Dynamic model for biospeckle

Resumo

This paper reports the development of a simple dynamic microscopic model to describe the main features of the phenomenon known as dynamic speckle, or biospeckle. Biospeckle is an interference pattern formed when a biological surface is illuminated with coherent light. The dynamic characteristics of biospeckle have been investigated as possible tools for assessing the quality of biological products. Our model, despite its simplicity, was able to reproduce qualitatively the main features of biospeckle. We were able to correlate variations in a microscopic parameter associated with movement of the particles comprising the organic surface with changes in a macroscopic parameter that measures the change rate of a dynamic interference pattern. We showed that this correlation occurs only within a limited range of parameter microscope values. We also showed how our model was able to describe nonuniform surfaces composed of more than one type of particles. (c) 2013 Optical Society of America

Ficha do documento

Tipo

Artigo científico

Ano

2013

Instituição

Optical Soc Amer

Fonte

Repositório da FGV

Idioma

Inglês

Acesso

Acesso restrito

DOI

10.1364/JOSAA.30.001089

Identificador

oai:repositorio.fgv.br:10438/23323

Palavras-chave

Laser speckleMatemáticaSpeckle