SPECKLE SIZE OF DIGITALLY RECONSTRUCTED WAVE-FRONTS OF DIFFUSELY SCATTERING OBJECTS

Authors
PEDRINI G TIZIANI HJ ZOU Y
Citation
G. Pedrini et al., SPECKLE SIZE OF DIGITALLY RECONSTRUCTED WAVE-FRONTS OF DIFFUSELY SCATTERING OBJECTS, J. mod. opt., 43(2), 1996, pp. 395-407
Citations number
13
Categorie Soggetti
Optics
Journal title
J. mod. opt. → ACNP
ISSN journal
09500340
Volume
43
Issue
2
Year of publication
1996
Pages
395 - 407
Database
ISI
SICI code
0950-0340(1996)43:2<395:SSODRW>2.0.ZU;2-K
Abstract
A hologram of an object is recorded using a CCD-sensor and stored in a frame grabber. The hologram is reconstructed digitally using a comput er by simulation of Fresnel diffraction. The complex amplitudes of the reconstructed wave fields and the coherence factor between two points in space is then calculated. The mean 3D speckle size in a digitally reconstructed wavefront is calculated by autocorrelation. By simulatin g ring apertures it is possible to reconstruct wavefronts containing s peckle clusters.