An instrument having an illumination source configured to illuminate a field of illumination on a surface of a substrate that is configured to hold a sample. The field of illumination typically has a diameter greater than 1 micron or an area greater than that of at least one pad of an array. The instrument also includes an interferometer, and a detectors. The instrument is configured to perform Fourier transform imaging without single spot scanning or without line scanning. Additionally, the instrument may include an illumination light source, an array detector and spectral processing electronics. A method of collecting Fourier transform (FT) data is also disclosed.
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