| 摘要 |
PROBLEM TO BE SOLVED: To provide a small sized capsule endoscope good in the processability of transparent cover, having a simple constitution and which can make unnecessary light from an illumination means hard to enter an object optical system. SOLUTION: The capsule type endoscope includes at least an illumination means 25 for illuminating a subject, and image pickup means for picking up the image of the subject and the transparent cover 17 for covering the illumination means and the image pickup means. The image pickup means is equipped with the object optical system and an image pickup element 24. The incident pupil position of the object optical system is arranged so as to almost coincide with the center position of the curvature of the transparent cover and the illumination means is arranged so that the region symmetric to the illumination means centering around the optical axis 101 of the object optical system is overlapped with the area not used in imaging of the image pickup surface 100 of the image pickup element when the object optical system arranged in a capsule is looked from the front on the side of the subject. COPYRIGHT: (C)2004,JPO
|
