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    • 31. 发明公开
    • Method for obtaining images of a cornea and apparatus for same
    • Verfahren und Vorrichtung zur Gewinnung von Bildern der Hornhaut。
    • EP0628281A1
    • 1994-12-14
    • EP94108886.6
    • 1994-06-09
    • KONAN COMMON CO., LTD.
    • Kasahara, Tatsuya, c/o KONAN COMMON CO., LTD.Hamada, Yoichi, c/o KONAN COMMON CO., LTD.
    • A61B3/135A61B3/107A61B3/14
    • A61B3/0058A61B3/1005A61B3/107A61B3/135A61B3/145
    • An apparatus for observing or photographing corneal cells (such as cornea endothelium and epithelium) provides for optical axis alignment and focussing of an imaging system (3). The apparatus is capable of assessing the position of the area to be photographed and of measuring corneal thickness from the endothelium image so produced.
      A whole imaging system (3) which comprises:-
         an indicator projecting means (23),
         an eye-front observation optical system (6),
         an illuminating system (11) for obliquely illuminating the eyeball surface (2) through a slit (16),
         an optical system (19) for forming an enlarged image of the subject-part by the TV camera (8),
      and
         a "corneal cell focussing" photo-detector (30).
      The corneal cell focussing photo-detector (30) is automatically moved in X- and Y- directions with respect to the optical axis (4), so that the light spot (40) on a monitor screen (33) is brought to a specified position on the screen. When the light spot (40) is brought to this specified position, the eye-front image is recorded and, thereafter, the imaging system (3) is started and the system (3) moves forward so as to track the light spot (40) towards the subject's eye (1). By means of the photo-detector (30), an enlarged image of the corneal cells is recorded and displayed simultaneously with the eye-front image on which the light spot (40) is positioned.
    • 用于观察或拍摄角膜细胞(例如角膜内皮和上皮)的装置提供成像系统(3)的光轴对准和聚焦。 该装置能够评估要拍摄的区域的位置以及从如此产生的内皮图像测量角膜厚度。 一种整体成像系统(3),包括:指示器投影装置(23),眼前观察光学系统(6),照明系统(11),用于通过狭缝(16)倾斜地照射眼球表面 ),用于通过TV摄像机(8)形成被摄体部分的放大图像的光学系统(19)和“角膜细胞聚焦”光检测器(30)。 角膜细胞聚焦光检测器(30)相对于光轴(4)在X和Y方向上自动移动,使得监视器屏幕(33)上的光斑(40)被指定 屏幕上的位置 当光点(40)被带到该指定位置时,记录眼前图像,此后开始成像系统(3),并且系统(3)向前移动以跟踪光点(40 )朝向主体的眼睛(1)。 借助于光电检测器(30),角膜细胞的放大图像被记录并与其上定位有光斑(40)的眼前图像同时显示。