Compact Optical Spectrometer

摘要

A spectrometer employs multiple filters having complex filter spectra that can be generated robustly from received light over short optical path lengths. The complex filter spectra provide data that can be converted to a spectrum of the received light using compressed sensing techniques. The result is a more compact, easily manufactured spectrometer.

主权项

1. A spectrometer comprising:
a frequency filter receiving light and modifying the light according to a set of different filter spectra each defining a frequency-dependent attenuation of the received light to provide a corresponding set of filtered light beams each associated with a different filter spectra; a broadband light detector receiving the set of filtered light beams to provide a corresponding set of independent measures of each filtered light beam; an electronic computer executing a program stored in non-transient memory to receive the independent measures of the filtered light beams to generate a spectrum derived from the set of independent measures, the spectrum indicating intensity as a function of frequency for different light frequencies over a range of frequencies; wherein each different filter spectra is a broadband spectrum with substantially non-periodic variations in value as a function of frequency.