Fig. 3: Metasurface applications for the field of view expansion imaging. | npj Nanophotonics

Fig. 3: Metasurface applications for the field of view expansion imaging.

From: From performance to structure: a comprehensive survey of advanced metasurface design for next-generation imaging

Fig. 3: Metasurface applications for the field of view expansion imaging.The alternative text for this image may have been generated using AI.

a Single-element diffraction-limited fisheye metalens with a FOV exceeding 170°57. b Wide-angle metasurface doublet corrected for monochromatic aberrations63: i. Schematic drawing of the monolithic metasurface doublet lens; ii. Modulation transfer function (MTF) of the metasurface doublet lens; iii. MTF of the singlet lens. c Metalens array-integrated compact imaging devices for wide-field microscopy65: i. Phase distribution of the proposed metalens in the x–y plane; ii. Optical microscope image of the proposed metalens; iii. Photograph of the fabricated 6 × 6 proposed metalens array; iv. Photograph of the prototype of metalens-integrated imaging device; v. Raw images of the USAF 1951 resolution chart with LCP (left panel) and RCP (right panel) illuminations; vi. Stitched image from sub-images of (v) through image processing. d Planar wide-angle imaging camera enabled by a metalens array66. e Near-IR wide-field-of-view Huygens metalens68: i. Optical layout and nominal MTF; ii. Metalens outdoor image. f Ultra-wide FOV meta-camera with transformer-neural-network, demonstrating over 100° FOV with a 13.5-fold contrast enhancement70: i. Neural meta-camera mode; ii. Ray-tracing simulation results; iii. Simulated MTF curves at different FOVs.

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