Abstract

The applicability of two photon excitation 4Pi confocal fluorescence microscopy to biological imaging is demonstrated. We show that 4Pi confocal microscopy in combination with a simple deconvolution algorithm allows axial localization and quantification with 0.14 μm resolution in a biological sample. The 4Pi-confocal microscope extends the applicability of far field fluorescence microscopy to high resolution three-dimensional imaging and quantification of subcellular structures.

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