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Glare suppression by coherence gated negation.

ABSTRACT: Imaging of a weak target hidden behind a scattering medium can be significantly confounded by glare. We report a method, termed coherence gated negation (CGN), that uses destructive optical interference to suppress glare and allow improved imaging of a weak target. As a demonstration, we show that by permuting through a set range of amplitude and phase values for a reference beam interfering with the optical field from the glare and target reflection, we can suppress glare by an order of magnitude, even when the optical wavefront is highly disordered. This strategy significantly departs from conventional coherence gating methods in that CGN actively "gates out" the unwanted optical contributions while conventional methods "gate in" the target optical signal. We further show that the CGN method can outperform conventional coherence gating image quality in certain scenarios by more effectively rejecting unwanted optical contributions.

SUBMITTER: Zhou EH

PROVIDER: S-EPMC5509221 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature

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Glare suppression by coherence gated negation.

Zhou Edward Haojiang EH Shibukawa Atsushi A Brake Joshua J Ruan Haowen H Yang Changhuei C

Optica 20161005 10

Imaging of a weak target hidden behind a scattering medium can be significantly confounded by glare. We report a method, termed coherence gated negation (CGN), that uses destructive optical interference to suppress glare and allow improved imaging of a weak target. As a demonstration, we show that by permuting through a set range of amplitude and phase values for a reference beam interfering with the optical field from the glare and target reflection, we can suppress glare by an order of magnitu ...[more]

PMID: 28713849

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