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Apparatus and methods for time-resolved spectroscopic measurements

  • US 6,483,582 B2
  • Filed: 01/19/2001
  • Issued: 11/19/2002
  • Est. Priority Date: 07/27/1998
  • Status: Expired due to Fees
First Claim
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1. A method for measuring the temporal response properties of a luminescent sample, comprising:

  • outputting a light beam from a light source, the light beam having a relatively constant intensity;

    modulating the light beam to create a modulated incident light, the modulated incident light having a maximum intensity that is substantially equal to the intensity of the light beam from the light source and a minimum intensity that is less than one-quarter of the maximum intensity;

    illuminating the sample with the modulated incident light, where the modulated incident light generates a modulated luminescence in the sample;

    measuring at least one of an amplitude and a phase of the modulated luminescence relative to the modulated incident light; and

    computing a temporal response characteristic of the sample based on the measured amplitude and/or phase.

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