Method and apparatus for detecting singlet state resonance fluor

Details Method and apparatus for detecting singlet state resonance fluor Method and apparatus for detecting singlet state resonance fluor

1983-12-22

1985-11-26

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

2504581, 2504591, 356367, G01N 2164

Patent

active

045551774

ABSTRACT:
A method and apparatus for detecting the wavelength of singlet state resonance fluorescence of a sample, wherein the sample is illuminated sequentially with various incident wavelengths. For each wavelength, linearly polarized and circularly polarized components are allowed to pass sequentially by a first polarizer to the sample. The sample emits light as a result of spontaneous molecular energy transitions. Four components of the emitted light are allowed to sequentially pass to a detector by a second polarizer. The intensities of these components are then detected, and these values can be employed to obtain a new ratio for each wavelength. The wavelength at which this ratio equals one is selected as the wavelength of resonance fluorescence. In one example, a computer is provided to control the illumination of the sample and the two polarizers, and also may be utilized to compute the above ratios.

REFERENCES:
patent: 3897155 (1975-07-01), Smythe
patent: 4031399 (1977-06-01), Klein et al.
patent: 4203670 (1980-05-01), Bromberg
patent: 4299486 (1981-11-01), Nogami et al.
Barrett et al. "Detection of Triplet States in a Laser Dye from Linear and ircular Polarization Studies"; Applied Optics, vol. 22, p. 2522, Sep. 1, 1983.

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