Fourier Multispectral Imaging

Thursday, October 17, 2019 - 9:50am - 10:35am
Keller 3-180
Keigo Hirakawa (University of Dayton)
We demonstrate a single-shot multispectral imaging system using a fundamentally different approach compared with present-day methods. Conventional multispectral imagers utilize narrowband spectral filters, which makes the system application-specific. By using filters with sinusoidally varying transmittance, known as Fourier filters, we demonstrate an application-agnostic multispectral system. We designed and fabricated this Fourier filter array, integrated it with a commercial CCD image sensor, and acquired and reconstructed the spectral information from multiple targets. Compared with narrowband multispectral imagers, this system generalizes well to applications where we lack a priori knowledge of the spectral content of the scene, which makes it a versatile acquisition device for a wide range of applications.