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    • 49. 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。