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    • 26. 发明授权
    • X-ray tube device
    • X射线管装置
    • US4777642A
    • 1988-10-11
    • US886674
    • 1986-07-18
    • Katsuhiro Ono
    • Katsuhiro Ono
    • H01J35/04H01J35/06H01J35/14
    • H01J35/14H01J35/04H01J35/06
    • An X-ray tube has a cathode assembly for emitting an electron beam and an anode target facing this assembly in an evacuated envelope. The anode target defines a target surface that is slightly inclined to the electron beam axis and the direction in which it is inclined coincides with an X-ray irradiation direction. The cathode assembly comprises a flat cathode with a flat electron emission surface and a focussing electrode which focuses electrons emitted by the cathode. The cathode's electron emission surface is elongated and its long axis is coincident with the direction of X-ray irradiation. The focussing electrode possesses an axially symmetric opening with generally the same dimensions lengthways and crosswise. This gives an X-ray tube device in which the shape of the X-ray focal spot seen looking from the X-ray irradiation direction is substantially that of a circle or of a polygon, including a square, and it is possible to vary the size of the X-ray focal spot over a wide range while maintaining its long to short side ratio at 1.4 or less.
    • X射线管具有用于在真空的外壳中发射电子束的阴极组件和面向该组件的阳极靶。 阳极靶限定了与电子束轴稍微倾斜并且其倾斜方向与X射线照射方向一致的目标表面。 阴极组件包括具有平坦电子发射表面的平坦阴极和聚焦由阴极发射的电子的聚焦电极。 阴极的电子发射表面是细长的,其长轴与X射线照射的方向一致。 聚焦电极具有轴向对称的开口,其纵向和横向具有大致相同的尺寸。 这产生了X射线管装置,其中从X射线照射方向观察到的X射线焦点的形状基本上是圆形或包括正方形的多边形,并且可以改变 在宽范围内的X射线焦斑的尺寸,同时保持其长至短边比在1.4或更小。
    • 27. 发明授权
    • X-ray tube apparatus
    • X射线管装置
    • US4730353A
    • 1988-03-08
    • US031207
    • 1987-03-30
    • Katsuhiro OnoTatsuya SakumaHiroshi Takahashi
    • Katsuhiro OnoTatsuya SakumaHiroshi Takahashi
    • H01J35/04H01J35/06H01J35/14H01J35/30H01J35/00
    • H01J35/06H01J35/14H01J35/30
    • An X-ray tube apparatus comprises an X-ray tube which includes a vacuum envelope and an anode target and a cathode assembly which are disposed within the vacuum envelope opposing each other. The cathode block has a flat-plate like filament for generating an electron beam, and a beam shaping electrode insulated from this filament. The beam shaping electrode is formed with a beam limiting aperture for passing therethrough of a part of the electron beam emitted from the filament, and a focussing dimple so as to focus the electron beam. When d2 and d3 are assumed to represent the depth of the focussing dimple and the distance between the target surface and the top surface of the focussing dimple opposing this target surface, respectively, the value of the ratio of d3 to d2 satisfies the inequality 1.0.ltoreq.d3/d2.ltoreq.4.0.
    • X射线管装置包括X射线管,其包括真空外壳和阳极靶以及设置在彼此相对的真空封壳内的阴极组件。 阴极块具有用于产生电子束的平板状灯丝和与该灯丝绝缘的光束整形电极。 光束整形电极形成有用于从灯丝发射的电子束的一部分通过的光束限制孔,以及聚焦电子束的聚焦凹坑。 假设d2和d3分别表示聚焦凹坑的深度以及与该目标表面相对的聚焦凹坑的目标表面与顶表面之间的距离,则d3与d2之比的值满足不等式1.0 < /=d3/d2
    • 30. 发明授权
    • Correcting magnification of a scanned original by adjusting a writing clock signal
    • 通过调整写入时钟信号来校正扫描原稿的放大倍率
    • US08749838B2
    • 2014-06-10
    • US13838191
    • 2013-03-15
    • Katsuhiro Ono
    • Katsuhiro Ono
    • G06K15/02
    • G03G15/041G03G15/235
    • An image forming apparatus includes a writing unit including an image data generation unit that produces image data; a main-sub image magnification processing unit that performs image magnification processing in a main-scanning direction and a sub-scanning direction; a clock generation unit that changes a writing clock period; a correction map that retains image magnification information corresponding to a deformation of a recording medium caused by application of heat and pressure from a fixing unit; and a light-emitting device that irradiates the photosensitive element with light. The writing unit slightly changes the writing clock period so as to enlarge or shrink a formed pixel in the main-scanning direction and perform enlargement or shrinkage in the sub-scanning direction, and thus cancel an image deformation caused by the deformation of the recording medium and correct a change in an image magnification in the main-scanning direction.
    • 图像形成装置包括:写入单元,包括产生图像数据的图像数据生成单元; 主副图像倍率处理单元,其在主扫描方向和副扫描方向上进行图像放大处理; 时钟生成单元,其改变写入时钟周期; 校正图,其保持与来自定影单元的加热和压力引起的记录介质的变形相对应的图像放大信息; 以及用光照射感光元件的发光装置。 写入单元略微改变写入时钟周期,以便在主扫描方向上放大或缩小形成的像素,并且在副扫描方向上进行放大或缩小,从而消除由记录介质的变形引起的图像变形 并且校正主扫描方向上的图像放大率的变化。