Fluorescence locating system and method

Radiant energy – Luminophor irradiation – With ultraviolet source

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Details

250203R, 250458, G01N 2138

Patent

active

040190609

ABSTRACT:
A system for identifying and locating objects of known chemical composition and discriminating against a background having a different chemical composition comprises a source of radiation for illuminating the object and the background and a receiver responsive solely to the fluorescent radiation from the object. The receiver comprises a filter which passes radiation from the object and a photodetector array which receives the filter output and produces an output containing the coordinates of the location of the received signal or signals on the array. This location information is applied to utilization apparatus which may comprise a marking mechanism which marks the location of the object on the background or automatic tracking apparatus which tracks the object of interest or counter apparatus which identifies the quantity of such objects that are illuminated.
The invention also comprehends the method of deriving position data by causing a known substance to fluoresce at wavelengths (centered at .lambda..sub.0) different from that of the source which illuminates the substance, filtering out all light but that at the .lambda..sub.0 wavelength, directing said .lambda..sub.0 light against an array of transducer cells and producing an output having coordinates of the cell receiving the .lambda..sub.0 energy, and feeding the output of the array to utilization apparatus.

REFERENCES:
patent: 3617744 (1971-11-01), Irish
patent: 3685650 (1972-08-01), Walther et al.
patent: 3770349 (1973-11-01), Legorreta-Sanchez
patent: 3811777 (1974-05-01), Chance
patent: 3935922 (1976-02-01), Cooper et al.

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