Excitation-emission fluorimeter based on linear interference filters

We describe the design, properties, and performance of an excitation-emission (EE) fluorimeter that enables spectral characterization of an object simultaneously with respect to both its excitation and its emission properties. Such devices require two wavelength-selecting elements, one in the optica...

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Published in:Applied optics (2004) 2004-05, Vol.43 (15), p.3066-3072
Main Authors: Gouzman, Michael, Lifshitz, Nadia, Luryi, Serge, Semyonov, Oleg, Gavrilov, Dmitry, Kuzminskiy, Vyacheslav
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container_issue 15
container_start_page 3066
container_title Applied optics (2004)
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creator Gouzman, Michael
Lifshitz, Nadia
Luryi, Serge
Semyonov, Oleg
Gavrilov, Dmitry
Kuzminskiy, Vyacheslav
description We describe the design, properties, and performance of an excitation-emission (EE) fluorimeter that enables spectral characterization of an object simultaneously with respect to both its excitation and its emission properties. Such devices require two wavelength-selecting elements, one in the optical path of the excitation broadband light to obtain tunable excitation and the other to analyze the resulting fluorescence. Existing EE instruments are usually implemented with two monochromators. The key feature of our EE fluorimeter is that it employs lightweight and compact linear interference filters (LIFs) as the wavelength-selection elements. The spectral tuning of both the excitation and the detection LIFs is achieved by their mechanical shift relative to each other by use of two computer-controlled linear step motors. The performance of the LIF-based EE fluorimeter is demonstrated with the fluorescent spectra of various dyes and their mixtures.
doi_str_mv 10.1364/AO.43.003066
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title Excitation-emission fluorimeter based on linear interference filters
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