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    • 9. 发明授权
    • Swath scanning system using an optical imager
    • 扫描扫描系统使用光学成像仪
    • US6088134A
    • 2000-07-11
    • US665777
    • 1996-06-17
    • Jack H. Schmidt
    • Jack H. Schmidt
    • H04N1/028G02B13/22G02B17/08H04N1/03H04N1/04G01B9/04G02B26/08G02B3/02
    • G02B17/0856G02B13/22G02B17/008G02B17/0812H04N1/03H04N1/0303H04N2201/02456
    • The invention is a system for scanning a document. A light source illuminates the document; an imager receives light from the document and directs it toward a detector array which produces a corresponding array of electrical signals. The imager has several optical properties that are useful either individually or in combination. The imager is telecentric and thereby ensures that image size and magnification are insensitive to object displacement along the optical axis and image brightness is uniform independent of object off-axis distance. An aspheric element within the imager balances focus variation within the depth of field with spherical aberration and thereby provides nearly uniform image resolution. A diffraction pattern, carried by the imager, corrects for spectral dispersion which occurs when light passes from air into a refractive material. An imager with a reflecting surface provides a system that is subject to little or no chromatic aberration. A solid imager with multiple internal reflecting surfaces in optical series, configured to include the previously mentioned optical properties, also provides for highly stable alignment of reflecting surfaces.
    • 本发明是用于扫描文档的系统。 光源照亮文件; 成像器从文件接收光并将其引导到产生相应阵列的电信号的检测器阵列。 成像仪具有几种光学性质,可单独使用或组合使用。 成像器是远心的,从而确保图像尺寸和放大倍数对沿着光轴的物体位移不敏感,并且图像亮度均匀,独立于物体离轴距离。 成像器内的非球面元件平衡了具有球面像差的景深内的焦点变化,从而提供几乎均匀的图像分辨率。 由成像仪携带的衍射图案校正当光从空气进入折射材料时发生的光谱色散。 具有反射表面的成像器提供了受到很少或没有色差的系统。 具有配置为包括前述光学性质的光学系列中具有多个内部反射表面的固体成像器还提供反射表面的高度稳定的对准。