Recent interest in building an imaging system using diffractive optics that can fit on a CubeSat (10 cm x 10 cm x 30 cm) and can correct severe chromatic aberrations inherent to diffractive optics has led to the development of the Fresnel zone light field spectral imaging system (FZLFSI). The FZLFSI is a system that integrates an axial dispersion binary diffractive optic with a light field (plenoptic) camera design that enables snapshot spectral imaging capability. This system suffered from poor resolution and a modified FZLFSI based on full resolution light field rendering has been built and tested. The modified FZLFSI shifts the optical elements to different positions which change the way the light field is encoded on the focal plane array. The new encoding increases the available spatial information at the expense of some spectral information. The system was tested for different internal system parameters, at a range of wavelengths, and the resulting tradeoffs between spatial and spectral performance were studied. The performance of the modified FZLFSI was compared to that of the conventional FZLFSI and optimal internal system parameters identified for different imaging scenarios.
Carlos Diaz, Anthony L. Franz, and Jack A. Shepherd , "Modification of Fresnel zone light field spectral imaging system for higher resolution (Conference Presentation)," Proc. SPIE 10644, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV, 106441C (Presented at SPIE Defense + Security: April 19, 2018; Published: 14 May 2018); https://doi.org/10.1117/12.2303898.5783306258001.
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