| 摘要 |
PCT No. PCT/GB94/02189 Sec. 371 Date Jun. 4, 1997 Sec. 102(e) Date Jun. 4, 1997 PCT Filed Oct. 5, 1994 PCT Pub. No. WO96/11412 PCT Pub. Date Apr. 18, 1996A flexible tube for providing a radiation emitting source. The flexible tube contains a plurality of spaced infrared emitting diodes uniformly arranged along its length and bent into a circle with ends meeting at a junction. The emitting source is controlled to emit radiation which is not visible to the human eye, but can be detected by a device capable of detecting emitted radiation.
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