Artículo
Photothermal camera port accessory for microscopic thermal diffusivity imaging
Fecha de publicación:
06/2016
Editorial:
Spie
Revista:
Optical Engineering
ISSN:
0091-3286
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The design of a scanning photothermal accessory is presented, which can be attached to the camera port of commercial microscopes to measure thermal diffusivity maps with micrometer resolution. The device is based on the thermal expansion recovery technique, which measures the defocusing of a probe beam due to the curvature induced by the local heat delivered by a focused pump beam. The beam delivery and collecting optics are built using optical fiber technology, resulting in a robust optical system that provides collinear pump and probe beams without any alignment adjustment necessary. The quasiconfocal configuration for the signal collection using the same optical fiber sets very restrictive conditions on the positioning and alignment of the optical components of the scanning unit, and a detailed discussion of the design equations is presented. The alignment procedure is carefully described, resulting in a system so robust and stable that no further alignment is necessary for the day-to-day use, becoming a tool that can be used for routine quality control, operated by a trained technician.
Palabras clave:
Microscopy
,
Photothermal
,
Thermal Diffusivity
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Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Zaldivar Escola, Facundo; Kunik, Dario; Mingolo, Nelida; Martínez, Oscar Eduardo; Photothermal camera port accessory for microscopic thermal diffusivity imaging; Spie; Optical Engineering; 55; 6; 6-2016; 1-10
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