| 摘要 |
PROBLEM TO BE SOLVED: To obtain an excellent flare-free and ghost-free observational image in the tip section of an endoscope in which the surfaces of an illumination window and an observation window are covered with a same transparent cover without increasing the distance between the illumination and observation windows as a pastime. SOLUTION: In the front end section of the endoscope in which the illumination window 4 through which light is emitted and the observation window 3 through which images are taken in are arranged in parallel with each other at the tip 2 of an insertion part and the surfaces of the windows 3 and 4 are covered with the same transparent cover 11, a projection 13 having a smooth curved surface and a narrowed root section is formed integrally with the cover 11 at a position between the windows 3 and 4. COPYRIGHT: (C)2004,JPO
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