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High-speed multiple wavelength illumination source, apparatus containing the same, and applications thereof to methods of irradiating luminescent samples and of quantitative luminescence ratio microscopy

  • US 5,491,343 A
  • Filed: 03/25/1994
  • Issued: 02/13/1996
  • Est. Priority Date: 03/25/1994
  • Status: Expired due to Term
First Claim
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1. A vibration-free method of irradiating a sample, comprising the steps of:

  • (A) irradiating said sample with light having a first wavelength, a first intensity or both a first wavelength and a first intensity, by passing an electric current having a first value through a first arc and passing an electric current having a second value through a second arc, said first value being greater than said second value; and

    within a period of time of from 1 nanosecond (1 ns) to 1 second (1 s) of said irradiating step (A),(B) irradiating said sample with light having a second wavelength, a second intensity or both a second wavelength and a second intensity by reducing the value of said electric current passed through said first light source to a third value and increasing said electric current through said second light source to a fourth value, said fourth value being greater than said third value,wherein each of said arcs has a wattage of from 10 to 2000 W.

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