Abstract

Simulations were conducted to explore a broader collection of possible illumination patterns realizable using a white-light-emitting hemispherical digital condenser. Several simple, but practical, illumination patterns were selected and used in experiments where a sample was illuminated simultaneously from different directions. The illumination-direction multiplexing (IDM) Fourier ptychographic microscopy (FPM) method was successfully used for imaging and phase recovery. This study suggests that IDM-FPM can be used for imaging photonic crystals with subwavelength periods using traditional microscope condensers with variable numerical aperture.

© 2017 Optical Society of America

Fourier ptychographic microscopy using an infrared-emitting hemispherical digital condenser

Sanchari Sen, Ishtiaque Ahmed, Batool Aljubran, Ayrton A. Bernussi, and Luis Grave de Peralta
Appl. Opt. 55(23) 6421-6427 (2016)

Imaging photonic crystals using hemispherical digital condensers and phase-recovery techniques

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Scanning diffracted-light microscopy

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Appl. Opt. 57(25) 7329-7337 (2018)

Versatile optical microscopy using a reconfigurable hemispherical digital condenser

Sanchari Sen, Luis Molina, Dongyu Cao, Darshan B. Desai, Ayrton A. Bernussi, and Luis Grave de Peralta
Biomed. Opt. Express 6(3) 658-667 (2015)

Subwavelength resolution scanning diffracted-light microscopy using plasmonic ultra-thin condensers

Sueli Skinner-Ramos, Hira Farooq, Hawra Alghasham, Ayrton A. Bernussi, and Luis Grave de Peralta
Opt. Express 26(15) 19718-19729 (2018)