High-speed 3D Imaging with 25-Camera Multifocus Microscope

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Abstract
We here report an aberration-corrected 25-plane camera array Multifocus microscope (M25) for high-speed, high-resolution wide-field optical microscopy in three spatial dimensions (3D). We demonstrate live imaging of 25-plane 3D volumes of up to 180×180×50um at >100 volumes per second. 3D data is recorded simultaneously by an array of 25 small, sensitive, synchronized machine-vision cameras. M25 employs aberration-corrected Multifocus microscopy—an optical method where diffractive Fourier optics are used for multiplexing and refocusing light— with a simplified design for chromatic dispersion correction where a corrective diffractive gratings is placed on each camera in the array. This elegant architecture for chromatic correction will be applicable in a broad range of diffractive imaging applications. M25 is a powerful optical tool for high-speed 3D microscopy in that it allows both non-invasive, label-free bright-field and highly sensitive fluorescence microscopy. We showcase M25 capabilities in 3D particle tracking, bright-field, and fluorescence imaging in D. melanogaster , and locomotion and neural activity studies in C. elegans .
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