Method and Apparatus for Imaging a Structure Marked with a Fluorescent Dye
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United States of America Patent
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Dec 11, 2013
filing date -
Jun 15, 2011
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Abstract
In a method for imaging a structure (33) marked with a fluorescent dye in a sample, the sample is repeatedly scanned in a scanning range (28) with a light intensity distribution localised around a focal point (29) of a focused fluorescence excitation light beam. The light intensity distribution further comprises a focused fluorescence inhibiting light beam (7) whose wave fronts are modulated so that a fluorescence inhibiting light intensity distribution comprises a minimum at the focal point (29) of the fluorescence excitation light beam (4). The scanning conditions are coordinated in such a way that the fluorescence light is emitted out of the scanning range (28) as individually detectable photons. When these photons are detected, the location (32) of the focal point (28) at the respective point in time is allocated to them. An image of the structure (33) is composed of the locations (32) to which the detected photons have been allocated during several repetitions of scanning the scanning range (28).
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