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    • 9. 发明公开
    • ENDOSCOPE
    • 内窥镜
    • EP2891448A1
    • 2015-07-08
    • EP13832353.0
    • 2013-07-26
    • Olympus Medical Systems Corp.
    • SUGA, TakeshiTSUYUKI, HiroshiKONNO, Mitsujiro
    • A61B1/00G02B21/36G02B23/24G02B23/26
    • G02B23/243A61B1/00096A61B1/00188A61B1/05A61B1/051G02B21/36G02B23/24G02B23/26G02B27/0075G02B27/1066H04N7/183
    • An image whose depth of field is increased is acquired without increasing a size of an apparatus. Provided is an endoscope (1) including an objective optical system (3) that is provided at a distal end of an inserted portion (2) and that acquires a subject image; an optical-path splitting means (4) that splits the subject image into two optical images that are focused differently; an imaging device (5) that acquires two images by capturing the two optical images, which are focused differently, at the same time in a state in which the two optical images are arranged on an imaging surface (5a); and a blocking means (6) for cutting out at least abutting portions of the two optical images that are arranged on the imaging device (5), wherein conditional expression A + B > C + D is satisfied, where A is half the maximum length of light-receiving regions for the optical images at the imaging surface (5a); assuming that TW is an entry angle at the imaging surface (5a) when A is at the maximum image height and d is an optical-path-length difference between the two optical images, B is given by B = d × tanTW; C is half the length of the light-receiving regions in a direction in which the individual optical images formed on the imaging surface (5a) are arranged; and D is a size of a space between the two light-receiving regions.
    • 在不增加装置的尺寸的情况下获取景深增大的图像。 提供一种内窥镜(1),该内窥镜(1)包括设置在插入部分(2)的远端并且获取被摄体图像的物镜光学系统(3) 光路分割装置(4),其将被摄体图像分割成不同聚焦的两个光学图像; 成像装置(5),其在两个光学图像被布置在成像表面(5a)上的状态下同时捕获以不同方式聚焦的两个光学图像来获取两个图像; 和用于至少切除布置在成像装置(5)上的两个光学图像的邻接部分的阻挡装置(6),其中满足条件表达式A + B> C + D,其中A是最大长度的一半 在所述成像表面(5a)处的光学图像的光接收区域; 假定当A处于最大像高并且d是两个光学图像之间的光路长度差时,TW是成像表面(5a)处的入射角,B由B = d×tanTW给出; C是在成像表面(5a)上形成的各个光学图像排列的方向上的光接收区域的长度的一半; D是两个光接收区域之间的空间的大小。