Publication Type
Journal
Journal Name
Applied Optics
Publication Date
Page Numbers
827 to 833
Volume
46
Issue
6
Abstract
We present a computational method to increase the effective numerical aperture of a holographic microscopy system operating in air. Our optical system employs a reflection Mach-Zender architecture and computational reconstruction of the full complex (phase and amplitude) wavefront. Based on fundamental diffraction principles, different angles of incident illumination result in different diffracted orders of the object wave being imaged; we record, store, and computationally recombine these object waves to expand the spatial frequency response. Experimental results demonstrate an improvement in the effective numerical aperture of our system from 0.59 to 0.78. c 2006 Optical Society of America
OCIS codes: 090.1760, 090.2880
