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Fig. 10 | PhotoniX

Fig. 10

From: Imaging based on metalenses

Fig. 10

Light-field imaging applications of metalenses. (a) Upper panel: schematic diagram of light-field imaging with metalens array and rendered images. An objective is used to collect the circularly polarized light on the achromatic metalens array and form an intermediate image in front of the achromatic metalens array. Lower panel: rendered images focusing on the rocket with depths of 50 cm, 54 cm and 66.5cm [102]. (b) Quantification of the imaging resolution of the light-field system with an achromatic metalens array [102]. (c) Schematic of the broadband achromatic metalens array showing the principle of white-light achromatic integral imaging [103]. (d) Upper panel: reconstructed images in the case that the number “3” is closer to the central depth plane than the letter “D”, and they are focused on “3” plane. Lower panel: reconstructed images in the case that the number “3” is closer to the central depth plane than the letter “D”, and they are focused on “D” plane. Scale bar: 100 μm [103]. (e) Schematic of the metalens depth sensor estimating depth by mimicking the jumping spider. The work principle is that a metalens is designed to simultaneously capture 2 images with different defocus and then efficient calculations is performed to produce depth from these images [104]. (f) Geometric light path diagram of light passing through the designed metalens [104]

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