公开(公告)号：US20080025759A1

公开(公告)日：2008-01-31

申请号：US11782268

申请日：2007-07-24

申请人： Daisuke Ichii ,  Yoshinori Hayashi ,  Takeshi Ueda ,  Kohji Sakai ,  Kenichiro Saisho

发明人： Daisuke Ichii ,  Yoshinori Hayashi ,  Takeshi Ueda ,  Kohji Sakai ,  Kenichiro Saisho

IPC分类号： G03G15/045 ,  G02B26/08

CPC分类号： G03G15/326 ,  B41J2/455 ,  B41J2/473 ,  G02B13/0005 ,  G02B26/125 ,  G03G15/0435 ,  G03G2215/0404

摘要： An optical scanning device includes a light source having light emitting points for emitting light beams, a coupling optical element that couples the light beams, a deflecting unit that deflects and scans the light beams, and a scanning optical system that focus the light beams to form an image. The optical scanning device satisfies the following condition: F tan(θ/2)+A

摘要翻译： 光学扫描装置包括具有用于发射光束的发光点的光源，耦合光束的耦合光学元件，偏转和扫描光束的偏转单元，以及聚焦光束以形成的扫描光学系统 一个图像。 光扫描装置满足以下条件：<？in-line-formula description =“In-line formula”end =“lead”？> F tan（θ/ 2）+ A 其中A是发光点和耦合光学元件的光轴之间的最大距离，θ是发散角（全宽半最大值） 的光束，F是耦合光学元件的焦距，D是耦合光学元件的有效半径。

公开(公告)号：US20070211324A1

公开(公告)日：2007-09-13

申请号：US11714162

申请日：2007-03-06

申请人： Kohji Sakai ,  Yoshinori Hayashi ,  Daisuke Ichii

发明人： Kohji Sakai ,  Yoshinori Hayashi ,  Daisuke Ichii

IPC分类号： G02B26/08

CPC分类号： G02B26/125 ,  G02B26/124 ,  G02B27/0031 ,  G02B27/0037 ,  G02B27/4227 ,  G02B27/4283

摘要： An optical scanning device includes a first optical element that converts a cross-section shape of a light beam from a semiconductor laser to a desired shape; a second optical element that guides the light beam output from the first optical element to an optical deflector that deflects the light beam; and a third optical element that gathers the light beam deflected by the optical deflector onto a surface to be scanned to form a light spot thereby optically scanning the surface. At least one of the first optical element, the second optical element, and the third optical element includes a resin-made lens, at least one of the resin-made lenses has a power diffracting surface, and a surface shape of at least one of power diffracting surfaces is formed so that a power of a diffracting portion and a power of a refractive portion are cancelled out.

摘要翻译： 光学扫描装置包括将来自半导体激光器的光束的横截面形状转换为期望形状的第一光学元件; 第二光学元件，其将从第一光学元件输出的光束引导到偏转光束的光学偏转器; 以及第三光学元件，其将由所述光学偏转器偏转的光束聚集到待扫描的表面上以形成光点，从而光学扫描所述表面。 第一光学元件，第二光学元件和第三光学元件中的至少一个包括树脂制的透镜，树脂制透镜中的至少一个具有功率衍射面， 形成功率衍射面，使得衍射部分的功率和折射部分的功率被抵消。

公开(公告)号：US07215354B1

公开(公告)日：2007-05-08

申请号：US09678611

申请日：2000-10-04

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

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

IPC分类号： B41J27/00

CPC分类号： G02B26/125 ,  G02B13/0005

摘要： A scanning optical system condensing a beam deflected by an optical deflector so as to form a beam spot on a surface to be scanned, comprises two lenses. A lens on the side of optical deflector has a negative refracting power in sub-scanning direction. A lens on the side of surface to be scanned has a positive refracting power in the sub-scanning direction. At least one lens surface of the lens surfaces of the two lenses is such that a shape in a sub-scanning section thereof is a non-arc shape.

摘要翻译： 一种扫描光学系统，其将由光学偏转器偏转的光束聚光以在待扫描的表面上形成束斑，包括两个透镜。 光偏转器一侧的透镜在副扫描方向上具有负的折射光焦度。 待扫描表面一侧的透镜在副扫描方向上具有正折射力。 两个透镜的透镜表面的至少一个透镜表面使得其副扫描部分中的形状为非弧形。

公开(公告)号：US20060187294A1

公开(公告)日：2006-08-24

申请号：US11340646

申请日：2006-01-27

申请人： Kenichiroh Saisho ,  Kohji Sakai

发明人： Kenichiroh Saisho ,  Kohji Sakai

IPC分类号： B41J2/435

CPC分类号： B41J2/473 ,  G02B13/08 ,  G02B26/125

摘要： A scanning optical system includes converges, with a single lens, a divergent luminous flux, which is deflected in a main scanning direction by an optical deflector, on a surface of a scan target. The lens has two surfaces in a biconvex shape in both the main scanning direction and a sub-scanning direction, and at least one of the surfaces is a toric surface in which a line that connects, on a cross section in the main scanning direction, centers of curvature in a cross section in the sub-scanning direction is nonlinear, and change of the curvature of the toric surface in the cross section in the sub-scanning direction along the main scanning direction is asymmetric with an optical axis of the lens. The surfaces are anamorphic surfaces.

摘要翻译： 扫描光学系统包括具有单个透镜的在光学偏转器的主扫描方向上偏转的发散光束在扫描对象的表面上的会聚。 透镜具有在主扫描方向和副扫描方向上具有双凸形状的两个表面，并且至少一个表面是复曲面，其中在主扫描方向的横截面上连接的线， 沿副扫描方向的横截面中的曲率中心是非线性的，沿着主扫描方向的副扫描方向的截面中的复曲面的曲率的变化与透镜的光轴不对称。 表面是变形表面。

公开(公告)号：USRE38195E1

公开(公告)日：2003-07-22

申请号：US09421332

申请日：1999-10-18

申请人： Kohji Sakai ,  Magane Aoki

发明人： Kohji Sakai ,  Magane Aoki

IPC分类号： G02B2608

CPC分类号： G02B26/123

摘要： A multi-beam optical scanner, in which a lateral magnification &bgr; in a composite system of an optical system between the light source for a multi-beam and the scanned surface satisfies the condition: 2

摘要翻译： 一种多光束光学扫描器，其中在用于多光束的光源和扫描的表面之间的光学系统的复合系统中的横向放大率β满足条件：2 <β≤8.5，以及多个光 扫描表面上的斑点执行彼此相邻的扫描线的光学扫描。

公开(公告)号：US06509995B1

公开(公告)日：2003-01-21

申请号：US09653330

申请日：2000-08-31

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，并且玻璃制镜片具有至少具有正功率的变形表面 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：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：US5831758A

公开(公告)日：1998-11-03

申请号：US868737

申请日：1997-06-04

申请人： Kohji Sakai ,  Magane Aoki

发明人： Kohji Sakai ,  Magane Aoki

IPC分类号： B41J2/44 ,  G02B13/18 ,  G02B13/24 ,  G02B26/10 ,  G02B26/12 ,  H04N1/113 ,  G02B26/08

CPC分类号： G02B26/123

摘要： A multi-beam optical scanner, in which a lateral magnification .beta. in a composite system of an optical system between the light source for a multi-beam and the scanned surface satisfies the condition: 2

摘要翻译： 一种多光束光学扫描器，其中在用于多光束的光源和扫描的表面之间的光学系统的复合系统中的横向放大率β满足条件：2 <β= 8.5，以及多个 被扫描表面上的光点执行彼此相邻的扫描线的光学扫描。

公开(公告)号：US10591602B2

公开(公告)日：2020-03-17

申请号：US16384629

申请日：2019-04-15

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：US10534112B2

公开(公告)日：2020-01-14

申请号：US16230497

申请日：2018-12-21

申请人： Kohji Sakai ,  Miho Higuchi ,  Jun Watanabe

发明人： Kohji Sakai ,  Miho Higuchi ,  Jun Watanabe

IPC分类号： G02B3/00 ,  G02B27/48 ,  G02B27/01 ,  B60K35/00 ,  G03B29/00 ,  G03B21/625 ,  H04N9/31 ,  G03B21/20 ,  G03B21/00

摘要： A microlens array includes N lenses ranging from a 1st lens to an Nth lens and a lens arrangement area. N is a positive integer. The lens arrangement area has the N lenses arranged in array. The lens arrangement area receives light emitted from a light source. An ith (i being 1st to Nth) lens satisfies a conditional expression below: −20°≤θ≤20° where θ denotes an angle formed by a main-axis orientation of double refraction and a reference orientation.