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Millimeter-sized particle sensor using a wide field of view monolithic lens assembly for light scattering analysis in Fourier domain

Abstract : We present our latest advances in the field of miniature optical particulate matter sensors. By illuminating a single particle in an air channel, one can record the light scattering signature with a CMOS image sensor and then, classify particles. This signature is pre-processed optically with an advanced, millimeter-sized, monolithic, refracto-reflective optical system. It performs notably a Fourier transform with very wide FoV of scattering angles, and includes as well integrated fluidics and alignment. Functional prototypes were fabricated using laser micro machining on glass, selective polishing, and were replicated with epoxy resin using a molding process.
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https://hal.archives-ouvertes.fr/hal-03052755
Contributor : Cecile Jamois <>
Submitted on : Thursday, December 10, 2020 - 5:33:12 PM
Last modification on : Friday, December 18, 2020 - 12:49:50 PM

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Gabriel Jobert, Maryse Fournier, Salim Boutami, Cécile Jamois, Andrea Lovera, et al.. Millimeter-sized particle sensor using a wide field of view monolithic lens assembly for light scattering analysis in Fourier domain. SPIE OPTO 2020, Feb 2020, San Francisco, United States. ⟨10.1117/12.2544185⟩. ⟨hal-03052755⟩

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