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Augmented light field tomography through parallel spectral encoding
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DOI：10.1364/OPTICA.473848.png)
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Abstract
En 中文
Snapshot recording of transient dynamics in three dimensions (3-D) is highly demanded in both fundamental and applied sciences. Yet it remains challenging for conventional high-speed cameras to address this need due to limited electronic bandwidth and reliance on mechanical scanning. The emer-gence of light field tomography (LIFT) provides a new solution to these long-standing problems and enables 3-D imaging at an unprecedented frame rate. However, based on sparse-view computed tomography, LIFT can accommodate only a limited number of projections, degrading the resolution in the recon-structed image. To alleviate this problem, we herein present a spectral encoding scheme to significantly increase the number of allowable projections in LIFT while maintaining its snap-shot advantage. The resultant system can record 3-D dynamics at a kilohertz volumetric frame rate. Moreover, by using a multichannel compressed sensing algorithm, we improve the image quality with an enhanced spatial resolution and sup-pressed aliasing artifacts. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Keywords:
COMPRESSED ULTRAFAST PHOTOGRAPHY
TRANSIENT
ALGORITHM
