Data/hora: 16/06/2024 01:29:34

Provedor de dados: 	64	
País: 	Brazil	
Título: 	When noise became information: State-of-the-art in biospeckle laser	
Autores: 	Braga Júnior,Roberto Alves.	
Data: 	2017-07-01	
Ano: 	2017	
Palavras-chave: 	Optical metrology; Biosystems; Challenges.	
Resumo: 	ABSTRACT Laser was presented to science and industry in the 1960s and shortly became a useful tool in many areas, with applications based on its multiple characteristics such as coherence of light, which presents a phenomenon known as interference pattern, or speckle, when beam returns from an illuminated surface. Despite great application of speckle pattern, its residual presence, for example, in interferometric approaches was considered as a noise, demanding filtering. However, grains themselves became information as their dynamic changes in time started to be linked to biological sample activity. Dynamic laser speckle has been since then a phenomenon widely used to monitor biological activities in many areas from agriculture to medicine. It is known as biospeckle laser (BSL) when adopted in biological material, with high sensitivity to follow very tiny movements in biological tissues, linked to changes in speckle provided by scatterer activities inside and outside cells. Since the 1970s, biospeckle laser usage follows a crescent technologic spiral where technological developments opened room for new applications, while new demands regarding biological monitoring forced the development of new methodologies. Therefore, potential adoption of the phenomenon as a sensor, for instance, in agricultural and medical processes, as well as constant offer of new devices provided new turns in the BSL technologic spiral and opened room for technique improvement. In this study, I present a short history of biospeckle laser (BSL) with applications and development associated with challenges regarding its usage in portable and accessible devices or even in commercial equipment. And the history was packed in a temporal diagram identifying the breakpoints responsible for improvements in the use of the technique.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000400359	
Editor: 	Editora da Universidade Federal de Lavras	
Relação: 	10.1590/1413-70542017414000317	
Formato: 	text/html	
Fonte: 	Ciência e Agrotecnologia  v.41 n.4 2017	
Fonte: 	info:eu-repo/semantics/openAccess