公开(公告)号：US07417777B2

公开(公告)日：2008-08-26

申请号：US11844643

申请日：2007-08-24

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

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

IPC分类号： G02B26/08

CPC分类号： G02B26/124 ,  G02B5/1876 ,  H04N1/1135 ,  H04N2201/0471 ,  H04N2201/04729 ,  H04N2201/04732 ,  H04N2201/04744

摘要： A coupling lens arranged on an optical path of an optical beam from a VCSEL, which has a refraction plane and a diffraction plane that respectively change a power according to a temperature change and suppresses a beam-waist position change in a main-scanning direction and a sub-scanning directions on the scanning surface caused by the temperature change, by a wavelength change of the optical beam caused by power changes of the refraction plane and the diffraction plane and the temperature change. A deflecting unit deflects the optical beam that passed through the coupling lens. A scanning optical system condenses a deflected optical beam on the scanning surface.

摘要翻译： 耦合透镜，布置在来自VCSEL的光束的光路上，所述光束具有根据温度变化分别改变功率的折射面和衍射面，并抑制主扫描方向上的束腰位置变化， 通过由折射平面和衍射面的功率变化引起的光束的波长变化和温度变化，由温度变化引起的扫描表面上的副扫描方向。 偏转单元使通过耦合透镜的光束偏转。 扫描光学系统将偏转的光束冷凝在扫描表面上。

公开(公告)号：US07362486B2

公开(公告)日：2008-04-22

申请号：US11223051

申请日：2005-09-12

申请人： Yoshinori Hayashi ,  Takeshi Ueda ,  Kohji Sakai

发明人： Yoshinori Hayashi ,  Takeshi Ueda ,  Kohji Sakai

IPC分类号： G02B26/08 ,  G02B3/08

CPC分类号： G02B19/0057 ,  G02B7/008 ,  G02B19/0014 ,  G02B26/124 ,  G02B26/125 ,  G02B27/0031 ,  G02B27/4211 ,  G02B27/4227 ,  G02B27/4283

摘要： A first optical system guides a light beam from a light source to an optical deflector, and a second optical system converges the light beam deflected by the optical deflector on a surface to be scanned. The first optical system includes at least one resin lens having a diffractive surface. The second optical system includes at least one resin optical element. A beam diameter depth in a main scanning direction, Wm, that can have a maximum intensity of 1/e2, satisfies conditions Δm1+Δm2+Δm3−Δd1×(f2/f1)2 0 and Δm2

摘要翻译： 第一光学系统将来自光源的光束引导到光学偏转器，并且第二光学系统将由光学偏转器偏转的光束会聚在待扫描的表面上。 第一光学系统包括至少一个具有衍射表面的树脂透镜。 第二光学系统包括至少一个树脂光学元件。 主扫描方向的光束直径深度Wm可以具有最大强度为1 / e <2>的条件满足条件<？in-line-formula description =“In-line Formulas”end = “lead”？> Deltam1 + Deltam2 + Deltam3-Deltad1​​x（f2 / f1） <？in-line-formula description =”In-line Formulas“end =”lead“？> Deltad1​​> 0和Deltam2 <0。 （2）<？in-line-formula description =“In-line Formulas”end =“tail”？>

公开(公告)号：US20080068689A1

公开(公告)日：2008-03-20

申请号：US11850401

申请日：2007-09-05

申请人： Kenichiro SAISHO ,  Yoshinori Hayashi ,  Kohji Sakai

发明人： Kenichiro SAISHO ,  Yoshinori Hayashi ,  Kohji Sakai

IPC分类号： G02B26/10 ,  G02B5/18

CPC分类号： G02B26/125 ,  G02B5/1895 ,  G02B27/0043 ,  G02B27/4227 ,  G02B27/4283

摘要： A diffractive-optical element that is transparent includes a diffraction surface that is formed by a step. A width of the step is set substantially equal to a common multiple of λi/{n(λi)−1} for two or more wavelengths, where λi (i=1, 2, . . . ) is a wavelength and n(λi) is a refractive index with respect to the wavelength λi.

摘要翻译： 透明的衍射光学元件包括通过台阶形成的衍射面。 步长的宽度被设置为基本上等于两个或更多个波长的λ的共同倍数，其中λ_。

公开(公告)号：US20070211326A1

公开(公告)日：2007-09-13

申请号：US11714116

申请日：2007-03-06

申请人： Kenichiroh Saisho ,  Kohji Sakai

发明人： Kenichiroh Saisho ,  Kohji Sakai

IPC分类号： G02B26/08

CPC分类号： G02B26/125

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：US07034973B2

公开(公告)日：2006-04-25

申请号：US10391580

申请日：2003-03-20

申请人： Kohji Sakai

发明人： Kohji Sakai

IPC分类号： G02B26/08

CPC分类号： G02B26/125

摘要： A scanning optical system condensing a light flux deflected by an optical deflector so as to form an optical spot on a surface to be scanned, includes a unitary lens, wherein: a lens configuration in a main scanning cross section is both surfaces with a convex configuration; a lens configuration in a sub-scanning cross section is both surfaces with a convex configuration; both surfaces of the lens are anamorphic surfaces; and a lateral magnification β2 in a sub-scanning direction of a central image height of said optical system satisfies the following condition (1): 0.5≦|β2|≦3.0.   (1)

摘要翻译： 一种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光点的扫描光学系统包括单一透镜，其中：主扫描横截面中的透镜构造是具有凸形构造的两个表面 ; 副扫描横截面中的透镜构造是具有凸形构造的两个表面; 透镜的两个表面都是变形表面; 并且在所述光学系统的中心图像高度的副扫描方向上的横向放大倍数β2满足以下条件（1）：<？in-line-formula description =“在线公式 “end =”lead“？> 0.5 <= | beta 2 <= 3.0。 （1）<？in-line-formula description =“In-line Formulas”end =“tail”？>

公开(公告)号：US10209133B2

公开(公告)日：2019-02-19

申请号：US15454223

申请日：2017-03-09

申请人： Kohji Sakai ,  Kazuhiro Akatsu

发明人： Kohji Sakai ,  Kazuhiro Akatsu

IPC分类号： G01N21/00 ,  G01J3/50 ,  G01J3/02 ,  G01J3/10 ,  H01S5/068 ,  H04N9/31 ,  G01J3/46 ,  H01S5/00 ,  H01S5/06 ,  H01S5/0683 ,  H01S5/40 ,  H05B33/08

摘要： A wavelength estimation device including a light detector to receive light emitted from a light source and an estimation unit. The estimation unit estimates a wavelength of the light based on an amount of light received by the light detector.

公开(公告)号：US09925798B2

公开(公告)日：2018-03-27

申请号：US15440907

申请日：2017-02-23

申请人： Naoto Watanabe ,  Toshiaki Tokita ,  Kohji Sakai ,  Nobuaki Kubo ,  Masayuki Muranaka

发明人： Naoto Watanabe ,  Toshiaki Tokita ,  Kohji Sakai ,  Nobuaki Kubo ,  Masayuki Muranaka

IPC分类号： B41J2/47 ,  G02B26/12 ,  G03G15/043 ,  G03G15/00

CPC分类号： B41J2/473 ,  B41J2/471 ,  G02B26/123 ,  G02B26/127 ,  G02B26/129 ,  G03G15/043 ,  G03G15/505

摘要： An optical scanning apparatus includes a light source, an optical deflector having a rotary polygon mirror to deflect a light beam from the light source, a scanning optical system configured to focus the light beam deflected by the optical deflector on a target surface, a sync detecting sensor configured to determine a write start timing on the target surface, and a processing unit configured to correct detection data of the sync detecting sensor based on a measured value of a time needed for one revolution of the rotary polygon mirror.

公开(公告)号：US20170082747A1

公开(公告)日：2017-03-23

申请号：US15371650

申请日：2016-12-07

申请人： KAZUHIRO AKATSU ,  Tadashi Nakamura ,  Kohji Sakai

发明人： KAZUHIRO AKATSU ,  Tadashi Nakamura ,  Kohji Sakai

IPC分类号： G01S17/42 ,  G01S7/484 ,  G01S7/51 ,  G01S17/93

CPC分类号： G01S17/42 ,  G01S7/4815 ,  G01S7/484 ,  G01S7/4868 ,  G01S7/51 ,  G01S17/936 ,  H05B37/0227

摘要： An object detector includes a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, ach 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：US09557563B2

公开(公告)日：2017-01-31

申请号：US14722559

申请日：2015-05-27

申请人： Mitsuo Suzuki ,  Kohji Sakai

发明人： Mitsuo Suzuki ,  Kohji Sakai

IPC分类号： B41J2/45 ,  B41J2/47 ,  G02B26/12 ,  G03G15/04 ,  G03G15/043

CPC分类号： G02B26/127 ,  B41J2/45 ,  B41J2/473 ,  B41J2002/453 ,  G02B26/12 ,  G02B26/123 ,  G03G15/04072 ,  G03G15/0435

摘要： An optical scanning device includes: a light source that emits a laser beam modulated and driven according to an image forming signal; a scanning optical system that includes a polygon mirror to scan a surface of a photoconductor with the laser beam from the light source; a surface identifying unit that associates a sub-scanning position by the polygon mirror with each surface of the polygon mirror; and a light-amount adjusting unit that adjusts a light amount of the light source according to the sub-scanning position, for each surface of the polygon mirror.

摘要翻译： 光学扫描装置包括：光源，发射根据图像形成信号调制和驱动的激光束; 扫描光学系统，其包括用来自光源的激光束扫描光电导体的表面的多面镜; 表面识别单元，其将多面镜的副扫描位置与多面镜的每个表面相关联; 以及光量调节单元，用于对所述多面镜的每个表面调整根据所述副扫描位置的所述光源的光量。

公开(公告)号：US20150160341A1

公开(公告)日：2015-06-11

申请号：US14554498

申请日：2014-11-26

申请人： Kazuhiro AKATSU ,  Tadashi Nakamura ,  Kohji Sakai

发明人： Kazuhiro AKATSU ,  Tadashi Nakamura ,  Kohji Sakai

IPC分类号： G01S17/42 ,  H05B37/02 ,  G01B11/24

CPC分类号： G01S17/42 ,  G01S7/4815 ,  G01S7/484 ,  G01S7/4868 ,  G01S7/51 ,  G01S17/936 ,  H05B37/0227

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.

摘要翻译： 一种物体检测器包括：投影仪，包括具有二维布置的多个发光体组的光源，每个发光体组具有多个发光体;受光器，接收从投影仪发出的光，并由 物体和光源驱动器，其点亮并点亮光源的每个发光体组。