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    • 43. 发明授权
    • Optical scanner and image formation apparatus including the optical scanner
    • 光学扫描器和包括光学扫描仪的图像形成装置
    • US07123395B2
    • 2006-10-17
    • US11001494
    • 2004-12-01
    • Masanori YoshikawaHideo HiroseMasaaki NakanoIkuko KatohKeisuke Fujimoto
    • Masanori YoshikawaHideo HiroseMasaaki NakanoIkuko KatohKeisuke Fujimoto
    • G02B26/08
    • G02B26/123B41J2/473
    • In an overfilled optical scanner in which a plurality of light beams are used, a uniform luminous-energy distribution is achieved on a scanning plane to be scanned. The optical scanner includes: a light source 3 for producing a first light beam L1 and a second light beam L2; a polygon mirror; a first image formation optical system for leading the light beams L1 and L2 to a deflecting plane of the polygon mirror and for forming, on the deflecting plane, a line image whose width is greater than the plane width of the deflecting plane; and a second image formation optical system for leading the light beams L1 and L2 from the polygon mirror to the scanning plane of a photosensitive drum and forming an image on the scanning plane. The first image formation optical system is adjusted so that the optical axes A1 and A2 of the first and second light beams L1 and L2 are approximately symmetrical about the optical axis A0 of the first image formation optical system. The powers of the first and second light beams L1 and L2 are thus balanced with each other on the scanning plane.
    • 在其中使用多个光束的过满的光学扫描仪中,在待扫描的扫描平面上实现均匀的发光能量分布。 光学扫描器包括:用于产生第一光束L 1和第二光束L 2的光源3; 多面镜 用于将光束L 1和L 2引导到多面镜的偏转平面并用于在偏转平面上形成宽度大于偏转平面的平面宽度的线图像的第一图像形成光学系统; 以及用于将光束L 1和L 2从多面镜引导到感光鼓的扫描平面并在扫描平面上形成图像的第二图像形成光学系统。 调整第一图像形成光学系统,使得第一和第二光束L 1和L 2的光轴A 1和A 2关于第一成像光学系统的光轴A 0近似对称。 因此,第一光束L 1和第二光束L 2的光焦度在扫描平面上彼此平衡。
    • 47. 发明授权
    • Optical scanning device, image reading device provided with this, image forming device, and photographing device
    • 光学扫描装置,具备该图像读取装置的图像形成装置以及拍摄装置
    • US07023597B2
    • 2006-04-04
    • US10472777
    • 2002-04-10
    • Yoshiharu YamamotoMotonobu YoshikawaDaizaburo MatsukiHajime YamamotoMasanori YoshikawaAkinobu Okuda
    • Yoshiharu YamamotoMotonobu YoshikawaDaizaburo MatsukiHajime YamamotoMasanori YoshikawaAkinobu Okuda
    • G02B26/08
    • B41J2/471G02B26/126
    • An image reading device comprising a rotary polygon mirror (6) for scanning a light flux from a light source (1), an imaging optical system (4) for forming on a reflection plane of the mirror (6) a linear image larger than the width in a main scanning direction of the one reflection plane, and a curved-face mirror (7), wherein the light source (1), the imaging optical system (4), the rotary polygon mirror (6) and the curved-face mirror (7) are disposed in different positions in a sub-scanning direction, a light flux from the imaging optical system (4) shines obliquely onto the polygon mirror (6), and a light flux reflected off the mirror (6) beams obliquely onto the curved-face mirror (7). Since one curved-face mirror can beam a light flux reflected from the rotary polygon mirror onto a surface to be scanned and the rotary polygon mirror having a small inscribed radius and many reflection planes can be used, satisfactory optical performance and high-speed feature can be realized.
    • 一种图像读取装置,包括用于扫描来自光源(1)的光束的旋转多面镜(6),用于在所述反射镜(6)的反射平面上形成大于所述光源的线性图像的成像光学系统(4) 在一个反射面的主扫描方向上的宽度和曲面镜(7),其中,光源(1),成像光学系统(4),旋转多面镜(6)和曲面 反射镜(7)沿副扫描方向设置在不同的位置,来自成像光学系统(4)的光束倾斜地照射到多面镜(6)上,并且从镜子(6)反射的光束倾斜地射出 到曲面镜(7)上。 由于一个曲面镜可以将从旋转多面镜反射的光束照射到待扫描的表面上,并且可以使用具有小的内切半径和许多反射面的旋转多面镜,令人满意的光学性能和高速特征 实现。
    • 48. 发明授权
    • Optical scanning device and color image forming apparatus
    • 光学扫描装置和彩色图像形成装置
    • US07012723B2
    • 2006-03-14
    • US10537420
    • 2003-12-08
    • Masanori YoshikawaHideo HiroseMotonobu YoshikawaYoshiharu Yamamoto
    • Masanori YoshikawaHideo HiroseMotonobu YoshikawaYoshiharu Yamamoto
    • G02B26/08
    • G02B26/126G02B26/123G06K15/1261H04N1/1135H04N1/1215
    • By a first image forming optical system (42a to 42d), a plurality of light beams from light sources (41a to 41d) form linear images on a common deflecting surface (46) of an optical deflector (44). Light beams reflected off the optical deflector (44) are reflected by a plurality of curved surface mirrors (45a to 45d) and are allowed to scan over photosensitive members (4a to 4d), respectively. The plurality of curved surface mirrors (45a to 45d) are disposed on the same side with respect to a plane that includes a normal line at a center of the deflecting surface (46) and is parallel to a main scanning direction. Further, curved surfaces of the plurality of curved surface mirrors (45a to 45d) vary in shape. Thus, a tandem type color image forming apparatus that achieves low cost and has excellent optical performance and an optical scanning device that is used favorably in the color image forming apparatus can be provided.
    • 通过第一图像形成光学系统(42a至42d),来自光源(41a至41d)的多个光束在光学偏转器(44)的共同偏转表面(46)上形成线性图像。 从光偏转器(44)反射的光束被多个弯曲表面反射镜(45a〜45d)反射,并分别在光敏部件(4a〜4d)上扫描。 多个弯曲表面镜45a至45d相对于包括偏转表面46的中心处的法线的平面设置在与主扫描方向平行的同一侧。 此外,多个曲面镜(45a〜45d)的曲面形状变化。 因此,可以提供一种在彩色图像形成装置中有利地实现低成本且具有优异的光学性能的串联型彩色图像形成装置和光学扫描装置。
    • 50. 发明申请
    • Optical scanner and image formation apparatus including the optical scanner
    • 光学扫描器和包括光学扫描仪的图像形成装置
    • US20050116155A1
    • 2005-06-02
    • US11001494
    • 2004-12-01
    • Masanori YoshikawaHideo HiroseMasaaki NakanoIkuko KatohKeisuke Fujimoto
    • Masanori YoshikawaHideo HiroseMasaaki NakanoIkuko KatohKeisuke Fujimoto
    • B41J2/44G02B7/00G02B7/02G02B7/198G02B26/10G02B26/12H04N1/036H04N1/113H01J3/14H01J5/16
    • G02B26/123B41J2/473
    • In an overfilled optical scanner in which a plurality of light beams are used, a uniform luminous-energy distribution is achieved on a scanning plane to be scanned. The optical scanner includes: a light source 3 for producing a first light beam L1 and a second light beam L2; a polygon mirror; a first image formation optical system for leading the light beams L1 and L2 to a deflecting plane of the polygon mirror and for forming, on the deflecting plane, a line image whose width is greater than the plane width of the deflecting plane; and a second image formation optical system for leading the light beams L1 and L2 from the polygon mirror to the scanning plane of a photosensitive drum and forming an image on the scanning plane. The first image formation optical system is adjusted so that the optical axes A1 and A2 of the first and second light beams L1 and L2 are approximately symmetrical about the optical axis A0 of the first image formation optical system. The powers of the first and second light beams L1 and L2 are thus balanced with each other on the scanning plane.
    • 在其中使用多个光束的过满的光学扫描仪中,在待扫描的扫描平面上实现均匀的发光能量分布。 光学扫描器包括:用于产生第一光束L 1和第二光束L 2的光源3; 多面镜 用于将光束L 1和L 2引导到多面镜的偏转平面并用于在偏转平面上形成宽度大于偏转平面的平面宽度的线图像的第一图像形成光学系统; 以及用于将光束L 1和L 2从多面镜引导到感光鼓的扫描平面并在扫描平面上形成图像的第二图像形成光学系统。 调整第一图像形成光学系统,使得第一和第二光束L 1和L 2的光轴A 1和A 2关于第一成像光学系统的光轴A 0近似对称。 因此,第一光束L 1和第二光束L 2的光焦度在扫描平面上彼此平衡。