Angular and polarization multiplexing techniques are utilized in both object and reference arms in the digital holographic microscopy system to improve its resolution. The angular multiplexing provides on-axis and off-axis illumination and reference beams with different carrier frequencies. Polarization multiplexing prohibits the occurrence of interference between low and high object spatial frequencies and reference beams. The proposed system does not require special light sources or filtering masks. Experimental results show that the resolution of the synthesized image exceeds the resolution determined by the numerical aperture of the imaging microscope objective.
© 2011 Optical Society of America
Original Manuscript: July 12, 2010
Revised Manuscript: August 4, 2010
Manuscript Accepted: August 13, 2010
Published: September 9, 2010
Vol. 6, Iss. 4 Virtual Journal for Biomedical Optics
Caojin Yuan, Guohai Situ, Giancarlo Pedrini, Jun Ma, and Wolfgang Osten, "Resolution improvement in digital holography by angular and polarization multiplexing," Appl. Opt. 50, B6-B11 (2011)