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Attenuation of optical fields owing to scattering and absorption limits the penetration depth into tissue. Whilst aberration correction may be used this is difficult to implement over a large field of view in heterogeneous tissue. Recently, the novel approach of attenuation-compensation of propagation-invariant light fields has shown increase in depth penetration for light-sheet microscopy. Here we show this powerful approach may be implemented in a facile manner utilizing a graded neutral density filter circumventing the need for expensive beam shaping apparatus. A ‘gold standard’ system utilizing a spatial light modulator for beam shaping is used to benchmark our low-cost implementation.
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Madhu Veettikazhy, Jonathan Nylk, Federico M. Gasparoli, Adrià Escobet-Montalbán, Anders K. Hansen, Dominik Marti, Peter E. Andersen, Kishan Dholakia, "Imaging the airy way: Advanced beam shaping for light-sheet microscopy at depth (Conference Presentation)," Proc. SPIE 11245, Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XXVII, 112450J (9 March 2020); https://doi.org/10.1117/12.2544205