US 10,481,092 B2 · Multiplexed excitation emission matrix spectroscopy

Abstract

Described herein is an excitation emission matrix (EEM) spectrometer and method, comprising a multiplexer that encodes excitation light produced by at least one excitation light source; and a demultiplexer that decodes encoded light emitted from a sample, and produces an output indicative of a characteristic of the sample. Embodiments are described wherein the multiplexer and the demultiplexer may comprise FDM or OFDM, and wherein both the excitation light and the emitted light may be encoded using a DMA or a SLM. In some embodiments the same DMA or SLM may be used to encode the excitation light and the emitted light. In some embodiments excitation light may be encoded using a Walsh function, or the excitation light may be encoded using a Walsh function and the emitted light may be decoded using an inverse Hadamard transformation.

Claims23

Dependent claims

An excitation emission matrix (EEM) spectrometer, comprising:

at least one excitation light source that produces an excitation light spectrum;
a multiplexer that:
divides the excitation light spectrum into a plurality of discrete excitation wavelength ranges;
selects three or more discrete excitation wavelength ranges from the plurality of discrete excitation wavelength ranges while rejecting remaining discrete excitation wavelength ranges;
and
encodes the selected three or more discrete excitation wavelength ranges according to a binary function;
a conduit that conducts the encoded three or more discrete excitation wavelength ranges to a sample;
a conduit that conducts an encoded emitted light from the sample;
a spectrometer that detects the encoded emitted light and resolves a spectrum of the encoded emitted light;
and
a demultiplexer that decodes the encoded three or more discrete excitation wavelength ranges in the emitted light spectrum according to the binary function to produce an output EEM spectrum.

8 more elements

Dependencies are inferred from the claim text.

Multiplexed excitation emission matrix spectroscopy

Life of this patent

Multiplexed excitation emission matrix spectroscopy

Life of this patent

Abstract

Claims23