| 摘要 |
The apparatus includes at least one luminescence chamber (2) formed in a plate (1) preferably made in a transparent material, the chamber being defined at its opening by a perforated support lattice (5) carrying a filter (4), the lattice opening out into and being carried sealingly against the plate (1) with the aid of a liquid-sealing and opaque collection vessel (6). The plate (1) includes a portion (7) above or opposite the opening (3) of the chamber (2), the portion (7) being transparent, and above it there being means (8) for registering a light flux caused by luminescence, said means (8) being situated in an opaque housing (13) sealing against the plate (1) and covering the portion (7). |
