Speckle holographic imaging of a sound field using Fresnel lenses

Kenji Ishikawa*, Kohei Yatabe, Yasuhiro Oikawa, Yoshifumi Shiraki, Takehiro Moriya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this Letter, we propose to use Fresnel lenses for holographic sound-field imaging. Although a Fresnel lens has never been used for sound-field imaging mainly due to its low imaging quality, it has several desired properties, including thinness, lightweight, low cost, and ease of making a large aperture. We constructed an optical holographic imaging system composed of two Fresnel lenses used for magnification and demagnification of the illuminating beam. A proof-of-concept experiment verified that the sound-field imaging with Fresnel lenses is possible by using the spatiotemporally harmonic nature of sound.

Original languageEnglish
Pages (from-to)5688-5691
Number of pages4
JournalOptics Letters
Volume47
Issue number21
DOIs
Publication statusPublished - 2022 Nov 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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