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Phase fluorometry using a modulated electroluminescent lamp as a light source

  • US 5,281,825 A
  • Filed: 09/05/1991
  • Issued: 01/25/1994
  • Est. Priority Date: 09/05/1991
  • Status: Expired due to Term
First Claim
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1. An apparatus for detecting a change in decay time, phase angle and/or modulation, corresponding to a change in a lifetime, of a luminescence emission of at least one luminescent molecule comprising:

  • an electroluminescent lamp which outputs modulated light when driven by a first electrical signal;

    a first electrical signal generator, coupled to said electroluminescent lamp, for generating said first electrical signal to cause said electroluminescent lamp to output said modulated light having a wavelength which excites said at least one luminescent molecule to produce said luminescence emission;

    a photosensor for detecting said luminescence emission and generating a second electrical signal corresponding to said luminescence emission;

    a meter coupled to said photosensor and said first electrical signal, wherein said meter compares said first electrical signal to said second electrical signal to provide said change in decay time, phase angle and/or modulation of said luminescence emission of said at least one luminescent molecule, wherein said change corresponds to said change in a luminescence lifetime of said luminescent molecule.

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