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Resumen

 

 

CENTROIDS DEFINITION IN HARTMANN PATTERNS USING DIGITAL IMAGE PROCESSING

DEFINICIÓN DE CENTROIDES EN PATRONES DE HARTMANN MEDIANTE PROCESAMIENTO DIGITAL DE IMÁGENES
MSc. Andrés Fernando Jiménez López
Universidad Pedagógica y Tecnológica de Colombia,Sogamoso, Boyacá, Colombia.

Abstract: With an optical system that includes a screen with square array of holes we
sample a wavefront when it is illuminated with a collimated beam. The reconstruction of
the refracted wavefront is carried out with an algorithm based on the Fourier analysis,
which depends of the centroids detection of the spots in the observation screen using
digital image processing. The algorithm developed for the definition of the centroides in
the Hartmann patterns is explained in this document.

Keywords: Centroid, Hartmann pattern, spot, wavefront.

Resumen: Con un sistema óptico que incluye una pantalla con un arreglo de agujeros se
muestrea un frente de onda cuando éste, es iluminado con un haz de luz colimado. La
reconstrucción del frente de onda refractado se determina con un algoritmo basado en
análisis de Fourier, el cual depende de la detección de centroides de las manchas en la
pantalla de observación mediante procesamiento digital de imágenes. El algoritmo
desarrollado para la definición de los centroides de los patrones de Hartmann se describe
en éste documento.

Palabras clave: Centroide, Patrón de Hartmann, mancha, frente de onda.