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21. 发明申请

US20070211324A1 Optical scanning device and image forming apparatus 有权
标题翻译：光学扫描装置和图像形成装置
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。

22. 发明授权

US07973990B2 Optical scanning device, optical writing device, and image forming apparatus 有权
公开(公告)号：US07973990B2
公开(公告)日：2011-07-05
申请号：US11740070
申请日：2007-04-25
申请人： Kohji Sakai , Yoshinori Hayashi , Takeshi Ueda , Daisuke Ichii , Kenichiroh Saisho
发明人： Kohji Sakai , Yoshinori Hayashi , Takeshi Ueda , Daisuke Ichii , Kenichiroh Saisho
IPC分类号： G02B26/08
CPC分类号： G02B27/42 , G02B26/124 , G02B27/4227 , G02B27/4283
摘要： An optical scanning device includes a first optical system for guiding light beams emitted from a plurality of light emitting units to an optical deflector, and a second optical system for focusing the light beams to optically scan a surface to be scanned. At least one of the first optical system and the second optical system includes a resin lens having a diffractive surface. The diffractive surface includes a diffractive portion and a refractive portion. A power of the diffractive portion and a power of the refractive portion cancel each other.

23. 发明授权

US07843482B2 Multi-beam optical scanning device and image forming apparatus 有权
标题翻译：多光束光学扫描装置和成像装置
公开(公告)号：US07843482B2
公开(公告)日：2010-11-30
申请号：US11773076
申请日：2007-07-03
申请人： Takeshi Ueda , Kohji Sakai , Yoshinori Hayashi
发明人： Takeshi Ueda , Kohji Sakai , Yoshinori Hayashi
IPC分类号： B41J15/14 , B41J27/00 , G02B26/08
CPC分类号： G02B26/123 , G02B26/124 , G02B26/125
摘要： A multi-beam scanning device is disclosed that is able to realize a stable and small beam spot and realize stable scanning line intervals between plural light beams. The multi-beam optical scanning device includes a first optical system which has a first lens for coupling the light beams from the light sources, and a second lens which is an anamorphic element having power at least in a sub scanning direction and for guiding the light beams from the first lens to the deflection unit; and a second optical system. At least the second lens includes a diffracting surface having power. Magnifications of the whole optical system in a main scanning direction (βm0) and in a sub scanning direction (βs0), and a magnification of the second optical system (βs2) in a sub scanning direction satisfy |βm0|>|βs0|, and |βs0|>|s2|, and the power of the diffracting surface of the first lens in the main scanning direction (P1m), that in the sub scanning direction (P1s), and the power of the diffracting surface of the second lens in the sub scanning direction (P2s) satisfy |P2s|>|P1m| and |P2s|>|P1s|.
摘要翻译：公开了一种多光束扫描装置，其能够实现稳定且小的光点，并实现多个光束之间的稳定的扫描线间隔。多光束光学扫描装置包括第一光学系统，其具有用于耦合来自光源的光束的第一透镜和作为至少在副扫描方向上具有功率并用于引导光的变形元件的第二透镜从第一透镜到偏转单元的光束; 和第二光学系统。至少第二透镜包括具有光焦度的衍射表面。整个光学系统在主扫描方向（＆amp; bgr; m0）和副扫描方向（＆bgr; s0）上的放大率以及副扫描方向上的第二光学系统（＆bgr; s2）的倍率满足|＆bgr; 第一透镜的主扫描方向（P1m）的衍射面的功率，副扫描方向（P1s），第二透镜并且第二透镜的副扫描方向（P2s）的衍射面的功率满足| P2s |> | P1m | 和| P2s |> | P1s |。

24. 发明授权

US07672032B2 Optical scanner and image forming apparatus using optical scanner 有权
标题翻译：光学扫描仪和使用光学扫描仪的成像设备
公开(公告)号：US07672032B2
公开(公告)日：2010-03-02
申请号：US11857811
申请日：2007-09-19
申请人： Yoshinori Hayashi , Kohji Sakai , Takeshi Ueda , Daisuke Ichii , Kenichiroh Saisho
发明人： Yoshinori Hayashi , Kohji Sakai , Takeshi Ueda , Daisuke Ichii , Kenichiroh Saisho
IPC分类号： G02B26/08
CPC分类号： G02B26/127 , G02B27/40
摘要： An optical axis of at least one surface of a resin-made diffracting lens is shifted in a main scanning direction with respect to an incident beam. A synchronous detection can cancel a problem of a misalignment in the main scanning direction due to a temperature variation. A light reflected from a second surface of the resin-made diffractive lens condenses on a position that is displaced in an optical axis direction from an optical beam outgoing point of a semiconductor laser, and thereby the light reflected again from the semiconductor laser does not form an image on a scanned surface and an impact on the image becomes low.
摘要翻译：树脂衍射透镜的至少一个表面的光轴相对于入射光束在主扫描方向上偏移。同步检测可以消除由于温度变化而导致的主扫描方向上的未对准的问题。从树脂衍射透镜的第二表面反射的光在从半导体激光器的光束出射点沿光轴方向位移的位置聚集，从而半导体激光器再次反射的光不形成扫描表面上的图像和对图像的影响变低。

25. 发明授权

US07443558B2 Optical scanning device and image forming apparatus 有权
标题翻译：光学扫描装置和图像形成装置
公开(公告)号：US07443558B2
公开(公告)日：2008-10-28
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。

26. 发明授权

US06771407B2 Optical scanner and image formation apparatus 有权
标题翻译：光学扫描仪和图像形成装置
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。

27. 发明授权

US10302767B2 Object detector and sensor 有权
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.

28. 发明授权

US10148064B2 Semiconductor laser driving apparatus, optical scanning apparatus, object detection apparatus, and mobile apparatus 有权
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.

29. 发明授权

US10031228B2 Object detecting apparatus 有权
公开(公告)号：US10031228B2
公开(公告)日：2018-07-24
申请号：US14523042
申请日：2014-10-24
申请人： Kohji Sakai , Tadashi Nakamura
发明人： Kohji Sakai , Tadashi Nakamura
IPC分类号： G01C3/08 , G01S17/02 , G01S17/42 , G01S17/58 , G01S17/93 , G01S7/481 , G01S7/484 , G06K9/00 , G06K9/20 , G08G1/16
摘要： An object detecting apparatus includes: a light projection unit that is an array light source in which each of a plurality of light emission areas emits light, an optical scanning unit that performs scanning with the light, which is emitted from the light projection unit, in a first direction, and a light receiving unit that receives reflected light which is the light, with which the scanning is performed, being reflected by an object, and an object information acquiring unit that detects presence/absence of the object based on emission timing at which the light is emitted from the light projection unit and light receiving timing at which the light receiving unit receives the reflected light.

30. 发明申请

US20150042740A1 IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS 有权
标题翻译：图像形成方法和图像形成装置
公开(公告)号：US20150042740A1
公开(公告)日：2015-02-12
申请号：US14451815
申请日：2014-08-05
申请人： Hiroyuki SUHARA , Hiroaki TANAKA , Kohji Sakai
发明人： Hiroyuki SUHARA , Hiroaki TANAKA , Kohji Sakai
IPC分类号： B41J2/385
CPC分类号： G03G15/043
摘要： An image forming method includes: exposing a surface of an image carrier with a light based on an image pattern including an image portion and a non-image portion to form an electrostatic latent image corresponding to the image pattern. The image portion is made up of a plurality of pixels. Some of the pixels that make up the image portion are exposed with light of a first output value that is higher than a prescribed optical output value when the entire pixels corresponding to the image portion are exposed over a prescribed time period.
摘要翻译：一种图像形成方法包括：基于包括图像部分和非图像部分的图像图案，用光曝光图像载体的表面，以形成与图像图案相对应的静电潜像。图像部分由多个像素组成。当对应于图像部分的整个像素在规定的时间段内曝光时，构成图像部分的一些像素被曝光，该光的第一输出值高于规定的光学输出值。

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