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Fig. 1 | PhotoniX

Fig. 1

From: Adaptive optical quantitative phase imaging based on annular illumination Fourier ptychographic microscopy

Fig. 1

(a) The AO-QPI prototype platform where we adopt a programmable LED array to replace the conventional Köhler illuminator as the light source. (b) The workflow of the reconstruction process of AO-QPI. (c) Schematic diagram of the illumination system. The LED array is adjusted to an appropriate height so that 6 LED elements in the array provide the NA-matched illuminations. (d) The comparison of phase reconstruction with/without AO-QPI. The intensity cost function gradually reduces after enabling AO-QPI and finally converges after \(\sim \,100\) iterations

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