A shadow image microscope based on an array of nanoLEDs

Joan Canals; Victor Moro; Nil Franch; Sergio Moreno; Oscar Alonso; Anna Vilà; Juan Daniel Prades; Jan Gülink; Daria D. Bezshlyakh; Andreas Waag; Angel Diéguez

doi:10.1117/12.2559394

30 March 2020 A shadow image microscope based on an array of nanoLEDs

Joan Canals, Victor Moro, Nil Franch, Sergio Moreno, Oscar Alonso, Anna Vilà, Juan Daniel Prades, Jan Gülink, Daria D. Bezshlyakh, Andreas Waag, Angel Diéguez

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Proceedings Volume 11351, Unconventional Optical Imaging II; 113510D (2020) https://doi.org/10.1117/12.2559394
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

This work presents a compact low-cost and straightforward shadow imaging microscopy technique based on spatially resolved nano-illumination instead of spatially resolved detection. Independently addressable nano-LEDs on a regular 2D array provide the resolution of the microscope by illuminating the sample in contact with the LED array and creating a shadow image in a photodetector located on the opposite side. The microscope prototype presented here is composed by a GaN chip with an 8x8 array of 5μm-LEDs with 10 μm pitch light sources and a commercial CMOS image sensor with integrated lens used as a light collector. We describe the microscope prototype and analyze the effect of the sensing area size on image reconstruction.

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Joan Canals, Victor Moro, Nil Franch, Sergio Moreno, Oscar Alonso, Anna Vilà, Juan Daniel Prades, Jan Gülink, Daria D. Bezshlyakh, Andreas Waag, and Angel Diéguez "A shadow image microscope based on an array of nanoLEDs", Proc. SPIE 11351, Unconventional Optical Imaging II, 113510D (30 March 2020); https://doi.org/10.1117/12.2559394

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