High Contrast Ultrathin Light-Field Camera Using Inverted Microlens Arrays with Metal-Insulator-Metal Optical Absorber

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Light-field imaging has attracted much attention in constructing 3D objects with a simple configuration and capturing all the spatial and directional data in a single photographic exposure. Here, an ultrathin light-field camera (ULFC) for high contrast and high-resolution light-field imaging using a metal-insulator-metal optical absorber based inverted microlens arrays (MIM-iMLA) is reported. A metal-insulator-metal based optical absorber (MIM-OA) between microlenses exhibits high light absorption in the full visible region, thereby highly blocking microlens crosstalk. The MIM-iMLA double the image contrast and improve MTF50 by up to 32%, compared to conventional light-field image. In addition, the MIM-iMLA substantially reduces an image plane distance and brings the objective lens position closer to the MLA. The ULFC exhibits a short total track length of 5.1 mm, demonstrating high contrast light-field image acquisition and high accuracy 3D depth map estimation after light-field rendering. This ultrathin and high contrast light-field camera can provide a new platform for miniaturized 3D cameras in biomedical applications, biometrics, automated inspection, or mobile camera applications.
Publisher
John Wiley and Sons Inc.
Issue Date
2021-03
Language
English
Article Type
Article
Citation

Advanced Optical Materials, v.9, no.6, pp.2001657

ISSN
2195-1071
DOI
10.1002/adom.202001657
URI
http://hdl.handle.net/10203/281743
Appears in Collection
BiS-Journal Papers(저널논문)
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