MFM setup. MFM setup. The excitation lasers are combined in a fiber through an acousto-optic tunable filter, collimated, reflected on a dichroic mirror.

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MFM setup. MFM setup. The excitation lasers are combined in a fiber through an acousto-optic tunable filter, collimated, reflected on a dichroic mirror (DM), and focused at the back aperture of a high-N.A. objective to achieve wide-field excitation. The collected emission is transmitted through the DMs and passes through the MFG placed in a plane conjugated to the back pupil plane of the objective. The diffraction orders pass through the chromatic correction module before being separately focused on the detector. To record sample and stage drift, polystyrene beads (4-μm diameter) were immobilized on the cover glass, illuminated by an infrared light-emitting diode (IR LED), and their diffraction pattern was recorded with an IR camera (IR CAM) through an additional beamsplitter inserted into the emission path. The graphs are the recorded positions of the bead along the x and z axes. (Lower Inset) Example of emitting molecules recorded at different z planes corresponding to labeled nucleopores (the raw data are in Movie S1, and a reconstructed image is in Movie S2). (Scale bar: 5 μm.)‏ Bassam Hajj et al. PNAS 2014;111:49:17480-17485 ©2014 by National Academy of Sciences