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    • 12. 发明授权
    • Optical scanning device and image forming apparatus using the same
    • 光学扫描装置及使用其的成像装置
    • US08179561B2
    • 2012-05-15
    • US11965200
    • 2007-12-27
    • Jun Igarashi
    • Jun Igarashi
    • H04N1/00
    • G02B26/124G02B3/02G02B27/0031
    • An optical scanning device includes an input optical system having an input optical element, for projecting a light beam from a light source device onto a deflecting surface of an optical deflector, and an imaging optical system having an imaging optical element, for imaging the light beam scanningly deflected by the deflecting surface of the optical deflector, on a surface to be scanned, wherein the light beam is obliquely incident on the deflecting surface in a sub-scan section, wherein the imaging optical element has at least one optical surface which is decentered in the sub-scan section, wherein the input optical element has at least one optical surface having an asymmetric and aspherical surface shape, wherein the input optical element has a thickness dm1 in the sub-scan section and at a position where a first marginal light ray of the light beam passing through the input optical system, which first marginal light ray is closer to an optical reference axis than the principal ray of that light beam is, passes, as well as a thickness dm2 at a position where a second marginal light ray further remote from the optical reference axis than the principal light ray of the light beam is, passes, and wherein dm1
    • 光学扫描装置包括具有输入光学元件的输入光学系统,用于将来自光源装置的光束投射到光学偏转器的偏转表面上,以及具有成像光学元件的成像光学系统,用于对光束进行成像 由所述光学偏转器的偏转表面扫描地偏转在待扫描的表面上,其中所述光束在副扫描部分中倾斜地入射在所述偏转表面上,其中所述成像光学元件具有至少一个偏心的光学表面 在副扫描部分中,其中输入光学元件具有至少一个具有不对称和非球面表面形状的光学表面,其中输入光学元件在副扫描部分中具有厚度dm1,在第一边缘光 通过输入光学系统的光束的射线,该第一边缘光线比主光线更靠近光学参考轴 的光束通过,并且在远离光学参考轴的第二边缘光线比光束的主光线穿过的位置处的厚度dm2,并且其中dm1
    • 13. 发明申请
    • OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME
    • 光学扫描装置和使用其的图像形成装置
    • US20090202273A1
    • 2009-08-13
    • US12370376
    • 2009-02-12
    • Jun Igarashi
    • Jun Igarashi
    • G03G15/22G02B26/08
    • G03G15/326G02B26/123G02B26/125G02B27/0018G03G15/0435G03G2215/0404
    • An optical scanning device includes two scanning units each having an input optical system for making, in a sub-scan section, a light beam from a light source be incident at a finite angle on a deflecting surface of a deflector, and an imaging optical system for imaging, on a scan surface, the light beam scanningly deflected by the deflecting surface, the two scanning units being disposed opposed to each other with the deflecting means intervening therebetween, wherein one scanning unit has a first imaging optical element and a second imaging optical element while the other scanning unit has a third imaging optical element and a fourth imaging optical element, wherein the one scanning unit includes a light blocking member for intercepting unwanted light reflected at an optical surface of the fourth imaging optical element, wherein the third imaging optical element is provided at a light path between the fourth imaging optical element and the first light blocking member, and wherein the third imaging optical element has a positive refracting power in the sub-scan section through which unwanted light reflected at the optical surface of the fourth imaging optical element passes.
    • 光学扫描装置包括两个扫描单元,每个扫描单元具有一个输入光学系统,用于在副扫描区中使来自光源的光束以有限角度入射在偏转器的偏转表面上,并且成像光学系统 用于在扫描表面上成像由所述偏转表面扫描地偏转的光束,所述两个扫描单元彼此相对设置,所述偏转装置插入在所述偏转装置中,其中一个扫描单元具有第一成像光学元件和第二成像光学元件 元件,而另一个扫描单元具有第三成像光学元件和第四成像光学元件,其中所述一个扫描单元包括遮光部件,用于截取在第四成像光学元件的光学表面反射的不需要的光,其中第三成像光学元件 元件设置在第四成像光学元件和第一遮光构件之间的光路上,并且其中 第三成像光学元件在副扫描部分中具有正折射力,通过该正扫描部分在第四成像光学元件的光学表面反射的不需要的光通过。
    • 20. 发明授权
    • Optical scanning apparatus for blocking undesirable-light generated in opposing scanning units to form a high quality image
    • 用于阻挡在相对的扫描单元中产生的不期望的光以形成高质量图像的光学扫描装置
    • US08207997B2
    • 2012-06-26
    • US12436705
    • 2009-05-06
    • Jun Igarashi
    • Jun Igarashi
    • B41J15/14B41J2/435B41J27/00G02B26/08G02B26/10G02B26/12
    • G02B27/0018G02B26/123
    • An optical scanning apparatus effectively blocks undesirable-light generated in opposed scanning units, and forms high-quality image with simple configuration. The apparatus includes two scanning units disposed with a polygon mirror therebetween, each scanning unit including: an incident optical system guiding a beam from a light source to the polygon mirror; and an imaging optical system including an imaging optical element to cause the deflected beam form an image on a scanning surface. One of the scanning units includes a member to block an undesirable light reflected on optical surfaces of the imaging optical element of the other scanning unit and traveling toward the scanning surface of said one scanning unit. rp
    • 光学扫描装置有效地阻止在相对扫描单元中产生的不期望的光,并且以简单的配置形成高质量的图像。 该装置包括两个设置有多面镜的扫描单元,每个扫描单元包括:入射光学系统,将来自光源的光束引导到多面镜; 以及成像光学系统,其包括成像光学元件,以使偏转的光束在扫描表面上形成图像。 其中一个扫描单元包括阻挡在另一个扫描单元的成像光学元件的光学表面上反射的不期望的光并朝向所述一个扫描单元的扫描表面移动的构件。 rp