| 摘要 |
A luminaire (100) comprising: a, a radiation source (16), a first optical element (10a) and a second optical element (10b) each with a non-planar surface (14a, 14b), wherein, in a base state, the second optical element (10b) engages in the first optical element (10a) with its non-planar surface (14a) in an exact fit, wherein the first and the second optical element (10a, 10b) are movable relative to each other, and wherein the first and the second optical element (10a, 10b) are identical in construction.
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