Wide-field Fourier transform spectral imaging

TL;DR

This paper demonstrates a high-throughput, wide-field spectral imaging technique using Fourier transform of temporal fluctuations recorded by a fast CMOS camera, enabling parallel spectral component measurement.

Contribution

It introduces a novel method for wide-field spectral imaging based on Fourier transform of temporal fluctuations, with experimental validation and comparison to laser Doppler imaging.

Findings

Successful experimental implementation of wide-field spectral imaging.

High temporal resolution with 2 kHz framerate CMOS camera.

Qualitative agreement with laser Doppler spectral measurements.

Abstract

We report experimental results of parallel measurement of spectral components of the light. The temporal fluctuations of an optical field mixed with a separate reference are recorded with a high throughput complementary metal oxide semi-conductor camera (1 Megapixel at 2 kHz framerate). A numerical Fourier transform of the time-domain recording enables wide-field coherent spectral imaging. Qualitative comparisons with frequency-domain wide-field laser Doppler imaging are provided.