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    • 3. 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。
    • 6. 发明申请
    • IMAGE READING APPARATUS
    • 图像阅读器
    • US20130010338A1
    • 2013-01-10
    • US13638335
    • 2011-03-24
    • Satoshi TanakaYoshihiko MinagawaHideaki InoueJunya OzawaYoshihiro HanagataHotaka Ishimaru
    • Satoshi TanakaYoshihiko MinagawaHideaki InoueJunya OzawaYoshihiro HanagataHotaka Ishimaru
    • H04N1/04
    • H04N1/00795H04N1/00806H04N1/02845H04N1/0285H04N1/0303H04N1/0305H04N1/1017H04N1/193H04N1/401H04N1/48H04N2201/044
    • In the present invention, to provide an image reading apparatus capable to read images of document images having different gloss levels with a reproducibility suitable for uses, a data processing means is provided to irradiate a document image with light from a regular reflection light source and a diffuse reflection light source, and to generate image data based on a regular reflection output value and a diffuse reflection output value obtained from a photoelectric converting means, this data processing means obtaining gloss pixel data by comparing, based on the regular reflection correction value for shading correction of a regular reflection output value, a diffuse correction output value for shading correction of the diffuse reflection output value, and a determining threshold for determining whether or not the regular reflection output value is a gloss pixel, the corrected output value corrected by the regular reflection correction value with the determining threshold, and obtaining a non-gloss pixel data from a corrected output value corrected by the diffuse correction value.
    • 在本发明中,为了提供能够以适合使用的再现性来读取具有不同光泽度的文件图像的图像的图像读取装置,提供数据处理装置,用来对来自正反射光源和 漫反射光源,并且基于从光电转换装置获得的常规反射输出值和漫反射输出值产生图像数据,该数据处理装置通过基于阴影的常规反射校正值进行比较来获得光泽像素数据 正反射输出值的校正,漫反射输出值的阴影校正的漫反射校正输出值以及用于确定正反射输出值是否为光泽像素的确定阈值,校正后的输出值由正常反射输出值校正 具有确定阈值的反射校正值,并获得 从由漫射校正值校正的校正输出值中输入非光泽像素数据。