Non-interferometric methods of phase estimation for application in optical tomography Export

@article{citeulike:6072773, abstract = {We describe here two non-interferometric methods for the estimation of the phase of transmitted wavefronts through refracting objects. The phase of the wavefronts obtained is used to reconstruct either the refractive index distribution of the objects or their contours. Refraction corrected reconstructions are obtained by the application of an iterative loop incorporating digital ray tracing for forward propagation and a modified filtered back projection (FBP) for reconstruction. The FBP is modified to take into account non-straight path propagation of light through the object. When the iteration stagnates, the difference between the projection data and an estimate of it obtained by ray tracing through the final reconstruction is reconstructed using a diffraction tomography algorithm. The reconstruction so obtained, viewed as a correction term, is added to the estimate of the object from the loop to obtain an improved final refractive index reconstruction.}, author = {Datta, G. Keshava and Vasu, R. M.}, citeulike-article-id = {6072773}, citeulike-linkout-0 = {http://dx.doi.org/10.1080/09500349908231341}, doi = {10.1080/09500349908231341}, journal = {Journal of Modern Optics}, keywords = {phase-retrieval, refraction, tomography}, number = {9}, pages = {1377--1388}, posted-at = {2009-11-05 09:37:51}, priority = {2}, publisher = {Taylor \& Francis}, title = {Non-interferometric methods of phase estimation for application in optical tomography}, url = {http://dx.doi.org/10.1080/09500349908231341}, volume = {46}, year = {1999} }

TY - JOUR ID - citeulike:6072773 L3 - citeulike-article-id:6072773 N2 - We describe here two non-interferometric methods for the estimation of the phase of transmitted wavefronts through refracting objects. The phase of the wavefronts obtained is used to reconstruct either the refractive index distribution of the objects or their contours. Refraction corrected reconstructions are obtained by the application of an iterative loop incorporating digital ray tracing for forward propagation and a modified filtered back projection (FBP) for reconstruction. The FBP is modified to take into account non-straight path propagation of light through the object. When the iteration stagnates, the difference between the projection data and an estimate of it obtained by ray tracing through the final reconstruction is reconstructed using a diffraction tomography algorithm. The reconstruction so obtained, viewed as a correction term, is added to the estimate of the object from the loop to obtain an improved final refractive index reconstruction. IS - 9 JF - Journal of Modern Optics EP - 1388 TI - Non-interferometric methods of phase estimation for application in optical tomography PB - Taylor & Francis VL - 46 SP - 1377 KW - phase-retrieval KW - refraction KW - tomography AU - Datta, Keshava AU - Vasu, RM PY - 1999/// UR - http://dx.doi.org/10.1080/09500349908231341 ER -