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Reducing the aperture size is a conventional technique to obtain enhancedimage resolution in optics but it is obscured by depleting illumination.Polarization coded apertures (PCAs) can be employed to circumvent this criticalartifact. We experimentally demonstrate intensity compensated polarizationencrypted apertures, which are designed using the polarization modulationcharacteristics of LC-SLM. PCAs are not limited by the aperture size and hencefar-field point spread function (PSF) can be more conveniently recorded usingthese PCAs. We experimentally validate that Depth of field (DOF) of adiffraction-limited lens and axial intensity of binary Fresnel zone plate(BFZP) is enhanced using PCAs with nominal intensity loss.

Extended depth of field of diffraction limited imaging system using spatial light modulator based intensity compensated polarization coded aperture