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Opaque additive to block stray light in teflon® af light-guiding flowcells

  • US 20050078308A1
  • Filed: 08/04/2004
  • Published: 04/14/2005
  • Est. Priority Date: 02/25/2002
  • Status: Active Grant
First Claim
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13. A light-guiding apparatus comprising:

  • a fluid channel bounded by at least one wall, the composition of said at least one wall having an index of refraction lower than an index of refraction of a fluid in said fluid channel and having an absorption coefficient sufficient to substantially attenuate light propagating through said walls;

    an entrance for light, said entrance perpendicular to an axis of said channel;

    an exit for light, said exit perpendicular to said axis; and

    fluid inlet and outlet ports, whereby said walls and fluid effect guiding of said light by attenuated total reflection, said walls having minimal absorptive effect on the guided light.

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