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Light-field imaging facilitates the miniaturization of 3D cameras while itrequires the extension of the depth-of-field (DoF) for practical applicationssuch as endoscopy and intraoral scanning. Here we report a light-field camera(LFC) using solid immersion microlens arrays (siMLAs) for 3D biomedicalimaging. The experimental results show that the focal length of MLAs isincreased by 2.7 times and the transmittance is enhanced up to 6.9% byimmersion in PDMS film. In particular, the f-number of siMLAs exceeds the limitof conventional MLAs fabricated by thermal reflow, resulting in a larger DoF.The LFC based on siMLAs has successfully acquired the depth map of a dentalphantom as a hand-held scanner. This LFC suggests a new way for developing acompact in vivo 3D imaging system.

Solid immersion microlens arrays-based light-field camera for 3D in vivo imaging