Glare suppression by coherence gated negation

Edward Haojiang Zhou, Atsushi Shibukawa, Joshua Brake, Haowen Ruan, Changhuei Yang

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1107-1113
Number of pages7
JournalOptica
Volume3
Issue number10
DOIs
Publication statusPublished - Oct 20 2016

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Keywords

  • Backscattering
  • Imaging through turbid media
  • Interferometric imaging
  • Speckle

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Zhou, E. H., Shibukawa, A., Brake, J., Ruan, H., & Yang, C. (2016). Glare suppression by coherence gated negation. Optica, 3(10), 1107-1113. https://doi.org/10.1364/OPTICA.3.001107