，以下条件f2 < =（mWi-α）/（2thetai），Wi> = 2Sithetai /（m-1）+α/（m-1）。

公开(公告)号：US20100039489A1

公开(公告)日：2010-02-18

申请号：US12603424

申请日：2009-10-21

申请人： Yujiro NOMURA ,  Nozomu INOUE ,  Ryuta KOIZUMI ,  Ken IKUMA

发明人： Yujiro NOMURA ,  Nozomu INOUE ,  Ryuta KOIZUMI ,  Ken IKUMA

IPC分类号： B41J2/447

CPC分类号： G03G15/326 ,  B41J2/45 ,  G03G15/04072 ,  G03G2215/0407 ,  G03G2215/0451

摘要： A line head includes multiple light emitting element groups each including multiple light emitting elements. In each light emitting element group, the multiple light emitting elements are disposed in a two-dimensional arrangement so that a distance Gx is greater than a distance Gy. The light emitting element groups are arranged so that pitches Px are greater than pitches Py.

摘要翻译： 线头包括多个发光元件组，每个发光元件组包括多个发光元件。 在每个发光元件组中，多个发光元件以二维排列设置，使得距离Gx大于距离Gy。 发光元件组被布置成使得间距Px大于间距Py。

公开(公告)号：US20110128594A1

公开(公告)日：2011-06-02

申请号：US12893364

申请日：2010-09-29

申请人： Takeshi SOWA ,  Ken IKUMA ,  Ryuta KOIZUMI ,  Nozomu INOUE

发明人： Takeshi SOWA ,  Ken IKUMA ,  Ryuta KOIZUMI ,  Nozomu INOUE

IPC分类号： H04N1/04

CPC分类号： G03G15/326 ,  B41J2/451 ,  G03G15/04072 ,  G03G15/0409 ,  G03G15/041 ,  G03G15/0415 ,  G03G2215/0456

摘要： Disclosed is an exposure head including a light emitting element array including light emitting elements disposed in a first direction, a light blocking member including an aperture stop through which lights emitted from the light emitting elements pass, and an image forming optical system that makes an image by using the lights having passed through the light blocking member. An absolute value of a magnification in the first direction of the image forming optical system is equal to or more than 0.7 times and is equal to or less than 0.8 times.

摘要翻译： 公开了一种曝光头，其包括发光元件阵列，该发光元件阵列包括沿第一方向设置的发光元件，遮光构件，其包括孔径光阑，通过该孔径光阑从发光元件发出的光通过;以及图像形成光学系统， 通过使用已经通过遮光构件的光。 图像形成光学系统的第一方向上的放大率的绝对值等于或大于0.7倍并且等于或小于0.8倍。

公开(公告)号：US20110043593A1

公开(公告)日：2011-02-24

申请号：US12914408

申请日：2010-10-28

申请人： Ryuta KOIZUMI ,  Yujiro NOMURA ,  Takeshi SOWA

发明人： Ryuta KOIZUMI ,  Yujiro NOMURA ,  Takeshi SOWA

IPC分类号： B41J15/14

CPC分类号： G02B5/001 ,  B41J2/451

摘要： An exposure head, includes: a lens array that includes lenses that are arranged in a first direction and in a second direction orthogonal to the first direction; and a light emitting element substrate that is provided with light emitting elements that emit lights to be imaged by the lenses, wherein a relationship defined by a following formula: 1

摘要翻译： 曝光头包括：透镜阵列，其包括沿与第一方向正交的第一方向和第二方向布置的透镜; 以及发光元件基板，其具有发射由所述透镜成像的光的发光元件，其中满足以下公式所定义的关系：1