Open AccessFocal depth research of digital holographic reconstructed image
Author(s) -
Junchang Li
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.134203
Subject(s) - holography , pixel , superposition principle , optics , digital holography , computation , artificial intelligence , computer vision , computer science , diffraction , physics , object (grammar) , feature (linguistics) , image (mathematics) , iterative reconstruction , algorithm , linguistics , philosophy , quantum mechanics
Regarding the object scattering light as a superposition of light waves emitting from a lots of point sources on object surface of which phases have random values, in the paper, wee investigate the diffracted field of digital holographic reconstructed image and defocused image. The definition of depth of focal (DOF) is also given based on the feature that the reconstructed image is displayed in pixels. According to the characteristic that the physical dimensions of pixel are associated with computation method, focal depth expressions are deduced when image is reconstructed with different algorithms. Finally, experimental verification is given.