公开(公告)号：US07719560B2

公开(公告)日：2010-05-18

申请号：US11923412

申请日：2007-10-24

申请人： Ryuta Koizumi ,  Takeshi Sowa ,  Yujiro Nomura ,  Ken Ikuma

发明人： Ryuta Koizumi ,  Takeshi Sowa ,  Yujiro Nomura ,  Ken Ikuma

IPC分类号： B41J2/45

CPC分类号： B41J2/451

摘要： An optical write line head includes multiple rows of light emitter devices lined up corresponding to respective positive lenses located in array form, wherein even with a fluctuation of its write plane in an optical axis direction, there is none of variations resulting from displacements of light emitting dots. A plurality of light emitter blocks, each including at least one row of light emitter devices lined up in a main scan direction, are located at a spacing in the main scan direction to define a light emitter array. On the exit side of the light emitter array, a lens array including one positive lens system in alignment with each light emitter block is located parallel with the light emitter array, and a write plane is located parallel on the imaging side of the lens array. A stop plate forming an aperture stop is located near a light-gathering position at which parallel light incident from the write plane side on each positive lens system comes together.

摘要翻译： 光写入线头包括对应于位于阵列形式的相应正透镜排列的多排发光器件，其中即使在光轴方向上其写平面的波动，也不存在由发光的位移引起的变化 圆点 沿主扫描方向排列的至少一排发光器件的多个发光器块位于主扫描方向上的间隔，以限定发光器阵列。 在光发射器阵列的出射侧，包括与每个光发射器块对准的一个正透镜系统的透镜阵列与光发射器阵列平行，并且写平面平行于透镜阵列的成像侧。 形成孔径光阑的挡板位于聚光位置附近，在每个正透镜系统上从写平面侧入射的平行光聚集在一起。

公开(公告)号：US07952601B2

公开(公告)日：2011-05-31

申请号：US12358042

申请日：2009-01-22

申请人： Ryuta Koizumi ,  Yujiro Nomura ,  Takeshi Sowa ,  Ken Ikuma

发明人： Ryuta Koizumi ,  Yujiro Nomura ,  Takeshi Sowa ,  Ken Ikuma

IPC分类号： B41J2/45

CPC分类号： G03G15/326 ,  G03G15/04072 ,  G03G15/0435

摘要： An exposure head includes: a lens array in which lenses are disposed in a first direction; and a light-emitting element substrate on which light-emitting elements that emit light to be focused by the lenses are disposed. Length L1 of the lenses in the first direction and length L2 of the lenses in a second direction orthogonal to the first direction have a relation represented by an expression 1

摘要翻译： 曝光头包括：透镜阵列，其中透镜沿第一方向设置; 以及发光元件基板，在该发光元件基板上设置发射由透镜聚焦的光的发光元件。 透镜在第一方向上的长度L1和与第一方向正交的第二方向上的透镜的长度L2具有由表达式1

公开(公告)号：US20080106590A1

公开(公告)日：2008-05-08

申请号：US11923412

申请日：2007-10-24

申请人： Ryuta Koizumi ,  Takeshi Sowa ,  Yujiro Nomura ,  Ken Ikuma

发明人： Ryuta Koizumi ,  Takeshi Sowa ,  Yujiro Nomura ,  Ken Ikuma

IPC分类号： B41J2/45

CPC分类号： B41J2/451

摘要： The invention provides an optical write line head comprising multiple rows of light emitter devices lined up corresponding to the respective positive lenses located in array form, wherein even with a fluctuation of its write plane in an optical axis direction, there is none of variations resulting from displacements of light emitting dots. A plurality of light emitter blocks 4, each including at least one row of light emitter devices lined up in a main scan direction, are located at a spacing in the main scan direction to define a light emitter array 1. On the exit side of the light emitter array 1, a lens array 6 comprising one positive lens system 5 in alignment with each light emitter block 4 is located parallel with the light emitter array 1, and a write plane 41 is located parallel on the imaging side of the lens array 6. A stop plate 30 forming an aperture stop 31 is located near a light-gathering position at which parallel light incident from the write plane side on each positive lens system comes together.

摘要翻译： 本发明提供了一种光学写入线头，包括排列成对应于阵列形式的各个正透镜的多行发光器件，其中即使在光轴方向上写入平面的波动，也不存在由 发光点位移。 多个发光体块4，每个发光体块4包括沿主扫描方向排列的至少一排发光器件，以主扫描方向的间隔设置，以限定发光体阵列1。 在光发射器阵列1的出射侧，包括与每个光发射器块4对准的一个正透镜系统5的透镜阵列6与光发射器阵列1平行，并且写平面41平行于成像 一侧的透镜阵列6。 形成孔径光阑31的挡板30位于聚光位置附近，在每个正透镜系统上从写平面侧入射的平行光聚集在一起。

公开(公告)号：US08194112B2

公开(公告)日：2012-06-05

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： B41J2/45

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：US08089695B2

公开(公告)日：2012-01-03

申请号：US12211667

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： G02B27/10 ,  G02B9/00 ,  G03B27/52

CPC分类号： G02B26/124 ,  G02B3/0006

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 disposed on the object side of the positive lens system 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，其形成设置在正透镜系统的物体侧上的孔径光阑，使得像侧是远心的或近似远心的。 假设在像侧透镜阵列的第二方向上排列的透镜的行数为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，图像侧角度 正透镜系统的孔径（半角）为多个发光元件图像的第一方向上的多个发光元件的图像的宽度（全宽度） 排列为一个正透镜系统的是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＆nlE;（mWi-α）/（2＆Theta; i），Wi≥2Si＆amp; It; i /（m-1）+α/（m-1）。

公开(公告)号：US08184140B2

公开(公告)日：2012-05-22

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： B41J2/45 ,  B41J15/14 ,  B41J27/00

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：US07733363B2

公开(公告)日：2010-06-08

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。 配置在物体侧的一对透镜中的一个的焦距f1满足条件式f1＆nlE; d0 /（1 + W0 / D1）。

公开(公告)号：US08120635B2

公开(公告)日：2012-02-21

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： B41J15/14 ,  B41J27/00

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：US08022975B2

公开(公告)日：2011-09-20

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 ,  B41J27/00

CPC分类号： B41J2/451

摘要： A line head includes a positive lens system having two lenses, image-side and object-side lens arrays, a light emitter array on an object side of the positive lens system, and an aperture plate that forms an aperture diaphragm. Where the row number of lenses arrayed in a second direction is ‘m’, a gap between effective regions of two image-side lenses adjacent to each other in a first direction is ‘α’, an image-side angle of aperture is ‘θi’, a width of light-emitting elements images in the first direction 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 an image surface is ‘Si’, the following conditions are satisfied: f2≦(mWi−α)/(2θi), Wi≧2Siθi/(m−1)+α/(m−1).

摘要翻译： 线头包括具有两个透镜的正透镜系统，图像侧和物体侧透镜阵列，正透镜系统的物体侧上的发光体阵列和形成孔径光阑的孔径板。 在第二方向排列的透镜的行数为“m”的情况下，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隙为“α”，孔径的图像侧角度为“ ; i'中，第一方向上的发光元件图像的宽度为“Wi”，图像侧透镜的焦距为“f2”，距离图像侧透镜的图像侧主面的距离 对于图像面为“Si”，满足以下条件：f2＆nlE;（mWi-α）/（2＆Thetas; i），Wi≥2Si＆Thetas; i /（m-1）+α/（m-1）。

公开(公告)号：US07848023B2

公开(公告)日：2010-12-07

申请号：US12357231

申请日：2009-01-21

申请人： Ryuta Koizumi ,  Yujiro Nomura ,  Takeshi Sowa

发明人： Ryuta Koizumi ,  Yujiro Nomura ,  Takeshi Sowa

IPC分类号： G02B27/10 ,  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