| 摘要 |
The apparatus consists of at least two parallel arranged systems, where each is formed by two transparent cover plates (1, 2, 3) between which there is a core (10, 20, 30) of transparent supporting material, containing a photoluminophor. The transparent cover plates (1, 2, 3) have a smaller index of refraction than the given core (10, 20, 30) with the photoluminophor.<IMAGE>
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