Superresolution along extended depth of focus with binary-phase filters for the Gaussian beam.
In the paraxial Debye regime, simple and power-efficient pupil filters are designed to break the diffraction limit along a large depth of focus (DOF) for the Gaussian beam. Dependences of the superresolution factor, DOF gain, Strehl ratio, sidelobe strength, and axial intensity nonuniformity on the Gaussian profile in the pupil plane are characterized using the numerical method. Optimal filter designs are proposed for either high-resolution or ultra-large-DOF applications followed by experimental verifications.
Liu
Linbo
L
Graduate Programme in Bioengineering, National University of Singapore, Singapore.
Diaz
Frédéric
F
Wang
Liang
L
Loiseaux
Brigitte
B
Huignard
Jean-Pierre
JP
Sheppard
C J R
CJ
Chen
Nanguang
N
D016477:Artifacts; D008027:Light; D015233:Models, Statistical; D008962:Models, Theoretical; D016011:Normal Distribution; D009716:Numerical Analysis, Computer-Assisted; D055095:Optics and Photonics; D010363:Pattern Recognition, Automated; D012031:Refractometry