Abstract

In this Letter we propose a method to enhance the limited depth of field (DOF) in optical imaging systems, through digital holography. The proposed approach is based on the introduction of a cubic phase plate into the diffraction integral, analogous to what occurs in white-light imaging systems. By this approach we show that it is possible to improve the DOF and to recover the extended focus image of a tilted object in a single reconstruction step. Moreover, we demonstrate the possibility of obtaining well-focused biological cells flowing into a tilted microfluidic channel.

© 2013 Optical Society of America

Creating an extended focus image of a tilted object in Fourier digital holography

Melania Paturzo and Pietro Ferraro
Opt. Express 17(22) 20546-20552 (2009)

Imaging through scattering microfluidic channels by digital holography for information recovery in lab on chip

V. Bianco, M. Paturzo, O. Gennari, A. Finizio, and P. Ferraro
Opt. Express 21(20) 23985-23996 (2013)

Controlling depth of focus in 3D image reconstructions by flexible and adaptive deformation of digital holograms

P. Ferraro, M. Paturzo, P. Memmolo, and A. Finizio
Opt. Lett. 34(18) 2787-2789 (2009)

Calibration of a digital in-line holographic microscopy system: depth of focus and bioprocess analysis

James P. Ryle, Susan McDonnell, Brian Glennon, and John T. Sheridan
Appl. Opt. 52(7) C78-C87 (2013)

Single channel in-line multimodal digital holography

Yair Rivenson, Barak Katz, Roy Kelner, and Joseph Rosen
Opt. Lett. 38(22) 4719-4722 (2013)