Description Converts phase shifts induced by transparent samples into intensity differences, enhancing contrast without labeling. Equipment Zeiss (Carl Zeiss Microscopy Gmbh) Axio Observer 7 / Apotome Zeiss (Carl Zeiss Microscopy Gmbh) Axio Observer 7 Bruker JPK Nanowizard UltraSpeed / AFM Bruker JPK Nanowizard UltraSpeed