Desenvolvimento de um microscópio confocal de varredura laser para caracterização topográfica de superfícies

• Ano de defesa: 2012
• Autor(a) principal: Oliveira, André Rezende de Figueiredo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Engenharia Mecânica; Engenharias; UFU
• Palavras-chave em Português: Microscopia confocal laser; Topografia de superfície; Tribologia; Microscopia confocal; Confocal laser microscopy; Surface topography; Tribology; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/14904; https://doi.org/10.14393/ufu.di.2012.227

The objective of this is study is to develop a laser scanning confocal microscope, achieving submicron resolution in order to characterize surface topography. The laser scanned images are drawn point-by-point using control software. Comparing with other techniques of topographical characterization of surfaces: Laser Interferometer and Atomic Force Microscopy, the prototype showed a satisfactory performance. Confocal microscopy makes use of an optical technique that enhances contrast and builds three dimensional images by means of a pinhole. For the construction of a confocal image, a laser beam moves point-by-point and line-by-line on the sample surface. The device developed proved to be an appropriate a tool with adequate resolution to assess surfaces. The results are consistent with the best resolutions available, and the technique has potenctial to be employed in several research projects.