| 摘要 |
<p>A lamp having a main and an assistant reflector disposed mutually coaxially and having different parameters and focal regions includes a light source disposed in the focal region of the assistant reflector so that the main reflector emits a hollow conical light beam, and means associated with the assistant reflector for diverting light of the assistant reflector into a solidly conical light beam, the means being of such dimensions that the aperture angle of the solidly conical light beam of the assistant reflector and the aperture angle of the hollow conical light beam of the main reflector correspond to such an extent that both the hollow conical and solidly conical light beams exhibit at least one of the characteristics of supplementing and overlapping one another.</p> |
