Scattering spot imaging for the determination of optical and dynamical properties of viscoelastic media

OPTICS COMMUNICATIONS

卷:439

Article

Abou Nader, Christelle¹  Tualle, Jean-Michel¹  Tinet, Eric¹  Ettori, Dominique¹ 

[1] Univ Paris 13, Inst Galilee, CNRS UMR 7538, Lab Phys Lasers, 99 Av JB Clement, F-93430 Villetaneuse, France

关键词: Speckle;    Correlation spectroscopy;    Dynamical properties;    Optical properties;   

DOI  :  10.1016/j.optcom.2019.01.079

来源: Elsevier

【 摘 要 】

The non-contact evaluation of dynamical properties of media presents several medical, biological, and industrial applications. Diverse optical methods, operating at different scales with various targeted applications, are currently being considered as alternatives to traditional mechanical testing devices. However, the accuracy of most optical techniques upon multiple scattering is compromised by the influence of the medium's optical properties, namely scattering and absorption. Therefore, in order to accurately estimate dynamical properties, that are related to mechanical features, it is of pivotal importance to determine the medium's optical properties. In this paper, we present a new simple scheme for the assessment of optical as well as dynamical properties of viscoelastic media. We demonstrate, for the first time, the possibility of estimating absorption, scattering, and dynamical properties using scattering spot imaging with a standard CCD camera at multiple exposure times and with a monochromatic continuous wave (CW) illuminance.

【 授权许可】

Free