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    • 2. 发明申请
    • ILLUMINATION DEVICE
    • 照明装置
    • US20130314756A1
    • 2013-11-28
    • US13982636
    • 2011-12-28
    • Fumimasa AmemiyaToru OchiaiFumihide SakamotoJunya OzawaSatoshi TanakaYuichi KagamiHiroyuki HirokawaShinnosuke EnomotoKoji Ogino
    • Fumimasa AmemiyaToru OchiaiFumihide SakamotoJunya OzawaSatoshi TanakaYuichi KagamiHiroyuki HirokawaShinnosuke EnomotoKoji Ogino
    • F21V13/04
    • F21V13/04G02B6/0045H04N1/02835H04N1/0289H04N1/1017
    • To provide an illumination device in which there is no variation in light intensity distribution of the illumination device, and in which illumination spots, particularly light intensity spots, are not prone to occur in a read image in an image reading device, by maintaining a constant gap between a light source and an end face of a light guide. The illumination device includes: a light guide having an end face for taking in light, a diffuse reflecting surface for diffusely reflecting the light taken in from the end face, and a light exit surface for emitting the light that is diffusely reflected at the diffuse reflecting surface towards an irradiation surface. The illumination device further include a reflector having a diffuse reflecting surface that reflects light from the light source toward the one end face of the light guide. The light guide has, at the one end, a flange portion that abuts the reflector, the light source is mounted to a circuit board, and the reflector is held between the flange portion of the light guide and circuit board so as to maintain a predetermined gap between the light source and light guide.
    • 为了提供一种照明装置,其中照明装置的光强度分布没有变化,并且其中在图像读取装置中的读取图像中不容易发生照明点,特别是光强度点,通过保持恒定 光源与光导的端面之间的间隙。 照明装置包括:具有用于吸收光的端面的光导,用于漫反射从端面吸收的光的漫反射面,以及用于发射在漫反射处漫反射的光的光出射面 表面朝向照射表面。 照明装置还包括具有将来自光源的光朝向光导的一个端面反射的漫反射面的反射体。 导光体的一端具有与反射体抵接的凸缘部,光源安装在电路基板上,反射体保持在导光板的凸缘部与电路基板之间, 光源与光导之间的间隙。
    • 9. 发明授权
    • Image reading apparatus
    • 图像读取装置
    • US5394205A
    • 1995-02-28
    • US222724
    • 1994-03-30
    • Toru OchiaiMasahiro MochizukiSoichi IkedaKatsuhiro Sato
    • Toru OchiaiMasahiro MochizukiSoichi IkedaKatsuhiro Sato
    • G02B7/36G03B21/53H04N1/03G03B3/10
    • H04N1/02409G02B7/36G03B21/53H04N1/03
    • An apparatus comprises an image sensing optical system including an image pickup element for converting an image to an electrical signal and a projection lens for projecting an image onto a photo-sensing plane of the image pickup element. The image sensing optical system is driven along an optical axis thereof while maintaining a relative positional relationship between the projection lens and the image pickup element to adjust the focal position. An apparatus may also comprise an image sensing optical system including an image pickup element for scanning an image to convert it to an electrical signal and a projection lens for projecting an image onto a photo-sensing plane of the image pickup element, a focus adjusting device for adjusting a focal position of the image sensing optical system and a detector for detecting an in-focus position of the image sensing optical system to the object. The focus adjusting device is controlled in accordance with the output of the detector so that the object is always within a depth of focus of the image sensing optical system.
    • 一种装置包括图像感测光学系统,其包括用于将图像转换为电信号的图像拾取元件和用于将图像投影到图像拾取元件的感光平面上的投影透镜。 摄像光学系统沿其光轴被驱动,同时保持投影透镜和图像拾取元件之间的相对位置关系以调节焦点位置。 装置还可以包括图像感测光学系统,其包括用于扫描图像以将其转换为电信号的图像拾取元件和用于将图像投影到图像拾取元件的感光平面上的投影透镜;焦点调节装置 用于调整图像感测光学系统的焦点位置和用于检测图像感测光学系统对焦的对焦位置的检测器。 根据检测器的输出来控制焦点调节装置,使得对象总是在图像感测光学系统的焦深范围内。