Comment on "Reconstruction algorithm for high-numerical-aperture holograms with diffraction-limited resolution".
We comment on a recent Letter by Zhang et al. [Opt. Lett. 31, 1633 (2006)] in which the authors proposed a reconstruction algorithm for high-numerical-aperture (NA) holograms. Such an algorithm has been available for in-line holography for more than a decade. The authors' "achievement" of high NA for digital in-line holography, NA=0.17, is below what was reported already several years ago (NA=0.30) and is considerably lower than what is routinely achieved now. We present reconstructions of holograms acquired with NAs above 0.4 in which we show maximal achievable resolution.
Garcia-Sucerquia
J
J
Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, Canada. jigarcia@fizz.phys.dal.ca
Alvarez-Palacio
D C
DC
Jericho
M H
MH
Kreuzer
H J
HJ