Self-generated off-axis holography in interferometric out-of-focus imaging of ice particles. Issue 1 (2nd January 2019)

• Record Type: Journal Article
• Authors: Talbi, Mohamed; Gréhan, Gérard; Coëtmellec, Sébastien; Brunel, Marc
• Is Part Of: Journal of electromagnetic waves and applications. Volume 33:Issue 1(2019)
• Page Start: 1
• Page End: 17
• Publication Date: 2019-01-02
• Subjects: Instrumentation -- metrology -- interferometric imaging -- digital holography; Electromagnetic waves -- Periodicals; Electromagnetic devices -- Periodicals; 621.3
• DOI: 10.1080/09205071.2018.1524797
• Languages: English
• ISSNs: 0920-5071

Abstract

ABSTRACT: Interferometric out-of-focus imaging of ice particles is realized. A review of the recent developments performed to analyse the speckle-like out-of-focus images of rough particles is first proposed. A remaining challenge is the analysis of overlapping out-of-focus images. In a second part, the overlapping defocused images of two nearby ice particles are analysed. If one particle is much smaller than the other one, the pattern constitutes an off-axis hologram whose analysis gives the exact size and shape of the biggest particle. Using two angles of view, we obtain a 3D description of the biggest ice particle.