| 摘要 |
<p>An arrangement with at least two atomic line spectral lamps (1, 2; 15, 16) transmitting a parallel light ray bundle (19, 20) and means for unifying the ray bundles in a common measurement ray path (10) is described, which is characterised in that, as means for unifying the ray bundles (19, 20), a concave mirror (5) and a secondary mirror (7, 12, 14) lying on the optical axis (6) of the concave mirror (5) are provided, the atomic line spectral lamps (1, 2; 15, 16) being arranged in such a manner that the optical axes (3, 4) of their ray bundles (19, 20) lie parallel to the optical axis (6) of the concave mirror (5) and outside the region covered by the secondary mirror (7, 12, 14). <IMAGE></p> |
