公开(公告)号：EP1921481A2

公开(公告)日：2008-05-14

申请号：EP07117331.4

申请日：2007-09-27

申请人： Samsung Electronics Co., Ltd.

发明人： Kim, Hyung-soo

IPC分类号： G02B13/00 ,  G02B26/12 ,  G02B27/00 ,  H04N1/04

CPC分类号： G02B26/125 ,  G02B13/0005 ,  G02B27/0031 ,  H04N1/1135 ,  H04N2201/0082

摘要： A light scanning unit (140) includes: a light source (11) generating and irradiating at least one beam corresponding to an image signal; a beam deflector (20) deflecting and scanning the beam irradiated by the light source (11); and an f-θ lens (30) forming an image from the beam deflected by the beam deflector (20) onto a surface to be scanned, the f-θ lens (30) being provided as one lens and satisfies the following equation (2): - 0.2 SAG ⁢ 1 + SAG ⁢ 2 d 2 0.2
where SAG 1 is Z value of an incident surface of the f-θ lens (30), which faces the beam deflector (20), SAG 2 is Z value of the exit surface of the f-θ lens (30), which faces the surface to be scanned, based on an XYZ coordinate system in which a main scanning plane is a Y-Z plane and a subscanning plane is an X-Z plane, and d 2 is a center thickness of the f-θ lens (30).

摘要翻译： 光扫描单元（140）包括：产生并照射与图像信号对应的至少一个光束的光源（11）; 偏转和扫描由光源（11）照射的光束的光束偏转器（20）; 和由所述光束偏转器（20）偏转的光束形成到要扫描的表面上的图像的f-R透镜（30），所述f-R透镜（30）被设置为一个透镜，并且满足以下等式（2 ）： - 0.2

公开(公告)号：EP1795942A1

公开(公告)日：2007-06-13

申请号：EP06025108.9

申请日：2006-12-05

申请人： CANON KABUSHIKI KAISHA

发明人： Garashi, Jun

IPC分类号： G02B26/12 ,  G02B13/00 ,  G02B9/02

CPC分类号： G02B26/125 ,  G02B13/0005

摘要： Disclosed is an optical scanning system and an image forming apparatus having the same, wherein, in one preferred form of the invention, the optical scanning system includes a light source device, a deflecting device for scanningly deflecting a light beam from the light source device, and an imaging optical system for imaging, upon a scan surface to be scanned, the light beam deflected by the deflecting device, wherein the imaging optical system consists of a single imaging optical element with a light exit surface having a concave shape with respect to a main-scan sectional plane, and wherein relations 0.5 ≤ ϕm / ϕp ≤ 0.9 0 dp / kp ≤ 0.09
are satisfied where ϕp is a power of the imaging optical element at an optical axis with respect to the main-scan direction, ϕm is a power of the imaging optical element at an outermost abaxial portion with respect to the main-scan direction, dp is a thickness of the imaging optical element at the optical axis, and kp is a k-θ coefficient of the imaging optical element at the optical axis.

摘要翻译： 本发明公开了一种光学扫描系统和具有该光学扫描系统的图像形成装置，其中，在本发明的一个优选形式中，光学扫描系统包括光源装置，用于扫描地偏转来自光源装置的光束的偏转装置， 以及成像光学系统，用于在待扫描的扫描表面上对由所述偏转装置偏转的光束进行成像，其中所述成像光学系统由具有相对于所述偏转装置的凹形形状的光出射表面的单个成像光学元件组成 主扫描截面，其中Õp是相对于主扫描方向在光轴处的成像光学元件的功率，Õp是关于0.5‰Õm/Õp‰0.9 0

公开(公告)号：EP0911665B1

公开(公告)日：2005-10-12

申请号：EP98120117.1

申请日：1998-10-23

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Nishihata, Sumihiro ,  Ishikawa, Hiromi

IPC分类号： G02B13/00 ,  G02B26/12 ,  G02B27/00

CPC分类号： G02B13/0005

公开(公告)号：EP0911665A3

公开(公告)日：2003-10-01

申请号：EP98120117.1

申请日：1998-10-23

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Nishihata, Sumihiro ,  Ishikawa, Hiromi

IPC分类号： G02B13/00 ,  G02B26/12 ,  G02B27/00

CPC分类号： G02B13/0005

摘要： In a light beam scanning system, a beam shaper shapes light beam emitted from a light source. The shaped light beam is deflected by a deflector to scan a surface in a main scanning direction. A scanning/imaging optical system causes the light beam deflected by the deflector to form an image on the surface and scan the same. The beam shaper includes a diverging optical system which converts the light beam into divergent light. The scanning/imaging optical system consists of first and second lens elements arranged in this order from the light source side and having first to fourth surfaces as numbered from the light source side and satisfies formulae, -1.42 0, fGR2>0 wherein f all , f GF , r 1GR , r 2GR , r 4GR , f GR1 and f GR2 respectively represent the composite focal length of the beam shaper and the scanning/imaging optical system, the focal length of the beam shaper, the radius of curvature of the first surface of the scanning/imaging optical system, the radius of curvature of the second surface of the scanning/imaging optical system, the radius of curvature of the fourth surface of the scanning/imaging optical system, the focal length of the first lens element and the focal length of the second lens element.

公开(公告)号：EP1130438A2

公开(公告)日：2001-09-05

申请号：EP01113735.3

申请日：1995-09-05

申请人： CANON KABUSHIKI KAISHA

发明人： Kato, Manabu

IPC分类号： G02B13/00 ,  G02B26/12

CPC分类号： G02B13/0005 ,  G02B26/125

摘要： An optical scanning apparatus has a light source, a first optical system for converting luminous flux emitted from the light source to converged luminous flux, a deflector for deflecting the converged luminous flux emitted from the first optical system, and a second optical system for forming an image in a spot shape on the plane to be scanned from luminous flux deflected by the deflector. The second optical system comprises a single lens, which has aspherical surfaces in the main scanning plane on both sides. Parameters R 1 , R 2 , Y max , S 1 , S 2 , and d of the single lens satisfy the following expressions, with R 1 denoting the paraxial curvature radius of the lens surface facing the deflector in the single lens, R 2 denoting the paraxial curvature radius of the lens surface facing the plane to be scanned in the single lens, Y max denoting the maximum effective diameter on the main scanning plane of the single lens, S 1 denoting an aspherical-surface amount from the paraxial lens surface of the lens surface facing the deflector at the maximum effective diameter Y max. S 2 denoting an aspherical-surface amount from the paraxial lens surface of the lens surface facing the plane to be scanned at the maximum effective diameter Y max , and d denoting the center thickness of the single lens:
0 1 2
(R 1 2 - Y max 2 ) 1/2 - R 1 1
(R 2 2 - Y max 2 ) 1/2 - R 2 - d 2 2 2 - Y max 2 ) 1/2 - R 2 ,
wherein said single lens has toric, aspherical lens surfaces on both sides.

摘要翻译： 一种光学扫描装置，具有光源，用于将从光源到会聚光通量，用于偏转来自所述第一光学系统发射的收敛光束的偏转器，以及用于在形成第二光学系统射出的光束的第一光学系统 在平面上的光点形状的图像，以从由所述偏转器偏转的光束进行扫描。 第二光学系统包括单个透镜，其具有在上bothsides主扫描平面非球面。 参数R1，R2，Y max时，S1，S2，和单透镜的d满足以下表达式，其中R1表示朝向在单透镜的偏转器的透镜表面的近轴曲率半径，R2表示透镜的近轴曲率半径 表面面向所述平面，以在所述单个透镜进行扫描，YMAX表示最大有效直径上的单个透镜的主扫描平面中，S1表示到非球面表面的量从在最大朝向偏转器的透镜表面的近轴透镜表面 有效直径Y轴最大值。 S2表示到非球面表面量从透镜表面的近轴透镜面在最大有效直径Y轴最大值将被扫描的平面上，以及d表示所述单个透镜的中心厚度：0 - YMAX <2>）<1/2> - R1 - YMAX <2>）<1/2> - R2 - ð - YMAX <2> ）<1/2> - R2，worin说singlelensreflex对bothsides复曲面的，非球面透镜表面。

公开(公告)号：EP0816890A3

公开(公告)日：1998-01-14

申请号：EP97115262.4

申请日：1994-02-25

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Noguchi, Masaru, c/o Fuji Photo Film Co. Ltd. ,  Shimada, Katsumi c/o Fuji Photo Film Co., Ltd

IPC分类号： G02B13/00

CPC分类号： G02B13/0005

摘要： An fθ lens includes first and second lens groups arranged in this order from the entrance pupil side. The first lens group consists of a first lens having a negative or positive refracting power. The second lens group consists of a second lens having a positive refracting power and a third lens having a negative refracting power with the second and third lenses being cemented together. The second lens group has a positive refracting power as a whole. The following formulae (1) to (4) are satisfied. (1) 12≦ν d2 -ν d3 (2) -0.035≦Σ(φ i /ν di )≦0.005 (3) 0.7≦φ 23 ≦2.0 (4) 0.03≦d 12 ≦0.20 wherein φ i represents the power of i-th lens as numbered from the entrance pupil side standardized on the basis of the power of the whole system, φ 23 represents the power of the second lens group standardized on the basis of the power of the whole system, ν di represents the Abbe's number for the sodium d-line of i-th lens as numbered from the entrance pupil side and d 12 represents the surface separation between the first and second lens groups standardized on the basis of the focal length of the whole system.

公开(公告)号：EP0658787A3

公开(公告)日：1997-04-09

申请号：EP94116399.0

申请日：1994-10-18

申请人： FUJI XEROX CO., LTD.

发明人： Ota, Akira, Iwatsuki Works

IPC分类号： G02B13/00 ,  G02B26/10

CPC分类号： G02B13/0005

摘要： An optical scanner including a semiconductor laser device, aperture, collimator, cylindrical lens, polygonal mirror and one fϑ lens element molded from plastics. The first surface of the fϑ lens in a deflecting plane (or the plane formed by the principal rays of light as deflected by the polygonal mirror) is aspheric whereas the second lens surface is toric. When taken in the deflecting plane, the first lens surface has a positive value of the near-axis radius of curvature and, hence, it is convex toward the polygonal mirror. Taken in a plane crossing the deflecting plane at right angles, the first lens surface forms an arc of a circle having a negative value of the radius of curvature and, hence, it is concave toward the polygonal mirror. When taken in the deflecting plane, the second lens surface forms an arc of a circle having a negative value of the radius of curvature and, hence, it is convex toward the scanning surface.

公开(公告)号：EP0702256A1

公开(公告)日：1996-03-20

申请号：EP95113910.4

申请日：1995-09-05

申请人： CANON KABUSHIKI KAISHA

发明人： Manabu, Kato, c/o Canon Kabushiki Kaisha

IPC分类号： G02B13/00

CPC分类号： G02B13/0005 ,  G02B26/125

摘要： An optical scanning apparatus has a light source, a first optical system for converting luminous flux emitted from the light source to converged luminous flux, a deflector for deflecting the converged luminous flux emitted from the first optical system, and a second optical system (f θ lens) for forming an image in a spot shape on the plane to be scanned from luminous flux deflected by the deflector. The second optical system comprises a single lens, which has aspherical surfaces in the main scanning plane on both sides. Parameters R₁, R₂, Y max , S₁, S₂, and d of the single lens satisfy the following expressions, with R₁ denoting the paraxial curvature radius of the lens surface facing the deflector in the single lens, R₂ denoting the paraxial curvature radius of the lens surface facing the plane to be scanned in the single lens, Y max denoting the maximum effective diameter on the main scanning plane of the single lens, S₁ denoting an aspherical-surface amount from the paraxial lens surface of the lens surface facing the deflector at the maximum effective diameter Y max, S₂ denoting an aspherical-surface amount from the paraxial lens surface of the lens surface facing the plane to be scanned at the maximum effective diameter Y max , and d denoting the center thickness of the single lens: 0 1 2 (R 1   2 - Y max   2 ) 1/2 - R 1 1 (R 2   2 - Y max   2 ) 1/2 - R 2 - d 2 2   2 - Y max   2 ) 1/2 - R 2 .

摘要翻译： 一种光学扫描装置，具有光源，用于将从光源到会聚光通量，用于偏转来自所述第一光学系统发射的收敛光束的偏转器，和第二光学系统（F＆θ驱动发射的光通量的第一光学系统; 透镜），用于在飞机上的光点形状形成图像到从由所述偏转器偏转的光束进行扫描。 第二光学系统包括单个透镜，其具有在上bothsides主扫描平面非球面。 参数R1，R2，Y max时，S1，S2，和单透镜的d满足以下表达式，其中R1表示朝向在单透镜的偏转器的透镜表面的近轴曲率半径，R2表示透镜的近轴曲率半径 表面面向所述平面，以在所述单个透镜进行扫描，YMAX表示最大有效直径上的单个透镜的主扫描平面中，S1表示到非球面表面的量从在最大朝向偏转器的透镜表面的近轴透镜表面 有效直径Y轴最大值，S2表示到非球面表面量从透镜表面的近轴透镜面在最大有效直径Y轴最大值将被扫描的平面上，以及d表示所述单个透镜的中心厚度：$\mathop{\mathrm{image}}$

公开(公告)号：EP0660150A2

公开(公告)日：1995-06-28

申请号：EP94116182.0

申请日：1994-10-13

申请人： FUJI XEROX CO., LTD.

发明人： Anzai, Susumu, Iwatsuki Works

IPC分类号： G02B7/02 ,  G02B13/00

CPC分类号： G02B7/025 ,  G02B13/0005

摘要： The invention concerns a lens mounting structure which can reduce a displacement of the lens in the direction of mounting caused by the shrinkage of adhesive is reduced to enhance the lens mounting accuracy and to assure predetermined optical characteristics. The lens mounting structure in which an fϑ lens (20) is supported by and adhered to a lens mount (22), includes support columns (30, 32), at the upper surface (30A) of which a protrusion (30B) is formed. The protrusion (30B) has a reference support point (30C) for supporting the fϑ lens (20) on the mount (22). The fϑ lens (20) comes into contact with this reference support point (30C), and a surface of the protrusion (30B), the upper surface (30A) of the support column (30) and a periphery of the fϑ lens (20) surrounding a portion in which the fϑ lens (20) comes into contact with the reference support point (30C), are adhered so as to mount the fϑ lens (20).

公开(公告)号：EP0613035A3

公开(公告)日：1995-02-01

申请号：EP94102915.9

申请日：1994-02-25

申请人： Fuji Photo Film Co., Ltd.

发明人： Shimada, Katsumi, c/o Fuji Photo Film Co. Ltd. ,  Tsujita, Kazuhiro, c/o Fuji Photo Film Co. Ltd. ,  Noguchi, Masaru, c/o Fuji Photo Film Co. Ltd.

IPC分类号： G02B13/00

CPC分类号： G02B13/0005

摘要： An f-theta lens includes three lenses in two groups. The first lens group from the entrance pupil side consists of a first lens having a negative or positive refracting power. The second lens group consists of a second lens having a positive refracting power and a third lens having a negative refracting power with the second and third lenses being cemented together. The second lens group has a positive refracting power as a whole. The following formulae (1) to (4) are satisfied. (1) 12≦ν d2 -ν d3 (2) -0.035≦Σ(φ i /ν di )≦0.005 (3) 0.7≦φ 23 ≦2.0 (4) 0.03≦d 12 ≦0.20 wherein φ i represents the power of i-th lens as numbered from the entrance pupil side standardized on the basis of the power of the whole system, φ 23 represents the power of the second lens group standardized on the basis of the power of the whole system, ν di represents the Abbe's number for the sodium d-line of i-th lens as numbered from the entrance pupil side and d 12 represents the surface separation between the first and second lens groups standardized on the basis of the focal length of the whole system. The lens is designed to correct the color aberration, over a wide wavelength range with high accuracy. Use: scanning optical system for color image recording.