| 摘要 |
PROBLEM TO BE SOLVED: To provide a distal end of an endoscope which can obtain better observation images with neither flair nor ghost in the distal end of the endoscope in which the surfaces of a lighting window and an observation window are covered with the sametransparent cover. SOLUTION: In the distal end of the endoscope in which the lighting window 4 emitting illumination lights and the observation window 3 for taking the optical images thereinto are arranged side by side at the tips of the insertion tubes 1 and 2 and the surfaces of the lighting window 4 and the observation window 3 are covered with the same transparent cover 11, the external surface 12 corresponding to a portion covered with the observation window 3 of the transparent cover 11 is formed into a shape of a concave lens. COPYRIGHT: (C)2004,JPO
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