| 摘要 |
This endoscopic system, which comprises a light guide forming a thick lens axially delimited by a proximal face and a distal face, is characterized in that it comprises, ahead the proximal face of the light guide (G), a focusing device (L) formed by at least two optical elements (L<u1>u, L<u2>u) which are movable with respect to each other on the optical axis (X'X) of the light guide. According to another feature, the light guide (G) is formed by at least two optical elements (G<u1>u, ... G<u4>u) coupled side by side, with different refraction indices (n<u1>u, ... n<u4>u), the optical element (G<u1>u) carrying the distal face of the light guide having an index of refraction (n<u1>u) such that the ratio of that index to the index (n) of the medium where the investigation or shooting is carried out is different from 1. Medical or veterinary tests.
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