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1. 发明专利

JP2006235369A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2006235369A
公开(公告)日：2006-09-07
申请号：JP2005051604
申请日：2005-02-25
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： IZUMI YASUTAKA , ATSUMI HIROMICHI , HAYASHI YOSHIAKI
IPC分类号： G02B26/10 , G02B13/00 , G02B13/08 , G02B13/18 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To ensure rigidity of a lens located more on the scanned surface side from a deflecting means such as a polygon mirror by enabling the deflecting means to rotate fast with low energy by reducing the size of the deflecting means in its axis of rotation.
SOLUTION: An optical scanner configured so that pieces of luminous flux deflected by a common deflecting means 7 on the same side about its axis of rotation are separated closely to one another in a vertical scanning direction and each of sets of scanning optical systems has a plurality of lenses 8 and 10 between the deflecting means 7 and corresponding surfaces to be scanned, while the 1st lens and 2nd lens such that the power of the 1st lens 8 in a horizontal scanning direction is larger than the power of the 2nd lens 10 in the horizontal scanning direction and the power of the 1st lens in the vertical scanning lens is less than the power of the 2nd lens 10 in the vertical scanning direction are present as individual lenses in each scanning optical system satisfies large/small relations Wm>Wn and hm
摘要翻译：要解决的问题：为了通过使偏转装置能够以低能量快速旋转，通过减小偏转装置的尺寸来确保更多地位于扫描表面侧上的透镜从诸如多面镜的偏转装置的刚度其旋转轴。解决方案：一种光学扫描器，其构造成使得由同一侧的公共偏转装置7绕其旋转轴线偏转的光束在垂直扫描方向上彼此紧密地彼此分离，并且每组扫描光学系统在偏转装置7和相应的待扫描表面之间具有多个透镜8和10，而第一透镜和第二透镜使得第一透镜8在水平扫描方向上的光焦度大于第二透镜的光焦度在垂直扫描透镜中的第一透镜的功率小于第二透镜10在垂直扫描方向上的光焦度存在时，每个扫描光学系统中的各个透镜满足大/小关系Wm> Wn和hm

2. 发明专利

JP2004109782A Optical scanning device and image forming apparatus 审中-公开
公开(公告)号：JP2004109782A
公开(公告)日：2004-04-08
申请号：JP2002274912
申请日：2002-09-20
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： IZUMI YASUTAKA , KAWAMURA ATSUSHI
IPC分类号： G02B26/10 , G02B26/12 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an optical scanning device for improving optical characteristics, obtaining the images of prescribed quality even when the tolerance of the deflection reflection surface accuracy dispersion of a polygon mirror is loosened and suppressing the manufacture cost of the polygon mirror by adjusting a beam waist position by a variable focus optical element for each deflection reflection surface of the polygon mirror, and to provide an image forming apparatus using the optical scanning device. SOLUTION: The optical scanning device is provided with a light source 41 for emitting a luminous flux, the polygon mirror 32 for deflecting the luminous flux from the light source 41, and scanning optical systems 33 and 34 for converting the deflected luminous flux on a surface to be scanned. The device is provided with a sensor 37 for detecting the surface of the polygon mirror 32 and the variable focus optical element 42 arranged between the light source 41 and the polygon mirror 32 and operated corresponding to the surface information of the polygon mirror 32 detected by the sensor 37. COPYRIGHT: (C)2004,JPO

3. 发明专利

JP2008256865A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2008256865A
公开(公告)日：2008-10-23
申请号：JP2007097796
申请日：2007-04-03
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： IZUMI YASUTAKA
IPC分类号： G02B26/10 , B41J2/44 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To reduce a bend of a scanning line and the variation in the bend of the scanning line caused by the deformation due to nonuniform temperature rise of an optical element due to the local heat generation in a deflector or the like.
SOLUTION: The optical element 1 is mounted on a housing 3 via a projection part 2, a member 4 is inserted between the optical element 1 and the housing 3. The member 4 is made of an elastic material which is more flexible than the optical element 1 and the housing 3, and a through hole is formed at a position corresponding to the projection part 2 provided on the optical element 1 for inserting the projection part 2. When the housing 3 generates heat, the projection part 2 of the optical element 1 and the member 4, both having small difference in heat conduction rates from each other, uniformly conduct the heat to the optical element 1 and do not generate the bend in a subscanning direction.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了减少扫描线的弯曲和由于偏转器中的局部发热引起的由于光学元件的不均匀温度升高引起的变形引起的扫描线的弯曲变化，或喜欢。解决方案：光学元件1通过突出部分2安装在壳体3上，构件4插入到光学元件1和壳体3之间。构件4由弹性材料制成，该弹性材料比光学元件1和壳体3以及通孔形成在与设置在光学元件1上的用于插入突出部2的突起部2对应的位置。当壳体3产生热量时，突起部2 光导元件1和导热率差异小的构件4均匀地将热传导到光学元件1，并且不会在副扫描方向上产生弯曲。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2006259574A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2006259574A
公开(公告)日：2006-09-28
申请号：JP2005080103
申请日：2005-03-18
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： HAYASHI YOSHIAKI , ATSUMI HIROMICHI , IZUMI YASUTAKA
IPC分类号： G02B26/10 , B41J2/44 , H04N1/04 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To obtain an optical scanner capable of reducing the variation of beam spot diameters, thereby reducing density unevenness, and to provide an image forming apparatus.
SOLUTION: The optical scanner has a deflection means 6 for performing deflection scanning of light fluxes from a plurality of light sources 1 and optical scanning system 7, 8 for guiding a plurality of light fluxes to which the deflection scanning is performed to different surfaces to be scanned by every light flux. The optical scanner has a coupling optical system 2, an aperture diaphragm 3 which restricts light fluxes from the coupling optical system 2 at least in the vertical scanning direction and a first optical system 4 which condenses the light fluxes emitted from the aperture diaphragm 3 at least in the vertical scanning direction between the plurality of light sources 1 and the deflection means 6 corresponding to each light source, the aperture diaphragm 3 is arranged on the side closer to the light sources 1 from a focal position on the front side in the vertical scanning direction of the first optical system 4, when focal distance of the first optical system 4 in the vertical scanning direction is considered as f1 and distance between the aperture diaphragm and a main point position on the front side of the first optical system is considered as L1, a conditional expression of f1≤L1
摘要翻译：要解决的问题：为了获得能够减小光点直径的变化从而减小浓度不均匀性的光学扫描仪，并提供一种图像形成装置。解决方案：光学扫描器具有偏转装置6，用于对来自多个光源1和光学扫描系统7,8的光束进行偏转扫描，用于将执行偏转扫描的多个光束引导到不同的光源每个光通量要扫描的表面。光学扫描器具有耦合光学系统2，孔径光阑3，其至少在垂直扫描方向上限制来自耦合光学系统2的光束;以及第一光学系统4，其将从孔径光阑3发射的光束至少凝聚在多个光源1和对应于每个光源的偏转装置6之间的垂直扫描方向上，孔径光阑3从垂直扫描的正面侧的焦点位置配置在靠近光源1的一侧第一光学系统4的方向，将第一光学系统4的垂直扫描方向的焦距设为f1，将光阑与第一光学系统的前侧的主点位置的距离设为L1 ，满足f1≤L1<2×f1的条件表达式。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2005165083A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2005165083A
公开(公告)日：2005-06-23
申请号：JP2003405571
申请日：2003-12-04
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ATSUMI HIROMICHI , HAYASHI YOSHIAKI , IZUMI YASUTAKA
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To obtain an optical scanner and an image forming apparatus in which the deterioration of such optical characteristic as subscanning beam pitch is suppressed, optical components are easily laid out and a stable beam spot diameter is available even when the focal length of a line image optical system is shortened and the opening angle between luminous fluxes is small.
SOLUTION: The optical scanner has: optical systems 2 and 6 which couple the luminous fluxes from a plurality of light sources 1 and 5; the line image optical systems 4 and 8 which focus the luminous fluxes from coupling optical systems into lines extending along a direction corresponding to a main scanning; an optical deflector 9 which deflects the luminous fluxes in the vicinity of a linear focusing part on a deflection and reflection face; a plurality of scanning optical systems 100 and 110 which focus a plurality of luminous fluxes deflected with the optical deflector as light spots on respective corresponding planes to be scanned 12. In the optical scanner, the plurality of luminous fluxes guided to different planes to be scanned and advancing to the optical deflector have an opening angle θ with each other in a deflection and rotation plane, and at least one of line image optical systems 4 and 8 is arranged to be dislocated with respect to the luminous flux in a main scanning plane.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题为了获得光学扫描器和图像形成装置，其中抑制了副扫描光束间距这样的光学特性的劣化，光学部件容易布置，并且即使当线图像光学系统的焦距缩短，光通量之间的打开角度小。解决方案：光学扫描器具有：耦合来自多个光源1和5的光通量的光学系统2和6; 将来自耦合光学系统的光束聚焦成沿着与主扫描相对应的方向延伸的线的线图像光学系统4和8; 光偏转器9，使偏转和反射面上的线性聚焦部分附近的光束偏转; 多个扫描光学系统100和110，其将与光偏转器偏转的多个光束聚焦在要扫描的相应的相应平面上的光斑12.在光学扫描器中，多个光束被引导到不同的平面以被扫描并且前进到光学偏转器在偏转和旋转平面中具有彼此的开口角θ，并且至少一个行图像光学系统4和8被布置为相对于主扫描平面中的光通量而脱位。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2007171626A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2007171626A
公开(公告)日：2007-07-05
申请号：JP2005370073
申请日：2005-12-22
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： IZUMI YASUTAKA , HAYASHI YOSHIAKI , MIYATAKE NAOKI , OSUGI TOMOYA
IPC分类号： G02B26/10 , B41J2/44 , G03G15/04 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive and simply adjustable optical scanner in which the diameter of beam spot is made small and positional shift of the beam spot is reduced.
SOLUTION: A cylindrical lens 5 being an anamorphic optical element which focuses a luminous flux from a coupling optical system at least in a subscanning direction is mounted on a housing 33 via an intermediate member 32 in the optical scanner. The cylindrical lens 5 is fixed at its one end of the longitudinal direction on the intermediate member 32 in a cantilever form, the position of the lens is adjustable in the subscanning direction (direction shown by arrow D1) and the eccentricity of the lens is adjustable around the axis (direction shown by arrow D2) which is parallel to an optical axis before the lens is fixed to the intermediate member 32. The position of the intermediate member 32 is adjustable in the optical axis direction and in a main scanning direction (direction shown by arrow D3) and the eccentricity of the intermediate member 32 is adjustable around the axis (direction shown by arrow D4) which is parallel to the subscanning direction before the intermediate member is fixed on the housing 33.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种便宜且简单可调的光学扫描器，其中束斑的直径变小并且束斑的位置偏移减小。解决方案：作为至少在副扫描方向上聚焦来自联接光学系统的光束的变形光学元件的柱面透镜5经由光学扫描器中的中间构件32安装在壳体33上。柱面透镜5以悬臂形式在中间构件32的长度方向的一端固定，透镜的位置在副扫描方向（箭头D1所示的方向）上是可调节的，透镜的偏心度可调在透镜固定到中间构件32之前绕轴线（箭头D2所示的方向）平行。中间构件32的位置可以在光轴方向和主扫描方向（方向如箭头D3所示），并且中间构件32的偏心度可在中间构件固定在壳体33上之前围绕平行于副扫描方向的轴线（箭头D4所示的方向）调节。版权所有：（C ）2007，JPO＆INPIT

7. 发明专利

JP2005173035A Optical scanner and image forming device 有权
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2005173035A
公开(公告)日：2005-06-30
申请号：JP2003410734
申请日：2003-12-09
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： IZUMI YASUTAKA , HAYASHI YOSHIAKI , ATSUMI HIROMICHI
IPC分类号： G02B26/10
摘要： PROBLEM TO BE SOLVED: To obtain an optical scanner and an image forming device in which degradation in image forming performance of luminous flux is dispersed among scanning optical systems with proper balance and the size is reduced while degradation in the image forming performance of the luminous flux is suppressed to a minimum as a device whole.
SOLUTION: In each of the plurality of scanning optical systems, an optical path bending means is arranged in the optical path between a deflector 5 and a surface to be scanned 10. Among the optical path bending means arranged in the respective scanning optical systems, the optical path bending means, which is arranged closest to the deflector 5 on the optical path, is arranged on the optical path between an image forming optical system and the surface 10 in one scanning optical system and is arranged in the optical path of the image forming optical system in the other scanning optical systems.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决的问题：为了获得光学扫描仪和图像形成装置，其中光束的成像性能的劣化分散在具有适当平衡的扫描光学系统中，并且尺寸减小，同时成像性能的降低作为整体，光通量被抑制到最小。解决方案：在多个扫描光学系统的每一个中，光路弯曲装置布置在偏转器5和待扫描表面10之间的光路中。在设置在各个扫描光学系统中的光路弯曲装置系统中，在光路上最靠近偏转器5布置的光路弯曲装置被布置在一个扫描光学系统中的图像形成光学系统和表面10之间的光路上，并且被布置在其他扫描光学系统中的成像光学系统。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2005140833A Optical scanner and image forming apparatus 有权
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2005140833A
公开(公告)日：2005-06-02
申请号：JP2003374378
申请日：2003-11-04
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： HAYASHI YOSHIAKI , ATSUMI HIROMICHI , IZUMI YASUTAKA
IPC分类号： B41J2/44 , G02B13/00 , G02B13/18 , G02B26/10 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an optical scanner capable of reducing the diameter of a beam spot while an easily machinable, thin and compact scanning lens is used.
SOLUTION: The optical scanner has: a light source 1; a coupling optical system 2 which couples a luminous flux emitted from the light source; a line picture optical system 4 which makes the luminous flux emitted from the coupling optical system into a line picture long in a main scanning direction; a deflection means 5 which deflects and scans with the luminous flux emitted from the line picture optical system; and a scanning optical system which guides the luminous flux emitted from the deflection means onto a plane to be scanned. The scanning optical system is composed of a plurality of scanning lenses 7 and 8 under the conditions that "at least a scanning lens is composed of an aspherical face of symmetry of revolution and a special toric face in which the subscanning radius of curvature varies from the optical axis of the lens face toward the periphery in the main scanning direction", and "the face among all faces of scanning lens which has a region of the largest tilt angle within an effective region for the face perpendicular to the optical axis is an aspherical face of symmetry of revolution".
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够在使用易于加工，薄且紧凑的扫描透镜的同时减小光束点的直径的光学扫描仪。解决方案：光学扫描器具有：光源1; 耦合光学系统2，其耦合从光源发射的光束; 将从耦合光学系统发出的光束成为主扫描方向长的直线图像的线条图像光学系统4; 偏转装置5，其利用从线路图像光学系统发射的光束偏转和扫描; 以及扫描光学系统，其将从偏转装置发射的光束引导到待扫描的平面上。扫描光学系统由多个扫描透镜7和8组成，条件是“至少扫描透镜由旋转对称的非球面形状和特殊的复曲面构成，其中副扫描半径从透镜的光轴朝向主扫描方向的周边面“，并且”在与光轴垂直的面的有效区域内具有最大倾斜角的区域的扫描透镜的所有面的面为非球面面对革命的对称性“。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2005092077A Optical scanner and image forming apparatus 有权
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2005092077A
公开(公告)日：2005-04-07
申请号：JP2003328314
申请日：2003-09-19
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： IZUMI YASUTAKA , HAYASHI YOSHIAKI , ATSUMI HIROMICHI
IPC分类号： G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an optical scanner and an image forming apparatus in which adverse effect to image forming performance, caused by poor surface precision of parallel flat plates, is reduced for the structure having the parallel flat plates at a light incident port and a light-emitting port of luminous fluxes to a deflection means that is commonly used by a plurality of scanning optical systems.
SOLUTION: The optical scanner is provided with a plurality of light sources 1, a deflector 5 having a deflection and reflection surface to deflect luminous fluxes from the plurality of light sources 1 and parallel flat plates 6, through which incident luminous flux to a deflector 5 and emitting luminous flux from the deflector pass. A plurality of incident luminous fluxes to the deflector 5 from the plurality of light sources 1 have mutually spreading angles within the deflection and rotating surface. Let θ1max and θ1min be the maximum value and the minimum value of average incident angles with respect to the deflection reflection surface at the deflection and rotating surface, respectively, θ2 be the half image angle corresponding to an effective writing width, α be the tilt angle of the parallel flat plates with respect to the main scanning direction within the deflection and rotating surface. Then, the optical scanner satisfies the equations: 0.6
摘要翻译：要解决的问题：提供一种光学扫描仪和图像形成装置，其中对于具有平行平板的结构在平行平板的结构中，对平行平板的差的表面精度造成对图像形成性能的不利影响降低入射端口和光通量的发光口连接到由多个扫描光学系统共同使用的偏转装置。解决方案：光学扫描器设置有多个光源1，偏转器5具有偏转和反射表面，以偏转来自多个光源1和平行平板6的光通量，入射光通量偏转器5并且从偏转器通过发射光通量。从多个光源1到偏转器5的多个入射光束在偏转和旋转表面内具有相互扩散的角度。设θ1max和θ1min分别为偏转和旋转表面处的偏转反射面的平均入射角的最大值和最小值，θ2为对应于有效写入宽度的半像角，α为倾斜角的平行平板相对于偏转和旋转表面内的主扫描方向。然后，光学扫描仪满足以下等式：0.6 <（θ1max-α）/（θ2+α）<1.4和0.6 <（θ1min-α）/（θ2+α）<1.4。版权所有（C）2005，JPO＆NCIPI

10. 发明专利

JP2006162957A Scanning lens in optical scanner, optical scanner and image forming apparatus 有权
标题翻译：光学扫描仪，光学扫描仪和图像形成设备中的扫描镜头
公开(公告)号：JP2006162957A
公开(公告)日：2006-06-22
申请号：JP2004354130
申请日：2004-12-07
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： IZUMI YASUTAKA , HAYASHI YOSHIAKI , ATSUMI HIROMICHI
IPC分类号： G02B26/10 , B41J2/44 , G02B26/12
摘要： PROBLEM TO BE SOLVED: To realize a new scanning lens in which assembly accuracy is easily improved. SOLUTION: The scanning lens, which composes the optical scanning system of an optical scanner, has a strip-like shape which is longer in a main scanning direction and shorter in a subscanning direction and has power in the subscanning direction, and three reference projections 12a, 12b and 12c for assembling and fixing are formed as a unit with the lens on the end face of the lens of the fixed side in the subscanning direction, the first reference projection 12a is located at the vicinity of the optical axis of the lens, the second and the third reference projections 12b and 12c are located in the opposite sides of each other via the first reference projection in the main scanning direction, and the distances from the first reference projection are substantially equal to each other, and the distance e in the main scanning direction between the second and the third reference projections 12b and 12c with respect to the effective width E of the lens in the main scanning direction satisfies the condition E>e (1). COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：实现组装精度容易提高的新的扫描透镜。构成光扫描器的光扫描系统的扫描透镜具有在主扫描方向上较长并且在副扫描方向上较短并具有副扫描方向的功率的条状形状，并且三用于组装和固定的参考突起12a，12b和12c以副扫描方向的固定侧的透镜的端面上的透镜形成为单元，第一参考突起12a位于透镜，第二和第三参考突起12b和12c经由主扫描方向上的第一参考突起位于彼此的相对侧，并且距离第一参考突起的距离基本上彼此相等，并且第二和第三参考突起12b和12c之间的主扫描方向上的距离e相对于主扫描方向上的透镜的有效宽度E满足假设条件E> e（1）。版权所有（C）2006，JPO＆NCIPI

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