Laser-induced fluorescence detector having a capillary detection

Details Laser-induced fluorescence detector having a capillary detection Laser-induced fluorescence detector having a capillary detection

1997-12-01

1999-07-20

Kim, Robert

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

356319, G01J 330

Patent

active

059262710

ABSTRACT:
A laser-induced fluorescence detector comprises a laser beam emitting device, a dichroic mirror to deviate the laser light orthogonally, a lens with a small numerical aperture, a ball lens, a unique cell within a capillary, the cell receiving a solute containing at least one unknown fluorescent substance at the laser wavelength, the same device collecting the fluorescence emitted by the fluorescent substance, with optical filters, a photomultiplier tube, and a computer for displaying results of the analysis. The ball lens converts the laser beam into a very small divergent beam, which allows a high irradiated volume in the capillary cell. The cell employs controlled geometric contours to prevent laminar mixing and turbulence during liquid flow, and the collecting device is a high numerical aperture device, for example, a ball lens.

REFERENCES:
patent: 4348107 (1982-09-01), Leif
patent: 4548498 (1985-10-01), Folestad et al.
patent: 4714345 (1987-12-01), Schrader
patent: 5037199 (1991-08-01), Hlousek
patent: 5061361 (1991-10-01), Gordon

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