Freeform-based High Numerical Aperture Optics for Confocal Raman/SERS Spectroscopy

Qing Liu; Hugo Thienpont; Heidi Ottevaere

doi:10.1364/FREEFORM.2021.RW1A.3

OSA Optical Design and Fabrication 2021 (Flat Optics, Freeform, IODC, OFT)
OSA Technical Digest (Optica Publishing Group, 2021),
paper RW1A.3
•https://doi.org/10.1364/FREEFORM.2021.RW1A.3

Freeform-based High Numerical Aperture Optics for Confocal Raman/SERS Spectroscopy

Qing Liu, Hugo Thienpont, and Heidi Ottevaere

Freeform Optics 2021

Washington, DC United States
27 June–1 July 2021
ISBN: 978-1-943580-88-0

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Freeform I (RW1A)

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Q. Liu, H. Thienpont, and H. Ottevaere, "Freeform-based High Numerical Aperture Optics for Confocal Raman/SERS Spectroscopy," in OSA Optical Design and Fabrication 2021 (Flat Optics, Freeform, IODC, OFT), F. Capasso, W. Chen, P. Dainese, J. Fan, J. DeGroote Nelson, F. Duerr, J. Rogers, J. Rolland, P. Clark, R. Pfisterer, H. Rehn, S. Thibault, M. Jenkins, D. Wook Kim, and N. Trela-McDonald, eds., OSA Technical Digest (Optica Publishing Group, 2021), paper RW1A.3.

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Abstract

We present a confocal Raman spectroscopy setup that consists of a conical beam shaper and a segmented reflector with an ultra-high NA (0.984) and a long working-distance. The confocal behavior of our system is assessed with simulations and experiments.

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