| 摘要 |
PCT No. PCT/GB92/00744 Sec. 371 Date Oct. 25, 1993 Sec. 102(e) Date Oct. 25, 1993 PCT Filed Apr. 23, 1992 PCT Pub. No. WO92/19956 PCT Pub. Date Nov. 12, 1992.Apparatus for use in optical spectroscopy comprises an input fiber (21) for launching by way of a collimating lens (22) radiation towards a chamfered input surface (23) of a probe head (24) of sapphire and having at least five surfaces (25-29) exposable to a sample under test and a chamfered exit surface 30 positioned to direct the radiation towards a further lens (31) and an output fiber (32).
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