Low-cost spectrometry system for end-user food analysis

摘要

A compact spectrometer is disclosed that is suitable for use in mobile devices such as cellular telephones. In preferred embodiments, the spectrometer comprises a filter, at least one Fourier transform focusing element, a micro-lens array, and a detector, but does not use any dispersive elements. Methods for using the spectrometer as an end-user device for performing on site determinations of food quality, in particular, by comparison with an updatable database accessible by all users of the device, are also disclosed.

主权项

1. A compact spectrometer system for obtaining a spectrum of a sample, comprising:
an optical detector for detecting light emanating from said sample; an optical filter located between said sample and said detector to provide an angularly encoded spectrum; a Fourier transform focusing element disposed between said optical filter and said detector; and a diffuser disposed between said sample and said optical filter, wherein the Fourier transform focusing element transforms the angularly encoded spectrum into a spatially encoded spectrum of light of different wavelengths, the spatially encoded spectrum arriving at a plurality of positions on the detector with each of the plurality of positions on the detector correlated to a wavelength of the spatially encoded spectrum.