Optics and Photonics Society of Iran

Abstract - Mirau interferometric objectives can be employed as a common-path digital holographic microscopy (DHM) system. This system has several advantages including compactness and vibration-immune configuration. Nevertheless, due to their limited lateral resolution, with respect to the axial resolution, Mirau objectives have not been widely used for digital holography. In this paper, we provide a simple and effective method to enhance the lateral resolution of a Mirau based DHM. In this method a microsphere is inserted on the object light-path to increase the numerical aperture and hence the resolution. The experimental results from numerical reconstruction of the recorded digital holograms show that a microsphere of 0.5 mm size can increase the system's effective resolution by a factor of four.