MULTIPLEXED EXCITATION EMISSION MATRIX SPECTROSCOPY

摘要

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.

主权项

1. An EEM spectrometer, comprising:
at least one excitation light source; a multiplexer that encodes excitation light produced by the at least one excitation light source; a conduit that conducts encoded excitation light to a sample; a conduit that conducts encoded emitted light from the sample; a detector that detects the encoded emitted light; a demultiplexer that decodes the encoded emitted light and produces an output signal; and, optionally, a display device that that displays the output signal.