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    • 4. 发明申请
    • AUTOFOCUS DEVICE
    • 自动装置
    • US20120193511A1
    • 2012-08-02
    • US13345315
    • 2012-01-06
    • Kenji OkabeSeiji ShimokawaKazuki Kitagawa
    • Kenji OkabeSeiji ShimokawaKazuki Kitagawa
    • G02B27/40
    • G02B21/245
    • Provided is an autofocus device comprising: an optical source; an optical unit that allows emitted light from the optical source and object light from a measurement target to pass through the same optical path, the optical unit being arranged between the optical source and the measurement target; and a detection unit that performs focus detection by using the object light passed through the optical unit, wherein the optical unit comprises: a tube lens that forms the emitted light into parallel light; a line-like image forming unit that forms a line-like image on a surface of the measurement target by the parallel light from the tube lens; and a rotation unit that rotates the line-like image.
    • 提供了一种自动对焦装置,包括:光源; 光学单元,其允许来自光源的发射光和来自测量对象的物体光通过相同的光路,光学单元布置在光源和测量对象之间; 以及检测单元,其通过使用通过所述光学单元的物体光进行焦点检测,其中所述光学单元包括:将所发射的光形成为平行光的管透镜; 线状图像形成单元,其通过来自管透镜的平行光在测量对象的表面上形成线状图像; 以及使线状图像旋转的旋转单元。