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4Pi microscopy of type A with 1-photon excitation in biological fluorescence imaging
Author(s) -
Marion Lang,
Tobias Müller,
Johann Engelhardt,
Stefan W. Hell
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.002459
Subject(s) - optics , microscopy , deconvolution , materials science , two photon excitation microscopy , light sheet fluorescence microscopy , fluorescence lifetime imaging microscopy , resolution (logic) , fluorescence microscope , microscope , fluorescence , confocal microscopy , image resolution , scanning confocal electron microscopy , physics , artificial intelligence , computer science
We demonstrate that oil immersion lenses with a semi-aperture angle >/= 74 degrees enable 4Pi confocal fluorescence microscopy of type A with 1 photon excitation. The axial sidelobes amount to < 50 % of the main diffraction maximum, implying that lobe induced artifacts can be removed from the image data. The advancement reported herein enables a relative inexpensive implementation of 4Pi microscopy, providing axially superresolved 3D-imaging in transparent samples. As an example, we show dual-color 4Pi images of double stained Golgi stacks in a mammalian cell with 110 nm axial resolution. The resolution can be further enhanced to values slightly below 100 nm by image deconvolution.

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