Assay system

  • US 5,554,340 A
  • Filed: 10/23/1995
  • Issued: 09/10/1996
  • Est. Priority Date: 08/03/1992
  • Status: Expired due to Term
First Claim
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1. An apparatus comprising, in combination:

  • focussing optical lens means;

    a conduit means of substantially uniform cross-sectional dimension disposed within said lens means for fluid flow of a fluid sample therethrough, and extending transversely to an optical axis of said lens means through a focal region of said lens means; and

    a porous mass of light-transparent material disposed in said conduit means, the porosity of said mass being selected to permit fluid flow of said fluid sample therethrough, said apparatus being arranged and constructed such that said lens means focuses light rays that emanate from said porous mass within said conduit means, said lens means focussing said light rays by refraction.

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