公开(公告)号：US07038822B2

公开(公告)日：2006-05-02

申请号：US10438065

申请日：2003-05-15

申请人： Kohji Sakai ,  Seizo Suzuki ,  Hiromichi Atsuumi

发明人： Kohji Sakai ,  Seizo Suzuki ,  Hiromichi Atsuumi

IPC分类号： G02B26/08

CPC分类号： G02B26/0841 ,  B41J2/473

摘要： An optical element can effectively correct misalignment of focused positions of optical spots and an optical spot pitch deviation with respect to image heights due to a refractive index distribution therein. The optical element includes a lens, which serves as an optical system in an optical scanner, is shaped in such a profile that misalignment of a focused position of the optical spot due to the refractive index distribution is corrected for image heights.

公开(公告)号：US06801351B2

公开(公告)日：2004-10-05

申请号：US10278810

申请日：2002-10-24

申请人： Seizo Suzuki ,  Magane Aoki ,  Hiromichi Atsuumi ,  Kohji Sakai

发明人： Seizo Suzuki ,  Magane Aoki ,  Hiromichi Atsuumi ,  Kohji Sakai

IPC分类号： G02B2608

CPC分类号： G02B26/128

摘要： A light source emitting a light flux; a coupling optical system couples the light flux from the light source to a subsequent optical system by transforming it into a parallel light flux, an approximately convergent light flux or an approximately divergent light flux; a light deflector reflects the light flux from the coupling optical system with a deflection reflective surface, and deflects it; a scanning and imaging optical system condenses the deflected light flux from the light deflector onto a surface to be scanned as a beam spot; and a correcting optical system is provided for self correcting shift of focal position of the beam spot on the surface to be scanned occurring due to environmental change or the like. The correcting optical system comprises at least one pair of a resin-made lens having an anamorphic surface having a negative power in each of main scanning direction and sub-scanning direction and a glass-made lens having an anamorphic surface having a positive power at least in sub-scanning direction, and is disposed between the coupling optical system and deflection reflective surface.

摘要翻译： 发射光束的光源; 耦合光学系统将来自光源的光束通过将其变换成平行光束，近似收敛的光束或大致发散的光束而将光束耦合到后续的光学系统; 光偏转器用耦合光学系统反射具有偏转反射表面的光束，并使其偏转; 扫描和成像光学系统将来自光偏转器的偏转光束会聚到待扫描的表面上作为光斑; 并且提供了一种校正光学系统，用于自动校正由于环境变化等而发生的待扫描表面上的束斑的焦点位置偏移。 校正光学系统包括至少一对树脂制透镜，其具有在主扫描方向和副扫描方向各自具有负功率的变形表面，以及具有至少具有正功率的变形表面的玻璃制镜片 并且设置在耦合光学系统和偏转反射表面之间。

公开(公告)号：US06596985B2

公开(公告)日：2003-07-22

申请号：US09788415

申请日：2001-02-21

申请人： Kohji Sakai ,  Seizo Suzuki ,  Hiromichi Atsuumi ,  Akihisa Itabashi

发明人： Kohji Sakai ,  Seizo Suzuki ,  Hiromichi Atsuumi ,  Akihisa Itabashi

IPC分类号： G02B2608

CPC分类号： G02B26/123

摘要： In a multi-beam scanning device and method of the present invention, a semiconductor laser array having a plurality of light emitting parts emitting multiple laser beams is provided. A rotary deflector deflects the laser beams emitted by the light emitting parts of the semiconductor laser array. The deflected laser beams from the rotary deflector is focused onto a scanned surface to form a plurality of beam spots that are separated on the scanned surface in a sub-scanning direction, the scanned surface being scanned simultaneously with the plurality of beam spots in a main scanning direction by a rotation of the rotary deflector. The laser array is configured such that the light emitting parts are arrayed along a line that is at an inclination angle &phgr; to the sub-scanning direction, the inclination angle &phgr; measured in degrees and meeting the conditions 0≦&phgr;

摘要翻译： 在本发明的多光束扫描装置和方法中，提供了具有发射多个激光束的多个发光部的半导体激光器阵列。 旋转偏转器使由半导体激光器阵列的发光部分发射的激光束偏转。 来自旋转偏转器的偏转的激光束被聚焦到扫描的表面上，以形成在扫描的表面上沿副扫描方向分离的多个光束点，扫描的表面与主扫描的多个光束点同时被扫描 通过旋转偏转器的旋转而进行扫描方向。 激光器阵列被构造成使得发光部分沿着与副扫描方向成倾斜角度的线排列，倾斜角度phi以度数测量并满足条件0 <= phi <90，并且该 扫描线间距P，激光器阵列的发光部分的阵列间距rho和由等式定义的参数K，其中，lamb是发射的激光束的波长，ωgaz是副扫描方向上的目标光点直径 ，满足以下条件：

公开(公告)号：US06781729B2

公开(公告)日：2004-08-24

申请号：US10207241

申请日：2002-07-30

申请人： Seizo Suzuki ,  Hiromichi Atsuumi ,  Kohji Sakai

发明人： Seizo Suzuki ,  Hiromichi Atsuumi ,  Kohji Sakai

IPC分类号： G02B2608

CPC分类号： G02B26/125 ,  G02B26/124 ,  G02B27/0031 ,  Y10S359/90

摘要： An optical scanning device employing a scanning imaging optical system that includes a first optical system configured to receive a light flux emitted from a light source, and a second optical system configured to condense the light flux to form a long linear image in a main scanning direction in a vicinity of a deflecting surface of an optical deflector. Also includes is a third optical system configured to condense a light flux deflected by the optical deflector toward a scanned surface to form an optical beam spot on the scanned surface so that a maximum value &Dgr;Mmax and a minimum value &Dgr;Mmin of an amount of change &Dgr;M in an image-surface curvature in the main scanning direction at each image height in an effective writing region with respect to a change &Dgr;T in an environmental temperature satisfy a condition of |(&Dgr;Mmax−&Dgr;Mmin)/&Dgr;T|

摘要翻译： 一种采用扫描成像光学系统的光学扫描装置，包括被配置为接收从光源发射的光束的第一光学系统和被配置为冷凝光束以在主扫描方向上形成长线性图像的第二光学系统 在光偏转器的偏转表面附近。 还包括第三光学系统，其被配置为将由光学偏转器偏转的光束朝向扫描表面冷凝，以在扫描表面上形成光束斑点，使得ΔM的最大值ΔMmax和ΔMmin的最小值DeltaMmin在 相对于环境温度的变化DeltaT，在有效写入区域中的每个图像高度处的主扫描方向上的图像表面曲率满足条件|（ΔMmax-ΔMmin）/ΔT| <0.01（mm /℃） ）。

公开(公告)号：US06771407B2

公开(公告)日：2004-08-03

申请号：US10247702

申请日：2002-09-20

申请人： Yoshinori Hayashi ,  Seizo Suzuki ,  Atsushi Kawamura ,  Hiromichi Atsuumi ,  Kohji Sakai ,  Akihisa Itabashi

发明人： Yoshinori Hayashi ,  Seizo Suzuki ,  Atsushi Kawamura ,  Hiromichi Atsuumi ,  Kohji Sakai ,  Akihisa Itabashi

IPC分类号： G02B2608

CPC分类号： G02B7/028 ,  G02B26/124 ,  G02B26/125

摘要： An optical system includes three optical systems. The first has a coupling lens. The second includes a lens having a positive power in a vertical scanning direction and forms the light flux into a line image extending in the horizontal scanning direction on a deflector. The third includes a first lens having a positive power in the horizontal scanning direction, and a second lens having a positive power in the vertical scanning direction. Lateral magnification in the horizontal scanning direction is set larger than that in the vertical scanning direction. Temperature near the first lens is maintained higher than that near the second lens.

摘要翻译： 光学系统包括三个光学系统。 第一个具有耦合透镜。 第二实施例包括在垂直扫描方向上具有正功率的透镜，并且将光束形成为在偏转器上沿水平扫描方向延伸的线图像。 第三透镜在水平扫描方向具有正功率，在垂直扫描方向具有正功率的第二透镜。 水平扫描方向的横向放大倍率设定为大于垂直扫描方向。 第一透镜附近的温度保持高于第二透镜附近的温度。

公开(公告)号：US06388792B1

公开(公告)日：2002-05-14

申请号：US09612634

申请日：2000-07-07

申请人： Hiromichi Atsuumi ,  Seizo Suzuki ,  Magane Aoki ,  Kohji Sakai

发明人： Hiromichi Atsuumi ,  Seizo Suzuki ,  Magane Aoki ,  Kohji Sakai

IPC分类号： G02B2608

CPC分类号： G02B13/0005

摘要： An optical scanning device deflects one or a plurality of light flux(es) originating from a light source by an optical deflecting unit, gathers the deflected light flux(es) to cause it(them) to form a beam spot(s) on a surface to be scanned by a scanning and image-forming optical system, and, thus, performs optical scanning of the surface to be scanned. The scanning and image-forming optical system includes one or a plurality of optical component(s) including a lens. At least one surface of the lens included in the scanning and image-forming optical system is a sub-non-arc surface having an arc or non-arc shape in a main scanning plane, and a non-arc shape in a sub-scanning plane. The sub-non-arc surface is formed in a lens in which a diameter of a light flux passing through the scanning and image-forming optical system is largest in the sub-scanning plane’.

摘要翻译： 光学扫描装置通过光学偏转单元偏转来自光源的一个或多个光通量，收集偏转的光束以使它们（它们）在一个或多个光束上形成一束光斑 通过扫描和成像光学系统扫描的表面，并且因此对要扫描的表面进行光学扫描。 扫描和成像光学系统包括一个或多个包括透镜的光学部件。 包括在扫描和成像光学系统中的透镜的至少一个表面是在主扫描平面中具有弧或非弧形的亚非弧形表面，并且在副扫描中具有非弧形 飞机 副非弧面形成在副扫描平面'中通过扫描图像形成光学系统的光束的直径最大的透镜中。

公开(公告)号：US06347004B1

公开(公告)日：2002-02-12

申请号：US09369612

申请日：1999-08-06

申请人： Seizo Suzuki ,  Magane Aoki ,  Kohji Sakai

发明人： Seizo Suzuki ,  Magane Aoki ,  Kohji Sakai

IPC分类号： G02B2608

CPC分类号： G02B26/125 ,  Y10S359/90

摘要： An optical scanning apparatus includes a light source for outputting light, a first lens system arranged to receive the light output from the light source and to transmit a light flux therefrom, an optical deflector arranged to receive the light flux from the first lens system and having a deflecting reflective plane to deflect the light flux from a surface therefrom and a second lens system arranged to receive the light flux deflected from the optical deflector and to condense the deflected luminous flux into an optical beam spot on a surface to be scanned so as to form images having image heights, the luminous flux condensed by the second lens system into the optical beam spot including an optical beam waist. The second lens system has a scanning and image forming element including at least one surface including a plurality of portions each having a non-arc shape in a sub-scanning direction such that at least two of the non-arc shapes are different from each other and such that an effective writing width W and a width Fs of the sub-scanned image-surface curvature located within the effective writing width satisfies the condition Fs/W

公开(公告)号：US06256133B1

公开(公告)日：2001-07-03

申请号：US09344633

申请日：1999-06-25

申请人： Seizo Suzuki ,  Magane Aoki ,  Kohji Sakai

发明人： Seizo Suzuki ,  Magane Aoki ,  Kohji Sakai

IPC分类号： G02B2608

CPC分类号： G02B26/125

摘要： An optical scanning apparatus is constructed such that a light beam from a light source is formed into a linear image extending in a main scanning direction and is caused to be deflected at a constant velocity by virtue of a light deflecting system having a deflective reflecting surface which is located in a vicinity of an image formation position of the linear image. The deflected light beam is allowed to transmit through a scanning image formation lens so as to be converged into a beam spot on a surface to be scanned, thus causing the beam spot to scan the surface to be scanned at a constant speed. The scanning image formation lens is formed by more than two lens elements and has at least one special surface special surface in which a sub-scanning curvature changes in a main scanning direction according to a distance from an optical axis toward a periphery of the lens surface such that a line passing through centers of curvature in the sub scanning curvature is curved, and at least one of the special surfaces is formed so that the change of a sub-scanning curvature is non-symmetrical in the main scanning direction and the curvature has at least two or more than two extreme values.

摘要翻译： 光学扫描装置被构造成使得来自光源的光束被形成为在主扫描方向上延伸的线性图像，并且由于具有偏转反射表面的光偏转系统而被以恒定速度偏转， 位于线性图像的图像形成位置附近。 允许偏转的光束通过扫描图像形成透镜传播，以便会聚到要扫描的表面上的光束点中，从而使光斑以恒定的速度扫描待扫描的表面。 扫描图像形成透镜由多于两个透镜元件形成，并且具有至少一个特殊表面特殊表面，其中副扫描曲率沿主扫描方向根据从光轴朝向透镜表面的周边的距离而变化 使得通过在副扫描曲率中的曲率中心的线弯曲，并且形成至少一个特殊表面，使得副扫描曲率的变化在主扫描方向上不对称，并且曲率具有 至少两个或两个以上的极值。

公开(公告)号：US10302767B2

公开(公告)日：2019-05-28

申请号：US15729324

申请日：2017-10-10

申请人： Kazuhiro Akatsu ,  Tadashi Nakamura ,  Kohji Sakai

发明人： Kazuhiro Akatsu ,  Tadashi Nakamura ,  Kohji Sakai

IPC分类号： G01S17/42 ,  G01S7/486 ,  H05B37/02 ,  G01S17/93 ,  G01S7/481 ,  G01S7/484 ,  G01S7/51

摘要： An object detector includes a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters, a light receiver which receives light emitted from the projector, and reflected by an object, and a light source driver which lights on and lights off each of the light emitter groups of the light source.

公开(公告)号：US10148064B2

公开(公告)日：2018-12-04

申请号：US15058730

申请日：2016-03-02

申请人： Kohji Sakai ,  Masataka Uehira ,  Shigeaki Imai ,  Tadashi Nakamura

发明人： Kohji Sakai ,  Masataka Uehira ,  Shigeaki Imai ,  Tadashi Nakamura

IPC分类号： H01S5/042 ,  G01S17/10 ,  G01S17/42 ,  G01S7/484 ,  G01S7/497 ,  G02B26/12 ,  G01S17/02 ,  G01S17/93 ,  G01S7/481

摘要： A semiconductor laser driving apparatus for driving a semiconductor laser serving as a light source for optical scanning, the semiconductor laser driving apparatus includes: first and second switching elements that are each capable of switching energization of the semiconductor laser ON/OFF; a first pulse generation unit that intermittently outputs first driving pulses to the first switching element in a first time slot; and a second pulse generation unit that outputs a second driving pulse to the second switching element in a second time slot different from the first time slot.