| 摘要 |
A position indicator includes a display panel which receives one end of each of a plurality of optical cables, the one ends of the optical cables being disposed to form a composite pattern such that predetermined sets of the one ends define required legends. The other ends of the optical cables terminate in a receiving station and the indicator further includes a light source capable of illuminating the other ends of the optical cables and a mask mounted for sliding movement between the light source and the receiving station. The mask serves in different positions to permit illumination of the other ends of only those optical cables whose one ends define, at the display panel, the legend corresponding to the position of the mask.
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