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Cognex Corp. - Smart Sensor 3-24 GIF LB

Infrared Diode Laser Excites Visible Fluorophores

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Brent D. Johnson, Senior News Editor

Many diagnostic and biological tests use antibodies or DNA probes, called markers, that bond to specific biological structures and fluoresce when excited by a specific optical wavelength. Typically, the fluorophores emit at a frequency longer than the excitation wavelength; that is, toward the red spectrum. However, if the excitation and emission signals are proximate in wavelength, separating them at the detector can sometimes be difficult. Infrared light may not excite fluorescence in biological tissue, but it does excite nanospheres synthesized from rare-earth materials appearing here...Read full article

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    Published: December 2001
    Accent on Applicationsantibodies DNA probesApplicationsdefenseSensors & Detectors

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