| 摘要 |
A replaceable and reusable optical coupling device, suitable for use in a biosensor, for the coupling of light from a first solid optically transparent medium (2) to a second solid optically transparent medium (4) comprises opposite elastic contact portions (6, 7) for contacting the first and second solid media (2, 4) and has a refractive index matching with these media. At least one of the contact portions (6, 7) has a convex surface and is adapted to be compressed when pressed against one of the two solid media (2, 4) to provide an optically coupling contact area. In its non-compressed state, the convex portion has a maximum height over its periphery in the range of about 5 - 280 mu m, preferably in the range of about 12 - 140 mu m, and a ratio of maximum height to maximum lateral extension in the range of about 0.00008 - 0.05, preferably from about 0.0001 - 0.03. In its compressed state, the convex surface portion is elastically deformed to provide an optical coupling area with uniform light transmission in the range of about 12 to about 5000 mm<2>, preferably in the range about 28 - 1500 mm<2>.
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