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    • 41. 发明授权
    • Optical scanner
    • 光学扫描仪
    • US3778129A
    • 1973-12-11
    • US3778129D
    • 1972-08-31
    • WILDHABER E
    • WILDHABER E
    • G06K7/10G06K9/20H04N1/029H04N1/12G02B17/00
    • G06K7/10831G06K9/2009H04N1/029H04N1/12H04N1/126
    • This optical scanner uses a rotor with lenses. The lens surfaces are special and made up of surface elements parallel to the rotor axis. Preferably the source of light is a laser emitting very nearly parallel light rays. The rays are directed through a narrow line-like area that may lie on the rotor axis, and that emits a narrow fixed light bundle. A rotor lens forms an image of said line-area on a record. The thus illuminated area moves along a character line of the record as the rotor turns. To cover the entire length of a line of characters with the fixed narrow light bundle, the lens profile in a plane perpendicular to the rotor axis has a varying curvature. Its curvature radius is smallest in the mid-portion. The light reflected from the illuminated record area is gathered by a stationary elongated lens that extends along a plane perpendicular to the rotor axis at a constant distance from the record surface. This elongated lens has a portion, such as an opening, adapted to let the incoming light through without alteration. The reflected light passing through said elongated lens and through the adjacent lens of the rotor reaches a photocell.
    • 该光学扫描器使用具有透镜的转子。 透镜表面是特殊的,由平行于转子轴线的表面元件组成。 优选地,光源是发射非常接近平行的光线的激光。 光线被引导通过可能位于转子轴线上的窄线状区域,并且发射窄的固定光束。 转子透镜在记录上形成所述线区域的图像。 当转子转动时,这样照亮的区域沿着记录的字符线移动。 为了用固定的窄光束覆盖一行字符的整个长度,垂直于转子轴的平面中的透镜轮廓具有变化的曲率。 其曲率半径在中间部分最小。 从照明记录区域反射的光由固定的细长透镜聚集,该透镜在垂直于转子轴线的平面上以与记录表面恒定的距离延伸。 该细长透镜具有适于使入射光通过而不改变的部分,例如开口。 通过所述细长透镜并通过转子的相邻透镜的反射光到达光电池。