Incoherent Lensless Imaging Via Coherency Back-Propagation

Abstract

The two-point complex coherence function constitutes a complete representation for scalar quasi-monochromatic optical fields. Exploiting dynamically reconfigurable slits implemented with a digital micromirror device, we report on measurements of the complex two-point coherence function for partially coherent light scattering from a “scene” composing one or two objects at different transverse and axial positions with respect to the source. Although the intensity shows no discernible shadows in the absence of a lens, numerically back-propagating the measured complex coherence function allows estimating the objects’ sizes and locations and, thus, the reconstruction of the scene subject to the effects of occlusion and shadowing.

Publication Date

8-15-2017

Publication Title

Optics Letters

Volume

42

Issue

16

Number of Pages

3089-3092

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.42.003089

Socpus ID

85027520716 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85027520716

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