3 November 2003 Pupil function engineering for confocal microscopy
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The use of radially polarized light is known to produce, when focused by a high numerical aperture objective lens, a spot of light whose polarization is predominantly axial. We have generated radially polarized beams accurately and have confirmed this behavior experimentally and have also shown that the axial polarization leads to a ring type image of sub-resolution gold beads.
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Tony Wilson, Tony Wilson, F. Massoumian, F. Massoumian, Rimas Juskaitis, Rimas Juskaitis, } "Pupil function engineering for confocal microscopy", Proc. SPIE 5175, Laser Beam Shaping IV, (3 November 2003); doi: 10.1117/12.511999; https://doi.org/10.1117/12.511999

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