Optical surface plasmon sensor device

Details Optical surface plasmon sensor device Optical surface plasmon sensor device

1987-11-02

1989-07-04

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

356445, G01N 2155, G01N 2163

Patent

active

048446130

ABSTRACT:
An optical sensor device uses surface plasmon resonance to detect the presence of a specific material. A transparent body (12) is coated with a thin gold film (14) which film may be coated e.g. with an antibody material. The arrangement is illuminated with a divergent light beam and light internally reflected from the gold film is detected by a photodiode array (16). The dielectric conditions adjacent the gold film determine the position of the surface resonance angle, this being indicated by a dark area on the detector array.

REFERENCES:
patent: 3984189 (1976-10-01), Seki et al.
patent: 4681451 (1987-07-01), Guerra et al.

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