High-visibility calculating ghost imaging with self-reconstruction capability and extendible depth-of-field

Author:

Zhou Dongxu,Zhang Hongzhi,Yu Hongyan,Zhang Guoquan1ORCID

Affiliation:

1. Shanxi University

Abstract

We customized light speckle fields with both super-bunching and non-diffracting properties, accordingly named as the super-bunching, non-diffracting (SP-ND) speckle fields, by introducing pupil function of a ring aperture with azimuthally correlated phases in the vertically opposite angles. Calculating ghost imaging based on the SP-ND speckle fields was demonstrated to be of higher visibility, higher spatial resolution and larger depth of field than that based on the conventional speckle fields such as pseudo-thermal fields. Interestingly, the SP-ND speckles are also of self-healing capability in respect of not only the speckle intensity distribution but also the high-order coherence properties. Therefore, even when the SP-ND speckle fields are seriously disturbed, for example, blocked partially by an opaque obstacle, ghost images are able to be reconstructed once the object is placed in the self-healed speckle fields.

Funder

National Natural Science Foundation of China

111 Project

Fundamental Research Funds for the Central Universities

Publisher

Optica Publishing Group

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