公开(公告)号：US20100034563A1

公开(公告)日：2010-02-11

申请号：US12534896

申请日：2009-08-04

申请人： Hiroyoshi Funato ,  Kazunori Bannai ,  Daisuke Imaki ,  Yoshinori Hayashi ,  Makoto Hirakawa

发明人： Hiroyoshi Funato ,  Kazunori Bannai ,  Daisuke Imaki ,  Yoshinori Hayashi ,  Makoto Hirakawa

IPC分类号： G03G15/04 ,  G02B26/10

CPC分类号： G02B26/123 ,  G02B26/125 ,  G02B27/283 ,  G03G15/011 ,  G03G15/04036 ,  G03G15/0435 ,  G03G2215/0404

摘要： P-polarized light beam passing through an fθ lens passes through a polarization beam splitter, is converted into S-polarized light beam by a quarter-wave plate and a reflecting mirror, re-enters the polarization beam splitter, and is reflected at the polarization beam splitter in the −Z direction. An optical path of a light beam between a polygon mirror and the fθ lens, between the fθ lens and the polarization beam splitter, between the polarization beam splitter and the quarter-wave plate, between the quarter-wave plate and a reflecting mirror, between the reflecting mirror and the quarter-wave plate, and between the quarter-wave plate and the polarization beam splitter are in the same plane.

摘要翻译： 通过透镜透镜的P偏振光束通过偏振分束器，通过四分之一波片和反射镜转换成S偏振光束，重新进入偏振分束器，并以偏振反射 分束器在-Z方向。 在多面镜和透镜之间的光束之间的光路，在透镜和偏振分束器之间，在偏振分束器和四分之一波片之间，在四分之一波片和反射镜之间，在 反射镜和四分之一波片，四分之一波片和偏振分束器之间在同一平面内。

公开(公告)号：US20090060582A1

公开(公告)日：2009-03-05

申请号：US12190182

申请日：2008-08-12

申请人： Daisuke ICHII ,  Makoto Hirakawa

发明人： Daisuke ICHII ,  Makoto Hirakawa

IPC分类号： G03G15/04

CPC分类号： G03G15/0435

摘要： In an optical scanning device, a lateral magnification in a direction corresponding to a sub scanning direction of an optical system is adjusted to be small by a coupling optical system that includes a first lens and a second lens. As a result, scanning by a plurality of light beams can be performed with high precision while avoiding high costs.

摘要翻译： 在光学扫描装置中，通过包括第一透镜和第二透镜的耦合光学系统将与光学系统的副扫描方向相对应的方向上的横向放大率调整到较小。 结果，可以以高精度执行多个光束的扫描，同时避免高成本。

公开(公告)号：US07385181B2

公开(公告)日：2008-06-10

申请号：US11717009

申请日：2007-03-13

申请人： Naoki Miyatake ,  Makoto Hirakawa

发明人： Naoki Miyatake ,  Makoto Hirakawa

IPC分类号： H01J40/14 ,  G02B26/08

CPC分类号： B41J2/473 ,  G02B26/123 ,  H04N1/1135

摘要： Light beams emitted from a plurality of light source devices are deflected by a shared light deflector. The light beams are respectively concentrated on different scanning subjects using a first scanning lens and second scanning lenses and are used to perform a scan. All light beams make an angle in a sub-scanning direction to a normal line of a reflecting surface of the light deflector. An incidence surface of the first scanning lens is a surface of which a curvature in the sub-scanning direction changes depending on a main scanning direction. The incidence surface of the first scanning lens is also an optical surface of which a negative refracting power becomes stronger toward a periphery of the surface in the main scanning direction.

摘要翻译： 从多个光源装置发射的光束被共用的光偏转器偏转。 光束分别集中在使用第一扫描透镜和第二扫描透镜的不同扫描对象上，并用于执行扫描。 所有光束在副扫描方向上与光偏转器的反射表面的法线成一角度。 第一扫描透镜的入射面是副扫描方向的曲率根据主扫描方向而变化的表面。 第一扫描透镜的入射面也是在主扫描方向上朝向表面周边的负折射力变强的光学面。

公开(公告)号：US20070002417A1

公开(公告)日：2007-01-04

申请号：US11453842

申请日：2006-06-16

申请人： Makoto Hirakawa ,  Naoki Miyatake

发明人： Makoto Hirakawa ,  Naoki Miyatake

IPC分类号： G02B26/08

CPC分类号： G02B26/125 ,  G02B26/123 ,  H04N1/1135 ,  H04N1/12

摘要： An optical scanning device includes a light deflector that deflects light beams from a light source device and an optical scanning optical system that focuses the light beams deflected by the light deflector on a surface to be scanned, wherein the light beams are made incident on a deflective reflection surface of the light deflector at an angle in a sub-scanning direction with respect to a normal of the deflective reflection surface. The optical scanning optical system has at least one scanning focus lens, and at least one lens surface of the scanning focus lens is a surface, curvature in the sub-scanning direction of which changes according to an image height, and is a surface, curvature in the sub-scanning direction of which on a reference axis of the lens is zero or substantially zero, in order to effectively correct a scanning line curve and deterioration in a wavefront aberration.

摘要翻译： 一种光学扫描装置包括一个光偏转器，它使来自一个光源装置的光束和一个光学扫描光学系统偏转，该光学扫描光学系统将由偏光板偏转的光束聚焦在待扫描的表面上，其中光束入射到偏转 光偏转器的反射面相对于偏转反射面的法线在副扫描方向成一定角度。 光扫描光学系统具有至少一个扫描聚焦透镜，并且扫描对焦透镜的至少一个透镜表面是其副扫描方向的曲率根据图像高度而变化，并且是表面曲率 在透镜的基准轴的副扫描方向为零或基本上为零时，为了有效地校正扫描线曲线和波前像差的劣化。

公开(公告)号：US06829102B2

公开(公告)日：2004-12-07

申请号：US10391299

申请日：2003-03-19

申请人： Kazuyasu Ohashi ,  Makoto Hirakawa

发明人： Kazuyasu Ohashi ,  Makoto Hirakawa

IPC分类号： G02B1514

CPC分类号： G02B15/177 ,  G02B7/102

摘要： A zoom lens comprising a first group of lenses (1) having negative focal length, a second group of lenses (2) having positive focal length, and a third group of lenses (3 having the positive focal length in order from an object side, in which the second group of lenses (2) moves monotonically from an image side to the object side and the first group of lenses 1 moves so as to correct shift in a position of an image surface, which is attended with a change in magnification, when the magnification is changed from an end of short focus to the end of long focus. The zoom lens is characterized in that the first group of lenses 1 has at least two lenses (L1) and (L2) and an air lens formed between the two lenses, both sides of the air lens are the aspheric surface, and the first group of lenses satisfies the following conditional expressions of no>1.50 and ni>1.60, where no indicates a refractive index to d line of the lens arranged on the object side in the air lens and ni indicates the refractive index to the d line of the lens arranged on the image side in the air lens.