TY - JOUR
T1 - All-optical extended depth of field imaging system
AU - Ben-Eliezer, Eyal
AU - Zalevsky, Zeev
AU - Marom, Emanuel
AU - Konforti, Naim
PY - 2003/9
Y1 - 2003/9
N2 - We describe a novel approach whereby a phase mask consisting of several spatially multiplexed Fresnel lenses (FL) positioned in the pupil of an imaging system increases the depth of field (DOF) significantly. Each FL acts essentially as a corrective lens with a slightly different focal length. Keeping the detector plane in a fixed location, each individual FL provides perfect imaging for different object planes, with a certain DOF tolerance around it. Allowing the individual DOFs to overlap slightly, the resulting composite DOF of the imaging system is highly extended. Nevertheless, the increased DOF is coupled with a reduction in image contrast and resolution. System analysis and simulation results are presented.
AB - We describe a novel approach whereby a phase mask consisting of several spatially multiplexed Fresnel lenses (FL) positioned in the pupil of an imaging system increases the depth of field (DOF) significantly. Each FL acts essentially as a corrective lens with a slightly different focal length. Keeping the detector plane in a fixed location, each individual FL provides perfect imaging for different object planes, with a certain DOF tolerance around it. Allowing the individual DOFs to overlap slightly, the resulting composite DOF of the imaging system is highly extended. Nevertheless, the increased DOF is coupled with a reduction in image contrast and resolution. System analysis and simulation results are presented.
KW - Extended depth of field
KW - Imaging systems
KW - MTF
KW - OTF
UR - http://www.scopus.com/inward/record.url?scp=0141757393&partnerID=8YFLogxK
U2 - 10.1088/1464-4258/5/5/359
DO - 10.1088/1464-4258/5/5/359
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AN - SCOPUS:0141757393
SN - 1464-4258
VL - 5
SP - S164-S169
JO - Journal of Optics A: Pure and Applied Optics
JF - Journal of Optics A: Pure and Applied Optics
IS - 5
ER -