We examine the effects of detector size on the imaging properties of a scanning phase contrast microscope. The lateral size of the point-spread function is found to be wider when a point detector is used than when a much larger detector is used. Combining this finding with the well-known difficulties involved in using a confocal microscope in transmission mode suggests that a phase contrast microscope employing a point detector will in general have inferior imaging properties compared with one employing a large detector.
© 2004 Optical Society of America
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(180.1790) Microscopy : Confocal microscopy
(180.5810) Microscopy : Scanning microscopy
(260.3160) Physical optics : Interference
Peter R. T. Munro and Peter Török, "Effect of detector size on optical resolution in phase contrast microscopes," Opt. Lett. 29, 623-625 (2004)